Figure 3. RA promotes cell apoptosis of both Hela and c-33A cells. Flow cytometry and was conducted for determination the apoptosis of (A) Hela and (B) c-33A cells. (C) The expression of apoptosis-related proteins in both Hela and c-33A cells was assess using western blot analysis. *P<0.01, *P<0.001 vs. control; #P<0.05, #P<0.01, #P<0.001 vs. RA (24 h).