Table 4: Expression level of IL-2 protein in tissues of mice (mean ± SD).

GroupsSerum (ng/mL)Liver (ng/g)Spleen (ng/g)Kidney (ng/g)Lung (ng/g)Intestine (ng/g)Tumor (ng/g)

TPI19.17 ± 10.6*17.89 ± 1.0*57.22 ± 6.19*15.17 ± 1.41*16.31 ± 1.46*15.32 ± 1.56*36.72 ± 7.55*
TP8.48 ± 0.34*8.78 ± 0.36**10.34 ± 0.64*7.89 ± 0.45**7.50 ± 0.44**7.38 ± 0.43**9.30 ± 0.51**
Normal2.06 ± 0.102.56 ± 0.123.12 ± 0.211.97 ± 0.101.69 ± 0.102.08 ± 0.113.37 ± 0.13

* , TPI versus TP and Normal group; ** , TP versus Normal group.
TP: attenuated S. typhimurium with the eukaryotic expression vector; TPI: attenuated S. typhimurium with the eukaryotic expression plasmid carrying IL-2 gene.