Effects of JP and Gem on AsPC-1 cell proliferation in vitro. AsPC-1 cells were plated on a 96-well plate and were treated with PBS (Control, C), JP or Gem, either alone or in combination. After 72 hours incubation, 10 μl WST-1 reagent was added in each well and incubated for additional 2 hours. The resulting number of viable cells was calculated by measuring absorbance of color produced in each well. Data are representative of mean values ± SD of triplicate determinants. Symbol * represents P values of less than 0.0004.