A G protein-coupled receptor is essential for Schwann cells to initiate myelination.
A G protein-coupled receptor is essential for Schwann cells to initiate myelination.
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DOI:
10.1126/science.1173474
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发表时间:
2009-09-11
期刊:
影响因子:
--
通讯作者:
Talbot WS
中科院分区:
文献类型:
--
作者:
Monk KR;Naylor SG;Glenn TD;Mercurio S;Perlin JR;Dominguez C;Moens CB;Talbot WS
The myelin sheath allows axons to rapidly conduct action potentials in the vertebrate nervous system. Incompletely understood axonal signals activate specific transcription factors, including Oct6 and Krox20, that initiate myelination in Schwann cells. Elevation of cAMP can mimic axonal contact in vitro, but the mechanisms that regulate cAMP levels in vivo are unknown. Using mutational analysis in zebrafish, we report that Gpr126 is required autonomously in Schwann cells for myelination. In gpr126 mutants, Schwann cells failed to express oct6 and krox20, and were arrested at the promyelinating stage. Elevation of cAMP in gpr126 mutants, but not krox20 mutants, could restore myelination. We propose that Gpr126 drives the differentiation of promyelinating Schwann cells by elevating cAMP levels, thereby triggering Oct6 expression and myelination.
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