Abstract:
:Many primary-tumor subregions 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 microRNAs (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.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Bhandari V,Hoey C,Liu LY,Lalonde E,Ray J,Livingstone J,Lesurf R,Shiah YJ,Vujcic T,Huang X,Espiritu SMG,Heisler LE,Yousif F,Huang V,Yamaguchi TN,Yao CQ,Sabelnykova VY,Fraser M,Chua MLK,van der Kwast T,Liu SK,Boutdoi
10.1038/s41588-018-0318-2subject
Has Abstractpub_date
2019-02-01 00:00:00pages
308-318issue
2eissn
1061-4036issn
1546-1718pii
10.1038/s41588-018-0318-2journal_volume
51pub_type
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