--- _id: '1551' abstract: - lang: eng text: 'Reciprocal coevolution between host and pathogen is widely seen as a major driver of evolution and biological innovation. Yet, to date, the underlying genetic mechanisms and associated trait functions that are unique to rapid coevolutionary change are generally unknown. We here combined experimental evolution of the bacterial biocontrol agent Bacillus thuringiensis and its nematode host Caenorhabditis elegans with large-scale phenotyping, whole genome analysis, and functional genetics to demonstrate the selective benefit of pathogen virulence and the underlying toxin genes during the adaptation process. We show that: (i) high virulence was specifically favoured during pathogen–host coevolution rather than pathogen one-sided adaptation to a nonchanging host or to an environment without host; (ii) the pathogen genotype BT-679 with known nematocidal toxin genes and high virulence specifically swept to fixation in all of the independent replicate populations under coevolution but only some under one-sided adaptation; (iii) high virulence in the BT-679-dominated populations correlated with elevated copy numbers of the plasmid containing the nematocidal toxin genes; (iv) loss of virulence in a toxin-plasmid lacking BT-679 isolate was reconstituted by genetic reintroduction or external addition of the toxins.We conclude that sustained coevolution is distinct from unidirectional selection in shaping the pathogen''s genome and life history characteristics. To our knowledge, this study is the first to characterize the pathogen genes involved in coevolutionary adaptation in an animal host–pathogen interaction system.' acknowledgement: We are very grateful for funding from the German Science Foundation (DFG) to HS (SCHU 1415/8, SCHU 1415/9), PR (RO 2994/3), EBB (BO 2544/7), HL (LI 1690/2), AT (TE 976/2), RDS (SCHU 2522/1), JK (KU 1929/4); from the Kiel Excellence Cluster Inflammation at Interfaces to HS and PR; and from the ISTFELLOW program (Co-fund Marie Curie Actions of the European Commission) to LM. author: - first_name: Leila full_name: El Masri, Leila id: 349A6E66-F248-11E8-B48F-1D18A9856A87 last_name: El Masri - first_name: Antoine full_name: Branca, Antoine last_name: Branca - first_name: Anna full_name: Sheppard, Anna last_name: Sheppard - first_name: Andrei full_name: Papkou, Andrei last_name: Papkou - first_name: David full_name: Laehnemann, David last_name: Laehnemann - first_name: Patrick full_name: Guenther, Patrick last_name: Guenther - first_name: Swantje full_name: Prahl, Swantje last_name: Prahl - first_name: Manja full_name: Saebelfeld, Manja last_name: Saebelfeld - first_name: Jacqueline full_name: Hollensteiner, Jacqueline last_name: Hollensteiner - first_name: Heiko full_name: Liesegang, Heiko last_name: Liesegang - first_name: Elzbieta full_name: Brzuszkiewicz, Elzbieta last_name: Brzuszkiewicz - first_name: Rolf full_name: Daniel, Rolf last_name: Daniel - first_name: Nico full_name: Michiels, Nico last_name: Michiels - first_name: Rebecca full_name: Schulte, Rebecca last_name: Schulte - first_name: Joachim full_name: Kurtz, Joachim last_name: Kurtz - first_name: Philip full_name: Rosenstiel, Philip last_name: Rosenstiel - first_name: Arndt full_name: Telschow, Arndt last_name: Telschow - first_name: Erich full_name: Bornberg Bauer, Erich last_name: Bornberg Bauer - first_name: Hinrich full_name: Schulenburg, Hinrich last_name: Schulenburg citation: ama: 'El Masri L, Branca A, Sheppard A, et al. Host–pathogen coevolution: The selective advantage of Bacillus thuringiensis virulence and its cry toxin genes. PLoS Biology. 