51例早孕妇女绒毛超氧化物歧化酶测定结果分析

本文采用改良的邻革之酚自氧化法,对51例无遗传性疾病早孕妇女绒毛细胞进行了SOD活力测定。其比活力为426.2±48.4u/mg蛋白(x±SD),测定值范围为217.2～589.1u/mg蛋白,P95>915.0u/mg蛋白。     

Activation of mucosal Vβ3+ T cells and tissue damage in human small intestine by the bacterial superantigen,Staphylococcus aureus enterotoxin B

Staphylococcus aureus enterotoxin B (SEB) was added to explants of fetal human intestine in organ culture or administered into the lumen of fetal small intestine prior to culture. Both routes produced a massive increase in lamina propria T cells expressing Vβ33, and to a lesser extent, those expressing Vβ5 and Vβ12. SEB-activated lamina propria T cells produced interleukin-2 and interferon-Y and T cell activation was accompanied by tissue damage, which was inhibited by FK506.     

早期流产患者绒毛中抑制素A、激活素A的表达及其意义

目的:了解抑制素A、激活素A在早孕、先兆流产绒毛中的定位及表达水平;探讨抑制素A、正常妊娠活素A在维持正常早期妊娠中的作用。方法:选取60例(停经天数<60 d)早期妊娠妇女作为研究对象,其中行负压吸宫术者30例为对照组;行吸宫术的先兆流产妇女30例为先兆流产组,留取绒毛组织,应用免疫组织化学技术和计算机图像分析系统检测抑制素A、激活素A在不同早孕流产绒毛组织中的表达。结果:抑制素A、激活素A在对照组、先兆流产组绒毛的合体滋养细胞、细胞滋养细胞、毛细血管内皮细胞的胞浆呈不同程度的阳性染色。通过定量分析,抑制素A、激活素A在先兆流产组绒毛的表达低于对照组,差异有显著性(P<0.05)。结论:胎盘组织分泌的抑制素A、激活素A对于正常妊娠的维持起重要作用;抑制素A、激活素A表达水平的降低在流产发生过程中具有重要作用。     

Acid fibroblast growth factor reduces rat intestinal mucosal damage caused by ischemia-reperfusion insult

AIM: To detect the effects of acid fibroblast growth factor (aFGF) on apoptosis and proliferation of intestinal epithelial cells in differentiation or proliferation status to explore the protective mechanisms of aFGF. METHODS: Wistar rats were randomly divided into sham-operated control group (C, n= 6), intestinal ischemia group (I,n = 6), aFGF treatment group (A, n= 48) and intestinal ischemia-reperfusion group (R,n= 48). Apoptosis of intestinal mucosal cells was determined with terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick-end labeling (TUNEL) technique. Proliferating cell nuclear antigen (PCNA) protein expression and distribution were detected with immunohistochemical method. Plasma levels of D-lactate were determined with modified Brandts method. RESULTS: In A group, administration of exogenous aFGF could improve intestinal histological structure and decrease plasma D-lactate levels at 2-12 h after the reperfusion compared with R group. The apoptotic rates and PCNA protein expressions were not increased until 2 h after reperfusion and were maximal at 12 h. After reperfusion for 2-12 h, the apoptotic rates were gradually augmented along the length of jejunal crypt-villus units. Administration of aFGF could significantly reduce the apoptotic response at 2-12 h after reperfusion (P<0.05). Apoptosis rates in villus and crypt epithelial cells in A group at 12 h after reperfusion were (62.5±5.5)% and (73.2±18.6)% of those in R group, respectively. Treatment of aFGF could apparently induce protein expression of PCNA in intestinal mucosal cells of A group compared with R group during 2-12 h after reperfusion (P<0.05). There were approximately 1.3- and 1.5-times increments of PCNA expression levels in villus and crypt cells in A group at 12 h after reperfusion compared with R group, respectively. CONCLUSION: Intestinal I/R insult could lead to histological structure change and apoptotic rate increment. The protective effects of aFGF against ischemia/reperfusion in rat intestinal mucosa might be partially due to its ability to inhibit ischemia/reperfusion-induced apoptosis and to promote cell proliferation of crypt cells and villus epithelial cells.     

