小鼠痛经模型的建立

The establishment of the dysmenorrhea model in mice

目的 建立简便、经济、可靠、重现性好的小鼠痛经模型。方法 雌激素给小白鼠灌胃 ,连续 3～ 2 5d ,末次给药后腹腔注射催产素 ,产生扭体 ,记录扭体潜伏期和扭体次数 ,不同条件下 ,组间比较 ,筛选最佳条件。结果 最佳雌激素为己烯雌酚 ,其最佳剂量为 2mg·kg-1;用药周期 12～ 15d时扭体次数最多 ;催产素最佳剂量为 2 0U·kg-1;催产素给药次数对扭体数无明显影响 ;模型建立后可维持约 1wk ;催产素诱发扭体作用大于PGF2α(P <0 0 5 ) ;与相同方法建立的大鼠痛经模型比较 ,扭体次数约是大鼠模型的 6倍 ;扭体次数 90 %集中在注射后 0～ 30min内 ;小鼠扭体次数存在个体差异 ;小鼠例数与其扭体变化率呈负相关 ;在体子宫研究表明 ,小鼠子宫活动度增加。结论 小鼠痛经模型是一个简便、经济、可靠。

AIM To establish a dysmenorrhea model in mice. METHODS The mice were given with some kinds of oestrogens once a day for 3～25 days. On the last day, the mice were injected intraperitoneally with oxytocin and the number of twisting body was recorded to evaluate the intensity of dysmenorrhea. The optimum conditions to establish the model was analysed statisticly. RESULTS The optimum oestrogens was stilbestrol. Stibestrol should be given for 12～15 days. The regression equation of the dose effect curve of stibestrol was =0 03±0 04 X, r =0 9688. The optimum dosage of oxytocin was 20 U·kg -1 . The dysmenorrhea model in mice could be preserved for about 7 days. 90% of the twisting body reactions concentrated in 0～30 minutes after oxytocin was given. The effect of oxytocin (20 U·kg -1 ) had significent difference with that of prostaoglantin (1 3 mg·kg -1 ). The test of uterus in vivo showed that stilbestrol could increase the uterine contraction frequency and strengthen the contractility. The dysmenorrhea model in mice was testified by some anti dysmenorrhea drugs. CONCLUSION Compared with the hypodermic implantation in rats, the dysmenorrhea model in mice was simple, reliable, economical and testifiable,etc.