---
_id: '6087'
abstract:
- lang: eng
text: Cell fate specification by lateral inhibition typically involves contact signaling
through the Delta-Notch signaling pathway. However, whether this is the only signaling
mode mediating lateral inhibition remains unclear. Here we show that in zebrafish
oogenesis, a group of cells within the granulosa cell layer at the oocyte animal
pole acquire elevated levels of the transcriptional coactivator TAZ in their nuclei.
One of these cells, the future micropyle precursor cell (MPC), accumulates increasingly
high levels of nuclear TAZ and grows faster than its surrounding cells, mechanically
compressing those cells, which ultimately lose TAZ from their nuclei. Strikingly,
relieving neighbor-cell compression by MPC ablation or aspiration restores nuclear
TAZ accumulation in neighboring cells, eventually leading to MPC re-specification
from these cells. Conversely, MPC specification is defective in taz−/− follicles.
These findings uncover a novel mode of lateral inhibition in cell fate specification
based on mechanical signals controlling TAZ activity.
acknowledged_ssus:
- _id: Bio
- _id: EM-Fac
- _id: LifeSc
acknowledgement: We thank Roland Dosch, Makoto Furutani-Seiki, Brian Link, Mary Mullins,
and Masazumi Tada for providing transgenic and/or mutant zebrafish lines; Alexandra
Schauer, Shayan Shami-Pour, and the rest of the Heisenberg lab for technical assistance
and feedback on the manuscript; and the Bioimaging, Electron Microscopy, and Zebrafish
facilities of IST Austria for continuous support. This work was supported by an
ERC advanced grant ( MECSPEC to C.-P.H.).
article_processing_charge: No
article_type: original
author:
- first_name: Peng
full_name: Xia, Peng
id: 4AB6C7D0-F248-11E8-B48F-1D18A9856A87
last_name: Xia
orcid: 0000-0002-5419-7756
- first_name: Daniel J
full_name: Gütl, Daniel J
id: 381929CE-F248-11E8-B48F-1D18A9856A87
last_name: Gütl
- first_name: Vanessa
full_name: Zheden, Vanessa
id: 39C5A68A-F248-11E8-B48F-1D18A9856A87
last_name: Zheden
orcid: 0000-0002-9438-4783
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: Xia P, Gütl DJ, Zheden V, Heisenberg C-PJ. Lateral inhibition in cell specification
mediated by mechanical signals modulating TAZ activity. Cell. 2019;176(6):1379-1392.e14.
doi:10.1016/j.cell.2019.01.019
apa: Xia, P., Gütl, D. J., Zheden, V., & Heisenberg, C.-P. J. (2019). Lateral
inhibition in cell specification mediated by mechanical signals modulating TAZ
activity. Cell. Elsevier. https://doi.org/10.1016/j.cell.2019.01.019
chicago: Xia, Peng, Daniel J Gütl, Vanessa Zheden, and Carl-Philipp J Heisenberg.
“Lateral Inhibition in Cell Specification Mediated by Mechanical Signals Modulating
TAZ Activity.” Cell. Elsevier, 2019. https://doi.org/10.1016/j.cell.2019.01.019.
ieee: P. Xia, D. J. Gütl, V. Zheden, and C.-P. J. Heisenberg, “Lateral inhibition
in cell specification mediated by mechanical signals modulating TAZ activity,”
Cell, vol. 176, no. 6. Elsevier, p. 1379–1392.e14, 2019.
ista: Xia P, Gütl DJ, Zheden V, Heisenberg C-PJ. 2019. Lateral inhibition in cell
specification mediated by mechanical signals modulating TAZ activity. Cell. 176(6),
1379–1392.e14.
mla: Xia, Peng, et al. “Lateral Inhibition in Cell Specification Mediated by Mechanical
Signals Modulating TAZ Activity.” Cell, vol. 176, no. 6, Elsevier, 2019,
p. 1379–1392.e14, doi:10.1016/j.cell.2019.01.019.
