移植肾慢性排斥纤维化中巨噬细胞和NO作用机制的探讨

目的：探讨移植肾慢性排斥中纤维化过程扣形成机制。方法：采用免疫化技术及图像分析技术，观察移植肾慢性斥形成过程中巨噬细胞的形态学特征及NO含量的变化。结果：移植肾慢必排斥早、中期，损害的肾小球、肾小管处巨噬细胞增多、聚集，NO表达率增加，Ⅲ、Ⅳ型胶原的表达增强；后期，已硬化的肾小班干部、肾小管处的巨噬细胞无NO表达，Ⅲ、Ⅳ型胶原的表达减弱，CD68阳性细胞计数，NO以及Ⅲ、Ⅳ型胶原的含量在移植性肾小球病型的肾小球以及肾间质硬化型的肾小管中最高。结论：移植肾慢性排斥形成过程中巨噬细胞增多且NO表达增加，可能与肾纤维化形成有关。

Role of the macrophages and NO in fibrosis formation in transplanted kidneys with chronic rejection

Objective：To confirm the effects of the macrophages and NO in the fibrosis formation of transplanted kidneys with chronic rejection. Methods：The quantitive immunohistochemistry was employed to observe the changes of relative quantitiy of macrophages, NO, collagen Ⅲ andⅣ， and to reveal the association between the increases of macrophages， NO， histopathologic damages, deposition of collagen Ⅲ and Ⅳ, finally, to infer the roles of the macrophages and NO in the fibrosis formation of transplanted kidneys with chronic rejection. Results: The macrophages accumulated and increased in the glomeruli, the tubules and the intersiticia tissue of kidneys, which was companied by the increased expression of collagen Ⅲ and Ⅳ during the early and middle stages. However, the macrophages and NO could not be detected, which was companied by the decreased deposition of collagen Ⅲ and Ⅳduring the advanced stage. There were significant differences between the 3 types(glomerulus disease type,blocking vessel type and intersticial sclerostic type) (P<0.05 or P<0.01). Conclusion：The increase of macrophages and the NO may closely interrelated with the fibrosis formation in transplanted kidneys with chronic rejection.