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Chen, Jianhua; Jian, Xuemin; Deng, Siyu; Ma, Zengyi; Shou, Xuefei; Shen, Yue; Zhang, Qilin; Song, Zhijian; Li, Zhiqiang; Peng, Hong; Peng, Cheng; Chen, Min; Luo, Cheng; Zhao, Dan; Ye, Zhao; Shen, Ming; Zhang, Yichao; Zhou, Juan; Fahira, Aamir; Wang, Yongfei; Li, Shiqi; Zhang, Zhaoyun; Ye, Hongying; Li, Yiming; Shen, Jiawei; Chen, Hong; Tang, Feng; Yao, Zhenwei; Shi, Zhifeng; Chen, Chunjui; Xie, Lu; Wang, Ye; Fu, Chaowei; Mao, Ying; Zhou, Liangfu; Gao, Daming; Yan, Hai; Zhao, Yao; Huang, Chuanxin; Shi, Yongyong
Nature communications, 08/2018, Letnik: 9, Številka: 1Journal Article
Cushing's disease results from corticotroph adenomas of the pituitary that hypersecrete adrenocorticotropin (ACTH), leading to excess glucocorticoid and hypercortisolism. Mutations of the deubiquitinase gene USP8 occur in 35-62% of corticotroph adenomas. However, the major driver mutations in USP8 wild-type tumors remain elusive. Here, we report recurrent mutations in the deubiquitinase gene USP48 (predominantly encoding p.M415I or p.M415V; 21/91 subjects) and BRAF (encoding p.V600E; 15/91 subjects) in corticotroph adenomas with wild-type USP8. Similar to USP8 mutants, both USP48 and BRAF mutants enhance the promoter activity and transcription of the gene encoding proopiomelanocortin (POMC), which is the precursor of ACTH, providing a potential mechanism for ACTH overproduction in corticotroph adenomas. Moreover, primary corticotroph tumor cells harboring BRAF V600E are sensitive to the BRAF inhibitor vemurafenib. Our study thus contributes to the understanding of the molecular mechanism of the pathogenesis of corticotroph adenoma and informs therapeutic targets for this disease.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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