2015;13(6):1-30. doi:10.1371/journal.pbio.1002169' apa: 'El Masri, L., Branca, A., Sheppard, A., Papkou, A., Laehnemann, D., Guenther, P., … Schulenburg, H. (2015). Host–pathogen coevolution: The selective advantage of Bacillus thuringiensis virulence and its cry toxin genes. PLoS Biology. Public Library of Science. https://doi.org/10.1371/journal.pbio.1002169' chicago: 'El Masri, Leila, Antoine Branca, Anna Sheppard, Andrei Papkou, David Laehnemann, Patrick Guenther, Swantje Prahl, et al. “Host–Pathogen Coevolution: The Selective Advantage of Bacillus Thuringiensis Virulence and Its Cry Toxin Genes.” PLoS Biology. Public Library of Science, 2015. https://doi.org/10.1371/journal.pbio.1002169.' ieee: 'L. El Masri et al., “Host–pathogen coevolution: The selective advantage of Bacillus thuringiensis virulence and its cry toxin genes,” PLoS Biology, vol. 13, no. 6. Public Library of Science, pp. 1–30, 2015.' ista: 'El Masri L, Branca A, Sheppard A, Papkou A, Laehnemann D, Guenther P, Prahl S, Saebelfeld M, Hollensteiner J, Liesegang H, Brzuszkiewicz E, Daniel R, Michiels N, Schulte R, Kurtz J, Rosenstiel P, Telschow A, Bornberg Bauer E, Schulenburg H. 2015. Host–pathogen coevolution: The selective advantage of Bacillus thuringiensis virulence and its cry toxin genes. PLoS Biology. 13(6), 1–30.' mla: 'El Masri, Leila, et al. “Host–Pathogen Coevolution: The Selective Advantage of Bacillus Thuringiensis Virulence and Its Cry Toxin Genes.” PLoS Biology, vol. 13, no. 6, Public Library of Science, 2015, pp. 1–30, doi:10.1371/journal.pbio.1002169.' short: L. El Masri, A. Branca, A. Sheppard, A. Papkou, D. Laehnemann, P. Guenther, S. Prahl, M. Saebelfeld, J. Hollensteiner, H. Liesegang, E. Brzuszkiewicz, R. Daniel, N. Michiels, R. Schulte, J. Kurtz, P. Rosenstiel, A. Telschow, E. Bornberg Bauer, H. Schulenburg, PLoS Biology 13 (2015) 1–30. date_created: 2018-12-11T11:52:40Z date_published: 2015-06-04T00:00:00Z date_updated: 2021-01-12T06:51:33Z day: '04' ddc: - '570' department: - _id: SyCr doi: 10.1371/journal.pbio.1002169 ec_funded: 1 file: - access_level: open_access checksum: 30dee7a2c11ed09f2f5634655c0146f8 content_type: application/pdf creator: system date_created: 2018-12-12T10:14:13Z date_updated: 2020-07-14T12:45:02Z file_id: '5063' file_name: IST-2016-481-v1+1_journal.pbio.1002169.pdf file_size: 3468956 relation: main_file file_date_updated: 2020-07-14T12:45:02Z has_accepted_license: '1' intvolume: ' 13' issue: '6' language: - iso: eng month: '06' oa: 1 oa_version: Published Version page: 1 - 30 project: - _id: 25681D80-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '291734' name: International IST Postdoc Fellowship Programme publication: PLoS Biology publication_status: published publisher: Public Library of Science publist_id: '5620' pubrep_id: '481' quality_controlled: '1' scopus_import: 1 status: public title: 'Host–pathogen coevolution: The selective advantage of Bacillus thuringiensis virulence and its cry toxin genes' 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: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87 volume: 13 year: '2015' ... --- _id: '1998' abstract: - lang: eng text: Immune systems are able to protect the body against secondary infection with the same parasite. In insect colonies, this protection is not restricted to the level of the individual organism, but also occurs at the societal level. Here, we review recent evidence for and insights into the mechanisms underlying individual and social immunisation in insects. We disentangle general immune-protective effects from specific immune memory (priming), and examine immunisation in the context of the lifetime of an individual and that of a colony, and of transgenerational immunisation that benefits offspring. When appropriate, we discuss parallels with disease defence strategies in human societies. We propose that recurrent parasitic threats have shaped the evolution of both the individual immune systems and colony-level social immunity in insects. acknowledgement: "This work was funded by an ERC Starting Grant by the European Research Council (to S.C.) and the ISTFELLOW program (Co-fund Marie Curie Actions of the European Commission; to L.M.).