--- _id: '6269' abstract: - lang: eng text: 'Clathrin-Mediated Endocytosis (CME) is an aspect of cellular trafficking that is constantly regulated for mediating developmental and physiological responses. The main aim of my thesis is to decipher the basic mechanisms of CME and post-endocytic trafficking in the whole multicellular organ systems of Arabidopsis. The first chapter of my thesis describes the search for new components involved in CME. Tandem affinity purification was conducted using CLC and its interacting partners were identified. Amongst the identified proteins were the Auxilin-likes1 and 2 (Axl1/2), putative uncoating factors, for which we made a full functional analysis. Over-expression of Axl1/2 causes extreme modifications in the dynamics of the machinery proteins and inhibition of endocytosis altogether. However the loss of function of the axl1/2 did not present any cellular or physiological phenotype, meaning Auxilin-likes do not form the major uncoating machinery. The second chapter of my thesis describes the establishment/utilisation of techniques to capture the dynamicity and the complexity of CME and post-endocytic trafficking. We have studied the development of endocytic pits at the PM – specifically, the mode of membrane remodeling during pit development and the role of actin in it, given plant cells possess high turgor pressure. Utilizing the improved z-resolution of TIRF and VAEM techniques, we captured the time-lapse of the endocytic events at the plasma membrane; and using particle detection software, we quantitatively analysed all the endocytic trajectories in an unbiased way to obtain the endocytic rate of the system. This together with the direct analysis of cargo internalisation from the PM provided an estimate on the endocytic potential of the cell. We also developed a methodology for ultrastructural analysis of different populations of Clathrin-Coated Structures (CCSs) in both PM and endomembranes in unroofed protoplasts. Structural analysis, together with the intensity profile of CCSs at the PM show that the mode of CCP development at the PM follows ‘Constant curvature model’; meaning that clathrin polymerisation energy is a major contributing factor of membrane remodeling. In addition, other analyses clearly show that actin is not required for membrane remodeling during invagination or any other step of CCP development, despite the prevalent high turgor pressure. However, actin is essential in orchestrating the post-endocytic trafficking of CCVs facilitating the EE formation. We also observed that the uncoating process post-endocytosis is not immediate; an alternative mechanism of uncoating – Sequential multi-step process – functions in the cell. Finally we also looked at one of the important physiological stimuli modulating the process – hormone, auxin. auxin has been known to influence CME before. We have made a detailed study on the concentration-time based effect of auxin on the machinery proteins, CCP development, and the specificity of cargoes endocytosed. To this end, we saw no general effect of auxin on CME at earlier time points. However, very low concentration of IAA, such as 50nM, accelerates endocytosis of specifically PIN2 through CME. Such a tight regulatory control with high specificity to PIN2 could be essential in modulating its polarity. ' acknowledged_ssus: - _id: Bio - _id: EM-Fac alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Madhumitha full_name: Narasimhan, Madhumitha id: 44BF24D0-F248-11E8-B48F-1D18A9856A87 last_name: Narasimhan orcid: 0000-0002-8600-0671 citation: ama: Narasimhan M. Clathrin-Mediated endocytosis, post-endocytic trafficking and their regulatory controls in plants . 2019. doi:10.15479/at:ista:th1075 apa: Narasimhan, M. (2019). Clathrin-Mediated endocytosis, post-endocytic trafficking and their regulatory controls in plants . Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:th1075 chicago: Narasimhan, Madhumitha. “Clathrin-Mediated Endocytosis, Post-Endocytic Trafficking and Their Regulatory Controls in Plants .” Institute of Science and Technology Austria, 2019. https://doi.org/10.15479/at:ista:th1075. ieee: M. Narasimhan, “Clathrin-Mediated endocytosis, post-endocytic trafficking and their regulatory controls in plants ,” Institute of Science and Technology Austria, 2019. ista: Narasimhan M. 2019. Clathrin-Mediated endocytosis, post-endocytic trafficking and their regulatory controls in plants . Institute of Science and Technology Austria. mla: Narasimhan, Madhumitha. Clathrin-Mediated Endocytosis, Post-Endocytic Trafficking and Their Regulatory Controls in Plants . Institute of Science and Technology Austria, 2019, doi:10.15479/at:ista:th1075. short: M. Narasimhan, Clathrin-Mediated Endocytosis, Post-Endocytic Trafficking and Their Regulatory Controls in Plants , Institute of Science and Technology Austria, 2019. date_created: 2019-04-09T14:37:06Z date_published: 2019-02-04T00:00:00Z date_updated: 2023-09-08T11:43:03Z day: '04' ddc: - '575' degree_awarded: PhD department: - _id: JiFr doi: 10.15479/at:ista:th1075 file: - access_level: open_access checksum: c958f27dd752712886e7e2638b847a3c content_type: video/x-msvideo creator: dernst date_created: 2019-04-09T14:35:18Z date_updated: 2021-02-11T23:30:15Z embargo: 2020-02-11 file_id: '6270' file_name: Supplementary_movie_1.avi file_size: 5402078 relation: main_file - access_level: open_access checksum: 8786fdc29c62987c0aad3c866a4d3691 content_type: video/x-msvideo creator: dernst date_created: 2019-04-09T14:35:18Z date_updated: 2021-02-11T23:30:15Z embargo: 2020-02-11 file_id: '6271' file_name: 3.7_supplementary_movie_10.avi file_size: 5927736 relation: main_file - access_level: open_access checksum: 25f784c5159d6f4d966b2f9b371ebaf6 content_type: video/x-msvideo creator: dernst date_created: 2019-04-09T14:35:18Z date_updated: 2021-02-11T23:30:15Z embargo: 2020-02-11 file_id: '6272' file_name: 3.7_supplementary_movie_9.avi file_size: 9570210 relation: main_file - 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access_level: open_access checksum: 4fcdaa3a6c645514a3b3205f0f69dc76 content_type: application/pdf creator: dernst date_created: 2019-04-09T14:35:33Z date_updated: 2021-02-11T11:17:15Z embargo: 2020-02-11 file_id: '6285' file_name: 2019_Thesis_Narasimhan.pdf file_size: 10553937 relation: main_file - access_level: closed checksum: 268f0b6bad21d5f0d671e5d4b88104a7 content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: dernst date_created: 2019-04-09T14:35:36Z date_updated: 2020-07-14T12:47:26Z embargo_to: open_access file_id: '6286' file_name: 2019_Thesis_Narasimhan_source.docx file_size: 135291990 relation: source_file file_date_updated: 2021-02-11T23:30:15Z has_accepted_license: '1' language: - iso: eng license: https://creativecommons.org/licenses/by/4.0/ month: '02' oa: 1 oa_version: Published Version page: '138' publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '412' relation: part_of_dissertation status: public status: public supervisor: - first_name: Jiří full_name: Friml, Jiří id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 title: 'Clathrin-Mediated endocytosis, post-endocytic trafficking and their regulatory controls in plants ' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2019' ... --- _id: '11222' acknowledgement: This work was supported by the ERC and EU Horizon 2020 (ERC 692692; MSC-IF 708497) and FWF Z 312-B27 Wittgenstein award; W 1205-B09). article_number: A3.27 article_processing_charge: No author: - first_name: Olena full_name: Kim, Olena id: 3F8ABDDA-F248-11E8-B48F-1D18A9856A87 last_name: Kim - first_name: Carolina full_name: Borges Merjane, Carolina id: 4305C450-F248-11E8-B48F-1D18A9856A87 last_name: Borges Merjane orcid: 0000-0003-0005-401X - first_name: Peter M full_name: Jonas, Peter M id: 353C1B58-F248-11E8-B48F-1D18A9856A87 last_name: Jonas orcid: 0000-0001-5001-4804 citation: ama: 'Kim O, Borges Merjane C, Jonas PM. Functional analysis of the docked vesicle pool in hippocampal mossy fiber terminals by electron microscopy. In: Intrinsic Activity. Vol 7. Austrian Pharmacological Society; 2019. doi:10.25006/ia.7.s1-a3.27' apa: 'Kim, O., Borges Merjane, C., & Jonas, P. M. (2019). Functional analysis of the docked vesicle pool in hippocampal mossy fiber terminals by electron microscopy. In Intrinsic Activity (Vol. 7). Innsbruck, Austria: Austrian Pharmacological Society. https://doi.org/10.25006/ia.7.s1-a3.27' chicago: Kim, Olena, Carolina Borges Merjane, and Peter M Jonas. “Functional Analysis of the Docked Vesicle Pool in Hippocampal Mossy Fiber Terminals by Electron Microscopy.” In Intrinsic Activity, Vol. 7. Austrian Pharmacological Society, 2019. https://doi.org/10.25006/ia.7.s1-a3.27. ieee: O. Kim, C. Borges Merjane, and P. M. Jonas, “Functional analysis of the docked vesicle pool in hippocampal mossy fiber terminals by electron microscopy,” in Intrinsic Activity, Innsbruck, Austria, 2019, vol. 7, no. Suppl. 1. ista: 'Kim O, Borges Merjane C, Jonas PM. 2019. Functional analysis of the docked vesicle pool in hippocampal mossy fiber terminals by electron microscopy. Intrinsic Activity. ANA: Austrian Neuroscience Association ; APHAR: Austrian Pharmacological Society vol. 7, A3.27.' mla: Kim, Olena, et al. “Functional Analysis of the Docked Vesicle Pool in Hippocampal Mossy Fiber Terminals by Electron Microscopy.” Intrinsic Activity, vol. 7, no. Suppl. 1, A3.27, Austrian Pharmacological Society, 2019, doi:10.25006/ia.7.s1-a3.27. short: O. Kim, C. Borges Merjane, P.M. Jonas, in:, Intrinsic Activity, Austrian Pharmacological Society, 2019. conference: end_date: 2019-09-27 location: Innsbruck, Austria name: 'ANA: Austrian Neuroscience Association ; APHAR: Austrian Pharmacological Society' start_date: 2019-09-25 date_created: 2022-04-20T15:06:05Z date_published: 2019-09-11T00:00:00Z date_updated: 2024-03-27T23:30:07Z day: '11' department: - _id: PeJo doi: 10.25006/ia.7.s1-a3.27 ec_funded: 1 intvolume: ' 7' issue: Suppl. 1 keyword: - hippocampus - mossy fibers - readily releasable pool - electron microscopy language: - iso: eng main_file_link: - open_access: '1' url: https://www.intrinsicactivity.org/2019/7/S1/A3.27/ month: '09' oa: 1 oa_version: Published Version project: - _id: 25B7EB9E-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '692692' name: Biophysics and circuit function of a giant cortical glumatergic synapse - _id: 25BAF7B2-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '708497' name: Presynaptic calcium channels distribution and impact on coupling at the hippocampal mossy fiber synapse - _id: 25C3DBB6-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: W01205 name: Zellkommunikation in Gesundheit und Krankheit - _id: 25C5A090-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: Z00312 name: The Wittgenstein Prize publication: Intrinsic Activity publication_identifier: issn: - 2309-8503 publication_status: published publisher: Austrian Pharmacological Society quality_controlled: '1' related_material: record: - id: '11196' relation: dissertation_contains status: public status: public title: Functional analysis of the docked vesicle pool in hippocampal mossy fiber terminals by electron microscopy type: conference_abstract user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 7 year: '2019' ... --- _id: '6947' abstract: - lang: eng text: Lymph nodes are es s ential organs of the immune s ys tem where adaptive immune responses originate, and consist of various leukocyte populations and a stromal backbone. Fibroblastic reticular cells (FRCs) are the main stromal cells and form a sponge-like extracellular matrix network, called conduits , which they thems elves enwrap and contract. Lymph, containing s oluble antigens , arrive in lymph nodes via afferent lymphatic vessels that connect to the s ubcaps ular s inus and conduit network. According to the current paradigm, the conduit network dis tributes afferent lymph through lymph nodes and thus provides acces s for immune cells to lymph-borne antigens. An elas tic caps ule s urrounds the organ and confines the immune cells and FRC network. Lymph nodes are completely packed with lymphocytes and lymphocyte numbers directly dictates the size of the organ. Although lymphocytes cons tantly enter and leave the lymph node, its s ize remains remarkedly s table under homeostatic conditions. It is only partly known how the cellularity and s ize of the lymph node is regulated and how the lymph node is able to swell in inflammation. The role of the FRC network in lymph node s welling and trans fer of fluids are inves tigated in this thes is. Furthermore, we s tudied what trafficking routes are us ed by cancer cells in lymph nodes to form distal metastases.We examined the role of a mechanical feedback in regulation of lymph node swelling. Using parallel plate compression and UV-las er cutting experiments we dis s ected the mechanical force dynamics of the whole lymph node, and individually for FRCs and the caps ule. Physical forces generated by packed lymphocytes directly affect the tens ion on the FRC network and capsule, which increases its resistance to swelling. This implies a feedback mechanism between tis s ue pres s ure and ability of lymphocytes to enter the organ. Following inflammation, the lymph node swells ∼10 fold in two weeks . Yet, what is the role for tens ion on the FRC network and caps ule, and how are lymphocytes able to enter in conditions that resist swelling remain open ques tions . We s how that tens ion on the FRC network is important to limit the swelling rate of the organ so that the FRC network can grow in a coordinated fashion. This is illustrated by interfering with FRC contractility, which leads to faster swelling rates and a dis organized FRC network in the inflamed lymph node. Growth of the FRC network in turn is expected to releas e tens ion on thes e s tructures and lowers the res is tance to swelling, thereby allowing more lymphocytes to enter the organ and drive more swelling. Halt of swelling coincides with a thickening of the caps ule, which forms a thick res is tant band around the organ and lowers tens ion on the FRC network to form a new force equilibrium.The FRC and conduit network are further believed to be a privileged s ite of s oluble information within the lymph node, although many details remain uns olved. We s how by 3D ultra-recons truction that FRCs and antigen pres enting cells cover the s urface of conduit s ys tem for more than 99% and we dis cus s the implications for s oluble information exchangeat the conduit level.Finally, there is an ongoing debate in the cancer field whether and how cancer cells in lymph nodes s eed dis tal metas tas es . We s how that cancer cells infus ed into the lymph node can utilize trafficking routes of immune cells and rapidly migrate to blood vessels. Once in the blood circulation, these cells are able to form metastases in distal tissues. acknowledged_ssus: - _id: Bio - _id: PreCl - _id: EM-Fac alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Frank P full_name: Assen, Frank P id: 3A8E7F24-F248-11E8-B48F-1D18A9856A87 last_name: Assen orcid: 0000-0003-3470-6119 citation: ama: 'Assen FP. Lymph node mechanics: Deciphering the interplay between stroma contractility, morphology and lymphocyte trafficking. 