转化生长因子β1及其受体与体外受精-胚胎移植后流产关系的研究

目的　了解转化生长因子β1(TGF- β1)及其受体(TβR)在绒毛及蜕膜组织中的表达,初步探讨TGF- β1与体外受精胚胎移植(IVF- ET)后流产及自然流产的关系。方法　应用免疫组化链霉菌抗生物素蛋白过氧化物酶(SP)连接法,检测10例IVF -ET后流产患者(IVF- ET组)和20例早期自然流产患者(自然流产组)的绒毛及蜕膜组织中的TGF -β1及TβR(Ⅰ、Ⅱ型)表达情况,其表达水平以阳性染色部位的吸光度(A)值表示,并与20例人工流产者(对照组)进行比较。结果　TGF- β1及TβR在早孕绒毛滋养细胞、蜕膜组织腺体及间质细胞中均有阳性染色, 3组表达部位相同。TGF β1在IVF ET组蜕膜及绒毛组织中表达水平(A值,中位数,下同)分别为0 167、0 .199,自然流产组为0 .198、0 .201,对照组为0 .277、0 .274;TβR Ⅰ在IVF- ET组蜕膜及绒毛组织中表达水平为0 144、0 150,自然流产组为0 .202、0. 201,对照组为0 .238、0 .281;TβR Ⅱ在IVF ET组蜕膜及绒毛组织中的表达水平为0 .199、0 .145,自然流产组为0. 153、0 .156,对照组为0 .300、0 .301。上述指标,IVF -ET、自然流产组分别与对照组比较,差异均有统计学意义(P<0. 01)。结论　TGF -β1及TβR在IVF- ET后流产及自然流产患者绒毛及蜕膜组织中的表达下降,在IVF- ET后流产发病中起重要作用,

Study on the correlation of transforming growth factor beta1 and its receptors with spontaneous abortion after in vitro fertilization and embryo transfer

OBJECTIVE: To understand the expressions of transforming growth factor beta1 (TGF-beta1) and its receptors (TbetaR) in villi and decidua during early pregnancy and their effects on early embryo development, and explore the mechanism of spontaneous abortion. METHODS: By immunohistochemical technique, expressions of TGF-beta1 and its receptors were determined in villi and decidua from 10 cases of spontaneous abortion women after in vitro fertilization and embryo transfer (IVF-ET group), 20 cases of spontaneous abortion women (spontaneous abortion group), and 20 cases of normal early pregnancy women (control group). RESULTS: TGF-beta1 and its receptors had high expressions in decidua cells, villus glands and interstitial cytoplasm in all three groups. The average light density of the expressions of TGF-beta1 in the villi and decidua of IVF-ET, spontaneous abortion and control groups were 0.167 and 0.199, 0.198 and 0.201, 0.277 and 0.274, respectively. The intensity of TbetaR-I in the villi and decidua of IVF-ET, spontaneous abortion and control groups were 0.144 and 0.150, 0.202 and 0.201, 0.238 and 0.281, respectively. And the expressions of TbetaR-II in the villi and decidua of IVF-ET, spontaneous abortion and control groups were 0.199 and 0.145, 0.153 and 0.156, 0.300 and 0.301, respectively. The differences between the control group and both abortion groups were all significant (P < 0.01). CONCLUSIONS: The expressions of TGF-beta1 and its receptors in the early pregnancy tissues of aborted women declined. It demonstrates that the abnormal expressions of TGF-beta1 and its receptors play an important role in spontaneous abortion, they are one of the causes of spontaneous abortion.