期刊
CANCER LETTERS
卷 547, 期 -, 页码 -出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2022.215885
关键词
BAP1; STING; HIF; Interferon; ccRCC
类别
资金
- Kidney Cancer Research Alliance [KC200248, 5P30CA056036]
- NIH [KC200248]
- Department of Defense Kidney Cancer Research Program [5P30CA056036]
- Kidney Cancer Research Alliance (KCCure)
- VHL Alliance
- International Association of Heat and Frost Insulators and Allied Workers
- NCI [5R01CA155015]
In clear cell renal cell carcinomas (ccRCC), loss of BAP1 reduces type I interferon signaling, and reactivating this pathway may be a novel therapeutic strategy for treating this cancer.
BRCA1-associated protein 1 (BAP1) is a deubiquitinase that is mutated in 10-15% of clear cell renal cell carcinomas (ccRCC). Despite the association between BAP1 loss and poor clinical outcome, the critical tumor suppressor function(s) of BAP1 in ccRCC remains unclear. Previously, we found that hypoxia-inducible factor 2 alpha (HIF2 alpha) and BAP1 activate interferon-stimulated gene factor 3 (ISGF3), a transcription factor activated by type I interferons and a tumor suppressor in ccRCC xenograft models. Here, we aimed to determine the mechanism(s) through which HIF and BAP1 regulate ISGF3. We found that in ccRCC cells, loss of the von Hippel-Lindau tumor suppressor (VHL) activated interferon beta (IFN-beta) expression in a HIF2 alpha-dependent manner. IFN-beta was required for ISGF3 activation and suppressed the growth of Ren-02 tumors in xenografts. BAP1 enhanced the expression of IFN-beta and stimulator of interferon genes (STING), both of which activate ISGF3. Both ISGF3 overexpression and STING agonist treatment increased ISGF3 activity and suppressed BAP1-deficient tumor growth in Ren-02 xenografts. Our results indicate that BAP1 loss reduces type I interferon signaling, and reactivating this pathway may be a novel therapeutic strategy for treating ccRCC.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据