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    MnSOD upregulation sustains the Warburg effect via mitochondrial ROS and AMPK-dependent signalling in cancer.

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    Date
    2015-02-05
    Author
    Hart, P.C.
    Mao, M.
    de Abreu, A.L.
    Ansenberger-Fricano, Kristine
    Ekoue, D.N.
    Ganini, D.
    Kajdacsy-Balla, K.
    Diamond, A.M.
    Minshall, R.D.
    Consolaro, M.E.
    Santos, J.H.
    Bonini, M.G.
    Publisher
    Nature Publishing Group
    Metadata
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    Abstract
    Manganese superoxide dismutase (MnSOD/SOD2) is a mitochondria-resident enzyme that governs the types of reactive oxygen species egressing from the organelle to affect cellular signalling. Here we demonstrate that MnSOD upregulation in cancer cells establishes a steady flow of H2O2 originating from mitochondria that sustains AMP-activated kinase (AMPK) activation and the metabolic shift to glycolysis. Restricting MnSOD expression or inhibiting AMPK suppresses the metabolic switch and dampens the viability of transformed cells indicating that the MnSOD/AMPK axis is critical to support cancer cell bioenergetics. Recapitulating in vitro findings, clinical and epidemiologic analyses of MnSOD expression and AMPK activation indicated that the MnSOD/AMPK pathway is most active in advanced stage and aggressive breast cancer subtypes. Taken together, our results indicate that MnSOD serves as a biomarker of cancer progression and acts as critical regulator of tumour cell.
    Type
    Article
    Date available in INDIGO
    2016-05-02T16:23:49Z
    URI
    http://hdl.handle.net/10027/20487
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    • Publications - Medicine

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