\r\nWe thank Christopher D. Pull, Sophie A.O. Armitage, Hinrich Schulenburg, Line V. Ugelvig, Matthias Konrad, Matthias Fürst, Miriam Stock, Barbara Casillas-Perez and three anonymous referees for comments on the manuscript. " author: - first_name: Leila full_name: El Masri, Leila id: 349A6E66-F248-11E8-B48F-1D18A9856A87 last_name: El Masri - first_name: Sylvia full_name: Cremer, Sylvia id: 2F64EC8C-F248-11E8-B48F-1D18A9856A87 last_name: Cremer orcid: 0000-0002-2193-3868 citation: ama: El Masri L, Cremer S. Individual and social immunisation in insects. Trends in Immunology. 2014;35(10):471-482. doi:10.1016/j.it.2014.08.005 apa: El Masri, L., & Cremer, S. (2014). Individual and social immunisation in insects. Trends in Immunology. Elsevier. https://doi.org/10.1016/j.it.2014.08.005 chicago: El Masri, Leila, and Sylvia Cremer. “Individual and Social Immunisation in Insects.” Trends in Immunology. Elsevier, 2014. https://doi.org/10.1016/j.it.2014.08.005. ieee: L. El Masri and S. Cremer, “Individual and social immunisation in insects,” Trends in Immunology, vol. 35, no. 10. Elsevier, pp. 471–482, 2014. ista: El Masri L, Cremer S. 2014. Individual and social immunisation in insects. Trends in Immunology. 35(10), 471–482. mla: El Masri, Leila, and Sylvia Cremer. “Individual and Social Immunisation in Insects.” Trends in Immunology, vol. 35, no. 10, Elsevier, 2014, pp. 471–82, doi:10.1016/j.it.2014.08.005. short: L. El Masri, S. Cremer, Trends in Immunology 35 (2014) 471–482. date_created: 2018-12-11T11:55:07Z date_published: 2014-10-01T00:00:00Z date_updated: 2021-01-12T06:54:35Z day: '01' department: - _id: SyCr doi: 10.1016/j.it.2014.08.005 intvolume: ' 35' issue: '10' language: - iso: eng month: '10' oa_version: None page: 471 - 482 publication: Trends in Immunology publication_status: published publisher: Elsevier publist_id: '5081' quality_controlled: '1' scopus_import: 1 status: public title: Individual and social immunisation in insects type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 35 year: '2014' ... --- _id: '2846' abstract: - lang: eng text: The Red Queen hypothesis proposes that coevolving parasites select for outcrossing in the host. Outcrossing relies on males, which often show lower immune investment due to, for example, sexual selection. Here, we demonstrate that such sex differences in immunity interfere with parasite-mediated selection for outcrossing. Two independent coevolution experiments with Caenorhabditis elegans and its microparasite Bacillus thuringiensis produced decreased yet stable frequencies of outcrossing male hosts. A subsequent systematic analysis verified that male C. elegans suffered from a direct selective disadvantage under parasite pressure (i.e. lower resistance, decreased sexual activity, increased escape behaviour), which can reduce outcrossing and thus male frequencies. At the same time, males offered an indirect selective benefit, because male-mediated outcrossing increased offspring resistance, thus favouring male persistence in the evolving populations. As sex differences in immunity are widespread, such