[Effect of testosterone on the expression of CMTM family of the male spermatogenesis suppression rats].

This study is to investigate the influence and the expression of CMTM family of testosterone on spermatogenesis suppression in the male rats treated by gossypol and cyclophosphamide. Gossypol (50 mg kg(-1)) and cyclophosphamide (20 mg kg(-1)) were administered to male rats to induce spermatogenesis suppression. Testosterone propionate was administrated at the dose of 5 mg kg(-1) every other day for 6 times. Sperm was collected from the left caudal epididymis, the count and motility of sperm were analyzed by CASA. Morphological change of testis tissue was observed with HE staining. The expression of CMTM family was examined by Western blotting assay. Gossypol (50 mg kg(-1)) and cyclophosphamide (20 mg kg(-1)) decreased the count and motility of sperm, and the pathological change of testis tissue was also observed. But, testosterone (5 mg kg(-1)) had positive effect. Furthermore, CMTM4 down-expressed remarkably in the gossypol and cyclophosphamide treated rats, the expression of the CMTM4 was up-expressed after testosterone administration. On the contrary, the expression of CMTM2 increased significantly only in gossypol treated male rats, but not in cyclophosphamide treated male rats. The expression of CMTM2 was down-expressed after testosterone administration. However, no obvious change of CMTM2 was observed in cyclophosphamide treated rats. Testosterone did not influence the expression of CKLF1, CMTM3 and CMTM5, the CMTM6, CMTM7 and CMTM8 of CMTM family were not detected in testis tissue. These demonstrated that the spermatogenesis effect of testosterone (5 mg kg(-1)) was associated with the expression of CMTM family, and CMTM2 and CMTM4 may take part in the spermatogenesis process.