Fig. 6.

Serum corticosterone levels in mice treated by PDT vaccine. Mice bearing SCCVII tumors were treated with either PDT vaccine or control vaccine as described for Fig. 1. Their blood was collected at indicated post-vaccination time intervals for the ELISA-based determination of serum corticosterone. Each treatment group consisted of 4 mice; bars represent standard deviations. *Statistically significant difference in response (P < 0.05) compared to the unvaccinated control group; **statistically significant difference in response (P < 0.05) compared to PDT vaccine alone group