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

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.

journal_name

Neurobiol Aging

journal_title

Neurobiology of aging

authors

Liu S,Xu T,Wu X,Lin Y,Bao D,Di Y,Ma T,Dang Y,Jia P,Xian J,Wang A,Liu Y

doi

10.1016/j.neurobiolaging.2017.07.007

subject

Has Abstract

pub_date

2017-11-01 00:00:00

pages

30-40

eissn

0197-4580

issn

1558-1497

pii

S0197-4580(17)30240-3

journal_volume

59

pub_type

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