热激蛋白70在自发性早产有无伴发组织学绒毛膜羊膜炎中表达差异的对比分析
2019-08-19宋秀玲葛静闫硕杨楠
宋秀玲 葛静 闫硕 杨楠
【摘要】 目的:分析熱激蛋白70(heat shock protein 70,HSP70)在自发性早产(spontaneous preterm birth,SPB)有无伴发组织学绒毛膜羊膜炎(histologic chorioamnionitis,HCA)患者表达差异情况及两者关联性。方法:选择2014年1月-2018年6月北部战区总医院收治的86例SPB临产患者,以胎膜组织的病理结果进一步分为SPB伴发HCA组(有HCA组,39例)与SPB未伴发HCA组(无HCA组,47例);另外选取同期住院正常足月分娩者50例作为对照组。统计比较各组脐静脉血、外周静脉血、胎膜组织的HSP70浓度,以及HSP70 mRNA在胎膜组织中水平。结果:(1)有HCA组的HSP70浓度[外周静脉血(1.63±0.25)ng/mL、脐静脉血(0.97±0.10)ng/mL、胎膜组织(1.03±0.07)]较无HCA组[(1.27±0.20)ng/mL、(0.76±0.07)ng/mL、(0.88±0.05)]均明显增高,同时也均较对照组[(0.78±0.10)ng/mL、(0.55±0.08)ng/mL、(0.51±0.03)]均明显增高(F=15.117、11.148、13.624,P<0.05)。(2)有HCA组的新生儿败血症(15.4%)较无HCA组(0)、对照组(0)均明显增高(字2=9.638,P<0.05)。(3)有HCA组的外周静脉血HSP70表达与脐静脉血、胎膜组织HSP70表达有明显正相关性(r=0.889、0.931,P<0.05)。结论:SPB并存HCA时,HSP70在脐静脉血、外周静脉血、胎膜组织中的表达均明显增高,HSP70可能与SPB以及新生儿败血症的发生相关。
【关键词】 早产; 绒毛膜羊膜炎; 热激蛋白70; 新生儿
【Abstract】 Objective:To investigate the relationship between the expression of heat shock protein 70(HSP70)in spontaneous preterm birth(SPB)with or without histologic chorioamnionitis(HCA).Method:From January 2014 to June 2018,86 cases of SPB were included from the General Hospital of Northern War Zone,they were further divided into two groups by pathologic analysis of fetal membrane:SPB with HCA group(n=39)and SPB without HCA group(n=47).In addition,50 cases of normal full-term delivery were selected as the control group.The levels of HSP70 protein in umbilical vein blood,peripheral venous blood and fetal membrance tissue were detected by enzyme-linked immunosorbent assay(ELISA).Levels of HSP70 and HSP70 mRNA were detected in fetal membrane by immunohistochemistry and Western blotting and real-time PCR.Result:(1)HSP70 expression[peripheral venous blood(1.63±0.25)ng/mL,umbilical veid blood(0.97±0.10)ng/mL,fetal membrance tissue(1.03±0.07)]in SPB with HCA group were all higher than those of SPB without HCA group[(1.27±0.20)ng/mL、(0.76±0.07)ng/mL、(0.88±0.05)]and the control group[(0.78±0.10)ng/mL、(0.55±0.08)ng/mL、(0.51±0.03)],and the difference were statistically significant(F=15.117,11.148,13.624,P<0.05).(2)The incidence of neonatal sepsis in SPB with HCA group was higher than that of the other two groups(字2=9.638,P<0.05).(3)The levels of HSP70 in peripheral venous blood of HCA group were positively correlated with in umbilical vein blood and fetal membrance tissue with HCA group(r=0.889,0.931,P<0.05).Conclusion:HSP70 expression increases umbilical vein blood,peripheral venous blood and fetal membrance tissue of SPB with HCA,which may be involved in the pathogenesis of SPB and neonatal sepsis.
3.2 HSP70和SPB并存有HCA关联性 Chaiworapongsa等[14]的一项体外实验结果发现,在将内毒素添加至人绒毛膜羊膜细胞后,检测到HSP70浓度明显增加。陶贝贝等[15]研究证实,当孕妇宫内出现感染时其羊水内检测HSP70浓度显著升高,且HSP70浓度与羊水检测的白细胞水平有显著正相关性。本研究结果显示,在有HCA组外周静脉血HSP70的表达与脐静脉血、胎膜组织的表达均有明显正相关性(r=0.889、0.931,P<0.05),推测HSP70表达的增加与SPB并发HCA有明显相关性。当患者宫内有感染发生时,HSP70可以通过被动(细胞坏死)或主动(Exosome介导)的方式向细胞外释放。相关报道也证实,HSP70细胞外的释放也可以通过细胞表面相关受体激活核转录因子-κB以及促炎性细胞因子如白细胞介素-1或白细胞介素-6、趋化因子-1等[16-18]。
3.3 HSP70和妊娠结局关联性 三组中均无一例出现产后出血、产褥感染、胎盘早剥发生率比较,差异均无统计学意义(P>0.05),可能与本院近年来提高对产科并发症关注、产后有效使用促宫缩药物及抗生素等有关。另外无HCA组、对照组无一例发生新生儿败血症,而有HCA组发生率约15.4%,较其他两组显著升高,差异有统计学意义(P<0.05),且有HCA组外周静脉血与脐静脉血的HSP70表达呈明显正相关性(r=0.889,P<0.05)。可能因新生儿败血症时体内巨噬细胞、中性粒细胞等被激活而导致HSP70表达增加[19-20]。
综上,相对于正常足月分娩者,在SPB者外周静脉血、脐静脉血、胎膜组织中HSP70水平均明显增高,HSP70可能参与到了SPB发生的機制;而相对于SPB无HCA者,SPB并发有HCA者的HSP70表达亦明显增高,同时与新生儿败血症的发生有相关性。但对SPB并发HCA者诊断及治疗仍需深入探索HSP70的作用。
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(收稿日期:2019-01-16) (本文编辑:程旭然)