GLI3 Is Stabilized by SPOP Mutations and Promotes Castration Resistance via Functional Cooperation with Androgen Receptor in Prostate Cancer

Marieke Burleson, Janice J. Deng, Tai Qin, Thu Minh Duong, Yuqian Yan, Xiang Gu, Debodipta Das, Acarizia Easley, Michael A. Liss, P. Renee Yew, Roble Bedolla, Addanki Pratap Kumar, Tim Hui-Ming Huang, Yi Zou, Yidong Chen, Chun Liang Chen, Haojie Huang, Lu Zhe Sun, Thomas G. Boyer

Producción científica: Articlerevisión exhaustiva

13 Citas (Scopus)

Resumen

Although the Sonic hedgehog (SHH) signaling pathway has been implicated in promoting malignant phenotypes of prostate cancer, details on how it is activated and exerts its oncogenic role during prostate cancer development and progression is less clear. Here, we show that GLI3, a key SHH pathway effector, is transcriptionally upregulated during androgen deprivation and posttranslationally stabilized in prostate cancer cells by mutation of speckle-type POZ protein (SPOP). GLI3 is a substrate of SPOP-mediated proteasomal degradation in prostate cancer cells and prostate cancer driver mutations in SPOP abrogate GLI3 degradation. Functionally, GLI3 is necessary and sufficient for the growth and migration of androgen receptor (AR)-positive prostate cancer cells, particularly under androgen-depleted conditions. Importantly, we demonstrate that GLI3 physically interacts and functionally cooperates with AR to enrich an AR-dependent gene expression program leading to castration-resistant growth of xenografted prostate tumors. Finally, we identify an AR/GLI3 coregulated gene signature that is highly correlated with castration-resistant metastatic prostate cancer and predictive of disease recurrence. Together, these findings reveal that hyperactivated GLI3 promotes castration-resistant growth of prostate cancer and provide a rationale for therapeutic targeting of GLI3 in patients with castration-resistant prostate cancer (CRPC).

Idioma originalEnglish (US)
Páginas (desde-hasta)62-76
Número de páginas15
PublicaciónMolecular Cancer Research
Volumen20
N.º1
DOI
EstadoPublished - ene 2022

ASJC Scopus subject areas

  • General Medicine

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