The integrated genomic and epigenomic landscape of brainstem glioma

Lee H Chen, Changcun Pan, Bill H Diplas, Cheng Xu, Landon J Hansen, Yuliang Wu, Xin Chen, Yibo Geng, Tao Sun, Yu Sun, Peng Zhang, Zhen Wu, Junting Zhang, Deling Li, Yang Zhang, Wenhao Wu, Yu Wang, Guangyu Li, Jie Yang, Xiaoyue Wang, Ce Xu, Sizhen Wang, Matthew S Waitkus, Yiping He, Roger E McLendon, David M Ashley, Hai Yan, Liwei Zhang
Nature Communications 2020 June 17, 11 (1): 3077
Brainstem gliomas are a heterogeneous group of tumors that encompass both benign tumors cured with surgical resection and highly lethal cancers with no efficacious therapies. We perform a comprehensive study incorporating epigenetic and genomic analyses on a large cohort of brainstem gliomas, including Diffuse Intrinsic Pontine Gliomas. Here we report, from DNA methylation data, distinct clusters termed H3-Pons, H3-Medulla, IDH, and PA-like, each associated with unique genomic and clinical profiles. The majority of tumors within H3-Pons and-H3-Medulla harbors H3F3A mutations but shows distinct methylation patterns that correlate with anatomical localization within the pons or medulla, respectively. Clinical data show significantly different overall survival between these clusters, and pathway analysis demonstrates different oncogenic mechanisms in these samples. Our findings indicate that the integration of genetic and epigenetic data can facilitate better understanding of brainstem gliomagenesis and classification, and guide future studies for the development of novel treatments for this disease.

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