免疫抑制剂对Fractalkine及CX3CR1在慢性移植肾肾病中表达影响的研究
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摘要
目的了解不同免疫抑制剂对Fractalkine及其受体CX3CR1在慢性移植肾肾病(Chronic allograft nephropathy,CAN)中表达的影响及其临床意义。
     方法1.建立SD→Wistar大鼠强化缺血再灌注损伤CAN加快模型。实验分为6组:假手术组、对照组(CsA 10mg·kg~(-1)·d~(-1)×10d)、CsA组(6mg·kg~(-1)·d~(-1))、FK506组(0.15mg·kg~(-1)·d~(-1))、MMF组(20mg·kg~(-1)·d~(-10)、RAPA组(0.8 mg·kg~(-1)·d~(-1)),每组各时间点动物均为8只。分别于术后4w、8w及12w时处死实验动物。除假手术组外,其它各组动物均于肾移植后当天即开始使用CsA10mg·kg~(-1)·d~(-1)×10d,以避免急性排异反应,10d后各实验组使用相应的免疫抑制剂进行干预处理。2.采用免疫组织化学和实时荧光定量PCR法检测Fractalkine及CX3CR1的蛋白和mRNA在移植肾中的定位及其表达情况。
     结果 免疫组织化学结果显示,Fractalkine、CX3CR1主要表达于肾小管上皮细胞的胞膜和肾小管间质,部分见于间质血管,偶见于肾小球壁层细胞。术后4w、8w及12w的移植肾标本中,对照组Fractalkine、CX3CR1的mRNA和蛋白表达均高于假手术组,差异有显著性。CsA组和FK506
Objective Some recent studies have suggested that Fractalkine/CX3CR1 system may contribute to the pathogenesis of vascular and tissue injury in chronic allograft nephropathy (CAN). It is still unknown of the influence of different immunosuppresants on expression of Fractalkine/CX3CR1 in CAN. This study is to investigate what role Fractalkine/CX3CR1 play in CAN and whether there are different effects among different immunosuppresants on expression of Fractalkine/CX3CR1 in CAN.
    Methods The SD→Wistar rat accelerated kidney sclerosis model was performed following the procedure of Kamada with our modification. Before the transplantation, the kidney was preserved one hour in 0-4℃ heparin sodium chloride solution for reinforcement of the injury of cold ischemia. The recipient rats were divided into 6 groups (each group n=8). Group A: pseudo-operation group; Group B (control group ): CsA 10mg·kg~(-1)·d~(-1)×10d, followed by vehicle; Group C: CsA emg·kg~(-1)·d~(-1); Group D:FK506 0.15 mg·kg~(-1)·d~(-1) Group E: MMF 20 mg·kg~(-1)·d~(-1) Group F: RAPA 0.8mh·kg~(-1)·d~(-1)
引文
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