目的观察经孕鼠尾静脉注射合体滋养细胞微粒(syncytiotrophoblast microparticles STBM)后,小鼠肾功能及肾脏病理改变。方法收集孕18 d C57小鼠的胎盘,制备小鼠合体滋养细胞微粒,利用电镜观察C57小鼠STBM的形态结构,BCA法测定C57小鼠STB...目的观察经孕鼠尾静脉注射合体滋养细胞微粒(syncytiotrophoblast microparticles STBM)后,小鼠肾功能及肾脏病理改变。方法收集孕18 d C57小鼠的胎盘,制备小鼠合体滋养细胞微粒,利用电镜观察C57小鼠STBM的形态结构,BCA法测定C57小鼠STBM的蛋白水平;将C57孕鼠分为STBM组、对照组和PBS组,STBM组:自C57小鼠孕8 d起,每天以蛋白浓度为0.15 mg/m L的STBM(0.2 m L)经鼠尾静脉回输至小鼠体内,至孕18 d时收集小鼠24 h尿液测定尿微量蛋白(M-TP)、尿肌酐(U-Crea)、尿蛋白肌酐比(M-TP/Cr)、尿酸(U-Uric)、24 h尿蛋白(24 h U-TP),采集全血测定血清尿素氮(BUN)、肌酐(Scr)、胱抑素C(Cys-C),取肾脏标本切片后行HE染色观察肾组织结构变化;对照组:正常孕18 d小鼠收集尿液、采集全血、取肾脏进行检测;PBS组:自孕8 d起每天经鼠尾静脉注射PBS 0.2 m L,余处理同STBM组。结果 STBM组孕鼠尿液M-TP、M-TP/Cr、24 h U-TP明显高于对照组和PBS组(P<0.01),与对照组比较,PBS组U-Uric未见明显变化(P>0.05),而STBM组U-Uric显著降低(P<0.01);STBM组血清BUN、Scr、Cys-C含量显著升高(P<0.01);STBM组肾脏HE染色可见肾小球内皮细胞增生、肿胀、变形,肾小管云雾状变性。结论类子痫前期模型鼠有肾损伤,STBM可能在子痫前期肾损害中起重要作用。展开更多
Objective: The purpose of this study was to determine syncytiotrophoblast intercellular adhesion molecule- 1 expression in villitis and in normal chorionic villi from term (37- 42 weeks of gestation) placentas with or...Objective: The purpose of this study was to determine syncytiotrophoblast intercellular adhesion molecule- 1 expression in villitis and in normal chorionic villi from term (37- 42 weeks of gestation) placentas with or without villitis. Study design: A cross-sectional study was conducted to determine syncytiotrophoblast intercellular adhesion molecule- 1 expression in villitis (n = 16) and in normal villi from placentas with or without villitis (n = 16). Villitis was diagnosed with antibodies to human leukocyte antigen- DR and CD3 and hematoxylin and eosin staining of serial sections; intercellular adhesion molecule- 1 reactivity in syncytiotrophoblast was confirmed with antibodies to intercellular adhesion molecule- 1 and cytokeratin. Results: Villitis lesions had higher syncytiotrophoblast intercellular adhesion molecule- 1 expression than normal chorionic villi from placentas with (19.9% vs 3.5% villi; P < .001) or without (19.9% vs 0.31% villi; P < .001) villitis. Normal villi from placentas with villitis had higher syncytiotrophoblast intercellular adhesion molecule- 1 than villi from placentas without villitis (3.5% vs 0.31% villi; P <.001). Conclusion: Placentas with villitis have significantly more syncytiotrophoblast intercellular adhesion molecule- 1 expression than placentas without villitis. The finding that normal villi from placentas with villitis have more syncytiotrophoblast intercellular adhesion molecule1 than normal villi from placentas without villitis suggests that syncytiotrophoblast intercellular adhesion molecule- 1 could be the first step in villitis development.展开更多
