1. l-Argine regulates the proliferation, apoptosis and endocrine activity by alleviating oxidative stress in sheep endometrial epithelial cells.
- Author
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Gao, Xiaoxiao, Li, Xiaodan, Wang, Zhibo, Li, Kang, Liang, Yaxu, Yao, Xiaolei, Zhang, Guomin, and Wang, Feng
- Subjects
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OXIDATIVE stress , *EPITHELIAL cells , *SHEEP , *OXIDANT status , *REACTIVE oxygen species - Abstract
l -arginine (L-Arg) is a semiessential amino acid that plays crucial roles in the reproductive performance of animals. This research aimed to investigate the effect of supplementing L-Arg on endometrial epithelial cells (EECs) of Hu sheep. In vivo , female Hu sheep were randomly divided into three groups: control group (n = 5), nutrient-restricted group (n = 5), and L-Arg supplemented nutrient-restricted group (n = 5). Then, the effect of L-Arg on ovine endometrial growth and antioxidant capacity was assessed. We found that L-Arg supplementation promoted the growth of endometrial ductal gland invaginations (DGI), and alleviated oxidative stress in nutrient-restricted sheep. In order to investigate its mechanism, a H 2 O 2 -induced EECs oxidative stress model was established, and roles of L-Arg in EECs oxidation resistance, proliferation, apoptosis and endocrine activity were studied in vitro. Our results showed that L-Arg markedly decreased the release of reactive oxygen species (ROS) and malonaldehyde (MDA), and enhanced the expression and activity of certain antioxidant enzymes in EECs challenged by the H 2 O 2 (p < 0.05). Supplementation of L-Arg significantly reduced the effect of 200 μM H 2 O 2 on the viability of EECs (p < 0.05). In addition, EECs treated with L-Arg significantly alleviated the G0/G1-phase cell cycle arrest, apoptosis, and the inhibition of endometrial growth factors expression caused by H 2 O 2 (p < 0.05). Overall, the results demonstrate that L-Arg performs crucial roles in maintaining the proliferation of ovine EECs, endocrine activity and inhibiting apoptosis through reducing oxidative stress. This study offers a theoretical basis for using L-Arg to improve sheep the uterine function. • L-Arg enhances the growth of endometrial DGI in nutrient-restricted Hu sheep. • L-Arg alleviates endometrial oxidative stress induced by nutrient-restriction. • L-Arg inhibits the apoptosis, enhances proliferation and endocrine activity of EECs. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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