The role of M2-type macrophages in interstitial fibrosis of kidney allograft / 中华器官移植杂志

ABSTRACT

Objective To investigate the role of M2-type macrophages in interstitial fibrosis of kidney allograft.Methods The degree of interstitial fibrosis in renal biopsy tissues was assessed by Masson staining.By immunohistochemical double staining method and image analysis system,the levels of CD163 and SMA expression were detected in the renal biopsy tissues of 30 cases of CAI and 10 cases of normal kidney.The soluble CD163 was determined in urine by double antibody sandwich enzyme-linked immunosorbent assay.Results There were statistically significant differences in the expression of CD163 and SMA between kidney allograft and normal kidney tissue (P＜0.05).With the increase in renal fibrosis severity,the levels of serum Cr,BUN and the expression of CD163 and SMA were increased (P＜0.05).There was a positive correlation between the CD163 expression and the levels of serum Cr (r =0.937,P =0.000),and between the expression of CD63 and the level of sCD163 in urine.Conclusion The abnormal high expression of M2 macrophages in chronic renal allograft injury was associated with the degree of interstitial fibrosis and renal insufficiency in patients.