The expression level of AQP3 in SGC7901 in real-time PCR and Western blot studies. AQP3 mRNA and protein were expressed in SGC7901 cells. After RNAi, both AQP3 mRNA and protein expression decreased significantly. After transfection of lentivector encoding AQP3, both AQP3 mRNA and protein expression levels were increased obviously. The expression levels of different cells were further normalized to that of BLANK group, making the relative expression level of BLANK group as 100%.