DIFFERENTIAL SUBCELLULAR-DISTRIBUTION OF THE ALPHA-6 SUBUNIT VERSUS THE ALPHA-1 AND BETA-2/3 SUBUNITS OF THE GABAA/BENZODIAZEPINE RECEPTOR COMPLEX IN GRANULE CELLS OF THE CEREBELLAR CORTEX

被引:99
作者
BAUDE, A [1 ]
SEQUIER, JM [1 ]
MCKERNAN, RM [1 ]
OLIVIER, KR [1 ]
SOMOGYI, P [1 ]
机构
[1] MERCK SHARP & DOHME LTD, NEUROSCI RES CTR, DEPT BIOCHEM, HARLOW CM20 2QR, ENGLAND
关键词
D O I
10.1016/0306-4522(92)90513-2
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The distribution of the alpha6 subunit of the GABA(A) receptor has been established in rat cerebellum and compared to the distribution of the alpha1 (cat) and the beta2/3 (rat, cat) subunits, using immunocytochemistry. The synapses established by Golgi cell terminals on the dendrites of granule cells were immunoreactive for the alpha6, alpha1 and beta2/3 subunits in virtually all glomeruli, indicating that two variants (alpha1 and alpha6) of the same subunit are co-localized at the same synapses. The somatic membranes of the granule cells, which receive no synapses, were immunopositive for the alpha1 and beta2/3 subunits, but not for the alpha6 subunit. Thus, the alpha1 and the beta2/3 subunits are located at both synaptic and extrasynaptic sites, but the alpha6 subunit is detectable only at synaptic sites.
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页码:739 / 748
页数:10
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