short: P. Xia, D.J. Gütl, V. Zheden, C.-P.J. Heisenberg, Cell 176 (2019) 1379–1392.e14.
date_created: 2019-03-10T22:59:19Z
date_published: 2019-03-07T00:00:00Z
date_updated: 2023-08-25T08:02:23Z
day: '07'
department:
- _id: CaHe
- _id: EM-Fac
doi: 10.1016/j.cell.2019.01.019
ec_funded: 1
external_id:
isi:
- '000460509600013'
pmid:
- '30773315'
intvolume: ' 176'
isi: 1
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.cell.2019.01.019
month: '03'
oa: 1
oa_version: Published Version
page: 1379-1392.e14
pmid: 1
project:
- _id: 260F1432-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742573'
name: Interaction and feedback between cell mechanics and fate specification in
vertebrate gastrulation
publication: Cell
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/in-zebrafish-eggs-most-rapidly-growing-cell-inhibits-its-neighbours-through-mechanical-signals/
scopus_import: '1'
status: public
title: Lateral inhibition in cell specification mediated by mechanical signals modulating
TAZ activity
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 176
year: '2019'
...
---
_id: '9806'
abstract:
- lang: eng
text: 1. Hosts can alter their strategy towards pathogens during their lifetime,
i.e., they can show phenotypic plasticity in immunity or life history. Immune
priming is one such example, where a previous encounter with a pathogen confers
enhanced protection upon secondary challenge, resulting in reduced pathogen load
(i.e. resistance) and improved host survival. However, an initial encounter might
also enhance tolerance, particularly to less virulent opportunistic pathogens
that establish persistent infections. In this scenario, individuals are better
able to reduce the negative fitness consequences that result from a high pathogen
load. Finally, previous exposure may also lead to life history adjustments, such
as terminal investment into reproduction. 2. Using different Drosophila melanogaster
host genotypes and two bacterial pathogens, Lactococcus lactis and Pseudomonas
entomophila, we tested if previous exposure results in resistance or tolerance
and whether it modifies immune gene expression during an acute-phase infection
(one day post-challenge). We then asked if previous pathogen exposure affects
chronic-phase pathogen persistence and longer-term survival (28 days post-challenge).
3. We predicted that previous exposure would increase host resistance to an early
stage bacterial infection while it might come at a cost to host fecundity tolerance.
We reasoned that resistance would be due in part to stronger immune gene expression
after challenge. We expected that previous exposure would improve long-term survival,
that it would reduce infection persistence, and we expected to find genetic variation
in these responses. 4. We found that previous exposure to P. entomophila weakened
host resistance to a second infection independent of genotype and had no effect
on immune gene expression. Fecundity tolerance showed genotypic variation but
was not influenced by previous exposure. However, L. lactis persisted as a chronic
infection, whereas survivors cleared the more pathogenic P. entomophila infection.
5. To our knowledge, this is the first study that addresses host tolerance to
bacteria in relation to previous exposure, taking a multi-faceted approach to
address the topic. Our results suggest that previous exposure comes with transient
costs to resistance during the early stage of infection in this host-pathogen
system and that infection persistence may be bacterium-specific.
article_processing_charge: No
author:
- first_name: Megan
full_name: Kutzer, Megan
id: 29D0B332-F248-11E8-B48F-1D18A9856A87
last_name: Kutzer
orcid: 0000-0002-8696-6978
- first_name: Joachim
full_name: Kurtz, Joachim
last_name: Kurtz
- first_name: Sophie A.O.
full_name: Armitage, Sophie A.O.
last_name: Armitage
citation:
ama: 'Kutzer M, Kurtz J, Armitage SAO. Data from: A multi-faceted approach testing
the effects of previous bacterial exposure on resistance and tolerance. 2019.
