5-HT1D RECEPTORS IN THE GUINEA-PIG BRAIN - PRESYNAPTIC AND POSTSYNAPTIC LOCALIZATIONS IN THE STRIATONIGRAL PATHWAY

被引:38
作者
WAEBER, C [1 ]
ZHANG, L [1 ]
PALACIOS, JM [1 ]
机构
[1] SANDOZ LTD,PRECLIN RES,CH-4002 BASEL,SWITZERLAND
关键词
Autoradiography; Guinea pig brain; Lesion; Serotoninergic (5-HT[!sub]1D[!/sub]) receptor; Striatum; Substantia nigra;
D O I
10.1016/0006-8993(90)91658-4
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The caudate-putamen, globus pallidus and substantia nigra pars reticulata of the guinea pig contain high densities of the 5-HT1D receptor subtype. The cellular localization of these sites in the striatonigral pathway was investigated using receptor autoradiography and selective neurotoxin lesions. In guinea pigs with unilateral 6-hydroxydopamine lesions of the nigral dopaminergic cells, no significant decrease was observed in any of the components of the striatonigral pathway. In contrast, when quinolinic acid was injected in the caudate-putamen, marked reductions in [3H]5-HT binding were seen in the caudate-putamen, the globus pallidus and the substantia nigra pars reticulata, on the side ipsilateral to the lesion. These data, which are comparable to previous results in human pathologies where similar cell populations are known to degenerate (Parkinson disease and Huntington's chorea), indicate a presynaptic localization of 5-HT1D receptors on the terminals of the striatal neurons projecting to the pars reticulata of the substantia nigra. In addition, these receptors could be located on the cell bodies or dendrites of these neurons in the striatum, postsynaptically to serotoninergic fibers. © 1990.
引用
收藏
页码:197 / 206
页数:10
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