Abstract
The mitochondrial permeability transition pore (mPTP) significantly impacts mitochondrial responses to cell death signals through its structural opening. Cyclophilin D (CypD) serves as a key regulator of the mPTP and plays a pivotal role in governing mitochondrial responses to cell death. In this study, we have demonstrated that Toxoplasma expresses a homolog of cyclophilin D, named TgCypD, which is localized in the mitochondria. Depletion of TgCypD resulted in a modest inhibition of tachyzoite invasion and proliferation, with no notable effect on mitochondrial morphology. However, TgCypD deficiency led to the inhibition of cytochrome c release from mitochondria into the cytosol, thereby imparting resistance to oxidative stress-induced cell death. Our findings suggest that T. gondii contains the mPTP component protein TgCypD, which is intricately involved in regulating mitochondrial responses to cell death.
Published Version
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