Metformin inhibits mitochondrial complex I of cancer cells to reduce tumorigenesis.

Abstract:

:Recent epidemiological and laboratory-based studies suggest that the anti-diabetic drug metformin prevents cancer progression. How metformin diminishes tumor growth is not fully understood. In this study, we report that in human cancer cells, metformin inhibits mitochondrial complex I (NADH dehydrogenase) activity and cellular respiration. Metformin inhibited cellular proliferation in the presence of glucose, but induced cell death upon glucose deprivation, indicating that cancer cells rely exclusively on glycolysis for survival in the presence of metformin. Metformin also reduced hypoxic activation of hypoxia-inducible factor 1 (HIF-1). All of these effects of metformin were reversed when the metformin-resistant Saccharomyces cerevisiae NADH dehydrogenase NDI1 was overexpressed. In vivo, the administration of metformin to mice inhibited the growth of control human cancer cells but not those expressing NDI1. Thus, we have demonstrated that metformin's inhibitory effects on cancer progression are cancer cell autonomous and depend on its ability to inhibit mitochondrial complex I.DOI: http://dx.doi.org/10.7554/eLife.02242.001.

journal_name

Elife

journal_title

eLife

authors

Wheaton WW,Weinberg SE,Hamanaka RB,Soberanes S,Sullivan LB,Anso E,Glasauer A,Dufour E,Mutlu GM,Budigner GS,Chandel NS

doi

10.7554/eLife.02242

subject

Has Abstract

pub_date

2014-05-13 00:00:00

pages

e02242

issn

2050-084X

journal_volume

3

pub_type

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