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- W2889726478 abstract "Serine/threonine kinase 33 (STK33), a member of the calcium/calmodulin-dependent kinase (CAMK), plays vital roles in a wide spectrum of cell processes. The present study was designed to investigate whether STK33 expressed in the mammalian cochlea and, if so, what effect STK33 exerted on aminoglycoside-induced ototoxicity in House Ear Institute-Organ of Corti 1 (HEI-OC1) cells. Immunofluorescence staining and western blotting were performed to investigate STK33 expression in cochlear hair cells (HCs) and HEI-OC1 cells with or without gentamicin treatment. CCK8, flow cytometry, immunofluorescence staining and western blotting were employed to detect the effects of STK33 knockdown, and/or U0126, and/or N-acetyl-L-cysteine (NAC) on the sensitivity to gentamicin-induced ototoxicity in HEI-OC1 cells. We found that STK33 was expressed in both mice cochlear HCs and HEI-OC1 cells, and the expression of STK33 was significantly decreased in cochlear HCs and HEI-OC1 cells after gentamicin exposure. STK33 knockdown resulted in an increase in the cleaved caspase-3 and Bax expressions as well as cell apoptosis after gentamicin damage in HEI-OC1 cells. Mechanistic studies revealed that knockdown of STK33 led to activated mitochondrial apoptosis pathway as well as augmented reactive oxygen species (ROS) accumulation after gentamicin damage. Moreover, STK33 was involved in extracellular signal-regulated kinase 1/2 pathway in primary culture of HCs and HEI-OC1 cells in response to gentamicin insult. The findings from this work indicate that STK33 decreases the sensitivity to the apoptosis dependent on mitochondrial apoptotic pathway by regulating ROS generation after gentamicin treatment, which provides a new potential target for protection from the aminoglycoside-induced ototoxicity." @default.
- W2889726478 created "2018-09-27" @default.
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- W2889726478 date "2018-09-06" @default.
- W2889726478 modified "2023-10-18" @default.
- W2889726478 title "STK33 alleviates gentamicin-induced ototoxicity in cochlear hair cells and House Ear Institute-Organ of Corti 1 cells" @default.
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- W2889726478 doi "https://doi.org/10.1111/jcmm.13792" @default.
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