同种异体小鼠肾移植慢性抗体介导排斥反应模型的构建与鉴定
DOI:
作者:
作者单位:

南京医科大学

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Construction and identification of an chronic antibody-mediated rejection model of renal graft in mice
Author:
Affiliation:

Nanjing Medical University

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    目的:构建并鉴定同种异体小鼠肾移植慢性抗体介导排斥反应模型。方法:采用雄性6-8周龄BALB/cH2d与C57BL/6H2b小鼠,随机分为以下组别:①同基因对照组(Syngeneic 14 Days, SYN14D):未行预致敏,行C57BL/6H2b→C57BL/6H2b肾移植,14d(14 days,14d)后取移植肾;②细胞介导的排斥反应组(T cellular-mediated rejection 14 Days,TCMR14D):未行预致敏,行BALB/cH2d→C57BL/6H2b肾移植,14d后取移植肾;③急性抗体介导排斥反应组(acute antibody-mediated rejection,back skin transplantation 5 days + kidney transplantation 5 days,aABMR,BST5D+KT5D):将供体BALB/cH2d背部皮肤移植到受体C57BL/6H2b背部,5d(5 days, 5d)后行BALB/cH2d→C57BL/6H2b肾移植,5d后取移植肾;④慢性抗体介导排斥反应组1(chronic antibody-mediated rejection1,tail skin transplantation 2 days + kidney transplantation 14 days,cABMR1, TST2D+KT14D):将供体BALB/cH2d尾部皮肤移植到受体C57BL/6H2b背部,2d(2 days,2d)后行BALB/cH2d→C57BL/6H2b肾移植,14d后取移植肾;⑤cABMR组2(chronic antibody-mediated rejection2,tail skin transplantation 3 days + kidney transplantation 14 days, cABMR2, TST3D+KT14D):将供体BALB/cH2d尾部皮肤移植到受体C57BL/6H2b背部,3d(3 days,3d)后行BALB/cH2d→C57BL/6H2b肾移植,14d后取移植肾;⑥cABMR组3(chronic antibody-mediated rejection3,tail skin transplantation 4 days + kidney transplantation 14 days, cABMR3, TST4D+KT14D):将供体BALB/cH2d尾部皮肤移植到受体C57BL/6H2b背部,4d(4 days,4d)后行BALB/cH2d→C57BL/6H2b肾移植,14d后取移植肾。移植肾行病理染色及Banff评分诊断,绘制生存曲线,检测移植肾组织中补体片段C3d沉积、外周血IgG类供体特异性抗体(donor specific antibody,DSA)、血清肌酐(creatinine,Cr)、血清尿素氮(blood urea nitrogen,BUN)水平,检测移植肾组织中CD3+T细胞、CD19+B细胞、F4/80标记的巨噬细胞、Ly6G标记的髓系细胞表达情况。结果:cABMR组1模型符合抗体介导排斥反应(antibody-mediated rejection,ABMR)诊断标准,术后存活率为80%,CD3+T细胞表达不明显,故选用cABMR组1作为cABMR模型进行后续论证。与SYN14D相比,cABMR的C3d表达阳性区域显著增多,外周血IgG类DSA平均荧光强度明显增强,外周血血清Cr与BUN水平明显升高。与aABMR相比,cABMR移植肾管周毛细血管出血、扩张,肾小球内可见单个核细胞浸润,肾小管内出现更典型的小管损伤及刷状缘脱落,Banff评分更高,C3d表达阳性区域显著增多,外周血IgG类DSA平均荧光强度显著增强,外周血血清Cr与BUN水平明显升高。与aABMR相比,cABMR肾间质和管周毛细血管CD19+B细胞、CD3+T细胞浸润均不显著,肾间质F4/80标记的巨噬细胞、Ly6G标记的髓系细胞浸润均更显著,Foxp3与IL-10的表达在cABMR模型中显著减少,IL-1β,IL-6,TNF-α,CCL2炎症细胞因子的浸润在cABMR模型中显著增多。结论:本研究成功构建并鉴定一种生存周期得到延长的cABMR模型,可在此模型的基础上评估cABMR的发生机制及干预措施,具有较高的临床应用价值。

