GABA expression and regulation by sensory experience in the developing visual system

Miraucourt, L. S., da Silva, J. S., Burgos, K., Li, J., Abe, H., Ruthazer, E. S., Cline, H. T. (January 2012) GABA expression and regulation by sensory experience in the developing visual system. PLoS ONE, 7 (1). ISSN 19326203 (ISSN)

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URL: http://www.ncbi.nlm.nih.gov/pubmed/22242157
DOI: 10.1371/journal.pone.0029086

Abstract

The developing retinotectal system of the Xenopus laevis tadpole is a model of choice for studying visual experience-dependent circuit maturation in the intact animal. The neurotransmitter gamma-aminobutyric acid (GABA) has been shown to play a critical role in the formation of sensory circuits in this preparation, however a comprehensive neuroanatomical study of GABAergic cell distribution in the developing tadpole has not been conducted. We report a detailed description of the spatial expression of GABA immunoreactivity in the Xenopus laevis tadpole brain at two key developmental stages: stage 40/42 around the onset of retinotectal innervation and stage 47 when the retinotectal circuit supports visually-guided behavior. During this period, GABAergic neurons within specific brain structures appeared to redistribute from clusters of neuronal somata to a sparser, more uniform distribution. Furthermore, we found that GABA levels were regulated by recent sensory experience. Both ELISA measurements of GABA concentration and quantitative analysis of GABA immunoreactivity in tissue sections from the optic tectum show that GABA increased in response to a 4 hr period of enhanced visual stimulation in stage 47 tadpoles. These observations reveal a remarkable degree of adaptability of GABAergic neurons in the developing brain, consistent with their key contributions to circuit development and function. © 2012 Miraucourt et al.

Item Type: Paper
Subjects: organism description > animal > Frog
bioinformatics > genomics and proteomics > small molecules > GABA
organism description > animal
organs, tissues, organelles, cell types and functions
organs, tissues, organelles, cell types and functions > tissues types and functions
organs, tissues, organelles, cell types and functions > tissues types and functions > visual cortex
organism description > animal > Frog > xenopus
CSHL Authors:
Communities: CSHL labs > Cline lab
Depositing User: Matt Covey
Date: January 2012
Date Deposited: 30 Jan 2013 15:20
Last Modified: 30 Jan 2013 15:20
PMCID: PMC3252287
Related URLs:
URI: http://repository.cshl.edu/id/eprint/27002

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