Keywords: 
• Thesium chinensis Turcz /
• IgAN /
• SD rats /
• TCD therapy

Abstract: Objective To evaluate the therapeutic effects of Thesium chinensis Turcz extracts on IgA nephropathy (IgAN) rats. Methods The hot water extracted solution of Thesium chinensis Turcz flow through the AB-8 macroreticular resin column repeatedly,then being eluted with different contents of ethanol to get four part of extract.The IgAN model of SD rats were established by oral intake of bovine serum albumin(BSA,400 mg/kg) together with injection of lipopolysaccharide(LPS) and CCl₄.Beginning with 8th week,the positive group(LGT,10 mg/kg),water extract group(TT,1.0 g/kg),water soluble group(TTW,0.4 g/kg),high polarity group(TT20,0.4 g/kg) and medium polarity group(TT50,0.4 g/kg) rats were intragastric administrated drug daily,the normal group control and model control group rats were given with saline(n=8).During the next 5 weeks treatment process,the 24 h urine volume,24 h urine protein concentration,and quantity of erythrocyte in urine were observed.The levels of TP,ALP,ALT,AST,Scr and BUN in serum were determined.The expression of IgA deposition was measured by immunofluorescence staining,and the pathological changes of kidney tissue were assayed after the therapy process. Results After 5 weeks therapy,the 24 h urine protein concentration,the quantity of erythrocyte in urine,and the level of Scr and BUN of TT and TT50 groups were significantly lower than model control.The fluorescence intensities in the mesangial area were weaker than model control.Also,the degrees of renal capsule expansion and mesangial matrix proliferations,and the kidney tubules damage of TT and TT50 groups were weaker than those of model control. Conclusion The water extract and its medium polarity fraction of Thesium chinensis Turcz show good therapeutic effects on IgAN rats.