The exposure of Carbon disulfide (CS2) is associated with germ cell injury and male infertility in animals and humans. However, the molecular mechanism is currently unknown. This study show here that CS2-induced Sertoli cells injury via Endoplasmic reticulum (ER) apoptotic pathway. SD male rats were exposed to doses of CS2 (0, 50, 250, 1250mgm(-3)) for 4weeks. After treatment, loose structures of seminiferous tubules and disordered cell arrangements were observed by light microscopy. Ultrastructural lesions, deformed chromatins and vacuoles formed from swollen ER were observed by electron microscopy. After primary culture of Sertoli cells, a dose-dependent increased apoptosis were found. The increased activity of Caspase 3, accumulation of intracellular Ca(2+), up-regulation of mRNA and protein expressions of ER apoptotic relative molecules (Calpain 2, Cleaved-Caspase 12, GRP78 and CHOP) were also found in this study. Altogether, our findings indicated that ER apoptotic pathway played an important role in CS2-induced Sertoli cell impairment.
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