Effects of naftopidil and its derivatives on cell proliferation in HT29 cells. HT29 cells were exposed to 0.1, 1, 10, and 20 μmol/L compounds (naftopidil, TG09-1, or TG09-02) for 3 days, and then, cell viability of HT29 cells was evaluated using Cell Counting Kit-8. Values that represent the mean ± SD percentage of viable cells are shown. b
p < 0.01, c
p < 0.001 versus vehicle-treated control