2019. doi:10.15479/AT:ISTA:6947' apa: 'Assen, F. P. (2019). Lymph node mechanics: Deciphering the interplay between stroma contractility, morphology and lymphocyte trafficking. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:6947' chicago: 'Assen, Frank P. “Lymph Node Mechanics: Deciphering the Interplay between Stroma Contractility, Morphology and Lymphocyte Trafficking.” Institute of Science and Technology Austria, 2019. https://doi.org/10.15479/AT:ISTA:6947.' ieee: 'F. P. Assen, “Lymph node mechanics: Deciphering the interplay between stroma contractility, morphology and lymphocyte trafficking,” Institute of Science and Technology Austria, 2019.' ista: 'Assen FP. 2019. Lymph node mechanics: Deciphering the interplay between stroma contractility, morphology and lymphocyte trafficking. Institute of Science and Technology Austria.' mla: 'Assen, Frank P. Lymph Node Mechanics: Deciphering the Interplay between Stroma Contractility, Morphology and Lymphocyte Trafficking. Institute of Science and Technology Austria, 2019, doi:10.15479/AT:ISTA:6947.' short: 'F.P. Assen, Lymph Node Mechanics: Deciphering the Interplay between Stroma Contractility, Morphology and Lymphocyte Trafficking, Institute of Science and Technology Austria, 2019.' date_created: 2019-10-14T16:54:52Z date_published: 2019-10-09T00:00:00Z date_updated: 2023-09-13T08:50:57Z day: '9' ddc: - '570' degree_awarded: PhD department: - _id: MiSi doi: 10.15479/AT:ISTA:6947 file: - access_level: closed checksum: 53a739752a500f84d0f8ec953cbbd0b6 content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: fassen date_created: 2019-11-06T12:30:02Z date_updated: 2020-11-07T23:30:03Z embargo_to: open_access file_id: '6990' file_name: PhDthesis_FrankAssen_revised2.docx file_size: 214172667 relation: source_file - access_level: open_access checksum: 8c156b65d9347bb599623a4b09f15d15 content_type: application/pdf creator: fassen date_created: 2019-11-06T12:30:57Z date_updated: 2020-11-07T23:30:03Z embargo: 2020-11-06 file_id: '6991' file_name: PhDthesis_FrankAssen_revised2.pdf file_size: 83637532 relation: main_file file_date_updated: 2020-11-07T23:30:03Z has_accepted_license: '1' language: - iso: eng month: '10' oa: 1 oa_version: Published Version page: '142' publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '664' relation: part_of_dissertation status: public - id: '402' relation: part_of_dissertation status: public status: public supervisor: - first_name: Michael K full_name: Sixt, Michael K id: 41E9FBEA-F248-11E8-B48F-1D18A9856A87 last_name: Sixt orcid: 0000-0002-6620-9179 title: 'Lymph node mechanics: Deciphering the interplay between stroma contractility, morphology and lymphocyte trafficking' type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2019' ... --- _id: '6849' abstract: - lang: eng text: 'Brain function is mediated by complex dynamical interactions between excitatory and inhibitory cell types. The Cholecystokinin-expressing inhibitory cells (CCK-interneurons) are one of the least studied types, despite being suspected to play important roles in cognitive processes. We studied the network effects of optogenetic silencing of CCK-interneurons in the CA1 hippocampal area during exploration and sleep states. The cell firing pattern in response to light pulses allowed us to classify the recorded neurons in 5 classes, including disinhibited and non-responsive pyramidal cell and interneurons, and the inhibited interneurons corresponding to the CCK group. The light application, which inhibited the activity of CCK interneurons triggered wider changes in the firing dynamics of cells. We observed rate changes (i.e. remapping) of pyramidal cells during the exploration session in which the light was applied relative to the previous control session that was not restricted neither in time nor space to the light delivery. Also, the disinhibited pyramidal cells had higher increase in bursting than in single spike firing rate as a result of CCK silencing. In addition, the firing activity patterns during exploratory periods were more weakly reactivated in sleep for those periods in which CCK-interneuron were silenced than in the unaffected periods. Furthermore, light pulses during sleep disrupted the reactivation of recent waking patterns. Hence, silencing CCK neurons during exploration suppressed the reactivation of waking firing patterns in sleep and CCK interneuron activity was also required during sleep for the normal reactivation of waking patterns. These findings demonstrate the involvement of CCK cells in reactivation-related memory consolidation. An important part of our analysis was to test the relationship of the identified CCKinterneurons to brain oscillations. Our findings showed that these cells exhibited different oscillatory behaviour during anaesthesia and natural waking and sleep conditions. We showed that: 1) Contrary to the past studies performed under anaesthesia, the identified CCKinterneurons fired on the descending portion of the theta phase in waking exploration. 2) CCKinterneuron preferred phases around the trough of gamma oscillations. 3) Contrary to anaesthesia conditions, the average firing rate of the CCK-interneurons increased around the peak activity of the sharp-wave ripple (SWR) events in natural sleep, which is congruent with new reports about their functional connectivity. We also found that light driven CCK-interneuron silencing altered the dynamics on the CA1 network oscillatory activity: 1) Pyramidal cells negatively shifted their preferred theta phases when the light was applied, while interneurons responses were less consistent. 2) As a population, pyramidal cells negatively shifted their preferred activity during gamma oscillations, albeit we did not find gamma modulation differences related to the light application when pyramidal cells were subdivided into the disinhibited and unaffected groups. 3) During the peak of SWR events, all but the CCK-interneurons had a reduction in their relative firing rate change during the light application as compared to the change observed at SWR initiation. Finally, regarding to the place field activity of the recorded pyramidal neurons, we showed that the disinhibited pyramidal cells had reduced place field similarity, coherence and spatial information, but only during the light application. The mechanisms behind such observed behaviours might involve eCB signalling and plastic changes in CCK-interneuron synapses. In conclusion, the observed changes related to the light-mediated silencing of CCKinterneurons have unravelled characteristics of this interneuron subpopulation that might change the understanding not only of their particular network interactions, but also of the current theories about the emergence of certain cognitive processes such as place coding needed for navigation or hippocampus-dependent memory consolidation. ' acknowledged_ssus: - _id: Bio - _id: PreCl - _id: M-Shop alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Dámaris K full_name: Rangel Guerrero, Dámaris K id: 4871BCE6-F248-11E8-B48F-1D18A9856A87 last_name: Rangel Guerrero orcid: 0000-0002-8602-4374 citation: ama: Rangel Guerrero DK. The role of CCK-interneurons in regulating hippocampal network dynamics. 2019. doi:10.15479/AT:ISTA:6849 apa: Rangel Guerrero, D. K. (2019). The role of CCK-interneurons in regulating hippocampal network dynamics. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:6849 chicago: Rangel Guerrero, Dámaris K. “The Role of CCK-Interneurons in Regulating Hippocampal Network Dynamics.” Institute of Science and Technology Austria, 2019. https://doi.org/10.15479/AT:ISTA:6849. ieee: D. K. Rangel Guerrero, “The role of CCK-interneurons in regulating hippocampal network dynamics,” Institute of Science and Technology Austria, 2019. ista: Rangel Guerrero DK. 2019. The role of CCK-interneurons in regulating hippocampal network dynamics. Institute of Science and Technology Austria. mla: Rangel Guerrero, Dámaris K. The Role of CCK-Interneurons in Regulating Hippocampal Network Dynamics. Institute of Science and Technology Austria, 2019, doi:10.15479/AT:ISTA:6849. short: D.K. Rangel Guerrero, The Role of CCK-Interneurons in Regulating Hippocampal Network Dynamics, Institute of Science and Technology Austria, 2019. date_created: 2019-09-06T06:54:16Z date_published: 2019-09-09T00:00:00Z date_updated: 2023-09-19T10:01:12Z day: '09' ddc: - '570' degree_awarded: PhD department: - _id: JoCs doi: 10.15479/AT:ISTA:6849 file: - access_level: closed checksum: 244dc4f74dbfc94f414156092298831f content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: drangel date_created: 2019-09-09T13:09:45Z date_updated: 2021-02-10T23:30:09Z embargo_to: open_access file_id: '6865' file_name: Thesis_Damaris_Rangel_source.docx file_size: 18253100 relation: source_file - access_level: open_access checksum: 59c73be40eeaa1c4db24067270151555 content_type: application/pdf creator: drangel date_created: 2019-09-09T13:09:52Z date_updated: 2020-09-11T22:30:04Z embargo: 2020-09-10 file_id: '6866' file_name: Thesis_Damaris_Rangel_pdfa.pdf file_size: 2160109 relation: main_file request_a_copy: 0 file_date_updated: 2021-02-10T23:30:09Z has_accepted_license: '1' language: - iso: eng month: '09' oa: 1 oa_version: Published Version page: '97' publication_identifier: isbn: - '9783990780039' issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '5914' relation: part_of_dissertation status: public status: public supervisor: - first_name: Jozsef L full_name: Csicsvari, Jozsef L id: 3FA14672-F248-11E8-B48F-1D18A9856A87 last_name: Csicsvari orcid: 0000-0002-5193-4036 title: The role of CCK-interneurons in regulating hippocampal network dynamics type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2019' ... --- _id: '6351' abstract: - lang: eng text: "A process of restorative patterning in plant roots correctly replaces eliminated cells to heal local injuries despite the absence of cell migration, which underpins wound healing in animals. \r\n\r\nPatterning in plants relies on oriented cell divisions and acquisition of specific cell identities. Plants regularly endure wounds caused by abiotic or biotic environmental stimuli and have developed extraordinary abilities to restore their tissues after injuries. Here, we provide insight into a mechanism of restorative patterning that repairs tissues after wounding. Laser-assisted elimination of different cells in Arabidopsis root combined with live-imaging tracking during vertical growth allowed analysis of the regeneration processes in vivo. Specifically, the cells adjacent to the inner side of the injury re-activated their stem cell transcriptional programs. They accelerated their progression through cell cycle, coordinately changed the cell division orientation, and ultimately acquired de novo the correct cell fates to replace missing cells. These observations highlight existence of unknown intercellular positional signaling and demonstrate the capability of specified cells to re-acquire stem cell programs as a crucial part of the plant-specific mechanism of wound healing." acknowledged_ssus: - _id: Bio article_processing_charge: No author: - first_name: Petra full_name: Marhavá, Petra id: 44E59624-F248-11E8-B48F-1D18A9856A87 last_name: Marhavá - first_name: Lukas full_name: Hörmayer, Lukas id: 2EEE7A2A-F248-11E8-B48F-1D18A9856A87 last_name: Hörmayer orcid: 0000-0001-8295-2926 - first_name: Saiko full_name: Yoshida, Saiko id: 2E46069C-F248-11E8-B48F-1D18A9856A87 