Fig. 11. The graph show the relative mRNA expression levels of c-kit (red line), STRA8 and PCNA between different groups in the testis tissue; the relative mRNA expression was tested at 8 weeks after the last injection, as shown in graph, the relative mRNA expression of c-kit and STRA8 in testis tissue were decreased significantly after busulfan and busulfan/CM Injection compared to control and DMSO groups (p<0.000***), this decrease was more dominant in the busulfan groups than busulfan/CM groups, and also, the alterations of relative expression for PCNA wasn't significant between experimental groups in compared to DMSO and control roups (***p<0.001).