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Chronic stress impairs male spermatogenesis function and Nectin-3 protein expression in the testis

T. Li, J. Yao, Q. Zhang, Q. Li, J. Li, X. Wang, W. Li, A. Chen, J. Yan

. 2020 ; 69 (2) : 297-306. [pub] 20200323

Language English Country Czech Republic

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc21011349

Chronic stress is a crucial public issue that occurs when a person is repetitively stimulated by various stressors. Previous researches have reported that chronic stress induces spermatogenesis dysfunction in the reproductive system, but its molecular mechanisms remain unclear. The nectin protein family, including nectin-1 to nectin-4, is Ca(2+)-independent immunoglobulin-like cell adhesion molecules, that are widely expressed in the hippocampus, testicular tissue, epithelial cells and other sites. Nectin-3 contributes to the sperm development at the late stage, and the abnormal expression of nectin-3 impairs spermatogenesis. Some recent studies have demonstrated that stress induces a decrease in nectin-3 expression in the hippocampus via corticotropin-releasing hormone (CRH) to corticotropin-releasing hormone receptor 1 (CRHR1) pathway. Here, we tested whether chronic stress also caused a reduction in nectin-3 expression in the testis. We established a chronic social defeat stress paradigm, which provides naturalistic and complex chronic stress inmale C57BL/6 mice. After 25 days of chronic social defeat stress, the mice showed weight loss, thymic atrophy and some other typical symptoms of chronic stress (e.g.anxiety-like behavior and social avoidance behavior). We found gonad atrophy, testicular histological structure changes and semen quality reductions in the stressed mice. The stressed male mice significantly spent more time to impregnate the female mice than the control male mice. Moreover, nectin-3 protein levels in stressed mice were significantly decreased in the testes compared with those in control mice. In addition, we found that the CRHR1 expression level was increased in the testes of stressed mice. Therefore, we demonstrated a decreased level of nectin-3 expression and an increase in CRHR1 expression in the testis after exposure to chronic stress, which may provide a potential therapeutic target for the spermatogenesis dysfunction induced by chronic stress.

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$a Chronic stress is a crucial public issue that occurs when a person is repetitively stimulated by various stressors. Previous researches have reported that chronic stress induces spermatogenesis dysfunction in the reproductive system, but its molecular mechanisms remain unclear. The nectin protein family, including nectin-1 to nectin-4, is Ca(2+)-independent immunoglobulin-like cell adhesion molecules, that are widely expressed in the hippocampus, testicular tissue, epithelial cells and other sites. Nectin-3 contributes to the sperm development at the late stage, and the abnormal expression of nectin-3 impairs spermatogenesis. Some recent studies have demonstrated that stress induces a decrease in nectin-3 expression in the hippocampus via corticotropin-releasing hormone (CRH) to corticotropin-releasing hormone receptor 1 (CRHR1) pathway. Here, we tested whether chronic stress also caused a reduction in nectin-3 expression in the testis. We established a chronic social defeat stress paradigm, which provides naturalistic and complex chronic stress inmale C57BL/6 mice. After 25 days of chronic social defeat stress, the mice showed weight loss, thymic atrophy and some other typical symptoms of chronic stress (e.g.anxiety-like behavior and social avoidance behavior). We found gonad atrophy, testicular histological structure changes and semen quality reductions in the stressed mice. The stressed male mice significantly spent more time to impregnate the female mice than the control male mice. Moreover, nectin-3 protein levels in stressed mice were significantly decreased in the testes compared with those in control mice. In addition, we found that the CRHR1 expression level was increased in the testes of stressed mice. Therefore, we demonstrated a decreased level of nectin-3 expression and an increase in CRHR1 expression in the testis after exposure to chronic stress, which may provide a potential therapeutic target for the spermatogenesis dysfunction induced by chronic stress.
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$a Zhang, Q. $u Shigatse Branch, Xinqiao Hospital, Third Military Medical University, Shigatse, China
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