MiR-29b在紫癜性肾炎肾组织中的表达及其功能研究
发布时间:2018-05-20 01:27
本文选题:紫癜性肾炎 + 新月体 ; 参考:《南京医科大学》2013年硕士论文
【摘要】:第一部分MiR-29b在紫癜性肾炎肾组织中的表达 目的检测miR-29b在儿童紫癜性肾炎(Henoch Sch nlein purpura nephritis,HSPN)肾组织中的表达,并探讨其与HSPN病理损伤的关系。 方法35例HSPN患儿活检肾组织,光镜和电镜下观察各患儿的病理变化,按病理变化有无新月体形成、肾小球硬化、间质纤维化、血栓形成、毛细血管袢坏死各分为两组。采用real-time PCR的方法定量检测肾活检组织中miR-29b的表达水平,并记录患儿入院后首次检查的实验室指标,用SPSS17.0软件分析两组间miR-29b表达水平及实验室指标的差异,进一步联合miR-29b及实验室指标建立Logistic回归模型,分析其与HSPN新月体形成的关系。 结果(1)与无新月体组相比,有新月体组miR-29b表达水平增加(P0.05),其他病理改变组miR-29b表达水平无变化。(2)无新月体组和有新月体组的入院后实验室指标比较中,血小板计数(PLT)、中性粒细胞百分比(N%)、嗜酸性粒细胞百分比(E%)、尿白细胞计数(UWBC)、尿红细胞计数(URBC)、体重校正后24h尿蛋白定量(24hUPro/kg)、血清胆固醇(CHOL)及血IgG水平在两组间有统计学差异(P0.05)。(3)联合miR-29b与有统计学差异的实验室指标进行Logistic回归分析,结果发现miR-29b(OR=2.166,P=0.041),24hUPro/kg(OR=5.296,P=0.042),URBC(OR=6.016,P=0.033)进入Logistic回归模型(LogP=-4.633+0.773miR-29b+1.66724hUPro/kg+1.794URBC),作为预测新月体形成的独立危险因素。 结论伴新月体形成的HSPN肾组织中miR-29b表达水平增加。miR-29b、24hUPro/kg及URBC是紫癜性肾炎新月体形成的独立危险因素,提示临床医师对有上述指标异常时应警惕新月体形成可能,并给予积极治疗,以减轻肾脏损害。 第二部分MiR-29b在血管紧张素Ⅱ诱导的系膜细胞活化中的作用 目的探讨miR-29b在血管紧张素Ⅱ(AngiotensinⅡ,AngⅡ)介导的肾小球系膜细胞活化(增殖和炎症介质表达)中的作用及其机制。 方法体外培养人类肾小球系膜细胞(Human glomerular mesangial cells,HGMCs),,100nmol/L AngⅡ刺激HGMCs;或稳定转染LV-hsa-miR-29b-1载体过表达miR-29b;或稳定转染LV-hsa-miR-29b-3p-inhibition载体抑制miR-29b表达后再应用AngⅡ刺激。采用real-time PCR和western blot检测miR-29b、细胞间粘附分子-1(intracellular adhesion molecule-1,ICAM-1)、白介素-1β(interleukin-1β,IL-1β)、IL-6、IL-8、肿瘤坏死因子α诱导蛋白质3(tumor necrosisfactor, alpha-induced protein3,TNFAIP3)、NF-κB抑制因子(NF-κB repressionfactor,NKRF)、细胞周期蛋白(CyclinA2、CyclinD1)的表达;ELISA检测IL-1β、IL-8的表达;流式细胞术检测细胞周期;CCK8法检测细胞增殖。 结果(1)AngⅡ刺激后miR-29b、炎症介质ICAM-1、IL-1β、IL-6、IL-8及细胞周期蛋白CyclinA2、CyclinD1的表达显著增加,细胞周期中S+G2/M期的比例增加(P0.05)。(2)miR-29b过表达诱导炎症介质ICAM-1、IL-1β、IL-6、IL-8的释放、细胞周期蛋白CyclinA2、CyclinD1的表达增加及细胞增殖(P0.05),并且抑制靶基因TNFAIP3、NKRF的表达。(3)miR-29b表达抑制阻断AngⅡ诱导的炎症介质释放、细胞周期蛋白表达增加及细胞增殖(P0.05),并且诱导靶基因TNFAIP3、NKRF的表达增加。 结论miR-29b通过抑制靶基因TNFAIP3和NKRF的表达而促进炎症介质的释放,通过调节细胞周期蛋白而促进HGMCs增殖。
[Abstract]:Expression of MiR - 29b in renal tissue of Henoch - Schonlein purpura nephritis
Objective To investigate the expression of miR - 29b in renal tissue of Henoch Schnlein purpura nephritis ( HSPN ) and to explore its relationship with HSPN pathological injury .
Methods The expression level of miR - 29b in renal biopsy was measured by real - time PCR , and the difference between the expression level of miR - 29b and the laboratory indexes was analyzed by means of real - time PCR . The relationship between the expression level of miR - 29b and the laboratory indexes was analyzed by SPSS 17.0 software , and the relationship between the expression level of miR - 29b and the new moon body of HSPN was further analyzed .
Results ( 1 ) The expression level of miR - 29b was increased ( P0.05 ) , and the expression level of miR - 29b in other pathological changes was not changed . ( 2 ) There was statistical difference between the two groups ( P0.05 ) .
Conclusion The expression level of miR - 29b in HSPN renal tissue with new moon body is increased . miR - 29b , 24hUPro / kg and URBC are independent risk factors formed in the crescent body of Henoch - Schonlein purpura nephritis .
Role of the second part MiR - 29b in the activation of angiotensin II - induced mesangial cells
Objective To investigate the role and mechanism of miR - 29b in the activation of mesangial cells ( proliferation and inflammatory mediators ) mediated by angiotensin II ( Ang 鈪
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