last_name: Yoshida - first_name: Peter full_name: Marhavy, Peter id: 3F45B078-F248-11E8-B48F-1D18A9856A87 last_name: Marhavy orcid: 0000-0001-5227-5741 - first_name: Eva full_name: Benková, Eva id: 38F4F166-F248-11E8-B48F-1D18A9856A87 last_name: Benková orcid: 0000-0002-8510-9739 - first_name: Jiří full_name: Friml, Jiří id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 citation: ama: Marhavá P, Hörmayer L, Yoshida S, Marhavý P, Benková E, Friml J. Re-activation of stem cell pathways for pattern restoration in plant wound healing. Cell. 2019;177(4):957-969.e13. doi:10.1016/j.cell.2019.04.015 apa: Marhavá, P., Hörmayer, L., Yoshida, S., Marhavý, P., Benková, E., & Friml, J. (2019). Re-activation of stem cell pathways for pattern restoration in plant wound healing. Cell. Elsevier. https://doi.org/10.1016/j.cell.2019.04.015 chicago: Marhavá, Petra, Lukas Hörmayer, Saiko Yoshida, Peter Marhavý, Eva Benková, and Jiří Friml. “Re-Activation of Stem Cell Pathways for Pattern Restoration in Plant Wound Healing.” Cell. Elsevier, 2019. https://doi.org/10.1016/j.cell.2019.04.015. ieee: P. Marhavá, L. Hörmayer, S. Yoshida, P. Marhavý, E. Benková, and J. Friml, “Re-activation of stem cell pathways for pattern restoration in plant wound healing,” Cell, vol. 177, no. 4. Elsevier, p. 957–969.e13, 2019. ista: Marhavá P, Hörmayer L, Yoshida S, Marhavý P, Benková E, Friml J. 2019. Re-activation of stem cell pathways for pattern restoration in plant wound healing. Cell. 177(4), 957–969.e13. mla: Marhavá, Petra, et al. “Re-Activation of Stem Cell Pathways for Pattern Restoration in Plant Wound Healing.” Cell, vol. 177, no. 4, Elsevier, 2019, p. 957–969.e13, doi:10.1016/j.cell.2019.04.015. short: P. Marhavá, L. Hörmayer, S. Yoshida, P. Marhavý, E. Benková, J. Friml, Cell 177 (2019) 957–969.e13. date_created: 2019-04-28T21:59:14Z date_published: 2019-05-02T00:00:00Z date_updated: 2024-03-27T23:30:10Z day: '02' ddc: - '570' department: - _id: JiFr - _id: EvBe doi: 10.1016/j.cell.2019.04.015 ec_funded: 1 external_id: isi: - '000466843000015' pmid: - '31051107' file: - access_level: open_access checksum: 4ceba04a96a74f5092ec3ce2c579a0c7 content_type: application/pdf creator: dernst date_created: 2019-05-13T06:12:45Z date_updated: 2020-07-14T12:47:28Z file_id: '6411' file_name: 2019_Cell_Marhava.pdf file_size: 10272032 relation: main_file file_date_updated: 2020-07-14T12:47:28Z has_accepted_license: '1' intvolume: ' 177' isi: 1 issue: '4' language: - iso: eng month: '05' oa: 1 oa_version: Published Version page: 957-969.e13 pmid: 1 project: - _id: 261099A6-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '742985' name: Tracing Evolution of Auxin Transport and Polarity in Plants publication: Cell publication_identifier: eissn: - '10974172' issn: - '00928674' publication_status: published publisher: Elsevier quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/specialized-plant-cells-regain-stem-cell-features-to-heal-wounds/ record: - id: '9992' relation: dissertation_contains status: public scopus_import: '1' status: public title: Re-activation of stem cell pathways for pattern restoration in plant wound healing tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 177 year: '2019' ... --- _id: '6943' abstract: - lang: eng text: Plants as sessile organisms are constantly under attack by herbivores, rough environmental situations, or mechanical pressure. These challenges often lead to the induction of wounds or destruction of already specified and developed tissues. Additionally, wounding makes plants vulnerable to invasion by pathogens, which is why wound signalling often triggers specific defence responses. To stay competitive or, eventually, survive under these circumstances, plants need to regenerate efficiently, which in rigid, tissue migration-incompatible plant tissues requires post-embryonic patterning and organogenesis. Now, several studies used laser-assisted single cell ablation in the Arabidopsis root tip as a minimal wounding proxy. Here, we discuss their findings and put them into context of a broader spectrum of wound signalling, pathogen responses and tissue as well as organ regeneration. article_processing_charge: No article_type: original author: - first_name: Lukas full_name: Hörmayer, Lukas id: 2EEE7A2A-F248-11E8-B48F-1D18A9856A87 last_name: Hörmayer orcid: 0000-0001-8295-2926 - first_name: Jiří full_name: Friml, Jiří id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 citation: ama: Hörmayer L, Friml J. Targeted cell ablation-based insights into wound healing and restorative patterning. Current Opinion in Plant Biology. 2019;52:124-130. doi:10.1016/j.pbi.2019.08.006 apa: Hörmayer, L., & Friml, J. (2019). Targeted cell ablation-based insights into wound healing and restorative patterning. Current Opinion in Plant Biology. Elsevier. https://doi.org/10.1016/j.pbi.2019.08.006 chicago: Hörmayer, Lukas, and Jiří Friml. “Targeted Cell Ablation-Based Insights into Wound Healing and Restorative Patterning.” Current Opinion in Plant Biology. Elsevier, 2019. https://doi.org/10.1016/j.pbi.2019.08.006. ieee: L. Hörmayer and J. Friml, “Targeted cell ablation-based insights into wound healing and restorative patterning,” Current Opinion in Plant Biology, vol. 52. Elsevier, pp. 124–130, 2019. ista: Hörmayer L, Friml J. 2019. Targeted cell ablation-based insights into wound healing and restorative patterning. Current Opinion in Plant Biology. 52, 124–130. mla: Hörmayer, Lukas, and Jiří Friml. “Targeted Cell Ablation-Based Insights into Wound Healing and Restorative Patterning.” Current Opinion in Plant Biology, vol. 52, Elsevier, 2019, pp. 124–30, doi:10.1016/j.pbi.2019.08.006. short: L. Hörmayer, J. Friml, Current Opinion in Plant Biology 52 (2019) 124–130. date_created: 2019-10-14T07:00:24Z date_published: 2019-12-01T00:00:00Z date_updated: 2024-03-27T23:30:11Z day: '01' ddc: - '580' department: - _id: JiFr doi: 10.1016/j.pbi.2019.08.006 ec_funded: 1 external_id: isi: - '000502890600017' pmid: - '31585333' file: - access_level: open_access checksum: d6fd68a6e965f1efe3f0bf2d2070a616 content_type: application/pdf creator: dernst date_created: 2019-10-14T14:48:21Z date_updated: 2020-07-14T12:47:45Z file_id: '6946' file_name: 2019_CurrentOpinionPlant_Hoermayer.pdf file_size: 1659288 relation: main_file file_date_updated: 2020-07-14T12:47:45Z has_accepted_license: '1' intvolume: ' 52' isi: 1 language: - iso: eng month: '12' oa: 1 oa_version: Published Version page: 124-130 pmid: 1 project: - _id: 261099A6-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '742985' name: Tracing Evolution of Auxin Transport and Polarity in Plants publication: Current Opinion in Plant Biology publication_identifier: issn: - 1369-5266 publication_status: published publisher: Elsevier quality_controlled: '1' related_material: record: - id: '9992' relation: dissertation_contains status: public scopus_import: '1' status: public title: Targeted cell ablation-based insights into wound healing and restorative patterning tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 52 year: '2019' ... --- _id: '7391' abstract: - lang: eng text: Electron microscopy (EM) is a technology that enables visualization of single proteins at a nanometer resolution. However, current protein analysis by EM mainly relies on immunolabeling with gold-particle-conjugated antibodies, which is compromised by large size of antibody, precluding precise detection of protein location in biological samples. Here, we develop a specific chemical labeling method for EM detection of proteins at single-molecular level. Rational design of α-helical peptide tag and probe structure provided a complementary reaction pair that enabled specific cysteine conjugation of the tag. The developed chemical labeling with gold-nanoparticle-conjugated probe showed significantly higher labeling efficiency and detectability of high-density clusters of tag-fused G protein-coupled receptors in freeze-fracture replicas compared with immunogold labeling. Furthermore, in ultrathin sections, the spatial resolution of the chemical labeling was significantly higher than that of antibody-mediated labeling. These results demonstrate substantial advantages of the chemical labeling approach for single protein visualization by EM. article_processing_charge: No article_type: original author: - first_name: Shigekazu full_name: Tabata, Shigekazu id: 4427179E-F248-11E8-B48F-1D18A9856A87 last_name: Tabata - first_name: Marijo full_name: Jevtic, Marijo id: 4BE3BC94-F248-11E8-B48F-1D18A9856A87 last_name: Jevtic - first_name: Nobutaka full_name: Kurashige, Nobutaka last_name: Kurashige - first_name: Hirokazu full_name: Fuchida, Hirokazu last_name: Fuchida - first_name: Munetsugu full_name: Kido, Munetsugu last_name: Kido - first_name: Kazushi full_name: Tani, Kazushi last_name: Tani - first_name: Naoki full_name: Zenmyo, Naoki last_name: Zenmyo - first_name: Shohei full_name: Uchinomiya, Shohei last_name: Uchinomiya - first_name: Harumi full_name: Harada, Harumi id: 2E55CDF2-F248-11E8-B48F-1D18A9856A87 last_name: Harada orcid: 0000-0001-7429-7896 - first_name: Makoto full_name: Itakura, Makoto last_name: Itakura - first_name: Itaru full_name: Hamachi, Itaru last_name: Hamachi - first_name: Ryuichi full_name: Shigemoto, Ryuichi id: 499F3ABC-F248-11E8-B48F-1D18A9856A87 last_name: Shigemoto orcid: 0000-0001-8761-9444 - first_name: Akio full_name: Ojida, Akio last_name: Ojida citation: ama: Tabata S, Jevtic M, Kurashige N, et al. Electron microscopic detection of single membrane proteins by a specific chemical labeling. iScience. 2019;22(12):256-268. doi:10.1016/j.isci.2019.11.025 apa: Tabata, S., Jevtic, M., Kurashige, N., Fuchida, H., Kido, M., Tani, K., … Ojida, A. (2019). Electron microscopic detection of single membrane proteins by a specific chemical labeling. IScience. Elsevier. https://doi.org/10.1016/j.isci.2019.11.025 chicago: Tabata, Shigekazu, Marijo Jevtic, Nobutaka Kurashige, Hirokazu Fuchida, Munetsugu Kido, Kazushi Tani, Naoki Zenmyo, et al. “Electron Microscopic Detection of Single Membrane Proteins by a Specific Chemical Labeling.” IScience. Elsevier, 2019. https://doi.org/10.1016/j.isci.2019.11.025. ieee: S. Tabata et al., “Electron microscopic detection of single membrane proteins by a specific chemical labeling,” iScience, vol. 22, no. 12. Elsevier, pp. 256–268, 2019. ista: Tabata S, Jevtic M, Kurashige N, Fuchida H, Kido M, Tani K, Zenmyo N, Uchinomiya S, Harada H, Itakura M, Hamachi I, Shigemoto R, Ojida A. 2019. Electron microscopic detection of single membrane proteins by a specific chemical labeling. iScience. 22(12), 256–268. mla: Tabata, Shigekazu, et al. “Electron Microscopic Detection of Single Membrane Proteins by a Specific Chemical Labeling.” IScience, vol. 22, no. 12, Elsevier, 2019, pp. 256–68, doi:10.1016/j.isci.2019.11.025. short: S. Tabata, M. Jevtic, N. Kurashige, H. Fuchida, M. Kido, K. Tani, N. Zenmyo, S. Uchinomiya, H. Harada, M. Itakura, I. Hamachi, R. Shigemoto, A. Ojida, IScience 22 (2019) 256–268. date_created: 2020-01-29T15:56:56Z date_published: 2019-12-20T00:00:00Z date_updated: 2024-03-27T23:30:13Z day: '20' ddc: - '570' department: - _id: RySh doi: 10.1016/j.isci.2019.11.025 ec_funded: 1 external_id: isi: - :000504652000020 pmid: - '31786521' file: - access_level: open_access checksum: f3e90056a49f09b205b1c4f8c739ffd1 content_type: application/pdf creator: dernst date_created: 2020-02-04T10:48:36Z date_updated: 2020-07-14T12:47:57Z file_id: '7448' file_name: 2019_iScience_Tabata.pdf file_size: 7197776 relation: main_file file_date_updated: 2020-07-14T12:47:57Z has_accepted_license: '1' intvolume: ' 22' issue: '12' language: - iso: eng month: '12' oa: 1 oa_version: Published Version page: 256-268 pmid: 1 project: - _id: 25CA28EA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '694539' name: 'In situ analysis of single channel subunit composition in neurons: physiological implication in synaptic plasticity and behaviour' - _id: 25CBA828-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '720270' name: Human Brain Project Specific Grant Agreement 1 (HBP SGA 1) publication: iScience publication_identifier: issn: - 2589-0042 publication_status: published publisher: Elsevier quality_controlled: '1' related_material: record: - id: '11393' relation: dissertation_contains status: public scopus_import: '1' status: public title: Electron microscopic detection of single membrane proteins by a specific chemical labeling tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 22 year: '2019' ... --- _id: '6848' abstract: - lang: eng text: Proton-translocating transhydrogenase (also known as nicotinamide nucleotide transhydrogenase (NNT)) is found in the plasma membranes of bacteria and the inner mitochondrial membranes of eukaryotes. NNT catalyses the transfer of a hydride between NADH and NADP+, coupled to the translocation of one proton across the membrane. Its main physiological function is the generation of NADPH, which is a substrate in anabolic reactions and a regulator of oxidative status; however, NNT may also fine-tune the Krebs cycle1,2. NNT deficiency causes familial glucocorticoid deficiency in humans and metabolic abnormalities in mice, similar to those observed in type II diabetes3,4. The catalytic mechanism of NNT has been proposed to involve a rotation of around 180° of the entire NADP(H)-binding domain that alternately participates in hydride transfer and proton-channel gating. However, owing to the lack of high-resolution structures of intact NNT, the details of this process remain unclear5,6. Here we present the cryo-electron microscopy structure of intact mammalian NNT in different conformational states. We show how the NADP(H)-binding domain opens the proton channel to the opposite sides of the membrane, and we provide structures of these two states. We also describe the catalytically important interfaces and linkers between the membrane and the soluble domains and their roles in nucleotide exchange. These structures enable us to propose a revised mechanism for a coupling process in NNT that is consistent with a large body of previous biochemical work. Our results are relevant to the development of currently unavailable NNT inhibitors, which may have therapeutic potential in ischaemia reperfusion injury, metabolic syndrome and some cancers7,8,9. acknowledged_ssus: - _id: ScienComp acknowledgement: " We thank R. Thompson, G. Effantin and V.