---
OA_place: publisher
OA_type: hybrid
_id: '15381'
abstract:
- lang: eng
text: 'Cholecystokinin-expressing interneurons (CCKIs) are hypothesized to shape
pyramidal cell-firing patterns and regulate network oscillations and related network
state transitions. To directly probe their role in the CA1 region, we silenced
their activity using optogenetic and chemogenetic tools in mice. Opto-tagged CCKIs
revealed a heterogeneous population, and their optogenetic silencing triggered
wide disinhibitory network changes affecting both pyramidal cells and other interneurons.
CCKI silencing enhanced pyramidal cell burst firing and altered the temporal coding
of place cells: theta phase precession was disrupted, whereas sequence reactivation
was enhanced. Chemogenetic CCKI silencing did not alter the acquisition of spatial
reference memories on the Morris water maze but enhanced the recall of contextual
fear memories and enabled selective recall when similar environments were tested.
This work suggests the key involvement of CCKIs in the control of place-cell temporal
coding and the formation of contextual memories.'
acknowledged_ssus:
- _id: M-Shop
- _id: Bio
- _id: LifeSc
- _id: PreCl
acknowledgement: We thank the kind donations from Andrea Varro, Brian Sauer, Edward
Boyden, and Peter Jonas. We thank Jago Wallenschus, Kerstin Kronenbitter, and Didier
Gremelle for outstanding technical support; Laura Bollepalli for initial viral targeting
experiments; Cihan Önal for initial electrophysiology experiments; Yoav Ben-Simon
for histological advice; and Anton Nikitenko for contributing to the analysis. We
acknowledge support from the Miba Machine Shop, Bioimaging-, Life Science- and Pre-Clinical
Facilities at ISTA. This work was supported by the Austrian Science Fund (FWF I3713
to J.C. as part of the FOR 2143 research consortium), the Deutsche Forschungsgemeinschaft
(DFG) (WU 503/2-2 to P.W.), and the Medical Research Council, United Kingdom (grant
G1100546/2 to P.W.).
article_processing_charge: Yes (via OA deal)
article_type: original
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
- first_name: Kira
full_name: Balueva, Kira
last_name: Balueva
- first_name: Uladzislau
full_name: Barayeu, Uladzislau
id: b515be12-ec90-11ea-b966-d0b5e15613d2
last_name: Barayeu
- first_name: Peter
full_name: Baracskay, Peter
id: 361CC00E-F248-11E8-B48F-1D18A9856A87
last_name: Baracskay
- first_name: Igor
full_name: Gridchyn, Igor
id: 4B60654C-F248-11E8-B48F-1D18A9856A87
last_name: Gridchyn
orcid: 0000-0002-1807-1929
- first_name: Michele
full_name: Nardin, Michele
id: 30BD0376-F248-11E8-B48F-1D18A9856A87
last_name: Nardin
orcid: 0000-0001-8849-6570
- first_name: Chiara N
full_name: Roth, Chiara N
id: 37BB4FB6-F248-11E8-B48F-1D18A9856A87
last_name: Roth
- first_name: Peer
full_name: Wulff, Peer
last_name: Wulff
- 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: Rangel Guerrero DK, Balueva K, Barayeu U, et al. Hippocampal cholecystokinin-expressing
interneurons regulate temporal coding and contextual learning. Neuron.
2024;112(12):2045-2061.e10. doi:10.1016/j.neuron.2024.03.019
apa: Rangel Guerrero, D. K., Balueva, K., Barayeu, U., Baracskay, P., Gridchyn,
I., Nardin, M., … Csicsvari, J. L. (2024). Hippocampal cholecystokinin-expressing
interneurons regulate temporal coding and contextual learning. Neuron.
Cell Press. https://doi.org/10.1016/j.neuron.2024.03.019
chicago: Rangel Guerrero, Dámaris K, Kira Balueva, Uladzislau Barayeu, Peter Baracskay,
Igor Gridchyn, Michele Nardin, Chiara N Roth, Peer Wulff, and Jozsef L Csicsvari.
“Hippocampal Cholecystokinin-Expressing Interneurons Regulate Temporal Coding
and Contextual Learning.” Neuron. Cell Press, 2024. https://doi.org/10.1016/j.neuron.2024.03.019.
ieee: D. K. Rangel Guerrero et al., “Hippocampal cholecystokinin-expressing
interneurons regulate temporal coding and contextual learning,” Neuron,
vol. 112, no. 12. Cell Press, p. 2045–2061.e10, 2024.
ista: Rangel Guerrero DK, Balueva K, Barayeu U, Baracskay P, Gridchyn I, Nardin
M, Roth CN, Wulff P, Csicsvari JL. 2024. Hippocampal cholecystokinin-expressing
interneurons regulate temporal coding and contextual learning. Neuron. 112(12),
2045–2061.e10.
mla: Rangel Guerrero, Dámaris K., et al. “Hippocampal Cholecystokinin-Expressing
Interneurons Regulate Temporal Coding and Contextual Learning.” Neuron,
vol. 112, no. 12, Cell Press, 2024, p. 2045–2061.e10, doi:10.1016/j.neuron.2024.03.019.
