Fig. 6

The immune system of the tumor-bearing host is involved in the antitumoral effects of LPS pretreatment. a and b: In wild-type rats, LPS pretreatment significantly inhibited subcutaneous tumor growth. c and d: In nude rats, neither tumor growth (d) nor the final tumor weight (d) were significantly affected by LPS pretreatment. Results are presented as the mean ± SEM. **P <0.01