Figure 3. Levels of SOD, GSH-Px and IL-2 in serum of MFC-inoculating mice. (A) Activities of serum SOD in tumor-bearing mice. (B) Activities of serum GSH-Px in tumor-bearing mice. (C) Concentrations of serum IL-2 in tumor-bearing mice. Values are presented as mean ± SD of 12 mice in relevant groups. Data were compared with the negative control and were analyzed using the Student's t-test. Significant differences from the negative control are indicated by *p