short: D.K. Rangel Guerrero, K. Balueva, U. Barayeu, P. Baracskay, I. Gridchyn,
M. Nardin, C.N. Roth, P. Wulff, J.L. Csicsvari, Neuron 112 (2024) 2045–2061.e10.
corr_author: '1'
date_created: 2024-05-12T22:01:03Z
date_published: 2024-06-19T00:00:00Z
date_updated: 2025-09-08T07:26:42Z
day: '19'
ddc:
- '570'
department:
- _id: JoCs
doi: 10.1016/j.neuron.2024.03.019
external_id:
isi:
- '001300571400001'
pmid:
- '38636524'
file:
- access_level: open_access
checksum: de5b18ff293d42bd90e83a193e889844
content_type: application/pdf
creator: dernst
date_created: 2025-01-09T09:15:31Z
date_updated: 2025-01-09T09:15:31Z
file_id: '18798'
file_name: 2024_Neuron_RangelGuerrero.pdf
file_size: 9149079
relation: main_file
success: 1
file_date_updated: 2025-01-09T09:15:31Z
has_accepted_license: '1'
intvolume: ' 112'
isi: 1
issue: '12'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '06'
oa: 1
oa_version: Published Version
page: 2045-2061.e10
pmid: 1
project:
- _id: 2654F984-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I 3713-B27
name: Interneuro plasticity during spatial learning
publication: Neuron
publication_identifier:
eissn:
- 1097-4199
issn:
- 0896-6273
publication_status: published
publisher: Cell Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Hippocampal cholecystokinin-expressing interneurons regulate temporal coding
and contextual learning
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: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 112
year: '2024'
...
---
_id: '10614'
abstract:
- lang: eng
text: 'The infiltration of immune cells into tissues underlies the establishment
of tissue-resident macrophages and responses to infections and tumors. Yet the
mechanisms immune cells utilize to negotiate tissue barriers in living organisms
are not well understood, and a role for cortical actin has not been examined.
Here, we find that the tissue invasion of Drosophila macrophages, also known as
plasmatocytes or hemocytes, utilizes enhanced cortical F-actin levels stimulated
by the Drosophila member of the fos proto oncogene transcription factor family
(Dfos, Kayak). RNA sequencing analysis and live imaging show that Dfos enhances
F-actin levels around the entire macrophage surface by increasing mRNA levels
of the membrane spanning molecular scaffold tetraspanin TM4SF, and the actin cross-linking
filamin Cheerio, which are themselves required for invasion. Both the filamin
and the tetraspanin enhance the cortical activity of Rho1 and the formin Diaphanous
and thus the assembly of cortical actin, which is a critical function since expressing
a dominant active form of Diaphanous can rescue the Dfos macrophage invasion defect.
In vivo imaging shows that Dfos enhances the efficiency of the initial phases
of macrophage tissue entry. Genetic evidence argues that this Dfos-induced program
in macrophages counteracts the constraint produced by the tension of surrounding
tissues and buffers the properties of the macrophage nucleus from affecting tissue
entry. We thus identify strengthening the cortical actin cytoskeleton through
Dfos as a key process allowing efficient forward movement of an immune cell into
surrounding tissues. '
acknowledged_ssus:
- _id: LifeSc
acknowledgement: 'We thank the following for their contributions: Plasmids were supplied
by the Drosophila Genomics Resource Center (NIH 2P40OD010949-10A1); fly stocks were
provided by K. Brueckner, B. Stramer, M. Uhlirova, O. Schuldiner, the Bloomington
Drosophila Stock Center (NIH P40OD018537) and the Vienna Drosophila Resource Center,
FlyBase for essential genomic information, and the BDGP in situ database for data.
For antibodies, we thank the Developmental Studies Hybridoma Bank, which was created
by the Eunice Kennedy Shriver National Institute of Child Health and Human Development
of the NIH and is maintained at the University of Iowa, as well as J. Zeitlinger
for her generous gift of Dfos antibody. We thank the Vienna BioCenter Core Facilities
for RNA sequencing and analysis and the Life Scientific Service Units at IST Austria
for technical support and assistance with microscopy and FACS analysis. We thank
C. P. Heisenberg, P. Martin, M. Sixt, and Siekhaus group members for discussions
and T. Hurd, A. Ratheesh, and P. Rangan for comments on the manuscript.'
article_processing_charge: No
article_type: original
author:
- first_name: Vera
full_name: Belyaeva, Vera
id: 47F080FE-F248-11E8-B48F-1D18A9856A87
last_name: Belyaeva
- first_name: Stephanie
full_name: Wachner, Stephanie
id: 2A95E7B0-F248-11E8-B48F-1D18A9856A87
last_name: Wachner
- first_name: Attila
full_name: György, Attila
id: 3BCEDBE0-F248-11E8-B48F-1D18A9856A87
last_name: György
orcid: 0000-0002-1819-198X
- first_name: Shamsi
full_name: Emtenani, Shamsi
id: 49D32318-F248-11E8-B48F-1D18A9856A87
last_name: Emtenani
orcid: 0000-0001-6981-6938
- first_name: Igor
full_name: Gridchyn, Igor
id: 4B60654C-F248-11E8-B48F-1D18A9856A87
last_name: Gridchyn
orcid: 0000-0002-1807-1929
- first_name: Maria
full_name: Akhmanova, Maria
id: 3425EC26-F248-11E8-B48F-1D18A9856A87
last_name: Akhmanova
orcid: 0000-0003-1522-3162
- first_name: M
full_name: Linder, M
last_name: Linder
- first_name: Marko
full_name: Roblek, Marko
id: 3047D808-F248-11E8-B48F-1D18A9856A87
last_name: Roblek
orcid: 0000-0001-9588-1389
- first_name: M
full_name: Sibilia, M
last_name: Sibilia
- 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: Belyaeva V, Wachner S, György A, et al. Fos regulates macrophage infiltration
against surrounding tissue resistance by a cortical actin-based mechanism in Drosophila.
