目的 探讨胆碱能受体激动剂尼古丁对子痫前期大鼠的治疗作用及机制。方法 将30只妊娠SD大鼠分为对照组（n =10）、子痫前期组（n =10）和尼古丁治疗组（n =10）。子痫前期组中,大鼠妊娠第14天注射内毒素（l.0 μg/kg）;对照组给予等量生理盐水2 mL,研究组妊娠第14 天开始皮下注射尼古丁1 mg/（kg·d）至妊娠第19天。检测各组干预前后收缩压、24小时蛋白、妊娠结局和大鼠外周血IL-6,TNF-α,IFN-γ和IL-1β的表达水平。结果 和对照组相比,大鼠动脉收缩压妊娠第14天注射LPS后升高,治疗组中在尼古丁注射后,妊娠第16天、第18天较子痫前期组血压下降（14.99±0.48 vs 16.61±0.55 kPa,15.01±0.60 vs 17.04±0.49 kPa,P<0.05）;大鼠24 h蛋白尿在子痫前期组中妊娠第17、19天升高（P<0.05）,尼古丁治疗组尿蛋白较子痫前期组降低（P <0.05）。妊娠第20天,子痫前期组胎儿重量和对照组相比下降（P <0.05）,尼古丁治疗组较子痫前期模型组胎儿重量增加（P <0.05）。各组间存活胎儿数、胎盘重量差异无统计学意义（P >0.05）。子痫前期组炎性因子IL-6,TNF-α,IFN-γ和IL-1β 较对照组升高,差异有统计学意义;尼古丁治疗组IL-6,TNF-α,IFN-γ 和IL-1β 降低（P <0.05）。结论 胆碱能受体激动剂尼古丁通过降低炎性反应来改善子痫前期大鼠的妊娠结局。

Objective To examine the effects and mechanism of cholinergic receptor agonist nicotine on preeclampsia rats. Methods 30 pregnant SD rats were divided into control group（n=10）,preeclampsia group（n=10） and nicotine treatment group（n=10）.In preeclampsia group,rats were injected LPS（l.0 μg/kg） on the day 14th of gestation,the control rats were injected 2 mL of physical saline on the day 14th of gestation,the rats in nicotine treatment group were injected nicotine 1mg/（kg·d） from the day 14th to the day 19th of gestation. The systolic blood pressure,24 hour urine protein,pregnancy outcome and serum levels of IL-6,TNF-α,IFN-γ and IL-1β were compared between each groups. Results Compared to control group,the systolic blood pressure rose after LPS injection on the day 14th of gestation,the systolic blood pressure in nicotine treatment group decreased on the day 16th and the day 18th of gestation compared to preeclampsia group（14.99±0.48 vs 16.61±0.55 kPa,15.01±0.60 vs 17.04±0.49 kPa,P<0.05）.The 24 hour urine in preeclampsia group rose on day 17 and day 19 of gestation（P <0.05）,which decreased in nicotine group（P <0.05）. The fetal weight were higher in nicotine treatment group compared to the preeclampsia group,there were no statisitical difference in viable fetal number and placental weight among groups. The serum levels of IL-6,TNF-α,IFN-γ IL-1β were higher in preeclampsia group compared to the control group,while nicotine decreased the levels of IL-6,TNF-α,IFN-γ IL-1β（P <0.05）. Conclusion Nicotine improved pregnancy outcome of LPS induced preeclampsia rats by decreasing inflammatory levels.