Immunocytochemical localization of GABA, GABAA receptors, and synapse-associated proteins in the developing and adult ferret retina

Visual Neuroscience
A KarneR O Wong

Abstract

Gamma-aminobutyric acid (GABA) modulates the pattern of correlated spontaneous bursting activity between amacrine cells and ganglion cells of the ferret retina during the first postnatal month. Here, we demonstrate the presence of an anatomical network which may underlie these interactions throughout the period when correlated bursting activity is observed, by immunolabelling the neonatal ferret retina for GABA, GABAA receptors, and synapse-associated proteins. GABA immunoreactivity was detected in cell somata in the ganglion cell layer (GCL), in amacrine cells, and in the inner plexiform layer (IPL) by embryonic day 38. This pattern remained largely unchanged throughout neonatal development and in the adult. By contrast to other mammals, the outer plexiform layer (OPL) was only very weakly labelled for GABA, at all ages studied. Strong, punctate, immunolabelling for the beta 2/3 subunit of the GABAA receptor was apparent in the IPL by birth, and appeared in the OPL by the second postnatal week. The possibility that synaptic interactions in the IPL occur during bursting activity was examined by immunolabelling for synapse-associated proteins. Strong immunoreactivity for synaptic vesicle proteins, Synapsin I and II, and synaptic...Continue Reading

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Citations

Jul 20, 2002·Seminars in Cell & Developmental Biology·M Heather West GreenleeDonald S Sakaguchi
Jan 23, 2008·Proteome Science·Mina MizukamiYoshiaki Kiuchi
May 21, 1999·The European Journal of Neuroscience·P Koulen
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Oct 13, 2000·The European Journal of Neuroscience·A GrekaD Zhang
Dec 19, 2020·Frontiers in Cellular Neuroscience·Arlene A HiranoNicholas C Brecha

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