PLoS Biology. 2022;20(1):e3001494. doi:10.1371/journal.pbio.3001494
apa: Belyaeva, V., Wachner, S., György, A., Emtenani, S., Gridchyn, I., Akhmanova,
M., … Siekhaus, D. E. (2022). Fos regulates macrophage infiltration against surrounding
tissue resistance by a cortical actin-based mechanism in Drosophila. PLoS Biology.
Public Library of Science. https://doi.org/10.1371/journal.pbio.3001494
chicago: Belyaeva, Vera, Stephanie Wachner, Attila György, Shamsi Emtenani, Igor
Gridchyn, Maria Akhmanova, M Linder, Marko Roblek, M Sibilia, and Daria E Siekhaus.
“Fos Regulates Macrophage Infiltration against Surrounding Tissue Resistance by
a Cortical Actin-Based Mechanism in Drosophila.” PLoS Biology. Public Library
of Science, 2022. https://doi.org/10.1371/journal.pbio.3001494.
ieee: V. Belyaeva et al., “Fos regulates macrophage infiltration against
surrounding tissue resistance by a cortical actin-based mechanism in Drosophila,”
PLoS Biology, vol. 20, no. 1. Public Library of Science, p. e3001494, 2022.
ista: Belyaeva V, Wachner S, György A, Emtenani S, Gridchyn I, Akhmanova M, Linder
M, Roblek M, Sibilia M, Siekhaus DE. 2022. Fos regulates macrophage infiltration
against surrounding tissue resistance by a cortical actin-based mechanism in Drosophila.
PLoS Biology. 20(1), e3001494.
mla: Belyaeva, Vera, et al. “Fos Regulates Macrophage Infiltration against Surrounding
Tissue Resistance by a Cortical Actin-Based Mechanism in Drosophila.” PLoS
Biology, vol. 20, no. 1, Public Library of Science, 2022, p. e3001494, doi:10.1371/journal.pbio.3001494.
short: V. Belyaeva, S. Wachner, A. György, S. Emtenani, I. Gridchyn, M. Akhmanova,
M. Linder, M. Roblek, M. Sibilia, D.E. Siekhaus, PLoS Biology 20 (2022) e3001494.
corr_author: '1'
date_created: 2022-01-12T10:18:17Z
date_published: 2022-01-06T00:00:00Z
date_updated: 2026-04-28T22:30:33Z
day: '06'
ddc:
- '570'
department:
- _id: DaSi
- _id: JoCs
doi: 10.1371/journal.pbio.3001494
ec_funded: 1
external_id:
isi:
- '000971223700001'
pmid:
- '34990456'
file:
- access_level: open_access
checksum: f454212a5522a7818ba4b2892315c478
content_type: application/pdf
creator: cchlebak
date_created: 2022-01-12T13:50:04Z
date_updated: 2022-01-12T13:50:04Z
file_id: '10615'
file_name: 2022_PLOSBio_Belyaeva.pdf
file_size: 5426932
relation: main_file
success: 1
file_date_updated: 2022-01-12T13:50:04Z
has_accepted_license: '1'
intvolume: ' 20'
isi: 1
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
page: e3001494
pmid: 1
project:
- _id: 253B6E48-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P29638
name: The role of Drosophila TNF alpha in immune cell invasion
- _id: 26199CA4-B435-11E9-9278-68D0E5697425
grant_number: '24800'
name: Implications of a TGFβ/Dpp-activated subpopulation for Drosophila macrophage
migration
- _id: 2536F660-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '334077'
name: Investigating the role of transporters in invasive migration through junctions
publication: PLoS Biology
publication_identifier:
eissn:
- 1545-7885
issn:
- 1544-9173
publication_status: published
publisher: Public Library of Science
quality_controlled: '1'
related_material:
link:
- relation: earlier_version
url: https://www.biorxiv.org/content/10.1101/2020.09.18.301481
- description: News on the ISTA Website
relation: press_release
url: https://ista.ac.at/en/news/resisting-the-pressure/
record:
- id: '8557'
relation: earlier_version
status: public
- id: '11193'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: Fos regulates macrophage infiltration against surrounding tissue resistance
by a cortical actin-based mechanism in Drosophila
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: 20
year: '2022'
...
---
_id: '8740'
abstract:
- lang: eng
text: In vitro work revealed that excitatory synaptic inputs to hippocampal inhibitory
interneurons could undergo Hebbian, associative, or non-associative plasticity.
