子痫前期和妊娠期高血压患者血清Th细胞因子水平及平衡的变化

目的:观察子痫前期与妊娠期高血压患者血清Th1型(IL-2、TNF-α)和Th2型细胞因子(IL-10)水平,以及Th1/Th2比值(IL-2/IL-10、TNF-α/IL-10)的变化,探讨这些变化在子痫前期和妊娠期高血压发病中的作用与意义.方法:采用放射免疫分析法(RIA)测定22例子痫前期、15例妊娠期高血压和32例正常孕妇(对照组)血清IL-2、IL-10和TNF-α浓度,并计算Th1/Th2比值;比较3组间细胞因子水平及Th1/Th2比值的差异.结果:3组间,血清IL-2、IL-10和TNF-α浓度差异均无显著性(P均>0.05).子痫前期组血清IL-2/IL-10比值显著高于对照组(P<0.05),血清TNF-α/IL-10比值显著高于妊娠期高血压组、对照组(P均<0.025).结论:子痫前期患者血清Th1/Th2比值显著增高.血清细胞因子平衡改变是子痫前期的重要病理生理变化,可能与子痫前期的发生、发展有关.

Imbalance of serum T helper 1- and 2-type cytokines in preeclampsia and gestational hypertension

OBJECTIVE: To investigate the changes in serum levels of Th1- (IL-2 and TNF-alpha) and Th2-type cytokines (IL-10) and the ratios of Th1/Th2 (IL-2/IL-10 and TNF-alpha/IL-10) in preeclampsia and in gestational hypertension. METHODS: Levels of IL-2, IL-10 and TNF-alpha were determined with radioimmunoassay in serum samples from 22 women with preeclampsia, 15 women with gestational hypertension and 32 normal term pregnant women. The Th1/Th2 ratios were calculated accordingly. RESULT: There were no significant differences in serum levels of IL-2, IL-10 and TNF-alpha (P>0.05 for all) among normal pregnancy, gestational hypertension and preeclampsia. The ratio of serum IL-2/IL-10 was significantly higher in preeclampsia than that in controls (P < 0.05), and the ratio of TNF-alpha/IL-10 significantly higher in patients with preeclampsia than that in either controls or gestational hypertension (P<0.025 for both). CONCLUSION: Alterations of serum cytokine balance with predominance of Th1 immunity were observed in preeclampsia. These associations may offer insight into the pathogenesis of preeclampsia.