中文摘要：

GABA水属于c族G蛋白偶联受体，是中枢神经细胞重要的抑制性神经递质受体。在体内GABAa_R由GBl和GB2两个基因编码，1998年以来研究者证实GABABR是由GBl和GB2形成的异二聚体，但近年来的研究表明，GBl也可以单独形成GBl-GBl同二聚体并在体内行使功能。本文系统介绍了GBl亚基的分类，在GB2存在或不存在时的表达，以及在GABAaR异二聚体和GBl．GBl同二聚体激活过程中所扮演的角色和生理功能；同时也展望了这些研究成果对于基础研究和药学研究的意义。关键词：GABA,~R：GBl：GB2：GBl．GBl同二聚体：激活机制

英文摘要：

GABABR belongs to the Class C G protein-coupled receptor, and it is important inhibitory neurotransmitter receptors in central nervous system. GABABR is encoding by two genes, GB1 and GB2, and researchers have confirmed that GABAB-R is heterodimer formed by GB1 and GB2 since 1998, but recent studies have shown that GB1 could form GB1-GB1 bomodimer in the absence of GB2 and exercise functions in vivo. In present systematically review the different splice variants of GB1, and its expression in the presence or absence of GB2, and its role in the activation process of GABABR heterodimer and GB1-GB1 homodimer as well as its physiologic effect in vivo; and also prospect the significance of the above studies in basic research and pharmacology.