Both behavioral and learning-dependent reorganization of these connections has
also been demonstrated by measuring spike transmission probabilities in pyramidal
cell-interneuron spike cross-correlations that indicate monosynaptic connections.
Here we investigated the activity-dependent modification of these connections
during exploratory behavior in rats by optogenetically inhibiting pyramidal cell
and interneuron subpopulations. Light application and associated firing alteration
of pyramidal and interneuron populations led to lasting changes in pyramidal-interneuron
connection weights as indicated by spike transmission changes. Spike transmission
alterations were predicted by the light-mediated changes in the number of pre-
and postsynaptic spike pairing events and by firing rate changes of interneurons
but not pyramidal cells. This work demonstrates the presence of activity-dependent
associative and non-associative reorganization of pyramidal-interneuron connections
triggered by the optogenetic modification of the firing rate and spike synchrony
of cells.
acknowledgement: We thank Michele Nardin and Federico Stella for comments on an earlier
version of the manuscript. K Deisseroth for providing the pAAV-CaMKIIα::eNpHR3.0-YFP
plasmid through Addgene. E Boyden for providing AAV2/1.CaMKII::ArchT.GFP.WPRE.SV40
plasmid through Penn Vector Core. This work was supported by the Austrian Science
Fund (I02072 and I03713) and a Swiss National Science Foundation grant to PS. The
authors declare no conflicts of interest.
article_number: '61106'
article_processing_charge: No
article_type: original
author:
- first_name: Igor
full_name: Gridchyn, Igor
id: 4B60654C-F248-11E8-B48F-1D18A9856A87
last_name: Gridchyn
orcid: 0000-0002-1807-1929
- first_name: Philipp
full_name: Schönenberger, Philipp
id: 3B9D816C-F248-11E8-B48F-1D18A9856A87
last_name: Schönenberger
- 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: Gridchyn I, Schönenberger P, O’Neill J, Csicsvari JL. Optogenetic inhibition-mediated
activity-dependent modification of CA1 pyramidal-interneuron connections during
behavior. eLife. 2020;9. doi:10.7554/eLife.61106
apa: Gridchyn, I., Schönenberger, P., O’Neill, J., & Csicsvari, J. L. (2020).
Optogenetic inhibition-mediated activity-dependent modification of CA1 pyramidal-interneuron
connections during behavior. ELife. eLife Sciences Publications. https://doi.org/10.7554/eLife.61106
chicago: Gridchyn, Igor, Philipp Schönenberger, Joseph O’Neill, and Jozsef L Csicsvari.
“Optogenetic Inhibition-Mediated Activity-Dependent Modification of CA1 Pyramidal-Interneuron
Connections during Behavior.” ELife. eLife Sciences Publications, 2020.
https://doi.org/10.7554/eLife.61106.
ieee: I. Gridchyn, P. Schönenberger, J. O’Neill, and J. L. Csicsvari, “Optogenetic
inhibition-mediated activity-dependent modification of CA1 pyramidal-interneuron
connections during behavior,” eLife, vol. 9. eLife Sciences Publications,
2020.
ista: Gridchyn I, Schönenberger P, O’Neill J, Csicsvari JL. 2020. Optogenetic inhibition-mediated
activity-dependent modification of CA1 pyramidal-interneuron connections during
behavior. eLife. 9, 61106.
mla: Gridchyn, Igor, et al. “Optogenetic Inhibition-Mediated Activity-Dependent
Modification of CA1 Pyramidal-Interneuron Connections during Behavior.” ELife,
vol. 9, 61106, eLife Sciences Publications, 2020, doi:10.7554/eLife.61106.
short: I. Gridchyn, P. Schönenberger, J. O’Neill, J.L. Csicsvari, ELife 9 (2020).
corr_author: '1'
date_created: 2020-11-08T23:01:25Z
date_published: 2020-10-05T00:00:00Z
date_updated: 2026-04-07T08:37:11Z
day: '05'
ddc:
- '570'
department:
- _id: JoCs
doi: 10.7554/eLife.61106
external_id:
isi:
- '000584369000001'
pmid:
- '33016875'
file:
- access_level: open_access
checksum: 6a7b0543c440f4c000a1864e69377d95
content_type: application/pdf
creator: dernst
date_created: 2020-11-09T09:17:40Z
date_updated: 2020-11-09T09:17:40Z
file_id: '8749'
file_name: 2020_eLife_Gridchyn.pdf
file_size: 447669
relation: main_file
success: 1
file_date_updated: 2020-11-09T09:17:40Z
has_accepted_license: '1'
intvolume: ' 9'
isi: 1
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 257D4372-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I2072-B27
name: Interneuron plasticity during spatial learning
- _id: 2654F984-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I 3713-B27
name: Interneuro plasticity during spatial learning
publication: eLife
publication_identifier:
eissn:
- 2050-084X
publication_status: published
publisher: eLife Sciences Publications
quality_controlled: '1'
related_material:
record:
- id: '8563'
relation: research_data
status: public
scopus_import: '1'
status: public
title: Optogenetic inhibition-mediated activity-dependent modification of CA1 pyramidal-interneuron
connections during behavior
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: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 9
year: '2020'
...
