硝普钠和L-硝基-精氨酸甲酯对大鼠睾丸生精细胞凋亡的影响

目的　观察硝普钠 (SNP)和L 硝基 精氨酸甲酯 (L NAME)对大鼠睾丸生精细胞凋亡的影响。　方法雄性SD大鼠分为 4组 :分别于腹腔内注射SNP、L NAME、SNP +L NAME与生理盐水 ,每天 1次 ,共 12d。颈动脉放血处死动物。流式细胞术 (FCM)结合TUNEL法检测睾丸生精细胞的凋亡。　结果　FCM结合TUNEL法检测发现SNP组亚单倍体峰 (AP峰 )及凋亡指数 (AI)较生理盐水组明显增高 ,L NAME组AP峰及AI显著低于生理盐水组 (P<0 0 1)。SNP和L NAME混合注射时 ,AP峰及AI与生理盐水组无显著性差异 (P >0 0 5 )。　结论　SNP促进生精细胞的凋亡 ,L NAME抑制生精细胞的凋亡 ,其对生精细胞凋亡的调节可能是由一氧化氮 (NO)介导的。

EFFECT OF SODIUM NITROPRUSSIDE AND N-NITRO-L-ARGININE-MYTHEL-ESTER ON APOPTOSIS OF SPERMATOGENIC CELLS IN RAT TESTIS

Objective To evaluate the effect of sodium nitroprusside(SNP)and N-nitro-l-arginine-mythel-ester (L-NAME) on apoptosis of spermatogenic cells in rats. Methods Fourty adult male Sprague-Dawley rats (60-70days) were divided into four groups.Each group was injected intraperitoneally with one of the following agents, once a day, for 12 days: 1. SNP; 2.L-NAME;3.SNL+L-NAME;4.Normal saline NS group.Two hours after the last time injection the rats were sacrificed.TUNEL staining and flow cytometry analysis were used to detect the apoptosis of spermatogenic cells. Results Sub-monoploid and apoptosis index (AI) in SNP group was significantly higher than that of NS group and sub-monoploid and apoptosis index (AI) in L-NAME group were significantly lower than that of NS group by FCM and TUNEL (P<0.01).No significant difference between the NS group and the SMP+L-NAME group (P>0.5) was found.Conclusion SNP can accelerate the apoptosis of spermatogenic cells and L-NAME can inhibite the apoptosis of spermatogenic cells,The effect of SNP and L-NAME on apoptosis of spermatogenic cells probably occurs through the action of nitric oxide.