鎘對(duì)雄性大鼠脊髓下腰段運(yùn)動(dòng)神經(jīng)元的影響
[Abstract]:Objective to study the effects of cadmium on the ultrastructure of SNB and DLN motor neurons and the expression of androgen receptor (AR) in the lower lumbar spinal cord of adult male rats. Methods male adult rats were injected with cadmium chloride (0.5mg/kg body weight and 1.0mg/kg body weight alternately) and testosterone propionate (TP) 500 渭 g) subcutaneously injected intraperitoneally. Serum testosterone levels were measured. The spinal cord L5-6 segments were taken for AR immunohistochemistry and optical density (OD) analysis of SNB and DLN motor neurons. The ultrastructure of SNB and DLN motor neurons was observed by transmission electron microscope. The content of CD in spinal cord was measured by atomic absorption graphite furnace method. Results the content of CD in spinal cord increased after cadmium exposure, and the serum testosterone level decreased significantly after 30 days of cadmium exposure. The mean OD value of AR immunostaining in neurons decreased after 7 days and 10 days and 15 days after exposure to cadmium, but the average OD value of AR was not significantly increased at 2 hours after subcutaneous injection of TP. After 30 days of cadmium exposure, the average OD value of AR decreased further, and the average OD value of TP increased at 2 h after subcutaneous injection, but only reached the level of 10 days or 15 days after exposure to cadmium alone for 7 days or 10 days. The ultrastructure of neurons did not change after cadmium exposure. Conclusion cadmium accumulates in the spinal cord of adult rats and results in functional damage of SNB and DLN motor neurons, which may be related to the sexual dysfunction caused by cadmium.
【作者單位】: 重慶醫(yī)科大學(xué)電子顯微鏡室 重慶醫(yī)科大學(xué)電子顯微鏡室
【分類號(hào)】:R114
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