Fig. 1

Proliferation of 16HBE cells in the presence or absence of chemical compounds. 16HBE cells were pre-cultured for 24 h, then treated with vehicle or indicated concentrations of chemical compounds for further 72 h. After that, cells were subjected to CCK8 proliferation assays. The data were expressed as means ± SD, n = 6. *p < 0.05, **p < 0.01 versus vehicle treatments (0 μM)