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• W3154268917 abstract "Abstract Many primary tumor sub-regions have low levels of molecular oxygen, termed hypoxia. Hypoxic tumors are at elevated risk for local failure and distant metastasis, but the molecular hallmarks of tumor hypoxia remain poorly defined. To fill this gap, we quantified hypoxia in 8,006 tumors across 19 tumor types. In ten tumor types, hypoxia was associated with elevated genomic instability. In all 19 tumor types, hypoxic tumors exhibited characteristic driver mutation signatures. We observed widespread hypoxia-associated dysregulation of miRNAs across cancers and functionally validated miR-133a-3p as a hypoxia-modulated miRNA. In localized prostate cancer, hypoxia was associated with elevated rates of chromothripsis, allelic loss of PTEN and shorter telomeres. These associations are particularly enriched in polyclonal tumors, representing a constellation of features resembling tumor nimbosus – an aggressive cellular phenotype. Overall, this work establishes that tumor hypoxia may drive aggressive molecular features across cancers and shape the clinical trajectory of individual tumors. Citation Format: Vinayak Bhandari, Christianne Hoey, Lydia Liu, Emilie Lalonde, Jessica Ray, Julie Livingstone, Robert Lesurf, Yu-Jia Shiah, Tina Vujcic, Xiaoyong Huang, Shadrielle M.G. Espiritu, Lawrence E. Heisler, Fouad Yousif, Vincent Huang, Takafumi N. Yamaguchi, Cindy Q. Yao, Veronica Y. Sabelnykova, Michael Fraser, Melvin L.K. Chua, Theodorus van der Kwast, Stanley K. Liu, Paul C. Boutros, Robert G. Bristow. Molecular landmarks of tumor hypoxia across cancer types [abstract]. In: Proceedings of the AACR Virtual Special Conference on Radiation Science and Medicine; 2021 Mar 2-3. Philadelphia (PA): AACR; Clin Cancer Res 2021;27(8_Suppl):Abstract nr IA-018." @default.
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• W3154268917 date "2021-04-15" @default.
• W3154268917 modified "2023-10-14" @default.
• W3154268917 title "Abstract IA-018: Molecular landmarks of tumor hypoxia across cancer types" @default.
• W3154268917 doi "https://doi.org/10.1158/1557-3265.radsci21-ia-018" @default.
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