---
_id: '8563'
abstract:
- lang: eng
text: "Supplementary data provided for the provided for the publication:\r\nIgor
Gridchyn , Philipp Schoenenberger , Joseph O'Neill , Jozsef Csicsvari (2020) Optogenetic
inhibition-mediated activity-dependent modification of CA1 pyramidal-interneuron
connections during behavior. Elife."
article_processing_charge: No
author:
- first_name: Jozsef L
full_name: Csicsvari, Jozsef L
id: 3FA14672-F248-11E8-B48F-1D18A9856A87
last_name: Csicsvari
orcid: 0000-0002-5193-4036
- first_name: Igor
full_name: Gridchyn, Igor
id: 4B60654C-F248-11E8-B48F-1D18A9856A87
last_name: Gridchyn
orcid: 0000-0002-1807-1929
- first_name: Philipp
full_name: Schönenberger, Philipp
id: 3B9D816C-F248-11E8-B48F-1D18A9856A87
last_name: Schönenberger
citation:
ama: Csicsvari JL, Gridchyn I, Schönenberger P. Optogenetic alteration of hippocampal
network activity. 2020. doi:10.15479/AT:ISTA:8563
apa: Csicsvari, J. L., Gridchyn, I., & Schönenberger, P. (2020). Optogenetic
alteration of hippocampal network activity. Institute of Science and Technology
Austria. https://doi.org/10.15479/AT:ISTA:8563
chicago: Csicsvari, Jozsef L, Igor Gridchyn, and Philipp Schönenberger. “Optogenetic
Alteration of Hippocampal Network Activity.” Institute of Science and Technology
Austria, 2020. https://doi.org/10.15479/AT:ISTA:8563.
ieee: J. L. Csicsvari, I. Gridchyn, and P. Schönenberger, “Optogenetic alteration
of hippocampal network activity.” Institute of Science and Technology Austria,
2020.
ista: Csicsvari JL, Gridchyn I, Schönenberger P. 2020. Optogenetic alteration of
hippocampal network activity, Institute of Science and Technology Austria, 10.15479/AT:ISTA:8563.
mla: Csicsvari, Jozsef L., et al. Optogenetic Alteration of Hippocampal Network
Activity. Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:8563.
short: J.L. Csicsvari, I. Gridchyn, P. Schönenberger, (2020).
contributor:
- contributor_type: project_leader
first_name: Jozsef L
id: 3FA14672-F248-11E8-B48F-1D18A9856A87
last_name: Csicsvari
orcid: 0000-0002-5193-4036
corr_author: '1'
date_created: 2020-09-23T14:39:54Z
date_published: 2020-10-19T00:00:00Z
date_updated: 2026-04-07T08:37:11Z
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doi: 10.15479/AT:ISTA:8563
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oa: 1
oa_version: Published Version
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '8740'
relation: used_in_publication
status: public
status: public
title: Optogenetic alteration of hippocampal network activity
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: research_data
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2020'
...
---
_id: '7684'
article_processing_charge: No
article_type: original
author:
- first_name: Igor
full_name: Gridchyn, Igor
id: 4B60654C-F248-11E8-B48F-1D18A9856A87
last_name: Gridchyn
orcid: 0000-0002-1807-1929
- first_name: Philipp
full_name: Schönenberger, Philipp
id: 3B9D816C-F248-11E8-B48F-1D18A9856A87
last_name: Schönenberger
- 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: Gridchyn I, Schönenberger P, O’Neill J, Csicsvari JL. Assembly-specific disruption
of hippocampal replay leads to selective memory deficit. Neuron. 2020;106(2):291-300.e6.
doi:10.1016/j.neuron.2020.01.021
apa: Gridchyn, I., Schönenberger, P., O’Neill, J., & Csicsvari, J. L. (2020).
Assembly-specific disruption of hippocampal replay leads to selective memory deficit.
Neuron. Elsevier. https://doi.org/10.1016/j.neuron.2020.01.021
chicago: Gridchyn, Igor, Philipp Schönenberger, Joseph O’Neill, and Jozsef L Csicsvari.
“Assembly-Specific Disruption of Hippocampal Replay Leads to Selective Memory
Deficit.” Neuron. Elsevier, 2020. https://doi.org/10.1016/j.neuron.2020.01.021.
ieee: I. Gridchyn, P. Schönenberger, J. O’Neill, and J. L. Csicsvari, “Assembly-specific
disruption of hippocampal replay leads to selective memory deficit,” Neuron,
vol. 106, no. 2. Elsevier, p. 291–300.e6, 2020.
ista: Gridchyn I, Schönenberger P, O’Neill J, Csicsvari JL. 2020. Assembly-specific
disruption of hippocampal replay leads to selective memory deficit. Neuron. 106(2),
291–300.e6.
mla: Gridchyn, Igor, et al. “Assembly-Specific Disruption of Hippocampal Replay
Leads to Selective Memory Deficit.” Neuron, vol. 106, no. 2, Elsevier,
2020, p. 291–300.e6, doi:10.1016/j.neuron.2020.01.021.
short: I. Gridchyn, P. Schönenberger, J. O’Neill, J.L. Csicsvari, Neuron 106 (2020)
291–300.e6.