interference of opposing selective constraints is likely of central importance during host adaptation to a coevolving parasite. article_processing_charge: No author: - first_name: Leila full_name: El Masri, Leila id: 349A6E66-F248-11E8-B48F-1D18A9856A87 last_name: El Masri - first_name: Rebecca full_name: Schulte, Rebecca last_name: Schulte - first_name: Nadine full_name: Timmermeyer, Nadine last_name: Timmermeyer - first_name: Stefanie full_name: Thanisch, Stefanie last_name: Thanisch - first_name: Lena full_name: Crummenerl, Lena last_name: Crummenerl - first_name: Gunther full_name: Jansen, Gunther last_name: Jansen - first_name: Nico full_name: Michiels, Nico last_name: Michiels - first_name: Hinrich full_name: Schulenburg, Hinrich last_name: Schulenburg citation: ama: El Masri L, Schulte R, Timmermeyer N, et al. Sex differences in host defence interfere with parasite-mediated selection for outcrossing during host-parasite coevolution. Ecology Letters. 2013;16(4):461-468. doi:10.1111/ele.12068 apa: El Masri, L., Schulte, R., Timmermeyer, N., Thanisch, S., Crummenerl, L., Jansen, G., … Schulenburg, H. (2013). Sex differences in host defence interfere with parasite-mediated selection for outcrossing during host-parasite coevolution. Ecology Letters. Wiley-Blackwell. https://doi.org/10.1111/ele.12068 chicago: El Masri, Leila, Rebecca Schulte, Nadine Timmermeyer, Stefanie Thanisch, Lena Crummenerl, Gunther Jansen, Nico Michiels, and Hinrich Schulenburg. “Sex Differences in Host Defence Interfere with Parasite-Mediated Selection for Outcrossing during Host-Parasite Coevolution.” Ecology Letters. Wiley-Blackwell, 2013. https://doi.org/10.1111/ele.12068. ieee: L. El Masri et al., “Sex differences in host defence interfere with parasite-mediated selection for outcrossing during host-parasite coevolution,” Ecology Letters, vol. 16, no. 4. Wiley-Blackwell, pp. 461–468, 2013. ista: El Masri L, Schulte R, Timmermeyer N, Thanisch S, Crummenerl L, Jansen G, Michiels N, Schulenburg H. 2013. Sex differences in host defence interfere with parasite-mediated selection for outcrossing during host-parasite coevolution. Ecology Letters. 16(4), 461–468. mla: El Masri, Leila, et al. “Sex Differences in Host Defence Interfere with Parasite-Mediated Selection for Outcrossing during Host-Parasite Coevolution.” Ecology Letters, vol. 16, no. 4, Wiley-Blackwell, 2013, pp. 461–68, doi:10.1111/ele.12068. short: L. El Masri, R. Schulte, N. Timmermeyer, S. Thanisch, L. Crummenerl, G. Jansen, N. Michiels, H. Schulenburg, Ecology Letters 16 (2013) 461–468. date_created: 2018-12-11T11:59:54Z date_published: 2013-04-04T00:00:00Z date_updated: 2022-08-25T14:51:57Z day: '04' ddc: - '570' doi: 10.1111/ele.12068 extern: '1' file: - access_level: open_access checksum: aa7db788f7da7d7f102539a249ebce50 content_type: application/pdf creator: system date_created: 2018-12-12T10:15:52Z date_updated: 2020-07-14T12:45:50Z file_id: '5176' file_name: IST-2016-404-v1+1_ele12068.pdf file_size: 763731 relation: main_file file_date_updated: 2020-07-14T12:45:50Z has_accepted_license: '1' intvolume: ' 16' issue: '4' language: - iso: eng month: '04' oa: 1 oa_version: Published Version page: 461 - 468 publication: Ecology Letters publication_status: published publisher: Wiley-Blackwell publist_id: '3948' pubrep_id: '404' quality_controlled: '1' scopus_import: '1' status: public title: Sex differences in host defence interfere with parasite-mediated selection for outcrossing during host-parasite coevolution 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: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87 volume: 16 year: '2013' ...