-V. Hodirnau for their assistance with collecting NADP+, NADPH and apo datasets, respectively. Data processing was performed at the IST high-performance computing cluster.\r\nThis project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement no. 665385." article_processing_charge: No article_type: letter_note author: - first_name: Domen full_name: Kampjut, Domen id: 37233050-F248-11E8-B48F-1D18A9856A87 last_name: Kampjut - first_name: Leonid A full_name: Sazanov, Leonid A id: 338D39FE-F248-11E8-B48F-1D18A9856A87 last_name: Sazanov orcid: 0000-0002-0977-7989 citation: ama: Kampjut D, Sazanov LA. Structure and mechanism of mitochondrial proton-translocating transhydrogenase. Nature. 2019;573(7773):291–295. doi:10.1038/s41586-019-1519-2 apa: Kampjut, D., & Sazanov, L. A. (2019). Structure and mechanism of mitochondrial proton-translocating transhydrogenase. Nature. Springer Nature. https://doi.org/10.1038/s41586-019-1519-2 chicago: Kampjut, Domen, and Leonid A Sazanov. “Structure and Mechanism of Mitochondrial Proton-Translocating Transhydrogenase.” Nature. Springer Nature, 2019. https://doi.org/10.1038/s41586-019-1519-2. ieee: D. Kampjut and L. A. Sazanov, “Structure and mechanism of mitochondrial proton-translocating transhydrogenase,” Nature, vol. 573, no. 7773. Springer Nature, pp. 291–295, 2019. ista: Kampjut D, Sazanov LA. 2019. Structure and mechanism of mitochondrial proton-translocating transhydrogenase. Nature. 573(7773), 291–295. mla: Kampjut, Domen, and Leonid A. Sazanov. “Structure and Mechanism of Mitochondrial Proton-Translocating Transhydrogenase.” Nature, vol. 573, no. 7773, Springer Nature, 2019, pp. 291–295, doi:10.1038/s41586-019-1519-2. short: D. Kampjut, L.A. Sazanov, Nature 573 (2019) 291–295. date_created: 2019-09-04T06:21:41Z date_published: 2019-09-12T00:00:00Z date_updated: 2024-03-27T23:30:14Z day: '12' ddc: - '572' department: - _id: LeSa doi: 10.1038/s41586-019-1519-2 ec_funded: 1 external_id: isi: - '000485415400061' pmid: - '31462775' file: - access_level: open_access checksum: 52728cda5210a3e9b74cc204e8aed3d5 content_type: application/pdf creator: lsazanov date_created: 2020-11-26T16:33:44Z date_updated: 2020-11-26T16:33:44Z file_id: '8821' file_name: Manuscript_final_acc_withFigs_SI_opt_red.pdf file_size: 3066206 relation: main_file success: 1 file_date_updated: 2020-11-26T16:33:44Z has_accepted_license: '1' intvolume: ' 573' isi: 1 issue: '7773' language: - iso: eng month: '09' oa: 1 oa_version: Submitted Version page: 291–295 pmid: 1 project: - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program publication: Nature publication_identifier: eissn: - 1476-4687 issn: - 0028-0836 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: link: - description: News on IST Website relation: press_release url: https://ist.ac.at/en/news/high-end-microscopy-reveals-structure-and-function-of-crucial-metabolic-enzyme/ record: - id: '8340' relation: dissertation_contains status: public scopus_import: '1' status: public title: Structure and mechanism of mitochondrial proton-translocating transhydrogenase type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 573 year: '2019' ... --- _id: '6194' abstract: - lang: eng text: Grid cells with their rigid hexagonal firing fields are thought to provide an invariant metric to the hippocampal cognitive map, yet environmental geometrical features have recently been shown to distort the grid structure. Given that the hippocampal role goes beyond space, we tested the influence of nonspatial information on the grid organization. We trained rats to daily learn three new reward locations on a cheeseboard maze while recording from the medial entorhinal cortex and the hippocampal CA1 region. Many grid fields moved toward goal location, leading to long-lasting deformations of the entorhinal map. Therefore, distortions in the grid structure contribute to goal representation during both learning and recall, which demonstrates that grid cells participate in mnemonic coding and do not merely provide a simple metric of space. article_processing_charge: No article_type: original author: - first_name: Charlotte N. full_name: Boccara, Charlotte N. id: 3FC06552-F248-11E8-B48F-1D18A9856A87 last_name: Boccara orcid: 0000-0001-7237-5109 - first_name: Michele full_name: Nardin, Michele id: 30BD0376-F248-11E8-B48F-1D18A9856A87 last_name: Nardin orcid: 0000-0001-8849-6570 - first_name: Federico full_name: Stella, Federico id: 39AF1E74-F248-11E8-B48F-1D18A9856A87 last_name: Stella orcid: 0000-0001-9439-3148 - first_name: Joseph full_name: O'Neill, Joseph id: 426376DC-F248-11E8-B48F-1D18A9856A87 last_name: O'Neill - first_name: Jozsef L full_name: Csicsvari, Jozsef L id: 3FA14672-F248-11E8-B48F-1D18A9856A87 last_name: Csicsvari orcid: 0000-0002-5193-4036 citation: ama: Boccara CN, Nardin M, Stella F, O’Neill J, Csicsvari JL. The entorhinal cognitive map is attracted to goals. Science. 2019;363(6434):1443-1447. doi:10.1126/science.aav4837 apa: Boccara, C. N., Nardin, M., Stella, F., O’Neill, J., & Csicsvari, J. L. (2019). The entorhinal cognitive map is attracted to goals. Science. American Association for the Advancement of Science. https://doi.org/10.1126/science.aav4837 chicago: Boccara, Charlotte N., Michele Nardin, Federico Stella, Joseph O’Neill, and Jozsef L Csicsvari. “The Entorhinal Cognitive Map Is Attracted to Goals.” Science. American Association for the Advancement of Science, 2019. https://doi.org/10.1126/science.aav4837. ieee: C. N. Boccara, M. Nardin, F. Stella, J. O’Neill, and J. L. Csicsvari, “The entorhinal cognitive map is attracted to goals,” Science, vol. 363, no. 6434. American Association for the Advancement of Science, pp. 1443–1447, 2019. ista: Boccara CN, Nardin M, Stella F, O’Neill J, Csicsvari JL. 2019. The entorhinal cognitive map is attracted to goals. Science. 363(6434), 1443–1447. mla: Boccara, Charlotte N., et al. “The Entorhinal Cognitive Map Is Attracted to Goals.” Science, vol. 363, no. 6434, American Association for the Advancement of Science, 2019, pp. 1443–47, doi:10.1126/science.aav4837. short: C.N. Boccara, M. Nardin, F. Stella, J. O’Neill, J.L. Csicsvari, Science 363 (2019) 1443–1447. date_created: 2019-04-04T08:39:30Z date_published: 2019-03-29T00:00:00Z date_updated: 2024-03-27T23:30:16Z day: '29' ddc: - '570' department: - _id: JoCs doi: 10.1126/science.aav4837 ec_funded: 1 external_id: isi: - '000462738000034' file: - access_level: open_access checksum: 5e6b16742cde10a560cfaf2130764da1 content_type: application/pdf creator: dernst date_created: 2020-05-14T09:11:10Z date_updated: 2020-07-14T12:47:23Z file_id: '7826' file_name: 2019_Science_Boccara.pdf file_size: 9045923 relation: main_file file_date_updated: 2020-07-14T12:47:23Z has_accepted_license: '1' intvolume: ' 363' isi: 1 issue: '6434' language: - iso: eng month: '03' oa: 1 oa_version: Submitted Version page: 1443-1447 project: - _id: 257A4776-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '281511' name: Memory-related information processing in neuronal circuits of the hippocampus and entorhinal cortex - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program publication: Science publication_identifier: eissn: - 1095-9203 issn: - 0036-8075 publication_status: published publisher: American Association for the Advancement of Science quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/grid-cells-create-treasure-map-in-rat-brain/ record: - id: '6062' relation: popular_science status: public - id: '11932' relation: dissertation_contains status: public scopus_import: '1' status: public title: The entorhinal cognitive map is attracted to goals type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 363 year: '2019' ... --- _id: '7132' abstract: - lang: eng text: "A major challenge in neuroscience research is to dissect the circuits that orchestrate behavior in health and disease. Proteins from a wide range of non-mammalian species, such as microbial opsins, have been successfully transplanted to specific neuronal targets to override their natural communication patterns. The goal of our work is to manipulate synaptic communication in a manner that closely incorporates the functional intricacies of synapses by preserving temporal encoding (i.e. the firing pattern of the presynaptic neuron) and connectivity (i.e. target specific synapses rather than specific neurons). Our strategy to achieve this goal builds on the use of non-mammalian transplants to create a synthetic synapse. The mode of modulation comes from pre-synaptic uptake of a synthetic neurotransmitter (SN) into synaptic vesicles by means of a genetically targeted transporter selective for the SN. Upon natural vesicular release, exposure of the SN to the synaptic cleft will modify the post-synaptic potential through an orthogonal ligand gated ion channel. To achieve this goal we have functionally characterized a mixed cationic methionine-gated ion channel from Arabidopsis thaliana, designed a method to functionally characterize a synthetic transporter in isolated synaptic vesicles without the need for transgenic animals, identified and extracted multiple prokaryotic uptake systems that are substrate specific for methionine (Met), and established a primary/cell line co-culture system that would allow future combinatorial testing of this orthogonal transmitter-transporter-channel trifecta.\r\nSynthetic synapses will provide a unique opportunity to manipulate synaptic communication while maintaining the electrophysiological integrity of the pre-synaptic cell. In this way, information may be preserved that was generated in upstream circuits and that could be essential for concerted function and information processing." alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Catherine full_name: Mckenzie, Catherine id: 3EEDE19A-F248-11E8-B48F-1D18A9856A87 last_name: Mckenzie citation: ama: Mckenzie C. Design and characterization of methods and biological components to realize synthetic neurotransmission. 2019. doi:10.15479/at:ista:7132 apa: Mckenzie, C. (2019). Design and characterization of methods and biological components to realize synthetic neurotransmission. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:7132 chicago: Mckenzie, Catherine. “Design and Characterization of Methods and Biological Components to Realize Synthetic Neurotransmission.” Institute of Science and Technology Austria, 2019. https://doi.org/10.15479/at:ista:7132. ieee: C. Mckenzie, “Design and characterization of methods and biological components to realize synthetic neurotransmission,” Institute of Science and Technology Austria, 2019. ista: Mckenzie C. 2019. Design and characterization of methods and biological components to realize synthetic neurotransmission. Institute of Science and Technology Austria. mla: Mckenzie, Catherine. Design and Characterization of Methods and Biological Components to Realize Synthetic Neurotransmission. Institute of Science and Technology Austria, 2019, doi:10.15479/at:ista:7132. short: C. Mckenzie, Design and Characterization of Methods and Biological Components to Realize Synthetic Neurotransmission, Institute of Science and Technology Austria, 2019. date_created: 2019-11-27T09:07:14Z date_published: 2019-06-27T00:00:00Z date_updated: 2024-03-27T23:30:21Z day: '27' ddc: - '571' - '573' degree_awarded: PhD department: - _id: HaJa doi: 10.15479/at:ista:7132 file: - access_level: closed checksum: 34d0fe0f6e0af97b5937205a3e350423 content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: dernst date_created: 2019-11-27T09:06:10Z date_updated: 2020-07-14T12:47:50Z file_id: '7133' file_name: McKenzie PhD Thesis August 2018 - Corrected Final.docx file_size: 5054633 relation: source_file - access_level: open_access checksum: 140dfb5e3df7edca34f4b6fcc55d876f content_type: application/pdf creator: dernst date_created: 2019-11-27T09:06:10Z date_updated: 2020-07-14T12:47:50Z file_id: '7134' file_name: McKenzie PhD Thesis August 2018 - Corrected Final.pdf file_size: 3231837 relation: main_file file_date_updated: 2020-07-14T12:47:50Z has_accepted_license: '1' language: - iso: eng month: '06' oa: 1 oa_version: Published Version page: '95' publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '6266' relation: old_edition status: public status: public supervisor: - first_name: Harald L full_name: Janovjak, Harald L id: 