date_created: 2020-04-26T22:00:45Z
date_published: 2020-04-22T00:00:00Z
date_updated: 2026-04-16T09:29:06Z
day: '22'
department:
- _id: JoCs
doi: 10.1016/j.neuron.2020.01.021
ec_funded: 1
external_id:
isi:
- '000528268200013'
pmid:
- '32070475'
intvolume: ' 106'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.neuron.2020.01.021
month: '04'
oa: 1
oa_version: Published Version
page: 291-300.e6
pmid: 1
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
publication: Neuron
publication_identifier:
eissn:
- 1097-4199
issn:
- 0896-6273
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/librarian-of-memory/
scopus_import: '1'
status: public
title: Assembly-specific disruption of hippocampal replay leads to selective memory
deficit
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 106
year: '2020'
...
---
_id: '8557'
abstract:
- lang: eng
text: The infiltration of immune cells into tissues underlies the establishment
of tissue resident macrophages, and responses to infections and tumors. Yet the
mechanisms immune cells utilize to negotiate tissue barriers in living organisms
are not well understood, and a role for cortical actin has not been examined.
Here we find that the tissue invasion of Drosophila macrophages, also known as
plasmatocytes or hemocytes, utilizes enhanced cortical F-actin levels stimulated
by the Drosophila member of the fos proto oncogene transcription factor family
(Dfos, Kayak). RNA sequencing analysis and live imaging show that Dfos enhances
F-actin levels around the entire macrophage surface by increasing mRNA levels
of the membrane spanning molecular scaffold tetraspanin TM4SF, and the actin cross-linking
filamin Cheerio which are themselves required for invasion. Cortical F-actin levels
are critical as expressing a dominant active form of Diaphanous, a actin polymerizing
Formin, can rescue the Dfos Dominant Negative macrophage invasion defect. In vivo
imaging shows that Dfos is required to enhance the efficiency of the initial phases
of macrophage tissue entry. Genetic evidence argues that this Dfos-induced program
in macrophages counteracts the constraint produced by the tension of surrounding
tissues and buffers the mechanical properties of the macrophage nucleus from affecting
tissue entry. We thus identify tuning the cortical actin cytoskeleton through
Dfos as a key process allowing efficient forward movement of an immune cell into
surrounding tissues.
acknowledged_ssus:
- _id: LifeSc
acknowledgement: 'We thank the following for their contributions: The Drosophila Genomics
Resource Center supported by NIH grant 2P40OD010949-10A1 for plasmids, K. Brueckner.
B. Stramer, M. Uhlirova, O. Schuldiner, the Bloomington Drosophila Stock Center
supported by NIH grant P40OD018537 and the Vienna Drosophila Resource Center for
fly stocks, FlyBase (Thurmond et al., 2019) for essential genomic information, and
the BDGP in situ database for data (Tomancak et al., 2002, 2007). For antibodies,
we thank the Developmental Studies Hybridoma Bank, which was created by the Eunice
Kennedy Shriver National Institute of Child Health and Human Development of the
NIH, and is maintained at the University of Iowa, as well as J. Zeitlinger for her
generous gift of Dfos antibody. We thank the Vienna BioCenter Core Facilities for
RNA sequencing and analysis and the Life Scientific Service Units at IST Austria
for technical support and assistance with microscopy and FACS analysis. We thank
C.P. Heisenberg, P. Martin, M. Sixt and Siekhaus group members for discussions and
T.Hurd, A. Ratheesh and P. Rangan for comments on the manuscript. A.G. was supported
by the Austrian Science Fund (FWF) grant DASI_FWF01_P29638S, D.E.S. by Marie Curie
CIG 334077/IRTIM. M.S. is supported by the FWF, PhD program W1212 915 and the European
Research Council (ERC) Advanced grant (ERC-2015-AdG TNT-Tumors 694883). S.W. is
supported by an OEAW, DOC fellowship.'
article_processing_charge: No
author:
- first_name: Vera
full_name: Belyaeva, Vera
id: 47F080FE-F248-11E8-B48F-1D18A9856A87
last_name: Belyaeva
- first_name: Stephanie
full_name: Wachner, Stephanie
id: 2A95E7B0-F248-11E8-B48F-1D18A9856A87
last_name: Wachner
- first_name: Igor
full_name: Gridchyn, Igor
id: 4B60654C-F248-11E8-B48F-1D18A9856A87
last_name: Gridchyn
orcid: 0000-0002-1807-1929
- first_name: Markus
full_name: Linder, Markus
last_name: Linder
- 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: Maria
full_name: Sibilia, Maria
last_name: Sibilia
- 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: Belyaeva V, Wachner S, Gridchyn I, et al. Cortical actin properties controlled
by Drosophila Fos aid macrophage infiltration against surrounding tissue resistance.
bioRxiv. doi:10.1101/2020.09.18.301481
apa: Belyaeva, V., Wachner, S., Gridchyn, I., Linder, M., Emtenani, S., György,
A., … Siekhaus, D. E. (n.d.). Cortical actin properties controlled by Drosophila
Fos aid macrophage infiltration against surrounding tissue resistance. bioRxiv.
https://doi.org/10.1101/2020.09.18.301481
chicago: Belyaeva, Vera, Stephanie Wachner, Igor Gridchyn, Markus Linder, Shamsi
Emtenani, Attila György, Maria Sibilia, and Daria E Siekhaus. “Cortical Actin
Properties Controlled by Drosophila Fos Aid Macrophage Infiltration against Surrounding
Tissue Resistance.” BioRxiv, n.d. https://doi.org/10.1101/2020.09.18.301481.
ieee: V. Belyaeva et al., “Cortical actin properties controlled by Drosophila
Fos aid macrophage infiltration against surrounding tissue resistance,” bioRxiv.
