[Effect of vasostomy on expression of Bcl-2 and Bax gene in rat spermatogenic cells]

The objective of this study was to explore the change of Bcl-2 and Bax gene expression in rat spermatogneic cells after vasostomy. A rat model with vasoligation and vasostomy was set up and then used for detecting the protein expression of Bcl-2 and Bax gene at 4, 8, 12, 16 weeks after vasostomy by means of immunohistochemistry. Sixty rats were randomly distributed into three groups named vasoligation group (VG), vasostomy group(VOG) and sham-operation group(SOG) respectively. The results showed that the Bcl-2 protein expression in VOG group increased gradually and came to be significantly higher than that in VG group 8 weeks after vasostomy, and it's level was the same as that in SOG group at the 12th week. The bax protein expressions in VG and VOG groups were significantly higher than that in SOG group, but there was no difference between VOG and VG groups. In conclusion, the change of Bcl-2 protein expression observed in this study is indicative of the anti-apoptosis function of Bcl-2 gene in both the status of being vasoligated and vasostomized, whereas the consistent Bax protein expression before and often the repatency of the vas suggests further researches into its effect on apoptosis of spermatogenic cells.