Open Accessc‐MYB‐ and PGC1a‐dependent metabolic switch induced by MYBBP1A loss in renal cancer
Author(s) -
FelipeAbrio Blanca,
VerdugoSivianes Eva M.,
Carnero Amancio
Publication year - 2019
Publication title -
molecular oncology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.332
H-Index - 88
eISSN - 1878-0261
pISSN - 1574-7891
DOI - 10.1002/1878-0261.12499
Subject(s) - downregulation and upregulation , carcinogenesis , biology , cancer research , myb , psychological repression , microbiology and biotechnology , glycolysis , tumor microenvironment , suppressor , oxidative phosphorylation , cell growth , cancer , gene expression , gene , genetics , tumor cells , metabolism , endocrinology , biochemistry
The tumor microenvironment may alter the original tumorigenic potential of tumor cells. Under harsh environmental conditions, genetic alterations conferring selective advantages may initiate the growth of tumor subclones, providing new opportunities for these tumors to grow. We performed a genetic loss‐of‐function screen to identify genetic alterations able to promote tumor cell growth in the absence of glucose. We identified that downregulation of MYBBP1A increases tumorigenic properties under nonpermissive conditions. MYBBP1A downregulation simultaneously activates PGC1α, directly by alleviating direct repression and indirectly by increasing PGC1α mRNA levels through c‐MYB, leading to a metabolic switch from glycolysis to OXPHOS and increased tumorigenesis in low‐glucose microenvironments. We have also identified reduced MYBBP1A expression in human renal tumor samples, which show high expression levels of genes involved in oxidative metabolism. In summary, our data support the role of MYBBP1A as a tumor suppressor by regulating c‐MYB and PGC1α. Therefore, loss of MYBBP1A increases adaptability spanning of tumors through metabolic switch.