33BA6C30-F248-11E8-B48F-1D18A9856A87 last_name: Janovjak orcid: 0000-0002-8023-9315 title: Design and characterization of methods and biological components to realize synthetic neurotransmission type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2019' ... --- _id: '5949' abstract: - lang: eng text: Aberrant proteostasis of protein aggregation may lead to behavior disorders including chronic mental illnesses (CMI). Furthermore, the neuronal activity alterations that underlie CMI are not well understood. We recorded the local field potential and single-unit activity of the hippocampal CA1 region in vivo in rats transgenically overexpressing the Disrupted-in-Schizophrenia 1 (DISC1) gene (tgDISC1), modeling sporadic CMI. These tgDISC1 rats have previously been shown to exhibit DISC1 protein aggregation, disturbances in the dopaminergic system and attention-related deficits. Recordings were performed during exploration of familiar and novel open field environments and during sleep, allowing investigation of neuronal abnormalities in unconstrained behavior. Compared to controls, tgDISC1 place cells exhibited smaller place fields and decreased speed-modulation of their firing rates, demonstrating altered spatial coding and deficits in encoding location-independent sensory inputs. Oscillation analyses showed that tgDISC1 pyramidal neurons had higher theta phase locking strength during novelty, limiting their phase coding ability. However, their mean theta phases were more variable at the population level, reducing oscillatory network synchronization. Finally, tgDISC1 pyramidal neurons showed a lack of novelty-induced shift in their preferred theta and gamma firing phases, indicating deficits in coding of novel environments with oscillatory firing. By combining single cell and neuronal population analyses, we link DISC1 protein pathology with abnormal hippocampal neural coding and network synchrony, and thereby gain a more comprehensive understanding of CMI mechanisms. article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Karola full_name: Käfer, Karola id: 2DAA49AA-F248-11E8-B48F-1D18A9856A87 last_name: Käfer - first_name: Hugo full_name: Malagon-Vina, Hugo last_name: Malagon-Vina - first_name: Desiree full_name: Dickerson, Desiree id: 444EB89E-F248-11E8-B48F-1D18A9856A87 last_name: Dickerson - first_name: Joseph full_name: O'Neill, Joseph last_name: O'Neill - first_name: Svenja V. full_name: Trossbach, Svenja V. last_name: Trossbach - first_name: Carsten full_name: Korth, Carsten last_name: Korth - first_name: Jozsef L full_name: Csicsvari, Jozsef L id: 3FA14672-F248-11E8-B48F-1D18A9856A87 last_name: Csicsvari orcid: 0000-0002-5193-4036 citation: ama: Käfer K, Malagon-Vina H, Dickerson D, et al. Disrupted-in-schizophrenia 1 overexpression disrupts hippocampal coding and oscillatory synchronization. Hippocampus. 2019;29(9):802-816. doi:10.1002/hipo.23076 apa: Käfer, K., Malagon-Vina, H., Dickerson, D., O’Neill, J., Trossbach, S. V., Korth, C., & Csicsvari, J. L. (2019). Disrupted-in-schizophrenia 1 overexpression disrupts hippocampal coding and oscillatory synchronization. Hippocampus. Wiley. https://doi.org/10.1002/hipo.23076 chicago: Käfer, Karola, Hugo Malagon-Vina, Desiree Dickerson, Joseph O’Neill, Svenja V. Trossbach, Carsten Korth, and Jozsef L Csicsvari. “Disrupted-in-Schizophrenia 1 Overexpression Disrupts Hippocampal Coding and Oscillatory Synchronization.” Hippocampus. Wiley, 2019. https://doi.org/10.1002/hipo.23076. ieee: K. Käfer et al., “Disrupted-in-schizophrenia 1 overexpression disrupts hippocampal coding and oscillatory synchronization,” Hippocampus, vol. 29, no. 9. Wiley, pp. 802–816, 2019. ista: Käfer K, Malagon-Vina H, Dickerson D, O’Neill J, Trossbach SV, Korth C, Csicsvari JL. 2019. Disrupted-in-schizophrenia 1 overexpression disrupts hippocampal coding and oscillatory synchronization. Hippocampus. 29(9), 802–816. mla: Käfer, Karola, et al. “Disrupted-in-Schizophrenia 1 Overexpression Disrupts Hippocampal Coding and Oscillatory Synchronization.” Hippocampus, vol. 29, no. 9, Wiley, 2019, pp. 802–16, doi:10.1002/hipo.23076. short: K. Käfer, H. Malagon-Vina, D. Dickerson, J. O’Neill, S.V. Trossbach, C. Korth, J.L. Csicsvari, Hippocampus 29 (2019) 802–816. date_created: 2019-02-10T22:59:18Z date_published: 2019-09-01T00:00:00Z date_updated: 2024-03-27T23:30:22Z day: '01' ddc: - '570' department: - _id: JoCs doi: 10.1002/hipo.23076 ec_funded: 1 external_id: isi: - '000480635400003' file: - access_level: open_access checksum: 5e8de271ca04aef92a5de42d6aac4404 content_type: application/pdf creator: dernst date_created: 2019-02-11T10:42:51Z date_updated: 2020-07-14T12:47:13Z file_id: '5950' file_name: 2019_Hippocampus_Kaefer.pdf file_size: 2132893 relation: main_file file_date_updated: 2020-07-14T12:47:13Z has_accepted_license: '1' intvolume: ' 29' isi: 1 issue: '9' language: - iso: eng month: '09' oa: 1 oa_version: Published Version page: 802-816 project: - _id: 257BBB4C-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '607616' name: Inter-and intracellular signalling in schizophrenia publication: Hippocampus publication_status: published publisher: Wiley quality_controlled: '1' related_material: record: - id: '6825' relation: dissertation_contains status: public scopus_import: '1' status: public title: Disrupted-in-schizophrenia 1 overexpression disrupts hippocampal coding and oscillatory synchronization tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 29 year: '2019' ... --- _id: '6825' abstract: - lang: eng text: "The solving of complex tasks requires the functions of more than one brain area and their interaction. Whilst spatial navigation and memory is dependent on the hippocampus, flexible behavior relies on the medial prefrontal cortex (mPFC). To further examine the roles of the hippocampus and mPFC, we recorded their neural activity during a task that depends on both of these brain regions.\r\nWith tetrodes, we recorded the extracellular activity of dorsal hippocampal CA1 (HPC) and mPFC neurons in Long-Evans rats performing a rule-switching task on the plus-maze. The plus-maze task had a spatial component since it required navigation along one of the two start arms and at the maze center a choice between one of the two goal arms. Which goal contained a reward depended on the rule currently in place. After an uncued rule change the animal had to abandon the old strategy and switch to the new rule, testing cognitive flexibility. Investigating the coordination of activity between the HPC and mPFC allows determination during which task stages their interaction is required. Additionally, comparing neural activity patterns in these two brain regions allows delineation of the specialized functions of the HPC and mPFC in this task. We analyzed neural activity in the HPC and mPFC in terms of oscillatory interactions, rule coding and replay.\r\nWe found that theta coherence between the HPC and mPFC is increased at the center and goals of the maze, both when the rule was stable or has changed. Similar results were found for locking of HPC and mPFC neurons to HPC theta oscillations. However, no differences in HPC-mPFC theta coordination were observed between the spatially- and cue-guided rule. Phase locking of HPC and mPFC neurons to HPC gamma oscillations was not modulated by\r\nmaze position or rule type. We found that the HPC coded for the two different rules with cofiring relationships between\r\ncell pairs. However, we could not find conclusive evidence for rule coding in the mPFC. Spatially-selective firing in the mPFC generalized between the two start and two goal arms. With Bayesian positional decoding, we found that the mPFC reactivated non-local positions during awake immobility periods. Replay of these non-local positions could represent entire behavioral trajectories resembling trajectory replay of the HPC. Furthermore, mPFC\r\ntrajectory-replay at the goal positively correlated with rule-switching performance. \r\nFinally, HPC and mPFC trajectory replay occurred independently of each other. These results show that the mPFC can replay ordered patterns of activity during awake immobility, possibly underlying its role in flexible behavior. " alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Karola full_name: Käfer, Karola id: 2DAA49AA-F248-11E8-B48F-1D18A9856A87 last_name: Käfer citation: ama: Käfer K. The hippocampus and medial prefrontal cortex during flexible behavior. 2019. doi:10.15479/AT:ISTA:6825 apa: Käfer, K. (2019). The hippocampus and medial prefrontal cortex during flexible behavior. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:6825 chicago: Käfer, Karola. “The Hippocampus and Medial Prefrontal Cortex during Flexible Behavior.” Institute of Science and Technology Austria, 2019. https://doi.org/10.15479/AT:ISTA:6825. ieee: K. Käfer, “The hippocampus and medial prefrontal cortex during flexible behavior,” Institute of Science and Technology Austria, 2019. ista: Käfer K. 2019. The hippocampus and medial prefrontal cortex during flexible behavior. Institute of Science and Technology Austria. mla: Käfer, Karola. The Hippocampus and Medial Prefrontal Cortex during Flexible Behavior. Institute of Science and Technology Austria, 2019, doi:10.15479/AT:ISTA:6825. short: K. Käfer, The Hippocampus and Medial Prefrontal Cortex during Flexible Behavior, Institute of Science and Technology Austria, 2019. date_created: 2019-08-21T15:00:57Z date_published: 2019-08-24T00:00:00Z date_updated: 2023-09-07T13:01:42Z day: '24' ddc: - '570' degree_awarded: PhD department: - _id: JoCs doi: 10.15479/AT:ISTA:6825 file: - access_level: open_access checksum: 2664420e332a33338568f4f3bfc59287 content_type: application/pdf creator: kkaefer date_created: 2019-09-03T08:07:13Z date_updated: 2020-09-06T22:30:03Z embargo: 2020-09-05 file_id: '6846' file_name: Thesis_Kaefer_PDFA.pdf file_size: 3205202 relation: main_file request_a_copy: 0 - access_level: closed checksum: 9a154eab6f07aa590a3d2651dc0d926a content_type: application/zip creator: kkaefer date_created: 2019-09-03T08:07:17Z date_updated: 2020-09-15T22:30:05Z embargo_to: open_access file_id: '6847' file_name: Thesis_Kaefer.zip file_size: 2506835 relation: main_file file_date_updated: 2020-09-15T22:30:05Z has_accepted_license: '1' language: - iso: eng month: '08' oa: 1 oa_version: Published Version page: '89' publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '5949' relation: part_of_dissertation status: public status: public supervisor: - first_name: Jozsef L full_name: Csicsvari, Jozsef L id: 3FA14672-F248-11E8-B48F-1D18A9856A87 last_name: Csicsvari orcid: 0000-0002-5193-4036 title: The hippocampus and medial prefrontal cortex during flexible behavior type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2019' ... --- _id: '6713' abstract: - lang: eng text: Evolutionary studies are often limited by missing data that are critical to understanding the history of selection. Selection experiments, which reproduce rapid evolution under controlled conditions, are excellent tools to study how genomes evolve under selection. Here we present a genomic dissection of the Longshanks selection experiment, in which mice were selectively bred over 20 generations for longer tibiae relative to body mass, resulting in 13% longer tibiae in two replicates. We synthesized evolutionary theory, genome sequences and molecular genetics to understand the selection response and found that it involved both polygenic adaptation and discrete loci of major effect, with the strongest loci tending to be selected in parallel between replicates. We show that selection may favor de-repression of bone growth through inactivating two limb enhancers of an inhibitor, Nkx3-2. Our integrative genomic analyses thus show that it is possible to connect individual base-pair changes to the overall selection response. article_number: e42014 article_processing_charge: No author: - first_name: João Pl full_name: Castro, João Pl last_name: Castro - first_name: Michelle N. full_name: Yancoskie, Michelle N. last_name: Yancoskie - first_name: Marta full_name: Marchini, Marta last_name: Marchini - first_name: Stefanie full_name: Belohlavy, Stefanie id: 43FE426A-F248-11E8-B48F-1D18A9856A87 last_name: Belohlavy orcid: 0000-0002-9849-498X - first_name: Layla full_name: Hiramatsu, Layla last_name: Hiramatsu - first_name: Marek full_name: Kučka, Marek last_name: Kučka - first_name: William H. full_name: Beluch, William H. last_name: Beluch - first_name: Ronald full_name: Naumann, Ronald last_name: Naumann - first_name: Isabella full_name: Skuplik, Isabella last_name: Skuplik - first_name: John full_name: Cobb, John last_name: Cobb - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 - first_name: Campbell full_name: Rolian, Campbell last_name: Rolian - first_name: Yingguang Frank full_name: Chan, Yingguang Frank last_name: Chan citation: ama: Castro JP, Yancoskie MN, Marchini M, et al. An integrative genomic analysis of the Longshanks selection experiment for longer limbs in mice. eLife. 