GABA-LIKE IMMUNOREACTIVE CELLS CONTAINING NICOTINIC ACETYLCHOLINE-RECEPTORS IN THE CHICK RETINA

被引:28
作者
HAMASSAKIBRITTO, DE [1 ]
BRZOZOWSKAPRECHTL, A [1 ]
KARTEN, HJ [1 ]
LINDSTROM, JM [1 ]
KEYSER, KT [1 ]
机构
[1] UNIV PENN,INST NEUROL SCI,PHILADELPHIA,PA 19104
关键词
GANGLION CELLS; AMACRINE CELLS; NEUROTRANSMITTERS; RECEPTOR SUBUNITS;
D O I
10.1002/cne.903130213
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The possibility that GABA-like immunoreactive cells of the chick retina also contain neuronal nicotinic acetylcholine receptors was investigated by means of immunohistochemical techniques. Double-labeled cell bodies containing GABA-like immunoreactivity and nicotinic receptor-like immunoreactivity were seen in the inner third of the inner nuclear layer and were presumably amacrine cells. Approximately 29-36% of the GABA-positive cells in the inner nuclear layer contained nicotinic receptor immunoreactivity. Their soma sizes ranged from 5-12-mu-m. Some double-labeled cells ranging from 7-21-mu-m were observed in the ganglion cell layer as well. Between 9-37% of the GABA-positive cells in this layer contained nicotinic receptor-like immunoreactivity. Following injection of a retrograde tracer into the optic tectum, some of the retrogradely labeled cells were also double labeled with antibodies against GABA and nicotinic receptors. This indicates that at least some of the GABA-positive cells containing nicotinic acetylcholine receptors in the ganglion cell layer are indeed ganglion cells. The present data appear to represent the first demonstration of the presence of acetylcholine receptors in GABA-containing cells in the retina, thus providing a basis for a possible influence of acetylcholine upon those presumptive GABAergic cells.
引用
收藏
页码:394 / 408
页数:15
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