ABSTRACT
Objective:To observe the theraputic effect and changes of glomerular extracellular matrix components(ECM) and PAI-1 and their relationships after cure with methyl-prednisone on immune complexes nephritis rats.Methods:Immune complexes nephritis rats model were induced with C-BSA.Levels of FN,LN in different treatment groups were analyzed by ELISA, level of PAI-1 in rats renal tissue was determined by color developing substrate,was theraputic effect of methyl-prednisone with 24 hours volumes of urine protein.Results:The levels of PAI-1,FN and LN of model groups were significantly higher than those of normal and control groups,and PAI-1 was significantly correlated with LN and FN,Glomerular mesangial matrix proliferated slightly and moderately;The levels of FN,LN and PAI-1 decreased signifcantly and glomerular mesangial matrix proliferation lessen differently after cure of methyl-prednisone for 1 and 2 weeks,but not reaching the level of normal groups;24 hours volumes of urine protein decrease significantly in treatment groups.Conclusion:The ECM accumulation correlate with PAI-1 increase in immune complexes rats,methyl-prednisone may affect ECM accumulation by interfering with PA/PAI-1 system to reach a treatment purpose.