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Transformation of human mesenchymal stem cells increases their dependency on oxidative phosphorylation for energy production

Funes, Juan M. and Quintero, Marisol and Henderson, Stephen R. and Martinez, Dolores and Qureshi, Uzma and Westwood, Claire and Clements, Mark O. and Bourboulia, Dimitra and Pedley, R. Barbara and Moncada, Salvador and Boshoff, Chris (2007) Transformation of human mesenchymal stem cells increases their dependency on oxidative phosphorylation for energy production. Proceedings of the National Academy of Sciences, 104 (15). pp. 6223-6228. ISSN 0027-8424

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Official URL: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC185108...

Abstract

An increased dependency on glycolysis for ATP production is considered to be a hallmark of tumor cells. Whether this increase in glycolytic activity is due mainly to inherent metabolic alterations or to the hypoxic microenvironment remains controversial. Here we have transformed human adult mesenchymal stem cells (MSC) using genetic alterations as described for differentiated cells. Our data suggest that MSC require disruption of the same pathways as have been shown for differentiated cells to confer a fully transformed phenotype. Furthermore, we found that MSC are more glycolytic than primary human fibroblasts and, in contrast to differentiated cells, do not depend on increased aerobic glycolysis for ATP production during transformation. These data indicate that aerobic glycolysis (the Warburg effect) is not an intrinsic component of the transformation of adult stem cells, and that oncogenic adaptation to bioenergetic requirements, in some circumstances, may also rely on increases in oxidative phosphorylation. We did find, however, a reversible increase in the transcription of glycolytic enzymes in tumors generated by transformed MSC, indicating this is a secondary phenomenon resulting from adaptation of the tumor to its microenvironment. Copyright (2007), National Academy of Sciences, U.S.A.

Item Type:Article
Additional Information:Online ISSN 1091-6490
Research Community:University of Westminster > Life Sciences, School of
ID Code:4409
Deposited On:17 Jul 2007
Last Modified:02 Feb 2010 09:17

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