Mitochondrial Respiration - An Important Therapeutic Target in Melanoma

作者：de Moura Michelle Barbi^*; Vincent Garret; Fayewicz Shelley L; Bateman Nicholas W; Hood Brian L; Sun Mai; Suhan Joseph; Duensing Stefan; Yin Yan; Sander Cindy; Kirkwood John M; Becker Dorothea; Conrads Thomas P; Van Houten Bennett; Moschos Stergios J

来源：PLos One, 2012, 7(8): e40690.

DOI：10.1371/journal.pone.0040690

The importance of mitochondria as oxygen sensors as well as producers of ATP and reactive oxygen species (ROS) has recently become a focal point of cancer research. However, in the case of melanoma, little information is available to what extent cellular bioenergetics processes contribute to the progression of the disease and related to it, whether oxidative phosphorylation (OXPHOS) has a prominent role in advanced melanoma. In this study we demonstrate that compared to melanocytes, metastatic melanoma cells have elevated levels of OXPHOS. Furthermore, treating metastatic melanoma cells with the drug, Elesclomol, which induces cancer cell apoptosis through oxidative stress, we document by way of stable isotope labeling with amino acids in cell culture (SILAC) that proteins participating in OXPHOS are downregulated. We also provide evidence that melanoma cells with high levels of glycolysis are more resistant to Elesclomol. We further show that Elesclomol upregulates hypoxia inducible factor 1-alpha (HIF-1 alpha), and that prolonged exposure of melanoma cells to this drug leads to selection of melanoma cells with high levels of glycolysis. Taken together, our findings suggest that molecular targeting of OXPHOS may have efficacy for advanced melanoma.

• 出版日期2012-8-17