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- W2951565157 abstract "Peroxisomes cooperate with mitochondria in the performance of cellular metabolic functions such as fatty acid oxidation and maintenance of redox homeostasis. Whether peroxisomes also regulate mitochondrial fission-fusion dynamics or mitochondrion-dependent apoptosis has remained unclear, however. We now show that genetic ablation of the peroxins Pex3 or Pex5, which are essential for peroxisome biogenesis, resulted in mitochondrial fragmentation in MEFs in a manner dependent on Drp1. Conversely, treatment with 4-PBA, a peroxisome proliferator, resulted in mitochondrial elongation in wild-type MEFs, but not in Pex3-deficient MEFs. We further found that peroxisome deficiency increased the levels of cytosolic cytochrome c and caspase activity under basal conditions without inducing apoptosis. It also greatly enhanced etoposide-induced caspase activation and apoptosis, indicative of an enhanced cellular sensitivity to death signals. Together, our data unveil a previously unrecognized role of peroxisomes in the regulation of mitochondrial dynamics and mitochondrion-dependent apoptosis. Effects of peroxin genes mutations on mitochondrion-dependent apoptosis may contribute to pathogenesis of peroxisome biogenesis disorders." @default.
- W2951565157 created "2019-06-27" @default.
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- W2951565157 date "2019-01-01" @default.
- W2951565157 modified "2023-10-16" @default.
- W2951565157 title "Peroxisomes control mitochondrial dynamics and the mitochondrion-dependent pathway of apoptosis" @default.
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- W2951565157 doi "https://doi.org/10.1242/jcs.224766" @default.
- W2951565157 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31076512" @default.
- W2951565157 hasPublicationYear "2019" @default.
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