alexa Mitochondrial division inhibitor 1 (mdivi-1) enhances death receptor-mediated apoptosis in human ovarian cancer cells.
Genetics

Genetics

Single Cell Biology

Author(s): Wang J, Hansen K, Edwards R, Van Houten B, Qian W, Wang J, Hansen K, Edwards R, Van Houten B, Qian W

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Abstract Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) based strategy is a promising targeted therapeutic approach for the treatment of a variety of cancers including ovarian cancer. However, the inherent or acquired resistance of tumor cells to TRAIL limits the potential application of TRAIL-mediated therapy. In this study, we identified that mitochondrial division inhibitor-1 (mdivi-1) is able to enhance the sensitivity of human ovarian cancer cells to death receptor ligands including TRAIL, FAS ligands, and TNF-α. Importantly, the combination of TRAIL and mdivi-1 has no apparent cytotoxic effect on non-transformed human cells, indicating a significant therapeutic window. We identified that caspase-8 and not the modulation of TRAIL receptors is required for the combination effect of TRAIL and mdivi-1. We further demonstrated that the enhanced efficacy of combination of mdivi-1 and death ligands is not dependent on the originally reported target of mdivi-1, Drp1, and is also not dependent on the two important pro-apoptotic Bcl-2 family proteins Bax and Bak. Thus, our study presents a novel strategy in enhancing the apoptotic effect of death receptor ligands and provides a new effective TRAIL-based combination approach for treating human ovarian cancer. Copyright © 2014 Elsevier Inc. All rights reserved.
This article was published in Biochem Biophys Res Commun and referenced in Single Cell Biology

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