CASP3 and infection: Furthermore, the expression of caspases was compared in HeLa and HepG2 after Salmonella WT JOL 401 and mutant JOL 912 and 1800 infection, which revealed caspase 3 and 7 expression and showed a reducing pattern in JOL 912- and JOL1800-treated cells, compared to the WT strain (Figure 8A).