The oligodendrocyte-specific G protein-coupled receptor GPR17 is a cell-intrinsic timer of myelination.

The oligodendrocyte-specific G protein-coupled receptor GPR17 is a cell-intrinsic timer of myelination.
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DOI:
10.1038/nn.2410
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发表时间:
2009-11
影响因子:
25
通讯作者:
Lu, Q. Richard
Lu, Q. Richard
中科院分区:
医学1区
文献类型:
--
作者:
Chen, Ying;Wu, Heng;Wang, Shuzong;Koito, Hisami;Li, Jianrong;Ye, Feng;Hoang, Jenny;Escobar, Sabine S.;Gow, Alexander;Arnett, Heather A.;Trapp, Bruce D.;Karandikar, Nitin J.;Hsieh, Jenny;Lu, Q. Richard

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bHLH转录因子Olig 1促进少突胶质细胞成熟,是髓鞘修复所必需的。在这份报告中,我们描述了Olig 1调节的G蛋白偶联受体GPR 17,其功能是对抗Olig 1的作用。GPR 17仅限于少突胶质细胞谱系细胞,但在髓鞘形成的高峰期和成年期下调。在少突胶质细胞中持续表达GPR 17的转基因小鼠表现出CNS髓鞘形成障碍的刻板特征。GPR 17过表达抑制体内和体外少突胶质细胞分化和成熟。相反,GPR 17敲除小鼠显示出少突胶质细胞髓鞘形成的早期发作。GPR 17对少突胶质细胞成熟的相反作用至少部分地反映了有效的少突胶质细胞分化抑制剂ID 2/4的上调和核转位。总的来说,这些研究结果表明,GPR 17通过ID蛋白介导的负调控协调未成熟和髓鞘形成少突胶质细胞之间的过渡,并可能作为CNS髓鞘修复的潜在治疗靶点。
The bHLH transcription factor Olig1 promotes oligodendrocyte maturation and is required for myelin repair. In this report, we characterize an Olig1-regulated G-protein coupled receptor GPR17 whose function is to oppose the action of Olig1. GPR17 is restricted to oligodendrocyte lineage cells but downregulated during the peak period of myelination and in adulthood. Transgenic mice with sustained GPR17 expression in oligodendrocytes exhibit stereotypic features of myelinating disorders in the CNS. GPR17 overexpression inhibits oligodendrocyte differentiation and maturation both in vivo and in vitro. Conversely, GPR17 knockout mice display early onset of oligodendrocyte myelination. The opposing action of GPR17 on oligodendrocyte maturation reflects, at least partially, upregulation and nuclear translocation of the potent oligodendrocyte differentiation inhibitors ID2/4. Collectively, these findings suggest that GPR17 orchestrates the transition between immature and myelinating oligodendrocytes via an ID protein-mediated negative regulation, and may serve as a potential therapeutic target for CNS myelin repair.
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