ADM基因在正常孕妇与子痫前期孕妇妊娠晚期胎盘组织表达的研究

目的ADM在调节母亲血管对妊娠过程和胎儿的适应性及胚胎循环等方面发挥着绝对重要的作用,为阐明ADM基因在正常孕妇与子痫前期胎盘组织的表达差异,以探索ADM及其信号通路的改变在致子痫前期发生的分子病理机制中的重要性。方法取妊娠晚期正常孕妇(≥39周,n=7)和子痫前期孕妇胎盘组(≥35周,n=10),分别采用NorthernBlotting方法和免疫组化技术比较正常孕妇与子痫前期孕妇胎盘组织中ADM基因在mRNA和蛋白质水平表达的差异。结果与正常孕妇相比,子痫前期孕妇胎盘组织中ADM基因mRNA的表达降低了(36.2±6.3)%。采用t-检验进行统计表明二者差异显著(P<0.05);且子痫前期孕妇胎盘组织中ADM蛋白的表达也明显减少。结论子痫前期孕妇妊娠晚期胎盘组织ADM基因的表达明显降低,这可能是子痫前期患者发病的可能机制之一。

Differential expression of adrenomedullin in the placentas of women with normal and preeclamptic pregnancies in late term

OBJECTIVE: To investigate the differential expression of adrenomedullin (ADM) in the placentas of women with normal and preeclamptic pregnancies, and explore the importance of ADM and its signal pathway in the development of preeclampsia. METHODS: Ten pregnant women complicated with preeclampsia during the late term(>or=35 wk) were selected for this study along with 7 normal control pregnant women (>or=39 wk). The total RNA was extracted and sections of fresh placental tissues were prepared, and ADM expressions at mRNA and protein levels in women with normal and preeclamptic pregnancies were determined by Northern blotting and immunohistochemistry, respectively. RESULT AND CONCLUSION: At both mRNA and protein levels, the expression of ADM in the placentas of preeclamptic women was significantly reduced obviously as compared with that of the normal control (P<0.05), suggesting that ADM expression reduction in preeclamptic placenta might be associated with the development of preeclampsia.