    Abstract:

    Objective: Construction and identification of an chronic antibody-mediated rejection model of renal graft in mice. Methods: Male 6-8 weeks old BALB/cH2d and C57BL/6H2b mice were used as experimental mice and randomly divided into following groups:①The syngeneic control group (SYN14D): no skin transplantation was performed,only C57BL/6H2b to C57BL/6H2b kidney transplantation was conducted,the transplanted kidney was removed 14 days later; ②T cellular-mediated rejection group (TCMR14D): no skin transplantation was performed,only BALB/cH2d to C57BL/6H2b kidney transplantation was conducted,the transplanted kidney was removed 14 days later; ③acute antibody-mediated rejection group (aABMR,BST5D+KT5D): full-thickness back skin transplantation was performed on C57BL/6 mice for 5 days (BALB/CH2d→C57BL/6H2b),followed by BALB/cH2d to C57BL/6H2b kidney transplantation,the transplanted kidney was removed 5 days later; ④chronic antibody-mediated rejection group 1 (cABMR,TST2D+KT14D): tail skin transplantation was performed on C57BL/6 mice for 2 days(BALB/CH2d→C57BL/6H2b), followed by BALB/cH2d to C57BL/6H2b kidney transplantation, the transplanted kidney was removed 14 days later; ⑤cABMR group 2 (TST3D+KT14D): tail skin transplantation was performed on C57BL/6 mice for 3 days(BALB/CH2d→C57BL/6H2b), followed by BALB/cH2d to C57BL/6H2b kidney transplantation, the transplanted kidney was removed 14 days later; ⑥cABMR group 3 (TST4D+KT14D): tail skin transplantation was performed on C57BL/6 mice for 4 days(BALB/CH2d→C57BL/6H2b), followed by BALB/cH2d to C57BL/6H2b kidney transplantation, the transplanted kidney was removed 14 days later. Pathological staining and Banff score were performed to diagnose the transplanted kidneys,survival curves were plotted,the levels of complement fragment C3d deposition,peripheral blood IgG class donor-specific antibody (DSA),serum creatinine (Cr) and serum urea nitrogen (BUN) were detected in transplanted kidney tissues,the expression of CD3+T cells,CD19+B cells,F4/80 labelled macrophages,Ly6G labelled myeloid cells was detected. Results: The pathological injury of cABMR group 1 met the diagnostic criteria of ABMR,the postoperative survival rate was 80%,the expression of CD3+T cells was not obvious,so cABMR group 1 was subsequently selected as the model of cABMR for experimental demonstration. Compared with SYN14D,the C3d expression of cABMR was significantly enhanced,the average fluorescence intensity of peripheral blood IgG class DSA was significantly higher,peripheral blood serum Cr and BUN levels were significantly higher. Compared with aABMR,cABMR model of transplanted kidneys showed peritubular capillary haemorrhage and dilatation,single nucleus infiltration seen in the glomeruli,more typical tubular damage and brush border detachment in the tubules, higher Banff scores,significantly more positive areas of C3d expression,significantly higher mean fluorescence intensity of peripheral blood IgG class DSA,significantly higher peripheral blood serum Cr and BUN levels. Compared with aABMR,cABMR group renal interstitial and peritubular capillary CD19+B cells and CD3+T cells infiltration were not significant,renal interstitial F4/80 labelled macrophage and Ly6G labelled myeloid cell infiltration were more significant. Foxp3 and IL-10 expression was significantly reduced in cABMR model, infiltration of IL-1β,IL-6,TNF-α and CCL2 inflammatory cytokines was significantly increased in cABMR model. Conclusion: Our group constructed a cABMR model in which the survival cycle was prolonged,on the basis of which the effects of drug interventions on the prognosis of ABMR patients can be evaluated,which has high clinical application value.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2025-01-23
  • 最后修改日期:2025-03-29
  • 录用日期:2025-07-11
  • 在线发布日期:
  • 出版日期:
关闭