Add time:08/16/2019         Source:sciencedirect.com

di-Calciphor (cas 135608-06-9) is a synthetic derivative of prostaglandin B1 that protects against cerebral and cardiac ischemia apparently by preserving mitochondrial function. To determine whether di-Calciphor specifically protects against mitochondrial failure, we studied its effects on mitochondrial functions in hepatocytes treated with the specific mitochondrial poison, antimycin A. The results show that 1 μM di-Calciphor protects against cell death at concentrations of antimycin A that inhibited mitochondrial respiration and caused cellular ATP depletion. Di-Calciphor did not protect against loss of ATP but did protect against the loss of mitochondrial Δψ and ΔpH. In addition, di-Calciphor protected against antimycin A-induced loading of phosphate into mitochondria and an associated mitochondrial swelling. Thus, these results show that di-Calciphor protects against a specific mitochondrial poison and support the interpretation that di-Calciphor is a mitochondrial protective agent. In addition, the results suggest that the protection of the mitochondria involves preservation of mitochondrial ionic and osmotic stability and does not involve improved ATP supply.

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