The influence of different doses of SIF on testosterone levels and the expression of proteins and genes related to testosterone synthesis in DIO male rats. A. Integrated optical densities (IODs) of StAR, CYP11A1, CYP17, HSD3β and HSD17β protein expression in the testis. B. StAR, CYP11A1, CYP17, HSD3β and HSD17β mRNA expression levels in the testis. C. The levels of testosterone in the testis. The values are presented as means ± standard deviation. *P<0.05, **P<0.01 vs. Control group; #P<0.05, P<0.01 vs. Obesity group.