Exogenous oestradiol benzoate induces male mice azoospermia through modulation of oxidative stress and testicular metabolic cooperation

Le,Jianghua; Lei,Xiaocan; Ren,Yanping; Li,Zhipeng; Tu,Haoyan; Ding,Fangya; Yi,Xiaodong; Zhou,Yi; Liu,Qingyou; Zhang,Shun

doi:10.3892/mmr.2019.10169

Exogenous oestradiol benzoate induces male mice azoospermia through modulation of oxidative stress and testicular metabolic cooperation

Authors:
- Jianghua Le
- Xiaocan Lei
- Yanping Ren
- Zhipeng Li
- Haoyan Tu
- Fangya Ding
- Xiaodong Yi
- Yi Zhou
- Qingyou Liu
- Shun Zhang
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Affiliations: Department of Reproductive Medical Center, The Affiliated Hospital of Guilin Medical University, Guilin, Guangxi 541001, P.R. China, Department of Histology and Embryology, School of Basic Medical Sciences, Zunyi Medical University, Zunyi, Guizhou 563006, P.R. China, State Key Laboratory for Conversation and Utilization of Subtropical Agro‑Bioresources, Guangxi University, Nanning, Guangxi 530004, P.R. China
Published online on: April 16, 2019 https://doi.org/10.3892/mmr.2019.10169
Pages: 4955-4963

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Abstract

In most cases, exogenous oestradiol benzoate (EB) inhibits spermatogenesis, however, the mechanism underlying this process has not been fully elucidated. The present study investigated the effect of EB on redox equilibrium and glycometabolism in mouse testes. Male Kunming mice were divided into 3 groups and injected with 0, 5 and 10 mg/kg EB, respectively. Histological analysis revealed no sperm and far fewer spermatogenic cells in the testes of EB‑treated mice. Additionally, transmission electron microscopy revealed that mitochondria in Sertoli cells were transformed to vacuoles with irregular cristae in the EB‑treated group. EB also significantly decreased the activities and mRNA expression of catalase, superoxide dismutase, and glutathione peroxidase and increased the activity of nitric oxide synthase and nitric oxide concentration in the testes compared with the control. These results indicated that oxidative damage was caused by EB treatment. With regard to glycometabolism, ATP content and activities of hexokinase and pyruvate kinase were significantly reduced in the EB‑treated group. Although glucose and pyruvate concentrations were significantly increased by EB treatment, levels of lactate, the main energy source of spermatogenic cells, were unchanged. Monocarboxylate transporter 2 (MCT2) and MCT4, which are responsible for lactate transportation, were downregulated by EB. In conclusion, the results of the present study indicated that azoospermia induced by EB in male mice was associated with oxidative damage and the disorder of testicular metabolic cooperation.

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