A. HT-29 cells seeded in 96-well plates were allowed to grow for 48 hours in media containing 10% FBS. The growth medium then was removed and the cells were exposed to the indicated concentrations of cPAF in media containing 0.1% FBS. After 72 hours at 37°C, we assessed cellular proliferation using the XTT assay, as described in Materials and Methods. *, p<0.05; **, p<0.005.
B. HT-29 cells seeded in 96-well plates were allowed to grow for 24 hours in media containing 10% FBS. The growth medium then was removed and the cells were exposed to the indicated concentrations of cPAF and BN-52021 in serum-free medium. Fresh media containing cPAF and BN-52021 were supplied every 24 hours. After a total of 72 hours at 37°C, we assessed cellular proliferation using the XTT assay. *, p<0.05.