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Kim, Hyung-Jin; Pandit, Arpana; Oh, Gi-Su; Shen, AiHua; Lee, Su-Bin; Khadka, Dipendra; Lee, SeungHoon; Shim, Hyeok; Yang, Sei-Hoon; Cho, Eun-Young; Kwak, Tae Hwan; Choe, Seong-Kyu; Park, Raekil; So, Hong-Seob
Hearing research, March 2016, 2016-Mar, 2016-03-00, 20160301, Letnik: 333Journal Article
Ototoxicity is an important issue in patients receiving cisplatin chemotherapy. Numerous studies have demonstrated that cisplatin-induced ototoxicity is related to oxidative stress and DNA damage. However, the precise mechanism underlying cisplatin-associated ototoxicity is still unclear. The cofactor nicotinamide adenine dinucleotide (NAD+) has emerged as an important regulator of energy metabolism and cellular homeostasis. Here, we demonstrate that the levels and activities of sirtuin-1 (SIRT1) are suppressed by the reduction of intracellular NAD+ levels in cisplatin-mediated ototoxicity. We provide evidence that the decreases in SIRT1 activity and expression facilitated by increasing poly(ADP-ribose) polymerase-1 (PARP-1) activation and microRNA-34a levels through cisplatin-mediated p53 activation aggravate the associated ototoxicity. Furthermore, we show that the induction of cellular NAD+ levels using dunnione, which targets intracellular NQO1, prevents the toxic effects of cisplatin through the regulation of PARP-1 and SIRT1 activity. These results suggest that direct modulation of cellular NAD+ levels by pharmacological agents could be a promising therapeutic approach for protection from cisplatin-induced ototoxicity. •SIRT1 activity is suppressed by the reduction of cellular NAD+ levels.•Decreases in SIRT1 expression facilitated by p53-microRNA34a pathway.•Induction of cellular NAD+ levels using dunnione prevents the cisplatin ototoxicity.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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