doi:10.5061/dryad.9kj41f0'
apa: 'Kutzer, M., Kurtz, J., & Armitage, S. A. O. (2019). Data from: A multi-faceted
approach testing the effects of previous bacterial exposure on resistance and
tolerance. Dryad. https://doi.org/10.5061/dryad.9kj41f0'
chicago: 'Kutzer, Megan, Joachim Kurtz, and Sophie A.O. Armitage. “Data from: A
Multi-Faceted Approach Testing the Effects of Previous Bacterial Exposure on Resistance
and Tolerance.” Dryad, 2019. https://doi.org/10.5061/dryad.9kj41f0.'
ieee: 'M. Kutzer, J. Kurtz, and S. A. O. Armitage, “Data from: A multi-faceted approach
testing the effects of previous bacterial exposure on resistance and tolerance.”
Dryad, 2019.'
ista: 'Kutzer M, Kurtz J, Armitage SAO. 2019. Data from: A multi-faceted approach
testing the effects of previous bacterial exposure on resistance and tolerance,
Dryad, 10.5061/dryad.9kj41f0.'
mla: 'Kutzer, Megan, et al. Data from: A Multi-Faceted Approach Testing the Effects
of Previous Bacterial Exposure on Resistance and Tolerance. Dryad, 2019, doi:10.5061/dryad.9kj41f0.'
short: M. Kutzer, J. Kurtz, S.A.O. Armitage, (2019).
date_created: 2021-08-06T12:06:40Z
date_published: 2019-02-05T00:00:00Z
date_updated: 2023-08-25T08:04:52Z
day: '05'
department:
- _id: SyCr
doi: 10.5061/dryad.9kj41f0
main_file_link:
- open_access: '1'
url: https://doi.org/10.5061/dryad.9kj41f0
month: '02'
oa: 1
oa_version: Published Version
publisher: Dryad
related_material:
record:
- id: '6105'
relation: used_in_publication
status: public
status: public
title: 'Data from: A multi-faceted approach testing the effects of previous bacterial
exposure on resistance and tolerance'
type: research_data_reference
user_id: 6785fbc1-c503-11eb-8a32-93094b40e1cf
year: '2019'
...
---
_id: '6086'
abstract:
- lang: eng
text: We show that linear analytic cocycles where all Lyapunov exponents are negative
infinite are nilpotent. For such one-frequency cocycles we show that they can
be analytically conjugated to an upper triangular cocycle or a Jordan normal form.
As a consequence, an arbitrarily small analytic perturbation leads to distinct
Lyapunov exponents. Moreover, in the one-frequency case where the th Lyapunov
exponent is finite and the st negative infinite, we obtain a simple criterion
for domination in which case there is a splitting into a nilpotent part and an
invertible part.
article_processing_charge: No
author:
- first_name: Christian
full_name: Sadel, Christian
id: 4760E9F8-F248-11E8-B48F-1D18A9856A87
last_name: Sadel
orcid: 0000-0001-8255-3968
- first_name: Disheng
full_name: Xu, Disheng
last_name: Xu
citation:
ama: Sadel C, Xu D. Singular analytic linear cocycles with negative infinite Lyapunov
exponents. Ergodic Theory and Dynamical Systems. 2019;39(4):1082-1098.
doi:10.1017/etds.2017.52
apa: Sadel, C., & Xu, D. (2019). Singular analytic linear cocycles with negative
infinite Lyapunov exponents. Ergodic Theory and Dynamical Systems. Cambridge
University Press. https://doi.org/10.1017/etds.2017.52
chicago: Sadel, Christian, and Disheng Xu. “Singular Analytic Linear Cocycles with
Negative Infinite Lyapunov Exponents.” Ergodic Theory and Dynamical Systems.
Cambridge University Press, 2019. https://doi.org/10.1017/etds.2017.52.
ieee: C. Sadel and D. Xu, “Singular analytic linear cocycles with negative infinite
Lyapunov exponents,” Ergodic Theory and Dynamical Systems, vol. 39, no.
