Figure 4: Comparative effect of different concentration of Zn2+, Mg2+, Cu2+, and Mn2+ on cell proliferation of THP-1 cells co-stimulated with peptide (10-10 M) and LPS (0.5 μg/ml) for 24 h. The results are presented as the mean ± SD of 3 independent experiments. *P <0.01 in comparison with the control group; #P<0.01 with the peptide alone group.