原因不明复发性流产患者调节性T淋巴细胞对树突状细胞的调控作用

目的 探讨原因不明复发性流产(URSA)患者外周血和蜕膜组织中CD+4CD+25调节性T淋巴细胞(Tr细胞)对树突状细胞(DC)的调控作用.方法 采集4例URSA患者(流产组)和4例正常早孕妇女(对照组)的外周血和蜕膜组织,密度梯度离心法、免疫磁珠分离法分选出Tr细胞和DC,培养6 d,培养方法分为DC单独培养和Tr细胞与Dc混合培养.酶联免疫吸附试验(ELISA)检测两种方法培养的细胞培养上清液中辅助性T淋巴细胞(Th)1型细胞因子--γ干扰素(IFN-γ)的Th2型细胞因子--白细胞介素10(IL-10)的蛋白含量.结果 (1)外周血:流产组细胞混合培养和单独培养后,细胞培养上清液中IFN-γ蛋白含量为(22.5±3.0)、(23.2±0.7)ng/L,两者比较,差异无统计学意义(P>0.05);IL-10蛋白含量分别为(35±4)、(37±7)ng/L,两者比较,差异也无统计学意义(P>0.05).对照组细胞混合培养和单独培养后,IFN-γ蛋白含量为(36±1.1)、(30.5±4.0)ns/L,两者比较,差异无统计学意义(P>0.05);IL-10蛋白含量分别为(36±9)、(54±20)ng/L,两者比较,差异有统计学意义(P<0.01).(2)蜕膜组织:流产组细胞混合培养和单独培养后,IFN-γ蛋白含量分别为(24.4±2.5)、(23.4±2.6)ng/L,两者比较,差异无统计学意义(P>0.05);IL-10蛋白含量分别为(25±5)、(28±7)ng/L,两者比较,差异也无统计学意义(P>0.05);对照组细胞混合培养后,IFN-γ蛋白含量为(22.6±3.8)ng/L,明显低于单独培养后的(30.7±4.6)ng/L,差异有统计学意义(P<0.01);对照组细胞混合培养后,IL-10蛋白含量为(31±9)ng/L,明显高于单独培养后的(27±6)ng/L,差异也有统计学意义(P<0.05).结论 URSA患者Tr细胞抑制性免疫功能下降,从而导致对DC调控失常,Th1/Th2平衡失调和母胎免疫耐受异常.

Regulative effects of regulatory T cells on dendric cells in peripheral blood and deciduas from unexplained recurrent spontaneous abortion patients

Objective To studythe effect of CD+4CD+25 regulatory T(Tr)cells on dendric cells(DC)in peripheral blood and deciduas from unexplained recurrent spontaneous abortion(URSA)patients.Methods Four URSA patients(abortion group)and 4 normal early pregnant women(control group)were enrolled in this study.Tr cells and DC in the peripheral blood and deciduas were isolated using Ficoll density gradient centrifugation and magnetic cell sorting(MACS).DC were cultured alone(DC alone)or in combination with Tr cells(DC+Tr)for 6 days,during which the release of interferon(IFN)-γandinterleukin(IL)-10 in the medium was subsequently measured by enzyme linked immunoadsorbent assay (ELISA).Results(1) Peripheral blood:there was no significant difference in IFN-γlevel between DCalone(23.2±0.7)ng/L and DC+Tr(22.5±3.0)ng/L in abortion group(P>0.05).The similar level of IL-10 was observed between DC alone(37±7)ng/L and DC+Tr(35±4)ng/L in abortion group(P>0.05).IL-10 level,but not IFN-γ,was significantly hisber in DC alone(54±20)ns/L than that in DC+ Tr(36±9)ng/L in control group(P<0.01).(2)Deciduas:there was no significant difference in IFN-γlevel between DC alone(23.4±2.6)ng/L and DC+Tr(24.4±2.5)ng/L in abortion group(P>0.05).Moreover,Similar IL-10 level was found between DC alone(28±7)ng/L and DC+Tr(25±5)ng/L in abortion group(P>0.05).IFN-γlevel in CD alone(30.7±4.6)ng/L was significantly higher than that in DC+Tr(22.6±3.8)ng/L in control group(P<0.01);whereas IL-10 level was much lower in DC alone (27±6)ng/L than that in DC+Tr(31±9)ng/L in control group(P<0.05).Conclusion The decreasing of immunosuppressive funetion of Tr eell of URSA patients affect its regulation on DC.resulting in imbalance of Th1/Th2 and abnormality of maternal-fetal jmmuno-tolerence in URSA.