4. Cambridge University Press, pp. 1082–1098, 2019.
ista: Sadel C, Xu D. 2019. Singular analytic linear cocycles with negative infinite
Lyapunov exponents. Ergodic Theory and Dynamical Systems. 39(4), 1082–1098.
mla: Sadel, Christian, and Disheng Xu. “Singular Analytic Linear Cocycles with Negative
Infinite Lyapunov Exponents.” Ergodic Theory and Dynamical Systems, vol.
39, no. 4, Cambridge University Press, 2019, pp. 1082–98, doi:10.1017/etds.2017.52.
short: C. Sadel, D. Xu, Ergodic Theory and Dynamical Systems 39 (2019) 1082–1098.
date_created: 2019-03-10T22:59:18Z
date_published: 2019-04-01T00:00:00Z
date_updated: 2023-08-25T08:03:30Z
day: '01'
department:
- _id: LaEr
doi: 10.1017/etds.2017.52
ec_funded: 1
external_id:
arxiv:
- '1601.06118'
isi:
- '000459725600012'
intvolume: ' 39'
isi: 1
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1601.06118
month: '04'
oa: 1
oa_version: Preprint
page: 1082-1098
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication: Ergodic Theory and Dynamical Systems
publication_status: published
publisher: Cambridge University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Singular analytic linear cocycles with negative infinite Lyapunov exponents
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 39
year: '2019'
...
---
_id: '6102'
abstract:
- lang: eng
text: 'Light is a union of electric and magnetic fields, and nowhere is the complex
relationship between these fields more evident than in the near fields of nanophotonic
structures. There, complicated electric and magnetic fields varying over subwavelength
scales are generally present, which results in photonic phenomena such as extraordinary
optical momentum, superchiral fields, and a complex spatial evolution of optical
singularities. An understanding of such phenomena requires nanoscale measurements
of the complete optical field vector. Although the sensitivity of near- field
scanning optical microscopy to the complete electromagnetic field was recently
demonstrated, a separation of different components required a priori knowledge
of the sample. Here, we introduce a robust algorithm that can disentangle all
six electric and magnetic field components from a single near-field measurement
without any numerical modeling of the structure. As examples, we unravel the fields
of two prototypical nanophotonic structures: a photonic crystal waveguide and
a plasmonic nanowire. These results pave the way for new studies of complex photonic
phenomena at the nanoscale and for the design of structures that optimize their
optical behavior.'
article_number: '28'
article_processing_charge: No
author:
- first_name: B.
full_name: Le Feber, B.
last_name: Le Feber
- first_name: J. E.
full_name: Sipe, J. E.
last_name: Sipe
- first_name: Matthias
full_name: Wulf, Matthias
id: 45598606-F248-11E8-B48F-1D18A9856A87
last_name: Wulf
orcid: 0000-0001-6613-1378
- first_name: L.
full_name: Kuipers, L.
last_name: Kuipers
- first_name: N.
full_name: Rotenberg, N.
last_name: Rotenberg
citation:
ama: 'Le Feber B, Sipe JE, Wulf M, Kuipers L, Rotenberg N. A full vectorial mapping
of nanophotonic light fields. Light: Science and Applications. 2019;8(1).
doi:10.1038/s41377-019-0124-3'
apa: 'Le Feber, B., Sipe, J. E., Wulf, M., Kuipers, L., & Rotenberg, N. (2019).
A full vectorial mapping of nanophotonic light fields. Light: Science and Applications.
Springer Nature. https://doi.org/10.1038/s41377-019-0124-3'
chicago: 'Le Feber, B., J. E. Sipe, Matthias Wulf, L. Kuipers, and N. Rotenberg.
