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Abstract Title:

Pomegranate peel extract attenuates D-galactose-induced oxidative stress and hearing loss by regulating PNUTS/PP1 activity in the mouse cochlea.

Abstract Source:

Neurobiol Aging. 2017 Jul 25 ;59:30-40. Epub 2017 Jul 25. PMID: 28837860

Abstract Author(s):

Shuangyue Liu, Tao Xu, Xidi Wu, Yuhan Lin, Dongyan Bao, Yang Di, Tingting Ma, Yan Dang, Peili Jia, Jianqiao Xian, Aimei Wang, Yongxin Liu

Article Affiliation:

Shuangyue Liu

Abstract:

Oxidative stress is considered to be a major contributor to age-related hearing loss (ARHL). Here, we investigated whether pomegranate peel extract (PPE) protected against hearing loss by decreased oxidative stress in the cochlea of D-galactose-induced accelerated aging mice. The aging mice exhibited an increase in hearing threshold shifts and hair cells loss, which were improved in the PPE-treated aging mice. The aging mice also exhibited an increase in 4-hydroxynonenal, the expression of protein phosphatase 1 nuclear targeting subunit (PNUTS), p53 and caspase-3, and a decrease in protein phosphatase 1 (PP1) and MDM2 in the cochlea. PPE treatment reversed the changes in aforementioned molecules. Our results suggested that PPE can protect against ARHL, the underlying mechanisms may involve in the inhibition of oxidative damage of cochlea, possibly by regulating PNUTS/PP1 pathway. The results from the present study provide a new therapeutic strategy to use PPE for prevention of ARHL.

Study Type : Animal Study

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