Table 1

Survival percentage of mice after tumor rechallenge

Mice with regression of established tumor (either CT26 or Renca) after naked and liposome mIL-12 cDNA treatments were rechallenged at 50–80 days after initial tumor placement. Rechallenge was with 1 × 106 Renca or CT26 tumor cells. Survival was assessed.

First Tumor, Second ChallengeCT26 Regression No. Alive/TotalRenca Regression No. Alive/Total
CT2623 /24 (96%)0 /8 (0%)
Renca5 /22 (23%)9 /9 (100%)