Morphological analysis of CD15-immunoreactive neurons in the guinea pig retina

被引:3
作者
Kim, IB
Lee, EJ
Moon, JI
Chun, MH [1 ]
机构
[1] Catholic Univ Korea, Coll Med, Dept Anat, Seoul 137701, South Korea
[2] Catholic Univ Korea, Coll Med, Dept Ophthalmol, Seoul 137701, South Korea
关键词
CD15; GABA; colocalization; immunocytochemistry; retina; guinea pig;
D O I
10.1007/s004410100346
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Using immunocytochemistry, morphometry and electron microscopy, we have investigated the distribution and characteristics of CD15-immunoreactive (IR) neurons in the guinea pig retina. In the present study, two types of amacrine cells, including interplexiform cells in the inner nuclear layer (INL) and some cells in the ganglion cell layer (GCL), were labeled with anti-CD15 antisera. Type 1 amacrine cells had large somata located in the INL, with long and branched processes ramifying mainly in strata 4 and 5 of the inner plexiform layer (IPL). Somata of type 2 cells had smaller diameters, and were also located in the INL. Their processes stratified in stratum I. The densities of type 1 and type 2 amacrine cells increased from 152.8+/-36.7/mm(2) and 160.6+/-61.7/mm(2) in the peripheral retina, to 404.3+/- 41.5/mm(2) and 552.2+/-72.2/mm(2) in the central retina, respectively. Cells in the GCL exhibiting CD15 immunoreactivity were rarely observed. Colocalization experiments, using consecutive semi-thin sections, demonstrated that these CD15-IR amacrine cells exhibited gamma -aminobutyric acid (GABA) immunoreactivity. In addition, the processes of the type 1 cells formed one member of the postsynaptic dyads that are formed in the axon terminals of rod bipolar cells. Most of these processes made reciprocal synapses back to the axon terminals of the rod bipolar cells. Thus, CD15-IR amacrine cells constitute a subpopulation of GABAergic amacrine cells in the guinea pig retina, and the type 1 cells among them provide the inhibitory input to rod bipolar cells.
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页码:1 / 10
页数:10
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