---
_id: '1323'
abstract:
- lang: eng
text: Mossy fiber synapses on CA3 pyramidal cells are 'conditional detonators' that
reliably discharge postsynaptic targets. The 'conditional' nature implies that
burst activity in dentate gyrus granule cells is required for detonation. Whether
single unitary excitatory postsynaptic potentials (EPSPs) trigger spikes in CA3
neurons remains unknown. Mossy fiber synapses exhibit both pronounced short-term
facilitation and uniquely large post-tetanic potentiation (PTP). We tested whether
PTP could convert mossy fiber synapses from subdetonator into detonator mode,
using a recently developed method to selectively and noninvasively stimulate individual
presynaptic terminals in rat brain slices. Unitary EPSPs failed to initiate a
spike in CA3 neurons under control conditions, but reliably discharged them after
induction of presynaptic short-term plasticity. Remarkably, PTP switched mossy
fiber synapses into full detonators for tens of seconds. Plasticity-dependent
detonation may be critical for efficient coding, storage, and recall of information
in the granule cell–CA3 cell network.
acknowledged_ssus:
- _id: M-Shop
- _id: PreCl
article_number: e17977
author:
- first_name: Nicholas
full_name: Vyleta, Nicholas
id: 36C4978E-F248-11E8-B48F-1D18A9856A87
last_name: Vyleta
- 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: Vyleta N, Borges Merjane C, Jonas PM. Plasticity-dependent, full detonation
at hippocampal mossy fiber–CA3 pyramidal neuron synapses. eLife. 2016;5.
doi:10.7554/eLife.17977
apa: Vyleta, N., Borges Merjane, C., & Jonas, P. M. (2016). Plasticity-dependent,
full detonation at hippocampal mossy fiber–CA3 pyramidal neuron synapses. ELife.
eLife Sciences Publications. https://doi.org/10.7554/eLife.17977
chicago: Vyleta, Nicholas, Carolina Borges Merjane, and Peter M Jonas. “Plasticity-Dependent,
Full Detonation at Hippocampal Mossy Fiber–CA3 Pyramidal Neuron Synapses.” ELife.
eLife Sciences Publications, 2016. https://doi.org/10.7554/eLife.17977.
ieee: N. Vyleta, C. Borges Merjane, and P. M. Jonas, “Plasticity-dependent, full
detonation at hippocampal mossy fiber–CA3 pyramidal neuron synapses,” eLife,
vol. 5. eLife Sciences Publications, 2016.
ista: Vyleta N, Borges Merjane C, Jonas PM. 2016. Plasticity-dependent, full detonation
at hippocampal mossy fiber–CA3 pyramidal neuron synapses. eLife. 5, e17977.
mla: Vyleta, Nicholas, et al. “Plasticity-Dependent, Full Detonation at Hippocampal
Mossy Fiber–CA3 Pyramidal Neuron Synapses.” ELife, vol. 5, e17977, eLife
Sciences Publications, 2016, doi:10.7554/eLife.17977.
short: N. Vyleta, C. Borges Merjane, P.M. Jonas, ELife 5 (2016).
date_created: 2018-12-11T11:51:22Z
date_published: 2016-10-25T00:00:00Z
date_updated: 2023-02-21T10:34:24Z
day: '25'
ddc:
- '571'
- '572'
department:
- _id: PeJo
doi: 10.7554/eLife.17977
ec_funded: 1
file:
- access_level: open_access
checksum: a7201280c571bed88ebd459ce5ce6a47
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:17:05Z
date_updated: 2020-07-14T12:44:44Z
file_id: '5257'
file_name: IST-2016-715-v1+1_e17977-download.pdf
file_size: 1477891
relation: main_file
file_date_updated: 2020-07-14T12:44:44Z
has_accepted_license: '1'
intvolume: ' 5'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
project:
- _id: 25C0F108-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '268548'
name: Nanophysiology of fast-spiking, parvalbumin-expressing GABAergic interneurons
- _id: 25B7EB9E-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '692692'
name: Biophysics and circuit function of a giant cortical glumatergic synapse
publication: eLife
publication_status: published
publisher: eLife Sciences Publications
publist_id: '5947'
pubrep_id: '715'
quality_controlled: '1'
scopus_import: 1
status: public
title: Plasticity-dependent, full detonation at hippocampal mossy fiber–CA3 pyramidal
neuron synapses
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: 5
year: '2016'
...
