Acta Pharmaceutica Sinica B (Feb 2022)

Anti-aging effects of chlorpropamide depend on mitochondrial complex-II and the production of mitochondrial reactive oxygen species

  • Zhifan Mao,
  • Wenwen Liu,
  • Yunyuan Huang,
  • Tianyue Sun,
  • Keting Bao,
  • Jiali Feng,
  • Alexey Moskalev,
  • Zelan Hu,
  • Jian Li

Journal volume & issue
Vol. 12, no. 2
pp. 665 – 677

Abstract

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Sulfonylureas are widely used oral anti-diabetic drugs. However, its long-term usage effects on patients’ lifespan remain controversial, with no reports of influence on animal longevity. Hence, the anti-aging effects of chlorpropamide along with glimepiride, glibenclamide, and tolbutamide were studied with special emphasis on the interaction of chlorpropamide with mitochondrial ATP-sensitive K+ (mitoK-ATP) channels and mitochondrial complex II. Chlorpropamide delayed aging in Caenorhabditis elegans, human lung fibroblast MRC-5 cells and reduced doxorubicin-induced senescence in both MRC-5 cells and mice. In addition, the mitochondrial membrane potential and ATP levels were significantly increased in chlorpropamide-treated worms, which is consistent with the function of its reported targets, mitoK-ATP channels. Increased levels of mitochondrial reactive oxygen species (mtROS) were observed in chlorpropamide-treated worms. Moreover, the lifespan extension by chlorpropamide required complex II and increased mtROS levels, indicating that chlorpropamide acts on complex II directly or indirectly via mitoK-ATP to increase the production of mtROS as a pro-longevity signal. This study provides mechanistic insight into the anti-aging effects of sulfonylureas in C. elegans.

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