1. Integrated Molecular Characterization of Fumarate Hydratase–deficient Renal Cell Carcinoma
- Author
-
Jindong Dai, Banghua Liao, Pengfei Shen, Xiaoxue Yin, Sha Zhu, Tianhai Lin, Ji-Yan Liu, Haoran Zhang, Zhipeng Wang, Xudong Zhu, Xiuyi Pan, Cameron M. Armstrong, Qiang Wei, Ni Chen, Jin Yao, Zhiping Li, Ling Nie, Haojie Huang, Xiang Li, Junru Chen, Yuntian Chen, Yuchao Ni, Wei Lin, Dan Qin, Jinge Zhao, Jianhui Chen, Jiandong Liu, Rui Huang, Linmao Zheng, Qiao Zhou, Xingming Zhang, Yali Shen, Hao Zeng, Zhenhua Liu, Guangxi Sun, Jiayu Liang, Ling Yang, and Mengni Zhang
- Subjects
Adult ,Male ,0301 basic medicine ,Cancer Research ,Adolescent ,Somatic cell ,Biology ,Epigenesis, Genetic ,Fumarate Hydratase ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Germline mutation ,Renal cell carcinoma ,Biomarkers, Tumor ,medicine ,Humans ,Neoplasm Metastasis ,Carcinoma, Renal Cell ,Immune Checkpoint Inhibitors ,Aged ,Retrospective Studies ,Epigenomics ,Methylation ,DNA Methylation ,Middle Aged ,Prognosis ,medicine.disease ,Kidney Neoplasms ,Immune checkpoint ,Gene Expression Regulation, Neoplastic ,Survival Rate ,030104 developmental biology ,Oncology ,CpG site ,030220 oncology & carcinogenesis ,Mutation ,DNA methylation ,Cancer research ,Female ,Follow-Up Studies - Abstract
Purpose: Fumarate hydratase–deficient renal cell carcinoma (FH-deficient RCC) is a rare but lethal subtype of RCC. Little is known about the genomic profile of FH-deficient RCC, and the therapeutic options for advanced disease are limited. To this end, we performed a comprehensive genomics study to characterize the genomic and epigenomic features of FH-deficient RCC. Experimental Design: Integrated genomic, epigenomic, and molecular analyses were performed on 25 untreated primary FH-deficient RCCs. Complete clinicopathologic and follow-up data of these patients were recorded. Results: We identified that FH-deficient RCC manifested low somatic mutation burden (median 0.58 mutations per megabase), but with frequent somatic copy-number alterations. The majority of FH-deficient RCCs were characterized by a CpG sites island methylator phenotype, displaying concerted hypermethylation at numerous CpG sites in genes of transcription factors, tumor suppressors, and tumor hallmark pathways. However, a few cases (20%) with low metastatic potential showed relatively low DNA methylation levels, indicating the heterogeneity of methylation pattern in FH-deficient RCC. Moreover, FH-deficient RCC is potentially highly immunogenic, characterized by increased tumor T-cell infiltration but high expression of immune checkpoint molecules in tumors. Clinical data further demonstrated that patients receiving immune checkpoint blockade–based treatment achieved improved progression-free survival over those treated with antiangiogenic monotherapy (median, 13.3 vs. 5.1 months; P = 0.03). Conclusions: These results reveal the genomic features and provide new insight into potential therapeutic strategies for FH-deficient RCC.
- Published
- 2021
- Full Text
- View/download PDF