---
_id: '2229'
abstract:
- lang: eng
text: The distance between Ca^2+ channels and release sensors determines the speed
and efficacy of synaptic transmission. Tight "nanodomain" channel-sensor
coupling initiates transmitter release at synapses in the mature brain, whereas
loose "microdomain" coupling appears restricted to early developmental
stages. To probe the coupling configuration at a plastic synapse in the mature
central nervous system, we performed paired recordings between mossy fiber terminals
and CA3 pyramidal neurons in rat hippocampus. Millimolar concentrations of both
the fast Ca^2+ chelator BAPTA [1,2-bis(2-aminophenoxy)ethane- N,N, N′,N′-tetraacetic
acid] and the slow chelator EGTA efficiently suppressed transmitter release, indicating
loose coupling between Ca^2+ channels and release sensors. Loose coupling enabled
the control of initial release probability by fast endogenous Ca^2+ buffers and
the generation of facilitation by buffer saturation. Thus, loose coupling provides
the molecular framework for presynaptic plasticity.
author:
- first_name: Nicholas
full_name: Vyleta, Nicholas
id: 36C4978E-F248-11E8-B48F-1D18A9856A87
last_name: Vyleta
- 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: Vyleta N, Jonas PM. Loose coupling between Ca^2+ channels and release sensors
at a plastic hippocampal synapse. Science. 2014;343(6171):665-670. doi:10.1126/science.1244811
apa: Vyleta, N., & Jonas, P. M. (2014). Loose coupling between Ca^2+ channels
and release sensors at a plastic hippocampal synapse. Science. American
Association for the Advancement of Science. https://doi.org/10.1126/science.1244811
chicago: Vyleta, Nicholas, and Peter M Jonas. “Loose Coupling between Ca^2+ Channels
and Release Sensors at a Plastic Hippocampal Synapse.” Science. American
Association for the Advancement of Science, 2014. https://doi.org/10.1126/science.1244811.
ieee: N. Vyleta and P. M. Jonas, “Loose coupling between Ca^2+ channels and release
sensors at a plastic hippocampal synapse,” Science, vol. 343, no. 6171.
American Association for the Advancement of Science, pp. 665–670, 2014.
ista: Vyleta N, Jonas PM. 2014. Loose coupling between Ca^2+ channels and release
sensors at a plastic hippocampal synapse. Science. 343(6171), 665–670.
mla: Vyleta, Nicholas, and Peter M. Jonas. “Loose Coupling between Ca^2+ Channels
and Release Sensors at a Plastic Hippocampal Synapse.” Science, vol. 343,
no. 6171, American Association for the Advancement of Science, 2014, pp. 665–70,
doi:10.1126/science.1244811.
short: N. Vyleta, P.M. Jonas, Science 343 (2014) 665–670.
date_created: 2018-12-11T11:56:27Z
date_published: 2014-02-01T00:00:00Z
date_updated: 2021-01-12T06:56:09Z
day: '01'
department:
- _id: PeJo
doi: 10.1126/science.1244811
ec_funded: 1
intvolume: ' 343'
issue: '6171'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3617475/
month: '02'
oa: 1
oa_version: Submitted Version
page: 665 - 670
project:
- _id: 25C26B1E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P24909-B24
name: Mechanisms of transmitter release at GABAergic synapses
- _id: 25C0F108-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '268548'
name: Nanophysiology of fast-spiking, parvalbumin-expressing GABAergic interneurons
publication: Science
publication_identifier:
issn:
- '00368075'
publication_status: published
publisher: American Association for the Advancement of Science
publist_id: '4732'
quality_controlled: '1'
scopus_import: 1
status: public
title: Loose coupling between Ca^2+ channels and release sensors at a plastic hippocampal
synapse
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 343
year: '2014'
...
