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首页> 外文期刊>Biochemical Pharmacology >The GABA(B2) subunit is critical for the trafficking and function of native GABA(B) receptors.
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The GABA(B2) subunit is critical for the trafficking and function of native GABA(B) receptors.

机译:GABA(B2)亚基对于天然GABA(B)受体的运输和功能至关重要。

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Studies in heterologous systems have demonstrated that heterodimerisation of the two GABA(B) receptor subunits appears to be crucial for the trafficking and signalling of the receptor. Gene targeting of the GABA(B1) gene has demonstrated that the expression of GABA(B1) is essential for GABA(B) receptor function in the central nervous system (CNS). However, the contribution of the GABA(B2) subunit in the formation of native GABA(B) receptors is still unclear, in particular whether other proteins can substitute for this subunit. We have created a transgenic mouse in which the endogenous GABA(B2) gene has been mutated in order to express a C-terminally truncated version of the protein. As a result, the GABA(B1) subunit does not reach the cell surface and concomitantly both pre- and post-synaptic GABA(B) receptor functions are abolished. Taken together with previous gene deletion studies for the GABA(B1) subunit, this suggests that classical GABA(B) function in the brain is exclusively mediated by GABA(B1/2) heteromers.
机译:在异源系统中的研究表明,两个GABA(B)受体亚基的异二聚化对于该受体的运输和信号传导似乎至关重要。 GABA(B1)基因的基因靶向已证明,GABA(B1)的表达对于中枢神经系统(CNS)中的GABA(B)受体功能至关重要。但是,尚不清楚GABA(B2)亚基在天然GABA(B)受体形成中的贡献,特别是其他蛋白质是否可以代替该亚基。我们已经创建了一个转基因小鼠,其中的内源性GABA(B2)基因已经突变,以便表达该蛋白的C端截短版本。结果,GABA(B1)亚基没有到达细胞表面,因此,突触前和突触后GABA(B)受体功能均被取消。连同以前的GABA(B1)亚基基因删除研究一起,这表明大脑中的经典GABA(B)功能仅由GABA(B1 / 2)异聚体介导。

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