MicroRNA-3162-3p在儿童原发性免疫性血小板减少症不同临床分期中的表达及其意义

Expression of MicroRNA-3162-3p in Different Clinical Stages of Children with Primary Immune Thrombocytopenia and Its Significance

目的:探讨microRNA-3162-3p在儿童原发性免疫性血小板减少症(ITP)不同临床分期中的表达及其意义。方法:纳入96例ITP患儿,按照病程的不同将其分为新诊断组(病程<3个月,40例)、持续性组(病程3-12个月,30例)、慢性组(病程>12个月,26例),同期选择80例健康儿童作为对照组。分离并培养ITP患儿与健康儿童的外周血单个核细胞(PBMNC),采用实时荧光定量PCR法检测外周血PBMNC中microRNA-3162-3p的表达情况,ELISA法检测受试者外周血PBMNC中IL-17、IL-23、IL-10、TGF-β的含量。Spearman相关性分析microRNA-3162-3p与血小板计数、IL-17、IL-23、IL-10、TGF-β的相关性。结果:与对照组相比,ITP患儿的外周血PBMNC中microRNA-3162-3p、IL-10的表达及血小板计数显著下降(P<0.05),IL-17、IL-23、TGF-β显著升高(P<0.05);随着病程的延长,microRNA-3162-3p、IL-10在PBMNC中的表达及血小板计数均显著下降(P<0.05),IL-17、IL-23、TGF-β的表达显著升高(P<0.05)。MicroRNA-3162-3p在ITP患儿PBMNC中的表达与血小板数、IL-10呈正相关(r=0.716、0.667),与IL-17、IL-23、TGF-β呈负相关(r=-0.540、-0.641、-0.560)。结论:MicroRNA-3162-3p在ITP患儿PBMNC中的表达明显降低,参与调控Th17/Treg的失衡,可作为ITP潜在的治疗靶点。

Objective:To explore the expression of microRNA-3162-3p in different clinical stages of childhood primary immune thrombocytopenia(ITP)and its significance.Methods:Ninety-six children with ITP were enrolled and divided into new diagnosis group(n=40),persistent group(n=30)and chronic group(n=26)according to the course of disease.80 healthy children were selected as the control group.Peripheral blood mononuclear cells(PBMNC)of ITP children and healthy children were isolated and cultured,and the expression of microRNA-3162-3p in PBMNC of subjects was detected by real-time fluorescence quantitative PCR.The contents of IL-17,IL-23,IL-10 and TGF-βin PBMNC of subjects were determined by ELISA.The correlation between microRNA-3162-3p and platelet count,IL-17,IL-23,IL-10 and TGF-βwas analyzed.Results:Compared with the control group,the expression of microRNA-3162-3p and IL-10 in PBMNC and platelet count of ITP children were significantly decreased(P<0.05),while IL-17,IL-23 and TGF-βwere significantly increased(P<0.05).With the prolongation of the disease course,the expressions of microRNA-3162-3p and IL-10 in PBMNC and platelet count were significantly decreased(P<0.05),while the expressions of IL-17,IL-23 and TGF-βwere significantly increased(P<0.05).The expression of microRNA-3162-3p in PBMNC was positively correlated with platelet count and IL-10(r=0.716,0.667),and negatively correlated with IL-17,IL-23,and TGF-β(r=-0.540,-0.641,-0.560).Conclusion:MicroRNA-3162-3p expression is significantly reduced in PBMNC of children with ITP,and is involved in the regulation of Th17/Treg imbalance,which can be used as a potential therapeutic target of ITP.