Lycopene inhibits apoptosis of mouse spermatocytes in varicocele via miR-23a/b-induced downregulation of PROK2

Abstract

Context The varicocele is the leading cause of male infertility and can impair sperm quality and testicular function through various mechanisms. In our previous study, we found that lycopene could attenuate hypoxia-induced testicular injury. Aims To illustrate the detailed mechanism of lycopene on spermatocytes. Methods The effect of lycopene on GC-2 cells under hypoxia were detected by flow cytometry and western blot assay. miR-seq was used to determine miRNA expression in varicocele rat model testes. The function of miR-23a/b were determined by flow cytometry and western blot assay. Key results We demonstrate that lycopene could alleviate hypoxia-induced GC-2 cell apoptosis and could elevate miR-23a/b expression of the hypoxia model in vivo and in vitro. The miR-23a and -23b mimics could reduce the hypoxia-induced GC-2 cell apoptosis. Both miR-23a and -23b could directly bind with prokineticin 2 (PROK2) mRNA and downregulate its expression. Conclusions Lycopene could attenuate hypoxia-induced spermatocyte injury through the miR-23a/b–PROK2 pathway. Implications Lycopene may be an effective treatment for varicocele to improve testicular impairment.