Cilia-Associated Oxysterols Activate Smoothened.

Cilia-Associated Oxysterols Activate Smoothened.
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纤毛相关的氧甲醇激活平滑。

DOI:
10.1016/j.molcel.2018.08.034
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发表时间:
2018-10-18
期刊:
影响因子:
16
通讯作者:
Reiter JF
Reiter JF
中科院分区:
生物学1区
文献类型:
--
作者:
Raleigh DR;Sever N;Choksi PK;Sigg MA;Hines KM;Thompson BM;Elnatan D;Jaishankar P;Bisignano P;Garcia-Gonzalo FR;Krup AL;Eberl M;Byrne EFX;Siebold C;Wong SY;Renslo AR;Grabe M;McDonald JG;Xu L;Beachy PA;Reiter JF

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Primary cilia are required for Smoothened to transduce vertebrate Hedgehog signals, but how Smoothened accumulates in cilia and is activated is incompletely understood. Here, we identify cilia-associated oxysterols that promote Smoothened accumulation in cilia and activate the Hedgehog pathway. Our data reveal that cilia-associated oxysterols bind to two distinct Smoothened domains to modulate Smoothened accumulation in cilia and tune the intensity of Hedgehog pathway activation. We find that the oxysterol synthase HSD11β2 participates in the production of Smoothened-activating oxysterols and promotes Hedgehog pathway activity. Inhibiting oxysterol biosynthesis impedes oncogenic Hedgehog pathway activation and attenuates the growth of Hedgehog pathway-associated medulloblastoma, suggesting that targeted inhibition of Smoothened activating oxysterol production may be therapeutically useful for patients with Hedgehog-associated cancers.
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