.
ista: Belyaeva V, Wachner S, Gridchyn I, Linder M, Emtenani S, György A, Sibilia
M, Siekhaus DE. Cortical actin properties controlled by Drosophila Fos aid macrophage
infiltration against surrounding tissue resistance. bioRxiv, 10.1101/2020.09.18.301481.
mla: Belyaeva, Vera, et al. “Cortical Actin Properties Controlled by Drosophila
Fos Aid Macrophage Infiltration against Surrounding Tissue Resistance.” BioRxiv,
doi:10.1101/2020.09.18.301481.
short: V. Belyaeva, S. Wachner, I. Gridchyn, M. Linder, S. Emtenani, A. György,
M. Sibilia, D.E. Siekhaus, BioRxiv (n.d.).
corr_author: '1'
date_created: 2020-09-23T09:36:47Z
date_published: 2020-09-18T00:00:00Z
date_updated: 2026-04-28T22:30:47Z
day: '18'
department:
- _id: DaSi
- _id: JoCs
doi: 10.1101/2020.09.18.301481
ec_funded: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1101/2020.09.18.301481
month: '09'
oa: 1
oa_version: Preprint
project:
- _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: 26199CA4-B435-11E9-9278-68D0E5697425
grant_number: '24800'
name: Implications of a TGFβ/Dpp-activated subpopulation for Drosophila macrophage
migration
publication: bioRxiv
publication_status: draft
related_material:
record:
- id: '10614'
relation: later_version
status: public
- id: '8983'
relation: dissertation_contains
status: public
status: public
title: Cortical actin properties controlled by Drosophila Fos aid macrophage infiltration
against surrounding tissue resistance
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2020'
...
---
OA_place: publisher
_id: '48'
abstract:
- lang: eng
text: 'The hippocampus is a key brain region for spatial memory and navigation and
is needed at all stages of memory, including encoding, consolidation, and recall.
Hippocampal place cells selectively discharge at specific locations of the environment
to form a cognitive map of the space. During the rest period and sleep following
spatial navigation and/or learning, the waking activity of the place cells is
reactivated within high synchrony events. This reactivation is thought to be important
for memory consolidation and stabilization of the spatial representations. The
aim of my thesis was to directly test whether the reactivation content encoded
in firing patterns of place cells is important for consolidation of spatial memories.
In particular, I aimed to test whether, in cases when multiple spatial memory
traces are acquired during learning, the specific disruption of the reactivation
of a subset of these memories leads to the selective disruption of the corresponding
memory traces or through memory interference the other learned memories are disrupted
as well. In this thesis, using a modified cheeseboard paradigm and a closed-loop
recording setup with feedback optogenetic stimulation, I examined how the disruption
of the reactivation of specific spiking patterns affects consolidation of the
corresponding memory traces. To obtain multiple distinctive memories, animals
had to perform a spatial task in two distinct cheeseboard environments and the
reactivation of spiking patterns associated with one of the environments (target)
was disrupted after learning during four hours rest period using a real-time decoding
method. This real-time decoding method was capable of selectively affecting the
firing rates and cofiring correlations of the target environment-encoding cells.
The selective disruption led to behavioural impairment in the memory tests after
the rest periods in the target environment but not in the other undisrupted control
environment. In addition, the map of the target environment was less stable in
the impaired memory tests compared to the learning session before than the map
of the control environment. However, when the animal relearned the task, the same
map recurred in the target environment that was present during learning before
the disruption. Altogether my work demonstrated that the reactivation content
is important: assembly-related disruption of reactivation can lead to a selective
memory impairment and deficiency in map stability. These findings indeed suggest
that reactivated assembly patterns reflect processes associated with the consolidation
of memory traces. '
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Igor
full_name: Gridchyn, Igor
id: 4B60654C-F248-11E8-B48F-1D18A9856A87
last_name: Gridchyn
orcid: 0000-0002-1807-1929
citation:
ama: Gridchyn I. Reactivation content is important for consolidation of spatial
memory. 2018. doi:10.15479/AT:ISTA:th_1042
apa: Gridchyn, I. (2018). Reactivation content is important for consolidation
of spatial memory. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:th_1042
chicago: Gridchyn, Igor. “Reactivation Content Is Important for Consolidation of
Spatial Memory.” Institute of Science and Technology Austria, 2018. https://doi.org/10.15479/AT:ISTA:th_1042.
ieee: I. Gridchyn, “Reactivation content is important for consolidation of spatial
memory,” Institute of Science and Technology Austria, 2018.
ista: Gridchyn I. 2018. Reactivation content is important for consolidation of spatial
memory. Institute of Science and Technology Austria.
