Abstract
Malignant melanoma has shown increased incidence and high mortality rate in the last three decades. In this study, we investigated whether combination therapy with ch282-5 (a novel BH3 mimetic) and microwave hyperthermia could display synergistic antitumor effects against melanoma. Our results indicated that combination therapy reduced the viability and proliferation of melanoma cells. Through inhibiting the expression of anti-apoptotic proteins of Bcl-2 and IAP family and activating MAPK proteins, combined hyperthermia enhanced ch282-5-induced apoptosis. Combination therapy also synergistically disturbed the mTOR/p70S6k signaling pathway, which is important for cell survival and migration. Moreover, our results showed that combination therapy remarkably suppressed melanoma cell migration in vitro and significantly reduced experimental pulmonary metastasis in vivo. In conclusion, our results indicate that combination therapy with ch282-5 and hyperthermia has synergistic antitumor effects and provides a possible therapeutic strategy for advanced melanoma.
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