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- Title
Oleanolic acid rejuvenates testicular function through attenuating germ cell DNA damage and apoptosis via deactivation of NF-κB, p53 and p38 signalling pathways.
- Authors
Zhao, Haixia; Liu, Jing; Song, Laixin; Liu, Zhencai; Han, Guifang; Yuan, Ding; Wang, Ting; Dun, Yaoyan; Zhou, Zhiyong; Liu, Zhaoqi; Wang, Yongjun; Zhang, Changcheng
- Abstract
Objectives Inflammation can cause degenerative changes of reproductive function. Oleanolic acid ( OA), the effective component from Ligustrum lucidum Ait., exhibits significantly anti-inflammation and antiageing activity. However, whether OA restores testicular dysfunction via inhibition of inflammation with ageing is unclear. Here, in a natural ageing rat model, we investigated the protection effects of OA and its mechanism of action. Methods Eighteen-month-old Sprague Dawley ( SD) rats were randomly divided into ageing control group and two OA-treated groups (5 and 25 mg/kg). Nine-month-old SD rats were used as adult controls. All rats were received either vehicle or OA for 6 months. Then, histomorphology, weight and index of testis, protein expression and immunohistochemistry were examined. Key findings Oleanolic acid significantly restored testicular morphology and improved testicular weight and index. Moreover, OA significantly inhibited phospho- NF-κB p65 and its downstream proinflammatory cytokines' expressions, including IL-1β, COX-2 and TNF-α in testis tissues. Similarly, OA remarkably inhibited IL-1β and TNF-α production. OA significantly attenuated germ cells' DNA damage and apoptosis. Such changes were accompanied by downregulation of γH2 AX, p-P53 and Bax expressions, and upregulation of Bcl-2 and Bcl-2/Bax ratio. In addition, OA remarkably inhibited p38 signalling. Conclusions Oleanolic acid effectively rejuvenates testicular function via attenuating germ cell DNA damage and apoptosis through deactivation of NF-κB, p53 and p38 signalling pathways.
- Subjects
GERM cells; DNA damage; APOPTOSIS; ANTI-inflammatory agents; LABORATORY rats
- Publication
Journal of Pharmacy & Pharmacology, 2017, Vol 69, Issue 3, p295
- ISSN
0022-3573
- Publication type
Article
- DOI
10.1111/jphp.12668