期刊
ENVIRONMENT INTERNATIONAL
卷 159, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.envint.2021.107038
关键词
Glyphosate; Blood-testis barrier; Oxidative stress; NOX1; Estrogen receptor
资金
- National Natural Science Foundation of China [31873030]
- Youth Innovation and Technology Program in Colleges and Universities of Shandong Province [2020KJF009]
- project of Shandong province higher educationalscience and technology program [J18KA119]
Long-term exposure to GLY adversely affects BTB integrity and disrupts spermatogenesis.
Blood-testis barrier (BTB) creates a privileged niche indispensable for spermatogenesis. Glyphosate (GLY), the most commonly used herbicide worldwide, has been reported to decrease sperm quality. However, whether and how GLY destroys the BTB to affect sperm quality remains to be elucidated. Herein, this study was designed to investigate the influence of GLY on the BTB in vivo and in vitro experiments. The results showed that male rats exposed to GLY for 4 months exhibited a decrease in sperm quality and quantity, accompanied by BTB integrity disruption and testicular oxidative stress. Additionally, GLY-induced reactive oxygen species (ROS) contributed to the downregulation of BTB-related proteins in primary Sertoli cells (SCs). Intriguingly, we identified a marked upregulation of oxidative stress-related gene NOX1 in GLY-exposed testis based on transcriptome analysis. NOX1 knockdown blocked the GLY-induced oxidative stress, as well as prevented BTB-related protein decrease in SCs. Furthermore, the estrogen receptor (ER)-alpha was significantly upregulated in vivo and in vitro models. An ER-alpha inhibitor decreased the expression levels of both ER-alpha and NOX1. Mechanistically, GLY directly interacted with ER-alpha at the site of Pro39 and Lys401 to promote ER-alpha activation, which boosted NOX1 expression to trigger ROS accumulation. Collectively, these results demonstrate that long-term GLY exposure adversely affects BTB integrity, which disrupts spermatogenesis via activation of ER-alpha/NOX1 axis. This study presents a better understanding of the risk of long-term GLY exposure to male fertility.
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