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Oncotarget. 2016 May 24;7(21):30748-59. doi: 10.18632/oncotarget.8752.

Altered oncomodules underlie chromatin regulatory factors driver mutations.

Author information

1
Research Program on Biomedical Informatics, IMIM Hospital del Mar Medical Research Institute and Universitat Pompeu Fabra, 08003 Barcelona, Catalonia, Spain.
2
Programa de Recerca en Càncer, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), 08003 Barcelona, Spain.
3
Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain.

Abstract

Chromatin regulatory factors (CRFs), are known to be involved in tumorigenesis in several cancer types. Nevertheless, the molecular mechanisms through which driver alterations of CRFs cause tumorigenesis remain unknown. Here, we developed a CRFs Oncomodules Discovery approach, which mines several sources of cancer genomics and perturbaomics data. The approach prioritizes sets of genes significantly miss-regulated in primary tumors (oncomodules) bearing mutations of driver CRFs. We applied the approach to eleven TCGA tumor cohorts and uncovered oncomodules potentially associated to mutations of five driver CRFs in three cancer types. Our results revealed, for example, the potential involvement of the mTOR pathway in the development of tumors with loss-of-function mutations of MLL2 in head and neck squamous cell carcinomas. The experimental validation that MLL2 loss-of-function increases the sensitivity of cancer cell lines to mTOR inhibition lends further support to the validity of our approach. The potential oncogenic modules detected by our approach may guide experiments proposing ways to indirectly target driver mutations of CRFs.

KEYWORDS:

CRFs Oncomodules Discovery; CRFs oncogenic modules; chromatin regulatory factors; indirect targeted therapeutic strategies; oncogenic modules scoring system

PMID:
27095575
PMCID:
PMC5058714
DOI:
10.18632/oncotarget.8752
[Indexed for MEDLINE]
Free PMC Article

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