| 
      
        |  | Before    the treatment | after    the first infusion | after    the second infusion |  
        | Urinary protein | 4+ | 2+ | 1+ |  
        | 24-hr urinary protein (g/L) | 1.71 | 0.68 | 0.32 |  
        | urinary NAG enzyme(u/g•cr) | 25.1 | 17.2 | 13.4 |  
        | urinary retinol binding    protein (mg/L) | 0.31 | 0.29 | 0.32 |  
        | urinary C3 (ng/L) | 2.71 | 2.75 | 2.8 |  
        | urinary α2-M (ng/L) | 2.95 | 2.78 | 2.96 |  |