mla: Gridchyn, Igor. Reactivation Content Is Important for Consolidation of Spatial
Memory. Institute of Science and Technology Austria, 2018, doi:10.15479/AT:ISTA:th_1042.
short: I. Gridchyn, Reactivation Content Is Important for Consolidation of Spatial
Memory, Institute of Science and Technology Austria, 2018.
corr_author: '1'
date_created: 2018-12-11T11:44:21Z
date_published: 2018-08-27T00:00:00Z
date_updated: 2026-04-08T14:13:15Z
day: '27'
ddc:
- '573'
degree_awarded: PhD
department:
- _id: JoCs
doi: 10.15479/AT:ISTA:th_1042
file:
- access_level: closed
checksum: 7db4415e435590fa33542c7b0a0321d7
content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
creator: dernst
date_created: 2019-04-08T13:36:01Z
date_updated: 2021-02-11T23:30:22Z
embargo_to: open_access
file_id: '6236'
file_name: 2018_Thesis_Gridchyn_source.docx
file_size: 7666687
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creator: dernst
date_created: 2019-04-08T13:36:01Z
date_updated: 2021-02-11T11:17:18Z
embargo: 2019-08-29
file_id: '6237'
file_name: 2018_Thesis_Gridchyn.pdf
file_size: 6034153
relation: main_file
file_date_updated: 2021-02-11T23:30:22Z
has_accepted_license: '1'
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
page: '104'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
publist_id: '8006'
pubrep_id: '1042'
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: Reactivation content is important for consolidation of spatial memory
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: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2018'
...
---
_id: '2276'
abstract:
- lang: eng
text: The problem of minimizing the Potts energy function frequently occurs in computer
vision applications. One way to tackle this NP-hard problem was proposed by Kovtun
[19, 20]. It identifies a part of an optimal solution by running k maxflow computations,
where k is the number of labels. The number of “labeled” pixels can be significant
in some applications, e.g. 50-93% in our tests for stereo. We show how to reduce
the runtime to O (log k) maxflow computations (or one parametric maxflow computation).
Furthermore, the output of our algorithm allows to speed-up the subsequent alpha
expansion for the unlabeled part, or can be used as it is for time-critical applications.
To derive our technique, we generalize the algorithm of Felzenszwalb et al. [7]
for Tree Metrics . We also show a connection to k-submodular functions from combinatorial
optimization, and discuss k-submodular relaxations for general energy functions.
article_processing_charge: No
arxiv: 1
author:
- first_name: Igor
full_name: Gridchyn, Igor
id: 4B60654C-F248-11E8-B48F-1D18A9856A87
last_name: Gridchyn
orcid: 0000-0002-1807-1929
- first_name: Vladimir
full_name: Kolmogorov, Vladimir
id: 3D50B0BA-F248-11E8-B48F-1D18A9856A87
last_name: Kolmogorov
citation:
ama: 'Gridchyn I, Kolmogorov V. Potts model, parametric maxflow and k-submodular
functions. In: IEEE; 2013:2320-2327. doi:10.1109/ICCV.2013.288'
apa: 'Gridchyn, I., & Kolmogorov, V. (2013). Potts model, parametric maxflow
and k-submodular functions (pp. 2320–2327). Presented at the ICCV: International
Conference on Computer Vision, Sydney, Australia: IEEE. https://doi.org/10.1109/ICCV.2013.288'
chicago: Gridchyn, Igor, and Vladimir Kolmogorov. “Potts Model, Parametric Maxflow
and k-Submodular Functions,” 2320–27. IEEE, 2013. https://doi.org/10.1109/ICCV.2013.288.
ieee: 'I. Gridchyn and V. Kolmogorov, “Potts model, parametric maxflow and k-submodular
functions,” presented at the ICCV: International Conference on Computer Vision,
Sydney, Australia, 2013, pp. 2320–2327.'
ista: 'Gridchyn I, Kolmogorov V. 2013. Potts model, parametric maxflow and k-submodular
functions. ICCV: International Conference on Computer Vision, 2320–2327.'
mla: Gridchyn, Igor, and Vladimir Kolmogorov. Potts Model, Parametric Maxflow
and k-Submodular Functions. IEEE, 2013, pp. 2320–27, doi:10.1109/ICCV.2013.288.
short: I. Gridchyn, V. Kolmogorov, in:, IEEE, 2013, pp. 2320–2327.
conference:
end_date: 2013-12-08
location: Sydney, Australia
name: 'ICCV: International Conference on Computer Vision'
start_date: 2013-12-01
corr_author: '1'
date_created: 2018-12-11T11:56:43Z
date_published: 2013-12-01T00:00:00Z
date_updated: 2025-09-29T14:27:49Z
day: '01'
department:
- _id: JoCs
- _id: VlKo
doi: 10.1109/ICCV.2013.288
external_id:
arxiv:
- '1310.1771'
isi:
- '000351830500290'
isi: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1310.1771
month: '12'
oa: 1
oa_version: Preprint
page: 2320 - 2327
publication_status: published
publisher: IEEE
publist_id: '4668'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Potts model, parametric maxflow and k-submodular functions
type: conference
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
year: '2013'
...