“A Full Vectorial Mapping of Nanophotonic Light Fields.” Light: Science and
Applications. Springer Nature, 2019. https://doi.org/10.1038/s41377-019-0124-3.'
ieee: 'B. Le Feber, J. E. Sipe, M. Wulf, L. Kuipers, and N. Rotenberg, “A full vectorial
mapping of nanophotonic light fields,” Light: Science and Applications,
vol. 8, no. 1. Springer Nature, 2019.'
ista: 'Le Feber B, Sipe JE, Wulf M, Kuipers L, Rotenberg N. 2019. A full vectorial
mapping of nanophotonic light fields. Light: Science and Applications. 8(1), 28.'
mla: 'Le Feber, B., et al. “A Full Vectorial Mapping of Nanophotonic Light Fields.”
Light: Science and Applications, vol. 8, no. 1, 28, Springer Nature, 2019,
doi:10.1038/s41377-019-0124-3.'
short: 'B. Le Feber, J.E. Sipe, M. Wulf, L. Kuipers, N. Rotenberg, Light: Science
and Applications 8 (2019).'
date_created: 2019-03-17T22:59:13Z
date_published: 2019-03-06T00:00:00Z
date_updated: 2023-08-25T08:06:10Z
day: '06'
ddc:
- '530'
department:
- _id: JoFi
doi: 10.1038/s41377-019-0124-3
external_id:
arxiv:
- '1803.10145'
isi:
- '000460470700004'
file:
- access_level: open_access
checksum: d71e528cff9c56f70ccc29dd7005257f
content_type: application/pdf
creator: dernst
date_created: 2019-03-18T08:08:22Z
date_updated: 2020-07-14T12:47:19Z
file_id: '6108'
file_name: 2019_Light_LeFeber.pdf
file_size: 1119947
relation: main_file
file_date_updated: 2020-07-14T12:47:19Z
has_accepted_license: '1'
intvolume: ' 8'
isi: 1
issue: '1'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
publication: 'Light: Science and Applications'
publication_identifier:
eissn:
- '20477538'
issn:
- '20955545'
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: A full vectorial mapping of nanophotonic light fields
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: '6104'
abstract:
- lang: eng
text: Abiotic stress poses constant challenges for plant survival and is a serious
problem for global agricultural productivity. On a molecular level, stress conditions
result in elevation of reactive oxygen species (ROS) production causing oxidative
stress associated with oxidation of proteins and nucleic acids as well as impairment
of membrane functions. Adaptation of root growth to ROS accumulation is facilitated
through modification of auxin and cytokinin hormone homeostasis. Here, we report
that in Arabidopsis root meristem, ROS-induced changes of auxin levels correspond
to decreased abundance of PIN auxin efflux carriers at the plasma membrane (PM).
Specifically, increase in H2O2 levels affects PIN2 endocytic recycling. We show
that the PIN2 intracellular trafficking during adaptation to oxidative stress
requires the function of the ADP-ribosylation factor (ARF)-guanine-nucleotide
exchange factor (GEF) BEN1, an actin-associated regulator of the trafficking from
the PM to early endosomes and, presumably, indirectly, trafficking to the vacuoles.
We propose that H2O2 levels affect the actin dynamics thus modulating ARF-GEF-dependent
trafficking of PIN2. This mechanism provides a way how root growth acclimates
to stress and adapts to a changing environment.
article_processing_charge: No
author:
- first_name: Marta
full_name: Zwiewka, Marta
last_name: Zwiewka
- first_name: Agnieszka
full_name: Bielach, Agnieszka
last_name: Bielach
- first_name: Prashanth
full_name: Tamizhselvan, Prashanth
last_name: Tamizhselvan
- first_name: Sharmila
full_name: Madhavan, Sharmila
last_name: Madhavan
- first_name: Eman Elrefaay
full_name: Ryad, Eman Elrefaay
last_name: Ryad
- first_name: Shutang
full_name: Tan, Shutang
id: 2DE75584-F248-11E8-B48F-1D18A9856A87
last_name: Tan
orcid: 0000-0002-0471-8285
- first_name: Mónika
full_name: Hrtyan, Mónika
id: 45A71A74-F248-11E8-B48F-1D18A9856A87
last_name: Hrtyan
- first_name: Petre
full_name: Dobrev, Petre
last_name: Dobrev
- first_name: Radomira
full_name: Vanková, Radomira
last_name: Vanková
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Vanesa B.
