Background: Male infertility is mostly due to low sperm quality, which accounts for about 50% of the causes of infertility. The reasons for low sperm quality are still unclear. Nowadays, many drinks contain high levels of fat, and its effect on fertility is not yet known.
Objectives: To investigate the effect of cholesterol-containing water on male fertility.
Material And Methods: Forty BALB/c male mice were divided into 2 groups: the control group and the water-induced obesity (WIO) group. Body and testicular weights were recorded and analyzed statistically. Testicular tissues were examined. Serum contents of total cholesterol (TC), triglycerides (TG), low-density lipoprotein (LDL), free testosterone (FT), luteinizing hormone (LH), and follicle-stimulating hormone (FSH) were determined. Motility count and morphology of sperm were analyzed. Real-time polymerase chain reaction (RT-PCR) was performed for SYCP3, VEGFA and WT1 genes.
Results: The results showed that the WIO group presented the highly significant values for mice body and testis weight, and TC, TG and LDL level in serum (p < 0.05), when compared to the control group. The level of FT, LH and FSH in serum was significantly decreased (p < 0.05) in the WIO group compared with the control group. Seminiferous tubules of testes became thin, and Sertoli cells showed mild atrophy in this group. Also, the count and motility of sperm significantly reduced while the ratio of sperm abnormalities significantly increased in the WIO group compared with the control group (p < 0.05). The results of RT-PCR showed that SYCP3, VEGFA and WT1 genes were significantly downregulated (p < 0.05) in the WIO group compared with the control group.
Conclusions: This study indicated that drinks containing high levels of fat may have negative effects on male fertility due to the reduction of the sexual hormones level in serum, the expression of SYCP3, VEGFA and WT1 genes, count and motility of sperm, as well as an increase in sperm abnormalities and pathological changes in the testicular tissues.
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