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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Dopamine responsiveness is regulated by targeted sorting of D2 receptors
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Dopamine responsiveness is regulated by targeted sorting of D2 receptors

机译:多巴胺反应性受D2受体的靶向分选调节

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摘要

Aberrant dopaminergic signaling is a critical determinant in multiple psychiatric disorders, and in many disease states, dopamine receptor number is altered. Here we identify a molecular mechanism that selectively targets D2 receptors for degradation after their activation by dopamine. The degradative fate of D2 receptors is determined by an interaction with G protein coupled receptor-associated sorting protein (GASP). As a consequence of this GASP interaction, D2 responses in rat brain fail to resensitize after agonist treatment. Disruption of the D2-GASP interaction facilitates recovery of D2 responses, suggesting that modulation of the D2-GASP interaction is important for the functional down-regulation of D2 receptors.
机译:多巴胺能异常信号是多种精神病的关键决定因素,在许多疾病中,多巴胺受体的数量都会改变。在这里,我们确定了一种分子机制,该机制选择性地靶向D2受体被多巴胺激活后降解。 D2受体的降解命运取决于与G蛋白偶联受体相关分选蛋白(GASP)的相互作用。这种GASP相互作用的结果是,激动剂治疗后,大鼠大脑中的D2反应无法重新敏感。 D2-GASP相互作用的破坏促进了D2反应的恢复,这表明D2-GASP相互作用的调节对于D2受体的功能下调很重要。

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