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.     

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。     

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。     

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。     

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。     

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。     

药流对人绒毛和蜕膜内层粘连蛋白表达的影响

目的:观察应用米非司酮配伍米索前列醇终止妊娠的早孕者,分析不同结局的绒毛和蜕膜内层粘连蛋白(laminin,LN)表达情况,探讨米非司酮对人绒毛和蜕膜内LN表达的影响。方法:收集来我院因宫内早孕要求终止妊娠且孕龄小于49 d者,其中药物完全流产者30例,药物不全流产者30例,另选取30例手术流产者作为对照组。取2组应用药物流产者服药第3天排出的绒毛和蜕膜及对照组当天负压吸引吸出的绒毛、蜕膜组织,应用免疫组化法测定3组绒毛、蜕膜组织中LN的表达情况。结果:3组间的年龄、孕囊直径大小、流产前血清雌二醇(E2)、孕酮(P)、β特异性绒毛膜促性腺激素(β-HCG)水平均无统计学差异。手术流产组绒毛、蜕膜中的LN阳性表达率及强阳性表达率最高,明显高于应用药物流产的2组,而药物完全流产组中LN的阳性表达率及强阳性表达率最低,3组间绒毛、蜕膜中LN的表达水平均有统计学差异(P<0.05)。结论:米非司酮通过降低早孕绒毛、蜕膜中LN的表达,从而改变胚胎着床需要的宫内发育内环境,以起到抗早孕作用,可在细胞外基质水平解释药物流产不同结局的病理机制。