2019;8. doi:10.7554/eLife.42014 apa: Castro, J. P., Yancoskie, M. N., Marchini, M., Belohlavy, S., Hiramatsu, L., Kučka, M., … Chan, Y. F. (2019). An integrative genomic analysis of the Longshanks selection experiment for longer limbs in mice. ELife. eLife Sciences Publications. https://doi.org/10.7554/eLife.42014 chicago: Castro, João Pl, Michelle N. Yancoskie, Marta Marchini, Stefanie Belohlavy, Layla Hiramatsu, Marek Kučka, William H. Beluch, et al. “An Integrative Genomic Analysis of the Longshanks Selection Experiment for Longer Limbs in Mice.” ELife. eLife Sciences Publications, 2019. https://doi.org/10.7554/eLife.42014. ieee: J. P. Castro et al., “An integrative genomic analysis of the Longshanks selection experiment for longer limbs in mice,” eLife, vol. 8. eLife Sciences Publications, 2019. ista: Castro JP, Yancoskie MN, Marchini M, Belohlavy S, Hiramatsu L, Kučka M, Beluch WH, Naumann R, Skuplik I, Cobb J, Barton NH, Rolian C, Chan YF. 2019. An integrative genomic analysis of the Longshanks selection experiment for longer limbs in mice. eLife. 8, e42014. mla: Castro, João Pl, et al. “An Integrative Genomic Analysis of the Longshanks Selection Experiment for Longer Limbs in Mice.” ELife, vol. 8, e42014, eLife Sciences Publications, 2019, doi:10.7554/eLife.42014. short: J.P. Castro, M.N. Yancoskie, M. Marchini, S. Belohlavy, L. Hiramatsu, M. Kučka, W.H. Beluch, R. Naumann, I. Skuplik, J. Cobb, N.H. Barton, C. Rolian, Y.F. Chan, ELife 8 (2019). date_created: 2019-07-28T21:59:17Z date_published: 2019-06-06T00:00:00Z date_updated: 2024-03-27T23:30:22Z day: '06' ddc: - '576' department: - _id: NiBa doi: 10.7554/eLife.42014 external_id: isi: - '000473588700001' pmid: - '31169497' file: - access_level: open_access checksum: fa0936fe58f0d9e3f8e75038570e5a17 content_type: application/pdf creator: apreinsp date_created: 2019-07-29T07:41:18Z date_updated: 2020-07-14T12:47:38Z file_id: '6721' file_name: 2019_eLife_Castro.pdf file_size: 6748249 relation: main_file file_date_updated: 2020-07-14T12:47:38Z has_accepted_license: '1' intvolume: ' 8' isi: 1 language: - iso: eng month: '06' oa: 1 oa_version: Published Version pmid: 1 publication: eLife publication_status: published publisher: eLife Sciences Publications quality_controlled: '1' related_material: record: - id: '9804' relation: research_data status: public - id: '11388' relation: dissertation_contains status: public scopus_import: '1' status: public title: An integrative genomic analysis of the Longshanks selection experiment for longer limbs in mice tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 8 year: '2019' ... --- _id: '10065' abstract: - lang: eng text: We study double quantum dots in a Ge/SiGe heterostructure and test their maturity towards singlet-triplet ($S-T_0$) qubits. We demonstrate a large range of tunability, from two single quantum dots to a double quantum dot. We measure Pauli spin blockade and study the anisotropy of the $g$-factor. We use an adjacent quantum dot for sensing charge transitions in the double quantum dot at interest. In conclusion, Ge/SiGe possesses all ingredients necessary for building a singlet-triplet qubit. acknowledged_ssus: - _id: M-Shop - _id: NanoFab acknowledgement: "We thank Matthias Brauns for helpful discussions and careful proofreading of the manuscript. This project has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No 844511 and from the FWF project P30207. The research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA machine shop and the nanofabrication\r\nfacility." article_number: '1910.05841' article_processing_charge: No author: - first_name: Andrea C full_name: Hofmann, Andrea C id: 340F461A-F248-11E8-B48F-1D18A9856A87 last_name: Hofmann - first_name: Daniel full_name: Jirovec, Daniel id: 4C473F58-F248-11E8-B48F-1D18A9856A87 last_name: Jirovec orcid: 0000-0002-7197-4801 - first_name: Maxim full_name: Borovkov, Maxim last_name: Borovkov - first_name: Ivan full_name: Prieto Gonzalez, Ivan id: 2A307FE2-F248-11E8-B48F-1D18A9856A87 last_name: Prieto Gonzalez orcid: 0000-0002-7370-5357 - first_name: Andrea full_name: Ballabio, Andrea last_name: Ballabio - first_name: Jacopo full_name: Frigerio, Jacopo last_name: Frigerio - first_name: Daniel full_name: Chrastina, Daniel last_name: Chrastina - first_name: Giovanni full_name: Isella, Giovanni last_name: Isella - first_name: Georgios full_name: Katsaros, Georgios id: 38DB5788-F248-11E8-B48F-1D18A9856A87 last_name: Katsaros orcid: 0000-0001-8342-202X citation: ama: Hofmann AC, Jirovec D, Borovkov M, et al. Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits. arXiv. doi:10.48550/arXiv.1910.05841 apa: Hofmann, A. C., Jirovec, D., Borovkov, M., Prieto Gonzalez, I., Ballabio, A., Frigerio, J., … Katsaros, G. (n.d.). Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits. arXiv. https://doi.org/10.48550/arXiv.1910.05841 chicago: Hofmann, Andrea C, Daniel Jirovec, Maxim Borovkov, Ivan Prieto Gonzalez, Andrea Ballabio, Jacopo Frigerio, Daniel Chrastina, Giovanni Isella, and Georgios Katsaros. “Assessing the Potential of Ge/SiGe Quantum Dots as Hosts for Singlet-Triplet Qubits.” ArXiv, n.d. https://doi.org/10.48550/arXiv.1910.05841. ieee: A. C. Hofmann et al., “Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits,” arXiv. . ista: Hofmann AC, Jirovec D, Borovkov M, Prieto Gonzalez I, Ballabio A, Frigerio J, Chrastina D, Isella G, Katsaros G. Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits. arXiv, 1910.05841. mla: Hofmann, Andrea C., et al. “Assessing the Potential of Ge/SiGe Quantum Dots as Hosts for Singlet-Triplet Qubits.” ArXiv, 1910.05841, doi:10.48550/arXiv.1910.05841. short: A.C. Hofmann, D. Jirovec, M. Borovkov, I. Prieto Gonzalez, A. Ballabio, J. Frigerio, D. Chrastina, G. Isella, G. Katsaros, ArXiv (n.d.). date_created: 2021-10-01T12:14:51Z date_published: 2019-10-13T00:00:00Z date_updated: 2024-03-27T23:30:26Z day: '13' department: - _id: GeKa doi: 10.48550/arXiv.1910.05841 ec_funded: 1 external_id: arxiv: - '1910.05841' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1910.05841 month: '10' oa: 1 oa_version: Preprint project: - _id: 26A151DA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '844511' name: Majorana bound states in Ge/SiGe heterostructures - _id: 2641CE5E-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P30207 name: Hole spin orbit qubits in Ge quantum wells publication: arXiv publication_status: submitted related_material: record: - id: '10058' relation: dissertation_contains status: public status: public title: Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet qubits type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2019' ... --- _id: '6187' abstract: - lang: eng text: Aberrant display of the truncated core1 O-glycan T-antigen is a common feature of human cancer cells that correlates with metastasis. Here we show that T-antigen in Drosophila melanogaster macrophages is involved in their developmentally programmed tissue invasion. Higher macrophage T-antigen levels require an atypical major facilitator superfamily (MFS) member that we named Minerva which enables macrophage dissemination and invasion. We characterize for the first time the T and Tn glycoform O-glycoproteome of the Drosophila melanogaster embryo, and determine that Minerva increases the presence of T-antigen on proteins in pathways previously linked to cancer, most strongly on the sulfhydryl oxidase Qsox1 which we show is required for macrophage tissue entry. Minerva’s vertebrate ortholog, MFSD1, rescues the minerva mutant’s migration and T-antigen glycosylation defects. We thus identify a key conserved regulator that orchestrates O-glycosylation on a protein subset to activate a program governing migration steps important for both development and cancer metastasis. acknowledged_ssus: - _id: LifeSc article_number: e41801 article_processing_charge: No author: - first_name: Katarina full_name: Valosková, Katarina id: 46F146FC-F248-11E8-B48F-1D18A9856A87 last_name: Valosková - first_name: Julia full_name: Biebl, Julia id: 3CCBB46E-F248-11E8-B48F-1D18A9856A87 last_name: Biebl - first_name: Marko full_name: Roblek, Marko id: 3047D808-F248-11E8-B48F-1D18A9856A87 last_name: Roblek orcid: 0000-0001-9588-1389 - first_name: Shamsi full_name: Emtenani, Shamsi id: 49D32318-F248-11E8-B48F-1D18A9856A87 last_name: Emtenani orcid: 0000-0001-6981-6938 - first_name: Attila full_name: György, Attila id: 3BCEDBE0-F248-11E8-B48F-1D18A9856A87 last_name: György orcid: 0000-0002-1819-198X - first_name: Michaela full_name: Misova, Michaela id: 495A3C32-F248-11E8-B48F-1D18A9856A87 last_name: Misova orcid: 0000-0003-2427-6856 - first_name: Aparna full_name: Ratheesh, Aparna id: 2F064CFE-F248-11E8-B48F-1D18A9856A87 last_name: Ratheesh orcid: 0000-0001-7190-0776 - first_name: Patricia full_name: Rodrigues, Patricia id: 2CE4065A-F248-11E8-B48F-1D18A9856A87 last_name: Rodrigues - first_name: Katerina full_name: Shkarina, Katerina last_name: Shkarina - first_name: Ida Signe Bohse full_name: Larsen, Ida Signe Bohse last_name: Larsen - first_name: Sergey Y full_name: Vakhrushev, Sergey Y last_name: Vakhrushev - first_name: Henrik full_name: Clausen, Henrik last_name: Clausen - first_name: Daria E full_name: Siekhaus, Daria E id: 3D224B9E-F248-11E8-B48F-1D18A9856A87 last_name: Siekhaus orcid: 0000-0001-8323-8353 citation: ama: Valosková K, Bicher J, Roblek M, et al. A conserved major facilitator superfamily member orchestrates a subset of O-glycosylation to aid macrophage tissue invasion. eLife. 2019;8. doi:10.7554/elife.41801 apa: Valosková, K., Bicher, J., Roblek, M., Emtenani, S., György, A., Misova, M., … Siekhaus, D. E. (2019). A conserved major facilitator superfamily member orchestrates a subset of O-glycosylation to aid macrophage tissue invasion. ELife. eLife Sciences Publications. https://doi.org/10.7554/elife.41801 chicago: Valosková, Katarina, Julia Bicher, Marko Roblek, Shamsi Emtenani, Attila György, Michaela Misova, Aparna Ratheesh, et al. “A Conserved Major Facilitator Superfamily Member Orchestrates a Subset of O-Glycosylation to Aid Macrophage Tissue Invasion.” ELife. eLife Sciences Publications, 2019. https://doi.org/10.7554/elife.41801. ieee: K. Valosková et al., “A conserved major facilitator superfamily member orchestrates a subset of O-glycosylation to aid macrophage tissue invasion,” eLife, vol. 8. eLife Sciences Publications, 2019. ista: Valosková K, Bicher J, Roblek M, Emtenani S, György A, Misova M, Ratheesh A, Rodrigues P, Shkarina K, Larsen ISB, Vakhrushev SY, Clausen H, Siekhaus DE. 2019. A conserved major facilitator superfamily member orchestrates a subset of O-glycosylation to aid macrophage tissue invasion. eLife. 8, e41801. mla: Valosková, Katarina, et al. “A Conserved Major Facilitator Superfamily Member Orchestrates a Subset of O-Glycosylation to Aid Macrophage Tissue Invasion.” ELife, vol. 8, e41801, eLife Sciences Publications, 2019, doi:10.7554/elife.41801. short: K. Valosková, J. Bicher, M. Roblek, S. Emtenani, A. György, M. Misova, A. Ratheesh, P. Rodrigues, K. Shkarina, I.S.B. Larsen, S.Y. Vakhrushev, H. Clausen, D.E. Siekhaus, ELife 8 (2019). date_created: 2019-03-28T13:37:45Z date_published: 2019-03-26T00:00:00Z date_updated: 2024-03-27T23:30:29Z day: '26' ddc: - '570' department: - _id: DaSi doi: 10.7554/elife.41801 ec_funded: 1 external_id: isi: - '000462530200001' file: - access_level: open_access checksum: cc0d1a512559d52e7e7cb0e9b9854b40 content_type: application/pdf creator: dernst date_created: 2019-03-28T14:00:41Z date_updated: 2020-07-14T12:47:23Z file_id: '6188' file_name: 2019_eLife_Valoskova.pdf file_size: 4496017 relation: main_file file_date_updated: 2020-07-14T12:47:23Z has_accepted_license: '1' intvolume: ' 8' isi: 1 language: - iso: eng month: '03' oa: 1 oa_version: Published Version project: - _id: 253CDE40-B435-11E9-9278-68D0E5697425 grant_number: '24283' name: Examination of the role of a MFS transporter in the migration of Drosophila immune cells - _id: 253B6E48-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P29638 name: The role of Drosophila TNF alpha in immune cell invasion - _id: 2536F660-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '334077' name: Investigating the role of transporters in invasive migration through junctions - _id: 25388084-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '329540' name: 'Breaking barriers: Investigating the junctional and mechanobiological changes underlying the ability of Drosophila immune cells to invade an epithelium' - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program publication: eLife publication_identifier: issn: - 2050-084X publication_status: published publisher: eLife Sciences Publications quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/new-gene-potentially-involved-in-metastasis-identified/ record: - id: '6530' relation: dissertation_contains - id: '8983' relation: dissertation_contains status: public - id: '6546' relation: dissertation_contains status: public scopus_import: '1' status: public title: A conserved major facilitator superfamily member orchestrates a subset of O-glycosylation to aid macrophage tissue invasion tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 8 year: '2019' ... --- _id: '6546' abstract: - lang: eng text: "Invasive migration plays a crucial role not only during development and homeostasis but also in pathological states, such as tumor metastasis. Drosophila macrophage migration into the extended germband is an interesting system to study invasive migration. It carries similarities to immune cell transmigration and cancer cell invasion, therefore studying this process could also bring new understanding of invasion in higher organisms. In our work, we uncover a highly conserved member of the major facilitator family that plays a role in tissue invasion through regulation of glycosylation on a subgroup of proteins and/or by aiding the precise timing of DN-Cadherin downregulation. \r\n\r\nAberrant display of the truncated core1 O-glycan T-antigen is a common feature of human cancer cells that correlates with metastasis. Here we show that T-antigen in Drosophila melanogaster macrophages is involved in their developmentally programmed tissue invasion. Higher macrophage T-antigen levels require an atypical major facilitator superfamily (MFS) member that we named Minerva which enables macrophage dissemination and invasion. We characterize for the first time the T and Tn glycoform O-glycoproteome of the Drosophila melanogaster embryo, and determine that Minerva increases the presence of T-antigen on proteins in pathways previously linked to cancer, most strongly on the sulfhydryl oxidase Qsox1 which we show is required for macrophage tissue entry. Minerva’s vertebrate ortholog, MFSD1, rescues the minerva mutant’s migration and T-antigen glycosylation defects. We thus identify \r\na key conserved regulator that orchestrates O-glycosylation on a protein subset to activate \r\na program governing migration steps important for both development and cancer metastasis. \r\n" acknowledged_ssus: - _id: Bio alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Katarina full_name: Valosková, Katarina id: 46F146FC-F248-11E8-B48F-1D18A9856A87 last_name: Valosková citation: ama: Valosková K. The role of a highly conserved major facilitator superfamily member in Drosophila embryonic macrophage migration. 