alexa Hypoxia and serum deprivation-induced apoptosis in mesenchymal stem cells.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Zhu W

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In recent years, the understanding that regeneration progresses at the level of the myocardium has placed stem cell research at the center stage in cardiology. Despite an increasing interest in cell transplant research, relatively little is known about the biochemical regulation of the stem cell itself after transplantation into an ischemic heart. We demonstrated here, using rat mesenchymal stem cells (MSCs), that cells undergo caspase-dependent apoptosis in response to hypoxia and serum deprivation (SD), which are both components of ischemia in vivo. In particular, the treated cells exhibited mitochondrial dysfunction, including cytochrome C release, loss in DeltaPsim, and Bax accumulation, but in a p53-independent manner. Although the cells treated by hypoxia/SD possess the activity of caspase-8, zIEDT-fmk, a specific caspase-8 inhibitor, failed to inhibit cell apoptosis induced in our system. Taken together, our findings indicate that MSCs are sensitive to hypoxia/SD stimuli that involve changes in mitochondrial integrity and function but are potentially independent of caspase-8.

This article was published in Stem Cells and referenced in Journal of Stem Cell Research & Therapy

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