吲哚胺2,3-双加氧酶在子痫前期病人胎盘组织表达

目的探讨吲哚胺2,3-双加氧酶(IDO)在胎盘组织表达与子痫前期发病的关系。方法采用免疫组化法分别检测30例轻度子痫前期病人、30例重度子痫前期病人和38例正常晚孕妇女胎盘组织IDO蛋白表达,并采用Motic Med 6.0数码医学图像分析系统分析各组图片IDO阳性细胞的平均吸光度值;RT-PCR法检测各组孕产妇胎盘组织IDO mRNA的表达水平;彩色超声多普勒检测各组孕妇胎儿脐动脉血流阻力指数(RI),并分别测量各组新生儿出生体质量。结果各组孕产妇胎盘组织均有IDO蛋白表达,且主要表达于胎盘合体滋养细胞的胞质中,胎盘间质细胞及血管内皮细胞胞质中也可见少量表达。轻度子痫前期组及重度子痫前期组孕产妇胎盘组织IDO阳性细胞平均吸光度明显高于正常晚孕组,差异有显著性(F=462.895,q=3.474、11.002,P<0.01);重度子痫前期组高于轻度子痫前期组,差异有统计学意义(q=22.491,P<0.01)。轻度及重度子痫前期组胎盘组织IDOmRNA表达水平较正常晚孕组显著降低,差异均有统计学意义(F=90.032,q=8.457、16.913,P<0.01);且重度子痫前期组胎盘组织IDO mRNA表达水平明显低于轻度子痫前期组,差异有统计学意义(q=8.000,P<0.01)。子痫前期组孕产妇胎盘组织IDO mRNA表达水平与其胎儿脐动脉RI呈负相关(r=-0.445,P<0.01),与其新生儿出生体质量呈正相关(r=0.449,P<0.01)。结论子痫前期病人胎盘组织IDO表达下降可能是子痫前期发病的原因之一。

EXPRESSION OF INDOLEAMINE 2,3-DIOXYGENASE IN PRE-ECLAMPTIC PLACENTA

Objective To investigate the expression of indoleamine 2,3-dioxygenase(IDO) in placenta and its relationship with pre-eclamptic morbidity. Methods By using immunohistochemical technique,the expression of IDO in placenta was detected in 30 patients with mild,30 with severe preeclampsia(PE) and 38 normal late pregnancies.The average optical density(AOD) of IDO positive cells in each picture was valued by Motic Med 6.0.analysis system.Semiquantitative RT-PCR was used to investigate the expression of IDO mRNA i...