2019. doi:10.15479/AT:ISTA:6546 apa: Valosková, K. (2019). The role of a highly conserved major facilitator superfamily member in Drosophila embryonic macrophage migration. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:6546 chicago: Valosková, Katarina. “The Role of a Highly Conserved Major Facilitator Superfamily Member in Drosophila Embryonic Macrophage Migration.” Institute of Science and Technology Austria, 2019. https://doi.org/10.15479/AT:ISTA:6546. ieee: K. Valosková, “The role of a highly conserved major facilitator superfamily member in Drosophila embryonic macrophage migration,” Institute of Science and Technology Austria, 2019. ista: Valosková K. 2019. The role of a highly conserved major facilitator superfamily member in Drosophila embryonic macrophage migration. Institute of Science and Technology Austria. mla: Valosková, Katarina. The Role of a Highly Conserved Major Facilitator Superfamily Member in Drosophila Embryonic Macrophage Migration. Institute of Science and Technology Austria, 2019, doi:10.15479/AT:ISTA:6546. short: K. Valosková, The Role of a Highly Conserved Major Facilitator Superfamily Member in Drosophila Embryonic Macrophage Migration, Institute of Science and Technology Austria, 2019. date_created: 2019-06-07T12:49:19Z date_published: 2019-06-07T00:00:00Z date_updated: 2023-09-19T10:15:54Z day: '07' ddc: - '570' degree_awarded: PhD department: - _id: DaSi doi: 10.15479/AT:ISTA:6546 file: - access_level: closed checksum: 68949c2d96210b45b981a23e9c9cd93c content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: khribikova date_created: 2019-06-07T13:00:04Z date_updated: 2020-07-14T12:47:33Z embargo_to: open_access file_id: '6549' file_name: Katarina Valoskova_PhD thesis_final version.docx file_size: 14110626 relation: source_file - access_level: open_access checksum: 555329cd76e196c96f5278c480ee2e6e content_type: application/pdf creator: khribikova date_created: 2019-06-07T13:00:08Z date_updated: 2021-02-11T11:17:14Z embargo: 2020-06-07 file_id: '6550' file_name: Katarina Valoskova_PhD thesis_final version.pdf file_size: 10054156 relation: main_file file_date_updated: 2021-02-11T11:17:14Z has_accepted_license: '1' language: - iso: eng month: '06' oa: 1 oa_version: Published Version page: '141' project: - _id: 253CDE40-B435-11E9-9278-68D0E5697425 grant_number: '24283' name: Examination of the role of a MFS transporter in the migration of Drosophila immune cells publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '6187' relation: part_of_dissertation status: public - id: '544' relation: part_of_dissertation status: public status: public supervisor: - first_name: Daria E full_name: Siekhaus, Daria E id: 3D224B9E-F248-11E8-B48F-1D18A9856A87 last_name: Siekhaus orcid: 0000-0001-8323-8353 title: The role of a highly conserved major facilitator superfamily member in Drosophila embryonic macrophage migration type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2019' ... --- _id: '6363' abstract: - lang: eng text: "Distinguishing between similar experiences is achieved by the brain \ in a process called pattern separation. In the hippocampus, pattern \ separation reduces the interference of memories and increases the storage capacity by decorrelating similar inputs patterns of neuronal activity into \ non-overlapping output firing patterns. Winners-take-all (WTA) mechanism \ is a theoretical model for pattern separation in which a \"winner\" \ cell suppresses the activity of the neighboring neurons through feedback inhibition. However, if the network properties of the dentate gyrus support WTA as a biologically conceivable model remains unknown. Here, we showed that the connectivity rules of PV+interneurons and their synaptic properties are optimizedfor efficient pattern separation. We found using multiple whole-cell in vitrorecordings that PV+interneurons mainly connect to granule cells (GC) through lateral inhibition, a form of feedback inhibition in which a GC inhibits other GCs but not \ itself through the activation of PV+interneurons. Thus, lateral inhibition between GC–PV+interneurons was ~10 times more abundant than recurrent connections. Furthermore, the GC–PV+interneuron connectivity was more spatially confined \ but less abundant than PV+interneurons–GC connectivity, leading to an \ asymmetrical distribution of excitatory and inhibitory connectivity. Our network model of the dentate gyrus with incorporated real connectivity rules efficiently decorrelates neuronal activity patterns using WTA as the primary mechanism. \ This process relied on lateral inhibition, fast-signaling properties of \ PV+interneurons and the asymmetrical distribution of excitatory and inhibitory connectivity. Finally, we found that silencing the activity of PV+interneurons in vivoleads to acute deficits in discrimination between similar environments, suggesting that PV+interneuron networks are necessary for behavioral relevant computations. Our results demonstrate that PV+interneurons possess unique connectivity and fast signaling properties that confer to the dentate \ gyrus network properties that allow the emergence of pattern separation. Thus, our results contribute to the knowledge of how specific forms of network organization underlie sophisticated types of information processing. \r\n" alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: 'Claudia ' full_name: 'Espinoza Martinez, Claudia ' id: 31FFEE2E-F248-11E8-B48F-1D18A9856A87 last_name: Espinoza Martinez orcid: 0000-0003-4710-2082 citation: ama: Espinoza Martinez C. Parvalbumin+ interneurons enable efficient pattern separation in hippocampal microcircuits. 2019. doi:10.15479/AT:ISTA:6363 apa: Espinoza Martinez, C. (2019). Parvalbumin+ interneurons enable efficient pattern separation in hippocampal microcircuits. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:6363 chicago: Espinoza Martinez, Claudia . “Parvalbumin+ Interneurons Enable Efficient Pattern Separation in Hippocampal Microcircuits.” Institute of Science and Technology Austria, 2019. https://doi.org/10.15479/AT:ISTA:6363. ieee: C. Espinoza Martinez, “Parvalbumin+ interneurons enable efficient pattern separation in hippocampal microcircuits,” Institute of Science and Technology Austria, 2019. ista: Espinoza Martinez C. 2019. Parvalbumin+ interneurons enable efficient pattern separation in hippocampal microcircuits. Institute of Science and Technology Austria. mla: Espinoza Martinez, Claudia. Parvalbumin+ Interneurons Enable Efficient Pattern Separation in Hippocampal Microcircuits. Institute of Science and Technology Austria, 2019, doi:10.15479/AT:ISTA:6363. short: C. Espinoza Martinez, Parvalbumin+ Interneurons Enable Efficient Pattern Separation in Hippocampal Microcircuits, Institute of Science and Technology Austria, 2019. date_created: 2019-04-30T11:56:10Z date_published: 2019-04-30T00:00:00Z date_updated: 2023-09-15T12:03:48Z day: '30' ddc: - '570' degree_awarded: PhD department: - _id: PeJo doi: 10.15479/AT:ISTA:6363 file: - access_level: open_access checksum: 77c6c05cfe8b58c8abcf1b854375d084 content_type: application/pdf creator: cespinoza date_created: 2019-05-07T16:00:39Z date_updated: 2021-02-11T11:17:15Z embargo: 2020-05-09 file_id: '6389' file_name: Espinozathesis_all2.pdf file_size: 13966891 relation: main_file - access_level: closed checksum: f6aa819f127691a2b0fc21c76eb09746 content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: cespinoza date_created: 2019-05-07T16:00:48Z date_updated: 2020-07-14T12:47:28Z embargo_to: open_access file_id: '6390' file_name: Espinoza_Thesis.docx file_size: 11159900 relation: source_file file_date_updated: 2021-02-11T11:17:15Z has_accepted_license: '1' language: - iso: eng month: '04' oa: 1 oa_version: Published Version page: '140' publication_identifier: isbn: - 978-3-99078-000-8 issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '21' relation: part_of_dissertation status: public status: public supervisor: - first_name: Peter M full_name: Jonas, Peter M id: 353C1B58-F248-11E8-B48F-1D18A9856A87 last_name: Jonas orcid: 0000-0001-5001-4804 title: Parvalbumin+ interneurons enable efficient pattern separation in hippocampal microcircuits type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2019' ... --- _id: '6780' abstract: - lang: eng text: "In this work, we consider the almost-sure termination problem for probabilistic programs that asks whether a\r\ngiven probabilistic program terminates with probability 1. Scalable approaches for program analysis often\r\nrely on modularity as their theoretical basis. In non-probabilistic programs, the classical variant rule (V-rule)\r\nof Floyd-Hoare logic provides the foundation for modular analysis. Extension of this rule to almost-sure\r\ntermination of probabilistic programs is quite tricky, and a probabilistic variant was proposed in [16]. While the\r\nproposed probabilistic variant cautiously addresses the key issue of integrability, we show that the proposed\r\nmodular rule is still not sound for almost-sure termination of probabilistic programs.\r\nBesides establishing unsoundness of the previous rule, our contributions are as follows: First, we present a\r\nsound modular rule for almost-sure termination of probabilistic programs. Our approach is based on a novel\r\nnotion of descent supermartingales. Second, for algorithmic approaches, we consider descent supermartingales\r\nthat are linear and show that they can be synthesized in polynomial time. Finally, we present experimental\r\nresults on a variety of benchmarks and several natural examples that model various types of nested while\r\nloops in probabilistic programs and demonstrate that our approach is able to efficiently prove their almost-sure\r\ntermination property" article_number: '129' article_processing_charge: No author: - first_name: Mingzhang full_name: Huang, Mingzhang last_name: Huang - first_name: Hongfei full_name: Fu, Hongfei last_name: Fu - first_name: Krishnendu full_name: Chatterjee, Krishnendu id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87 last_name: Chatterjee orcid: 0000-0002-4561-241X - first_name: Amir Kafshdar full_name: Goharshady, Amir Kafshdar id: 391365CE-F248-11E8-B48F-1D18A9856A87 last_name: Goharshady orcid: 0000-0003-1702-6584 citation: ama: 'Huang M, Fu H, Chatterjee K, Goharshady AK. Modular verification for almost-sure termination of probabilistic programs. In: Proceedings of the 34th ACM International Conference on Object-Oriented Programming, Systems, Languages, and Applications . Vol 3. ACM; 2019. doi:10.1145/3360555' apa: 'Huang, M., Fu, H., Chatterjee, K., & Goharshady, A. K. (2019). Modular verification for almost-sure termination of probabilistic programs. In Proceedings of the 34th ACM International Conference on Object-Oriented Programming, Systems, Languages, and Applications (Vol. 3). Athens, Greece: ACM. https://doi.org/10.1145/3360555' chicago: Huang, Mingzhang, Hongfei Fu, Krishnendu Chatterjee, and Amir Kafshdar Goharshady. “Modular Verification for Almost-Sure Termination of Probabilistic Programs.” In Proceedings of the 34th ACM International Conference on Object-Oriented Programming, Systems, Languages, and Applications , Vol. 3. ACM, 2019. https://doi.org/10.1145/3360555. ieee: M. Huang, H. Fu, K. Chatterjee, and A. K. Goharshady, “Modular verification for almost-sure termination of probabilistic programs,” in Proceedings of the 34th ACM International Conference on Object-Oriented Programming, Systems, Languages, and Applications , Athens, Greece, 2019, vol. 3. ista: 'Huang M, Fu H, Chatterjee K, Goharshady AK. 2019. Modular verification for almost-sure termination of probabilistic programs. Proceedings of the 34th ACM International Conference on Object-Oriented Programming, Systems, Languages, and