---
_id: '3121'
abstract:
- lang: eng
text: Voltage-activated Ca(2+) channels (VACCs) mediate Ca(2+) influx to trigger
action potential-evoked neurotransmitter release, but the mechanism by which Ca(2+)
regulates spontaneous transmission is unclear. We found that VACCs are the major
physiological triggers for spontaneous release at mouse neocortical inhibitory
synapses. Moreover, despite the absence of a synchronizing action potential, we
found that spontaneous fusion of a GABA-containing vesicle required the activation
of multiple tightly coupled VACCs of variable type.
acknowledgement: "The work was supported by the US National Institutes of Health (DA027110
and GM097433) and OCTRI. C.W. and N.P.V. were supported by a grant from the National
Heart, Lung, and Blood Institute (T32HL033808).\r\nWe thank M. Andresen and K. Khodakhah
for helpful comments. "
author:
- first_name: Courtney
full_name: Williams, Courtney
last_name: Williams
- first_name: Wenyan
full_name: Chen, Wenyan
last_name: Chen
- first_name: Chia
full_name: Lee, Chia
last_name: Lee
- first_name: Daniel
full_name: Yaeger, Daniel
last_name: Yaeger
- first_name: Nicholas
full_name: Vyleta, Nicholas
id: 36C4978E-F248-11E8-B48F-1D18A9856A87
last_name: Vyleta
- first_name: Stephen
full_name: Smith, Stephen
last_name: Smith
citation:
ama: Williams C, Chen W, Lee C, Yaeger D, Vyleta N, Smith S. Coactivation of multiple
tightly coupled calcium channels triggers spontaneous release of GABA. Nature
Neuroscience. 2012;15(9):1195-1197. doi:10.1038/nn.3162
apa: Williams, C., Chen, W., Lee, C., Yaeger, D., Vyleta, N., & Smith, S. (2012).
Coactivation of multiple tightly coupled calcium channels triggers spontaneous
release of GABA. Nature Neuroscience. Nature Publishing Group. https://doi.org/10.1038/nn.3162
chicago: Williams, Courtney, Wenyan Chen, Chia Lee, Daniel Yaeger, Nicholas Vyleta,
and Stephen Smith. “Coactivation of Multiple Tightly Coupled Calcium Channels
Triggers Spontaneous Release of GABA.” Nature Neuroscience. Nature Publishing
Group, 2012. https://doi.org/10.1038/nn.3162.
ieee: C. Williams, W. Chen, C. Lee, D. Yaeger, N. Vyleta, and S. Smith, “Coactivation
of multiple tightly coupled calcium channels triggers spontaneous release of GABA,”
Nature Neuroscience, vol. 15, no. 9. Nature Publishing Group, pp. 1195–1197,
2012.
ista: Williams C, Chen W, Lee C, Yaeger D, Vyleta N, Smith S. 2012. Coactivation
of multiple tightly coupled calcium channels triggers spontaneous release of GABA.
Nature Neuroscience. 15(9), 1195–1197.
mla: Williams, Courtney, et al. “Coactivation of Multiple Tightly Coupled Calcium
Channels Triggers Spontaneous Release of GABA.” Nature Neuroscience, vol.
15, no. 9, Nature Publishing Group, 2012, pp. 1195–97, doi:10.1038/nn.3162.
short: C. Williams, W. Chen, C. Lee, D. Yaeger, N. Vyleta, S. Smith, Nature Neuroscience
15 (2012) 1195–1197.
date_created: 2018-12-11T12:01:30Z
date_published: 2012-09-01T00:00:00Z
date_updated: 2021-01-12T07:41:12Z
day: '01'
department:
- _id: PeJo
doi: 10.1038/nn.3162
external_id:
pmid:
- '22842148'
intvolume: ' 15'
issue: '9'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3431448/
month: '09'
oa: 1
oa_version: Submitted Version
page: 1195 - 1197
pmid: 1
publication: Nature Neuroscience
publication_status: published
publisher: Nature Publishing Group
publist_id: '3578'
quality_controlled: '1'
scopus_import: 1
status: public
title: Coactivation of multiple tightly coupled calcium channels triggers spontaneous
release of GABA
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 15
year: '2012'
...
