[Protective effect of oleanolic acid liposomes on cisplatin-induced oligoasthenospermia in mice]

To study the protective effect of oleanolic acid liposomes (OA-Lips) on cisplatin-induced oligoasthenospermia (COAS) in mice.

Sixty ICR mice were randomly divided into a normal control, a COAS model control, a positive control and a low-, a medium- and a high-dose OA-Lips group. The animals in the low-, medium- and high-dose OA-Lips and positive control groups were given intragastrically OA-Lips solution at 25, 50, and 100 mg/kg/d and vitamin E at 50 mg/kg/d, respectively. On the 28th day, the mice in the COAS model control, positive control and OA-Lips groups were injected intraperitoneally with cisplatin solution at 10 mg/kg, while those in the normal control group with the same dose of normal saline. Three days after administration, all the mice were sacrificed and their testis tissues collected for detection of the semen parameters and observation of the testicular morphology.

Both the percentage of motile sperm and sperm concentration were significantly increased in the high-dose OA-Lips group (P < 0.05). HE staining showed that OA-Lips remarkably improved the damaged testis tissue (P < 0.05) and protected the seminiferous tubules and interstitial cells. The percentage of progressively motile sperm (PMS) and the curvilinear velocity (VCL), straight line velocity (VSL), average path velocity (VAP), linearity (LIN), straightness (STR), wobble (WOB), amplitude of lateral head displacement (ALH) and beat-cross frequency (BCF) of sperm were gradually increased in a dose-dependent manner in the OA-Lips groups. The serum T level was significantly higher (P < 0.05) in the OA-Lips-treated mice than in the COAS model controls while the percentage of morphologically abnormal sperm (MAS) markedly lower in the high-dose OA-Lips group than in the model control, positive control and low-dose OA-Lips groups (P < 0.05).

OA-Lips can relieve oligoaspermia and improve the productive ability of mice.