人白细胞抗原-G mRNA各亚型在重度子(癎)前期胎盘组织中的表达

目的　探讨人白细胞抗原-G(human leukocyte antigen-G,HLA-G)各亚型在早发型、晚发型重度子(癎)前期患者以及正常妊娠产妇胎盘组织中表达的差异. 方法　使用巢式RT-PCR方法检测11例早发型重度子(癎)前期患者、14例晚发型重度子(癎)前期患者以及8例正常分娩产妇胎盘组织中HLA-G各亚型mRNA表达的差异情况. 结果 与正常对照组相比,HLA-G1亚型在早发型和晚发型重度子(癎)前期患者的胎盘组织中表达明显减少(中位数:早发型组1.37,P<0.05;晚发型组24.90,P<0.05;正常对照组46.67,P<0.05).HLA-G2亚型在晚发型重度子(癎)前期患者的胎盘组织中表达水平较高(中位数:早发型组0;晚发型组21.59,P<0.05;正常对照组5.39).HLA-G5亚型在早发型以及晚发型重度子(癎)前期患者的胎盘组织中表达水平增高(中位数:早发型组19.23;晚发型组3.65;正常对照组1.33). 结论 HLA-G膜结合型亚型mRNA在胎盘组织中表达减少以及HLA-G可溶性亚型mRNA在胎盘组织中表达的增高,可能在子(癎)前期的发病机制中起到一定的作用.

Expression of various subtypes of HLA-G mRNA in placentas of pregnant women complicated with severe preeclampsia

Objective To investigate the different expressions of various subtypes of human leukocyte antigen-G(HLA-G)mRNA in placentas among early and late-onset severe preeclamptic and normal pregnant women. Methods Eleven placental samples from early-onset severe preeclamptic pregnancies and fourteen from late-onset severe preeclamptic pregnancies were collected as study group;eight placental samples from normal pregnancies were collected as control group.The levels of HLA-G mRNA in the three groups were measured by nested RT-PCR. Results Compared with the counterparts in the control group,the leveI of HLA-G1 subtype was significantly decreased (median:Early-onset group:1.37,P<0.05;Late-onset group:24.90,P<0.05;Control group:46.67,P<0.05)and the level of HLA-G5 subtype increased(median:Early-onset group 19.23;Late-onset group:3.65;Control group:1.33)in both early and late-onset severe preeclamptic group.The level of HLA-G2 subtype increased(median:Early-onset group:0;Late-onset group:21.59,P<0.05;Control group:5.39)in the late-onset severe preeclamptic group. Conclusion The reduced expression of HLA-G membrane-bound subtype mRNA in the placenta and the increased expression of HLA-G soluble subtype mRNA in the placenta may be related tO the pathogenesis of preeclampsia.