绒毛中TRAIL及其受体的表达与不明原因反复自然流产的相关性的探讨

目的探讨肿瘤坏死因子相关凋亡诱导配体TRAIL及其受体在不明原因早期反复自然流产患者(URSA)绒毛中的表达及二者的相关性。方法选择实验组妊娠45～60 d的URSA患者15例,对照组健康人工流产15例。两组分别取绒毛组织采用免疫组化法检测TRAIL及其受体的表达,进行方差分析和t检验比较两组绒毛组织中TRAIL及其受体蛋白表达水平的差异。结果实验组绒毛组织中TRAIL及其受体DR4、DR5蛋白表达较强,而诱骗受体DcR1及DcR2蛋白与正常对照相比表达较少,P值均小于0.05。结论TRAIL及其受体可能是造成自然流产的机制之一。     

反复自然流产患者绒毛中增殖细胞核抗原（PCNA）的表达及意义

目的探讨增殖细胞核抗原（PCNA）在绒毛与蜕膜组织中的表达与复发性自然流产的关系。方法采用免疫组化方法检测反复自然流产患者和同期妊娠的健康妇女绒毛和蜕膜中PCNA的表达。结果早期自然流产患者绒毛和蜕膜组织中细胞滋养细胞PCNA表达强度弱于正常早期妊娠妇女,其差异具有统计学意义（P〈0．05）。结论PCNA的激活参与了反复自然流产的发病。     

自然流产胚胎绒毛中着丝粒蛋白-H的异常表达与染色体数目异常的相关性研究

目的 探讨自然流产胚胎绒毛中着丝粒蛋白-H (CENP-H)的异常表达与染色体数目异常的相关性. 方法 将96例早期自然流产患者的绒毛组织进行FISH检测,将其分为染色体正常组与染色体异常组,进而对两组患者CENP-H的mRHA及蛋白表达水平进行检测分析. 结果 96例早期自然流产患者绒毛标本的FISH检测成功率为100％,其中染色体正常53例,检出染色体异常43例,异常率为44.8％;其中常染色体数目异常26例,发生率为27.1％;性染色体数目异常10例,发生率为10.4％;性染色体合并常染色体异常3例,发生率为3.1％;三倍体及四倍体各2例,其发生率均为2.1％.相比染色体正常组,染色体异常组患者绒毛CENP-H基因mRNA及蛋白相对表达量均降低,两组差异有统计学意义. 结论 染色体数目异常自然流产胚胎绒毛中CENP-H的异常表达可能是引发胚胎染色体异常分离的因素之一.     

绒毛和胎盘中Jagged-1/Jagged-2的表达与蜕膜中CD56＋NK表达相关性探讨

目的探讨绒毛和胎盘中Jagged-1/Jagged-2的表达与蜕膜中CD56＋NK表达相关性情况。方法分析该院2013年3月—2014年2月收治的妊娠期流产对象42例和正常剖宫产30例的临床资料,对Jagged-1、CD56＋NK细胞和Jagged-2应用免疫组化方法检测,通过对其测定的情况。结果胎盘组Jagged-1高于绒毛组,Jagged-2低于绒毛组,自然流产组Jagged-1、Jagged-2及CD56＋的表达均低于人工流产组,CD56＋NK细胞和绒毛组织中的Jagged-1阳性细胞表达水平、Jagged-2阳性细胞表达水平均呈现明显正相关性,差异有统计学意义（r=0.91,0.95,P〈0.05）。结论 Jagged-1、Jagged-2对NK细胞表型的变化可能两者一起参与,因而对妊娠结局造成影响,并且形成妊娠免疫耐受。     

孕期妇女及胎儿弓形虫感染的研究

弓形虫病是一种人畜共患的寄生虫病，孕妇感染弓形虫可致习惯性流产、死胎、胎儿畸形和出生缺陷，严重危害孕妇和小儿健康。本文采用多聚酶链反应的体外基因扩增技术，对７０例曾有流产史的早期孕妇作绒毛ＰＣＲ检查，结果有１例为阳性，阳性检测率为１．４３％；２０例有不良生育史（头小畸形、脑垂体后叶病、脑发育不全、红斑狼疮等）的中期妊振妇女（５个月以内）作羊水ＰＣＲ检查，有２例为阳性，阳性检测率为１０％；５０例妊娠５个月以上的妇女外用血及她们所生的新生儿脐血作ＰＣＲ检查，未发现阳性结果；对２例检查阳性孕妇作Ｂ型超声波检查，发现１例为无脑儿，１例为脑积水。据此，弓形虫感染直接影响着优生优育。