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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...

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Autores principales: Nagy, Jenna, Ebbinghaus, Briana, Hoon, Mrinalini, Sinha, Raunak
Formato: Online Artículo Texto
Lenguaje:English
Publicado: eLife Sciences Publications, Ltd 2021
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.
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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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