Applications . OOPSLA: Object-oriented Programming, Systems, Languages and Applications vol. 3, 129.' mla: Huang, Mingzhang, et al. “Modular Verification for Almost-Sure Termination of Probabilistic Programs.” Proceedings of the 34th ACM International Conference on Object-Oriented Programming, Systems, Languages, and Applications , vol. 3, 129, ACM, 2019, doi:10.1145/3360555. short: M. Huang, H. Fu, K. Chatterjee, A.K. Goharshady, in:, Proceedings of the 34th ACM International Conference on Object-Oriented Programming, Systems, Languages, and Applications , ACM, 2019. conference: end_date: 2019-10-25 location: Athens, Greece name: 'OOPSLA: Object-oriented Programming, Systems, Languages and Applications' start_date: 2019-10-23 date_created: 2019-08-09T09:54:20Z date_published: 2019-10-01T00:00:00Z date_updated: 2024-03-27T23:30:33Z day: '01' ddc: - '000' department: - _id: KrCh doi: 10.1145/3360555 ec_funded: 1 external_id: arxiv: - '1901.06087' file: - access_level: open_access checksum: 3482d8ace6fb4991eb7810e3b70f1b9f content_type: application/pdf creator: akafshda date_created: 2019-08-12T15:40:57Z date_updated: 2020-07-14T12:47:40Z file_id: '6807' file_name: oopsla-2019.pdf file_size: 1024643 relation: main_file - access_level: open_access checksum: 4e5a6fb2b59a75222a4e8335a5a60eac content_type: application/pdf creator: dernst date_created: 2020-05-12T15:15:14Z date_updated: 2020-07-14T12:47:40Z file_id: '7821' file_name: 2019_ACM_Huang.pdf file_size: 538579 relation: main_file file_date_updated: 2020-07-14T12:47:40Z has_accepted_license: '1' intvolume: ' 3' language: - iso: eng month: '10' oa: 1 oa_version: Published Version project: - _id: 25892FC0-B435-11E9-9278-68D0E5697425 grant_number: ICT15-003 name: Efficient Algorithms for Computer Aided Verification - _id: 25863FF4-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S11407 name: Game Theory - _id: 2581B60A-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '279307' name: 'Quantitative Graph Games: Theory and Applications' - _id: 267066CE-B435-11E9-9278-68D0E5697425 name: Quantitative Analysis of Probablistic Systems with a focus on Crypto-currencies - _id: 266EEEC0-B435-11E9-9278-68D0E5697425 name: Quantitative Game-theoretic Analysis of Blockchain Applications and Smart Contracts publication: 'Proceedings of the 34th ACM International Conference on Object-Oriented Programming, Systems, Languages, and Applications ' publication_status: published publisher: ACM quality_controlled: '1' related_material: record: - id: '8934' relation: dissertation_contains status: public status: public title: Modular verification for almost-sure termination of probabilistic programs tmp: image: /images/cc_by_nc.png legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) short: CC BY-NC (4.0) type: conference user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 3 year: '2019' ... --- _id: '6380' abstract: - lang: eng text: 'There is a huge gap between the speeds of modern caches and main memories, and therefore cache misses account for a considerable loss of efficiency in programs. The predominant technique to address this issue has been Data Packing: data elements that are frequently accessed within time proximity are packed into the same cache block, thereby minimizing accesses to the main memory. We consider the algorithmic problem of Data Packing on a two-level memory system. Given a reference sequence R of accesses to data elements, the task is to partition the elements into cache blocks such that the number of cache misses on R is minimized. The problem is notoriously difficult: it is NP-hard even when the cache has size 1, and is hard to approximate for any cache size larger than 4. Therefore, all existing techniques for Data Packing are based on heuristics and lack theoretical guarantees. In this work, we present the first positive theoretical results for Data Packing, along with new and stronger negative results. We consider the problem under the lens of the underlying access hypergraphs, which are hypergraphs of affinities between the data elements, where the order of an access hypergraph corresponds to the size of the affinity group. We study the problem parameterized by the treewidth of access hypergraphs, which is a standard notion in graph theory to measure the closeness of a graph to a tree. Our main results are as follows: We show there is a number q* depending on the cache parameters such that (a) if the access hypergraph of order q* has constant treewidth, then there is a linear-time algorithm for Data Packing; (b)the Data Packing problem remains NP-hard even if the access hypergraph of order q*-1 has constant treewidth. Thus, we establish a fine-grained dichotomy depending on a single parameter, namely, the highest order among access hypegraphs that have constant treewidth; and establish the optimal value q* of this parameter. Finally, we present an experimental evaluation of a prototype implementation of our algorithm. Our results demonstrate that, in practice, access hypergraphs of many commonly-used algorithms have small treewidth. We compare our approach with several state-of-the-art heuristic-based algorithms and show that our algorithm leads to significantly fewer cache-misses. ' article_number: '53' author: - first_name: Krishnendu full_name: Chatterjee, Krishnendu id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87 last_name: Chatterjee orcid: 0000-0002-4561-241X - first_name: Amir Kafshdar full_name: Goharshady, Amir Kafshdar id: 391365CE-F248-11E8-B48F-1D18A9856A87 last_name: Goharshady orcid: 0000-0003-1702-6584 - first_name: Nastaran full_name: Okati, Nastaran last_name: Okati - first_name: Andreas full_name: Pavlogiannis, Andreas id: 49704004-F248-11E8-B48F-1D18A9856A87 last_name: Pavlogiannis orcid: 0000-0002-8943-0722 citation: ama: Chatterjee K, Goharshady AK, Okati N, Pavlogiannis A. Efficient parameterized algorithms for data packing. Proceedings of the ACM on Programming Languages. 2019;3(POPL). doi:10.1145/3290366 apa: Chatterjee, K., Goharshady, A. K., Okati, N., & Pavlogiannis, A. (2019). Efficient parameterized algorithms for data packing. Proceedings of the ACM on Programming Languages. ACM. https://doi.org/10.1145/3290366 chicago: Chatterjee, Krishnendu, Amir Kafshdar Goharshady, Nastaran Okati, and Andreas Pavlogiannis. “Efficient Parameterized Algorithms for Data Packing.” Proceedings of the ACM on Programming Languages. ACM, 2019. https://doi.org/10.1145/3290366. ieee: K. Chatterjee, A. K. Goharshady, N. Okati, and A. Pavlogiannis, “Efficient parameterized algorithms for data packing,” Proceedings of the ACM on Programming Languages, vol. 3, no. POPL. ACM, 2019. ista: Chatterjee K, Goharshady AK, Okati N, Pavlogiannis A. 2019. Efficient parameterized algorithms for data packing. Proceedings of the ACM on Programming Languages. 3(POPL), 53. mla: Chatterjee, Krishnendu, et al. “Efficient Parameterized Algorithms for Data Packing.” Proceedings of the ACM on Programming Languages, vol. 3, no. POPL, 53, ACM, 2019, doi:10.1145/3290366. short: K. Chatterjee, A.K. Goharshady, N. Okati, A. Pavlogiannis, Proceedings of the ACM on Programming Languages 3 (2019). date_created: 2019-05-06T12:18:17Z date_published: 2019-01-01T00:00:00Z date_updated: 2024-03-27T23:30:33Z day: '01' ddc: - '004' department: - _id: KrCh doi: 10.1145/3290366 ec_funded: 1 file: - access_level: open_access checksum: c157752f96877b36685ad7063ada4524 content_type: application/pdf creator: dernst date_created: 2019-05-06T12:23:11Z date_updated: 2020-07-14T12:47:29Z file_id: '6381' file_name: 2019_ACM_POPL_Chatterjee.pdf file_size: 1294962 relation: main_file file_date_updated: 2020-07-14T12:47:29Z has_accepted_license: '1' intvolume: ' 3' issue: POPL language: - iso: eng month: '01' oa: 1 oa_version: Published Version project: - _id: 25892FC0-B435-11E9-9278-68D0E5697425 grant_number: ICT15-003 name: Efficient Algorithms for Computer Aided Verification - _id: 25832EC2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S 11407_N23 name: Rigorous Systems Engineering - _id: 2581B60A-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '279307' name: 'Quantitative Graph Games: Theory and Applications' publication: Proceedings of the ACM on Programming Languages publication_identifier: issn: - 2475-1421 publication_status: published publisher: ACM pubrep_id: '1056' quality_controlled: '1' related_material: record: - id: '8934' relation: dissertation_contains status: public status: public title: Efficient parameterized algorithms for data packing tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 3 year: '2019' ... --- _id: '6056' abstract: - lang: eng text: In today's programmable blockchains, smart contracts are limited to being deterministic and non-probabilistic. This lack of randomness is a consequential limitation, given that a wide variety of real-world financial contracts, such as casino games and lotteries, depend entirely on randomness. As a result, several ad-hoc random number generation approaches have been developed to be used in smart contracts. These include ideas such as using an oracle or relying on the block hash. However, these approaches are manipulatable, i.e. their output can be tampered with by parties who might not be neutral, such as the owner of the oracle or the miners.We propose a novel game-theoretic approach for generating provably unmanipulatable pseudorandom numbers on the blockchain. Our approach allows smart contracts to access a trustworthy source of randomness that does not rely on potentially compromised miners or oracles, hence enabling the creation of a new generation of smart contracts that are not limited to being non-probabilistic and can be drawn from the much more general class of probabilistic programs. article_number: '8751326' author: - first_name: Krishnendu full_name: Chatterjee, Krishnendu id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87 last_name: Chatterjee orcid: 0000-0002-4561-241X - first_name: Amir Kafshdar full_name: Goharshady, Amir Kafshdar id: 391365CE-F248-11E8-B48F-1D18A9856A87 last_name: Goharshady orcid: 0000-0003-1702-6584 - first_name: Arash full_name: Pourdamghani, Arash last_name: Pourdamghani citation: ama: 'Chatterjee K, Goharshady AK, Pourdamghani A. Probabilistic smart contracts: Secure randomness on the blockchain. In: IEEE International Conference on Blockchain and Cryptocurrency. IEEE; 2019. doi:10.1109/BLOC.2019.8751326' apa: 'Chatterjee, K., Goharshady, A. K., & Pourdamghani, A. (2019). Probabilistic smart contracts: Secure randomness on the blockchain. In IEEE International Conference on Blockchain and Cryptocurrency. Seoul, Korea: IEEE. https://doi.org/10.1109/BLOC.2019.8751326' chicago: 'Chatterjee, Krishnendu, Amir Kafshdar Goharshady, and Arash Pourdamghani. “Probabilistic Smart Contracts: Secure Randomness on the Blockchain.” In IEEE International Conference on Blockchain and Cryptocurrency. IEEE, 2019. https://doi.org/10.1109/BLOC.2019.8751326.' ieee: 'K. Chatterjee, A. K. Goharshady, and A. Pourdamghani, “Probabilistic smart contracts: Secure randomness on the blockchain,” in IEEE International Conference on Blockchain and Cryptocurrency, Seoul, Korea, 2019.' ista: 'Chatterjee K, Goharshady AK, Pourdamghani A. 2019. Probabilistic smart contracts: Secure randomness on the blockchain. IEEE International Conference on Blockchain and Cryptocurrency. IEEE International Conference on Blockchain and Cryptocurrency, 8751326.' mla: 'Chatterjee, Krishnendu, et al. “Probabilistic Smart Contracts: Secure Randomness on the Blockchain.” IEEE International Conference on Blockchain and Cryptocurrency, 8751326, IEEE, 2019, doi:10.1109/BLOC.2019.8751326.' short: K. Chatterjee, A.K. Goharshady, A. Pourdamghani, in:, IEEE International Conference on Blockchain and Cryptocurrency, IEEE, 2019. conference: end_date: 2019-05-17 location: Seoul, Korea name: IEEE International Conference on Blockchain and Cryptocurrency start_date: 2019-05-14 date_created: 2019-02-26T09:03:15Z date_published: 2019-05-01T00:00:00Z date_updated: 2024-03-27T23:30:33Z day: '01' department: - _id: KrCh doi: 10.1109/BLOC.2019.8751326 ec_funded: 1 external_id: arxiv: - '1902.07986' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1902.07986 month: '05' oa: 1 oa_version: Preprint project: - _id: 25892FC0-B435-11E9-9278-68D0E5697425 grant_number: ICT15-003 name: Efficient Algorithms for Computer Aided Verification - _id: 25832EC2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S 11407_N23 name: Rigorous Systems Engineering - _id: 2581B60A-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '279307' name: 'Quantitative Graph Games: Theory and Applications' - _id: 266EEEC0-B435-11E9-9278-68D0E5697425 name: Quantitative Game-theoretic Analysis of Blockchain Applications and Smart Contracts - _id: 267066CE-B435-11E9-9278-68D0E5697425 name: Quantitative Analysis of Probablistic Systems with a focus on Crypto-currencies publication: IEEE International Conference on Blockchain and Cryptocurrency publication_status: published publisher: IEEE quality_controlled: '1' related_material: record: - id: '8934' relation: dissertation_contains status: public scopus_import: 1 status: public title: 'Probabilistic smart contracts: Secure randomness on the blockchain' type: conference user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87 year: '2019' ...