Metformin Protects Auditory Hair Cells from Gentamicin-Induced Toxicity in vitro
Abstract
Metformin is a commonly used antidiabetic drug. It has been shown that this drug activates the AMP-activated protein kinase, which inhibits downstream the mammalian target of rapamycin. In addition, several studies indicate that metformin reduces intracellular reactive oxygen species. Our data, using an in vitro rat model, indicate that metformin is able to protect auditory hair cells (HCs) from gentamicin-induced apoptotic cell death. Moreover, metformin has no toxic effect on spiral ganglion neuronal survival or outgrowth in vitro. These results suggest a protective effect of metformin on auditory HC survival in gentamicin-induced HC loss in vitro.
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