Multiple tumor suppressors regulate a hif-dependent negative feedback loop via ISGF3 in human clear cell renal cancer

Lili Liao, Zongzhi Z. Liu, Lauren Langbein, Weijia Cai, Eun Ah Cho, Jie Na, Xiaohua Niu, Wei Jiang, Zhijiu Zhong, Wesley L. Cai, Geetha Jagannathan, Essel Dulaimi, Joseph R. Testa, Robert G. Uzzo, Yuxin Wang, George R. Stark, Jianxin Sun, Stephen Peiper, Yaomin Xu, Qin YanHaifeng Yang

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Whereas VHL inactivation is a primary event in clear cell renal cell carcinoma (ccRCC), the precise mechanism(s) of how this interacts with the secondary mutations in tumor suppressor genes, including PBRM1, KDM5C/JARID1C, SETD2, and/or BAP1, remains unclear. Gene expression analyses reveal that VHL, PBRM1, or KDM5C share a common regulation of interferon response expression signature. Loss of HIF2a, PBRM1, or KDM5C in VHL-/-cells reduces the expression of interferon stimulated gene factor 3 (ISGF3), a transcription factor that regulates the interferon signature. Moreover, loss of SETD2 or BAP1 also reduces the ISGF3 level. Finally, ISGF3 is strongly tumor-suppressive in a xenograft model as its loss significantly enhances tumor growth. Conversely, reactivation of ISGF3 retards tumor growth by PBRM1-deficient ccRCC cells. Thus after VHL inactivation, HIF induces ISGF3, which is reversed by the loss of secondary tumor suppressors, suggesting that this is a key negative feedback loop in ccRCC.

Original languageEnglish (US)
Article numbere37925
JournaleLife
Volume7
DOIs
StatePublished - Oct 2018
Externally publishedYes

ASJC Scopus subject areas

  • General Neuroscience
  • General Biochemistry, Genetics and Molecular Biology
  • General Immunology and Microbiology

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