full_name: Tognetti, Vanesa B.
last_name: Tognetti
citation:
ama: Zwiewka M, Bielach A, Tamizhselvan P, et al. Root adaptation to H2O2-induced
oxidative stress by ARF-GEF BEN1- and cytoskeleton-mediated PIN2 trafficking.
Plant and Cell Physiology. 2019;60(2):255-273. doi:10.1093/pcp/pcz001
apa: Zwiewka, M., Bielach, A., Tamizhselvan, P., Madhavan, S., Ryad, E. E., Tan,
S., … Tognetti, V. B. (2019). Root adaptation to H2O2-induced oxidative stress
by ARF-GEF BEN1- and cytoskeleton-mediated PIN2 trafficking. Plant and Cell
Physiology. Oxford University Press. https://doi.org/10.1093/pcp/pcz001
chicago: Zwiewka, Marta, Agnieszka Bielach, Prashanth Tamizhselvan, Sharmila Madhavan,
Eman Elrefaay Ryad, Shutang Tan, Mónika Hrtyan, et al. “Root Adaptation to H2O2-Induced
Oxidative Stress by ARF-GEF BEN1- and Cytoskeleton-Mediated PIN2 Trafficking.”
Plant and Cell Physiology. Oxford University Press, 2019. https://doi.org/10.1093/pcp/pcz001.
ieee: M. Zwiewka et al., “Root adaptation to H2O2-induced oxidative stress
by ARF-GEF BEN1- and cytoskeleton-mediated PIN2 trafficking,” Plant and Cell
Physiology, vol. 60, no. 2. Oxford University Press, pp. 255–273, 2019.
ista: Zwiewka M, Bielach A, Tamizhselvan P, Madhavan S, Ryad EE, Tan S, Hrtyan M,
Dobrev P, Vanková R, Friml J, Tognetti VB. 2019. Root adaptation to H2O2-induced
oxidative stress by ARF-GEF BEN1- and cytoskeleton-mediated PIN2 trafficking.
Plant and Cell Physiology. 60(2), 255–273.
mla: Zwiewka, Marta, et al. “Root Adaptation to H2O2-Induced Oxidative Stress by
ARF-GEF BEN1- and Cytoskeleton-Mediated PIN2 Trafficking.” Plant and Cell Physiology,
vol. 60, no. 2, Oxford University Press, 2019, pp. 255–73, doi:10.1093/pcp/pcz001.
short: M. Zwiewka, A. Bielach, P. Tamizhselvan, S. Madhavan, E.E. Ryad, S. Tan,
M. Hrtyan, P. Dobrev, R. Vanková, J. Friml, V.B. Tognetti, Plant and Cell Physiology
60 (2019) 255–273.
date_created: 2019-03-17T22:59:14Z
date_published: 2019-02-01T00:00:00Z
date_updated: 2023-08-25T08:05:28Z
day: '01'
department:
- _id: JiFr
doi: 10.1093/pcp/pcz001
external_id:
isi:
- '000459634300002'
pmid:
- '30668780'
intvolume: ' 60'
isi: 1
issue: '2'
language:
- iso: eng
month: '02'
oa_version: None
page: 255-273
pmid: 1
publication: Plant and Cell Physiology
publication_identifier:
eissn:
- 1471-9053
issn:
- 0032-0781
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Root adaptation to H2O2-induced oxidative stress by ARF-GEF BEN1- and cytoskeleton-mediated
PIN2 trafficking
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 60
year: '2019'
...