The G protein α subunit Gαs is a tumor suppressor in Sonic hedgehog-driven medulloblastoma.
The G protein α subunit Gαs is a tumor suppressor in Sonic hedgehog-driven medulloblastoma.
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Medulloblastoma, the most common malignant childhood brain tumor, exhibits distinct molecular subtypes and cellular origins. Genetic alterations driving medulloblastoma initiation and progression remain poorly understood. Herein, we identify GNAS, encoding the G-protein Gsα, as a potent tumor suppressor gene that defines a subset of aggressive Sonic Hedgehog (Shh)-driven human medulloblastomas. Ablation of the single Gnas gene in anatomically-distinct progenitors is sufficient to induce Shh-associated medulloblastomas, which recapitulate their human counterparts. Gsα is highly enriched at the primary cilium of granule neuron precursors and suppresses Shh-signaling by regulating both the cAMP-dependent pathway and ciliary trafficking of Hedgehog pathway components. Elevation of a Gsα effector, cAMP, effectively inhibits tumor cell proliferation and progression in Gnas mutants. Thus, our gain- and loss-of-function studies identify a previously unrecognized tumor suppressor function for Gsα that acts as a molecular link across Shh-group medulloblastomas of disparate cellular and anatomical origins, illuminating G-protein modulation as a potential therapeutic avenue.
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影响因子:
--
作者:
Goetz, Sarah C.;Ocbina, Polloneal J. R.;Anderson, Kathryn V.
通讯作者:
Anderson, Kathryn V.
影响因子:
16.2
作者:
Lu, QR;Yuk, DI;Rowitch, DH
通讯作者:
Rowitch, DH
影响因子:
12.7
作者:
Grammel, Daniel;Warmuth-Metz, Monika;Schueller, Ulrich
通讯作者:
Schueller, Ulrich
影响因子:
3.1
作者:
Huh, Ji Young;Kwon, Min-Jung;Kim, Dong Hyun
通讯作者:
Kim, Dong Hyun
DOI:
10.1073/pnas.95.1.346
发表时间:
1998-01-06
影响因子:
11.1
作者:
Hohenegger, M;Waldhoer, M;Freissmuth, M
通讯作者:
Freissmuth, M