Reproduction, Fertility and Development Reproduction, Fertility and Development Society
Vertebrate reproductive science and technology
RESEARCH ARTICLE

Protective effects of polydatin on experimental testicular torsion and detorsion injury in rats

Huilian Qiao A * , He Ma A * , Wanjun Cao A , Hao Chen B , Jinhua Wei A and Zhen Li A C
+ Author Affiliations
- Author Affiliations

A Department of Histology and Embryology, The Fourth Military Medical University, Xi’an, Shaan Xi Province, 710032, PR China.

B Department of Cardiovascular Center, The 309th Hospital of Chinese PLA, Beijing, 100193, PR China.

C Corresponding author. Email: lizhenhe@fmmu.edu.cn

Reproduction, Fertility and Development - https://doi.org/10.1071/RD17046
Submitted: 7 February 2017  Accepted: 20 March 2017   Published online: 26 April 2017

Abstract

Oxidative stress plays a critical role in the process of testicular torsion and detorsion (T/D). The purpose of the present study was to investigate the protective effect of polydatin (PD) on testicular T/D injury. Rats were randomly divided into three groups, a sham group, a group subjected to 2 h torsion followed by 24 h detorsion and a group subjected to T/D and injected i.p. with 20 mg kg-1 PD 30 min before detorsion. Unilateral orchiectomy was performed after 24 h of reperfusion. Half the testes were prepared for histological examination by haematoxylin–eosin staining and the terminal deoxyribonucleotidyl transferase-mediated dUTP–digoxigenin nick end-labelling (TUNEL) technique. In the remaining tissues, levels of malondialdehyde (MDA), catalase (CAT), glutathione peroxidase (GPx) and superoxide dismutase (SOD) were determined, as was the expression of several apoptosis-related proteins. Compared with the T/D group, PD pretreatment significantly ameliorated the morphological damage, lowered the Cosentino histological score and increased the mean number of germ cell layers and Johnsen’s testicular biopsy score. In addition, PD treatment markedly decreased MDA levels and upregulated CAT, GPx and SOD activity. Furthermore, PD decreased T/D-induced germ cell-specific apoptosis, attenuated the activation of caspase-3, caspase-8, caspase-9 and poly(ADP-ribose) polymerase and increased the Bcl-2/Bax ratio. The findings indicate that PD has a protective effect against testicular T/D injuries, especially at the histological, antioxidative stress and antiapoptotic levels.

Additional keywords: ischaemia–reperfusion, oxidative stress, apoptosis.


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