文摘目的观察经孕鼠尾静脉注射合体滋养细胞微粒(syncytiotrophoblast microparticles STBM)后,小鼠肾功能及肾脏病理改变。方法收集孕18 d C57小鼠的胎盘,制备小鼠合体滋养细胞微粒,利用电镜观察C57小鼠STBM的形态结构,BCA法测定C57小鼠STBM的蛋白水平;将C57孕鼠分为STBM组、对照组和PBS组,STBM组:自C57小鼠孕8 d起,每天以蛋白浓度为0.15 mg/m L的STBM(0.2 m L)经鼠尾静脉回输至小鼠体内,至孕18 d时收集小鼠24 h尿液测定尿微量蛋白(M-TP)、尿肌酐(U-Crea)、尿蛋白肌酐比(M-TP/Cr)、尿酸(U-Uric)、24 h尿蛋白(24 h U-TP),采集全血测定血清尿素氮(BUN)、肌酐(Scr)、胱抑素C(Cys-C),取肾脏标本切片后行HE染色观察肾组织结构变化;对照组:正常孕18 d小鼠收集尿液、采集全血、取肾脏进行检测;PBS组:自孕8 d起每天经鼠尾静脉注射PBS 0.2 m L,余处理同STBM组。结果 STBM组孕鼠尿液M-TP、M-TP/Cr、24 h U-TP明显高于对照组和PBS组(P<0.01),与对照组比较,PBS组U-Uric未见明显变化(P>0.05),而STBM组U-Uric显著降低(P<0.01);STBM组血清BUN、Scr、Cys-C含量显著升高(P<0.01);STBM组肾脏HE染色可见肾小球内皮细胞增生、肿胀、变形,肾小管云雾状变性。结论类子痫前期模型鼠有肾损伤,STBM可能在子痫前期肾损害中起重要作用。
文摘Objective: The purpose of this study was to determine syncytiotrophoblast intercellular adhesion molecule- 1 expression in villitis and in normal chorionic villi from term (37- 42 weeks of gestation) placentas with or without villitis. Study design: A cross-sectional study was conducted to determine syncytiotrophoblast intercellular adhesion molecule- 1 expression in villitis (n = 16) and in normal villi from placentas with or without villitis (n = 16). Villitis was diagnosed with antibodies to human leukocyte antigen- DR and CD3 and hematoxylin and eosin staining of serial sections; intercellular adhesion molecule- 1 reactivity in syncytiotrophoblast was confirmed with antibodies to intercellular adhesion molecule- 1 and cytokeratin. Results: Villitis lesions had higher syncytiotrophoblast intercellular adhesion molecule- 1 expression than normal chorionic villi from placentas with (19.9% vs 3.5% villi; P < .001) or without (19.9% vs 0.31% villi; P < .001) villitis. Normal villi from placentas with villitis had higher syncytiotrophoblast intercellular adhesion molecule- 1 than villi from placentas without villitis (3.5% vs 0.31% villi; P <.001). Conclusion: Placentas with villitis have significantly more syncytiotrophoblast intercellular adhesion molecule- 1 expression than placentas without villitis. The finding that normal villi from placentas with villitis have more syncytiotrophoblast intercellular adhesion molecule1 than normal villi from placentas without villitis suggests that syncytiotrophoblast intercellular adhesion molecule- 1 could be the first step in villitis development.
文摘目的:观察妊娠期糖尿病(gestational diabetes mellitus,GDM)孕妇胎盘滋养细胞超微结构,探讨铁死亡在GDM发生发展中的作用。方法:选取2020年9月—2022年12月在常州妇幼保健院分娩的孕妇,孕24~28周行口服葡萄糖耐量试验。以确诊GDM的孕产妇为研究对象,分为通过饮食治疗控制血糖满意组(G1组)、口服二甲双胍控制血糖组(G2组)、胰岛素控制血糖组(G3组)、血糖控制不满意但拒用药组(G4组)各30例,正常健康孕妇为对照组(N组)。通过透射电镜观察各组胎盘滋养细胞超微结构;普鲁士蓝染色检查胎盘铁沉积情况;免疫组化检测胎盘长链脂酰辅酶A合成酶4(acyl-CoA synthetase long chain family member 4,ACSL4)、谷胱甘肽过氧化物酶4(glutathione peroxidase 4,GPX4)在合体滋养细胞层的定位和表达;Western blot和q RT-PCR分别检测胎盘ACSL4、GPX4蛋白和mRNA转录水平。结果:透射电镜下G1、G2、G3、G4组GDM产妇胎盘均可见不同程度的线粒体形态学改变,其中G1、G2、G3组线粒体改变较轻,G4组见典型的铁死亡萎缩线粒体。普鲁士蓝染色显示5组胎盘均见含铁颗粒,G1、G2、G3、G4组胎盘中含铁颗粒较N组明显增多,G1、G2、G3组胎盘中的含铁颗粒较G4组明显减少。Western blot结果显示,与N组相比,G1、G2、G3、G4组产妇胎盘中ACSL4蛋白表达增加而GPX4蛋白表达下降,qRT-PCR结果显示各组间ACSL4、GPX4的mRNA转录水平无显著性差异。结论:GDM孕妇胎盘滋养细胞中存在铁死亡,且与病情严重程度和用药相关。GDM孕妇胎盘中ACSL4、GPX4表达异常,二甲双胍和胰岛素有改善胎盘滋养细胞铁死亡的作用。