---
_id: '469'
abstract:
- lang: eng
text: 'Spontaneous release of glutamate is important for maintaining synaptic strength
and controlling spike timing in the brain. Mechanisms regulating spontaneous exocytosis
remain poorly understood. Extracellular calcium concentration ([Ca2+]o) regulates
Ca2+ entry through voltage-activated calcium channels (VACCs) and consequently
is a pivotal determinant of action potential-evoked vesicle fusion. Extracellular
Ca 2+ also enhances spontaneous release, but via unknown mechanisms. Here we report
that external Ca2+ triggers spontaneous glutamate release more weakly than evoked
release in mouse neocortical neurons. Blockade of VACCs has no effect on the spontaneous
release rate or its dependence on [Ca2+]o. Intracellular [Ca2+] slowly increases
in a minority of neurons following increases in [Ca2+]o. Furthermore, the enhancement
of spontaneous release by extracellular calcium is insensitive to chelation of
intracellular calcium by BAPTA. Activation of the calcium-sensing receptor (CaSR),
a G-protein-coupled receptor present in nerve terminals, by several specific agonists
increased spontaneous glutamate release. The frequency of spontaneous synaptic
transmission was decreased in CaSR mutant neurons. The concentration-effect relationship
for extracellular calcium regulation of spontaneous release was well described
by a combination of CaSR-dependent and CaSR-independent mechanisms. Overall these
results indicate that extracellular Ca2+ does not trigger spontaneous glutamate
release by simply increasing calcium influx but stimulates CaSR and thereby promotes
resting spontaneous glutamate release. '
author:
- first_name: Nicholas
full_name: Vyleta, Nicholas
id: 36C4978E-F248-11E8-B48F-1D18A9856A87
last_name: Vyleta
- first_name: Stephen
full_name: Smith, Stephen
last_name: Smith
citation:
ama: Vyleta N, Smith S. Spontaneous glutamate release is independent of calcium
influx and tonically activated by the calcium-sensing receptor. European Journal
of Neuroscience. 2011;31(12):4593-4606. doi:10.1523/JNEUROSCI.6398-10.2011
apa: Vyleta, N., & Smith, S. (2011). Spontaneous glutamate release is independent
of calcium influx and tonically activated by the calcium-sensing receptor. European
Journal of Neuroscience. Wiley-Blackwell. https://doi.org/10.1523/JNEUROSCI.6398-10.2011
chicago: Vyleta, Nicholas, and Stephen Smith. “Spontaneous Glutamate Release Is
Independent of Calcium Influx and Tonically Activated by the Calcium-Sensing Receptor.”
European Journal of Neuroscience. Wiley-Blackwell, 2011. https://doi.org/10.1523/JNEUROSCI.6398-10.2011.
ieee: N. Vyleta and S. Smith, “Spontaneous glutamate release is independent of calcium
influx and tonically activated by the calcium-sensing receptor,” European Journal
of Neuroscience, vol. 31, no. 12. Wiley-Blackwell, pp. 4593–4606, 2011.
ista: Vyleta N, Smith S. 2011. Spontaneous glutamate release is independent of calcium
influx and tonically activated by the calcium-sensing receptor. European Journal
of Neuroscience. 31(12), 4593–4606.
mla: Vyleta, Nicholas, and Stephen Smith. “Spontaneous Glutamate Release Is Independent
of Calcium Influx and Tonically Activated by the Calcium-Sensing Receptor.” European
Journal of Neuroscience, vol. 31, no. 12, Wiley-Blackwell, 2011, pp. 4593–606,
doi:10.1523/JNEUROSCI.6398-10.2011.
short: N. Vyleta, S. Smith, European Journal of Neuroscience 31 (2011) 4593–4606.
date_created: 2018-12-11T11:46:39Z
date_published: 2011-03-23T00:00:00Z
date_updated: 2021-01-12T08:00:49Z
day: '23'
department:
- _id: PeJo
doi: 10.1523/JNEUROSCI.6398-10.2011
intvolume: ' 31'
issue: '12'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3097128/
month: '03'
oa: 1
oa_version: Submitted Version
page: 4593 - 4606
publication: European Journal of Neuroscience
publication_status: published
publisher: Wiley-Blackwell
publist_id: '7353'
quality_controlled: '1'
scopus_import: 1
status: public
title: Spontaneous glutamate release is independent of calcium influx and tonically
activated by the calcium-sensing receptor
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 31
year: '2011'
...