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GABA(A) presynaptic inhibition regulates the gain and kinetics of retinal output neurons
Output signals of neural circuits, including the retina, are shaped by a combination of excitatory and inhibitory signals. Inhibitory signals can act presynaptically on axon terminals to control neurotransmitter release and regulate circuit function. However, it has been difficult to study the role...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
eLife Sciences Publications, Ltd
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8110304/ https://www.ncbi.nlm.nih.gov/pubmed/33904401 http://dx.doi.org/10.7554/eLife.60994 |
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author | Nagy, Jenna Ebbinghaus, Briana Hoon, Mrinalini Sinha, Raunak |
author_facet | Nagy, Jenna Ebbinghaus, Briana Hoon, Mrinalini Sinha, Raunak |
author_sort | Nagy, Jenna |
collection | PubMed |
description | Output signals of neural circuits, including the retina, are shaped by a combination of excitatory and inhibitory signals. Inhibitory signals can act presynaptically on axon terminals to control neurotransmitter release and regulate circuit function. However, it has been difficult to study the role of presynaptic inhibition in most neural circuits due to lack of cell type-specific and receptor type-specific perturbations. In this study, we used a transgenic approach to selectively eliminate GABA(A) inhibitory receptors from select types of second-order neurons – bipolar cells – in mouse retina and examined how this affects the light response properties of the well-characterized ON alpha ganglion cell retinal circuit. Selective loss of GABA(A) receptor-mediated presynaptic inhibition causes an enhanced sensitivity and slower kinetics of light-evoked responses from ON alpha ganglion cells thus highlighting the role of presynaptic inhibition in gain control and temporal filtering of sensory signals in a key neural circuit in the mammalian retina. |
format | Online Article Text |
id | pubmed-8110304 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | eLife Sciences Publications, Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-81103042021-05-12 GABA(A) presynaptic inhibition regulates the gain and kinetics of retinal output neurons Nagy, Jenna Ebbinghaus, Briana Hoon, Mrinalini Sinha, Raunak eLife Neuroscience Output signals of neural circuits, including the retina, are shaped by a combination of excitatory and inhibitory signals. Inhibitory signals can act presynaptically on axon terminals to control neurotransmitter release and regulate circuit function. However, it has been difficult to study the role of presynaptic inhibition in most neural circuits due to lack of cell type-specific and receptor type-specific perturbations. In this study, we used a transgenic approach to selectively eliminate GABA(A) inhibitory receptors from select types of second-order neurons – bipolar cells – in mouse retina and examined how this affects the light response properties of the well-characterized ON alpha ganglion cell retinal circuit. Selective loss of GABA(A) receptor-mediated presynaptic inhibition causes an enhanced sensitivity and slower kinetics of light-evoked responses from ON alpha ganglion cells thus highlighting the role of presynaptic inhibition in gain control and temporal filtering of sensory signals in a key neural circuit in the mammalian retina. eLife Sciences Publications, Ltd 2021-04-27 /pmc/articles/PMC8110304/ /pubmed/33904401 http://dx.doi.org/10.7554/eLife.60994 Text en © 2021, Nagy et al https://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited. |
spellingShingle | Neuroscience Nagy, Jenna Ebbinghaus, Briana Hoon, Mrinalini Sinha, Raunak GABA(A) presynaptic inhibition regulates the gain and kinetics of retinal output neurons |
title | GABA(A) presynaptic inhibition regulates the gain and kinetics of retinal output neurons |
title_full | GABA(A) presynaptic inhibition regulates the gain and kinetics of retinal output neurons |
title_fullStr | GABA(A) presynaptic inhibition regulates the gain and kinetics of retinal output neurons |
title_full_unstemmed | GABA(A) presynaptic inhibition regulates the gain and kinetics of retinal output neurons |
title_short | GABA(A) presynaptic inhibition regulates the gain and kinetics of retinal output neurons |
title_sort | gaba(a) presynaptic inhibition regulates the gain and kinetics of retinal output neurons |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8110304/ https://www.ncbi.nlm.nih.gov/pubmed/33904401 http://dx.doi.org/10.7554/eLife.60994 |
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