Figure 2.
KGF reduces TER of polarized Caco-2 cells and is detected in 18Co CM. (A) KGF (10 ng/ml), HGF (40 ng/ml), TGF-β1 (2 ng/ml), and IGF-2 (20 ng/ml) were added to polarized Caco-2 cells seven days after plating. Only KGF selectively reduced TER. Data shown are mean ± S.E. of three independent experiments. *p < 0.05, compared to TER in CTL medium. (B) CM from polarized Caco-2 cells, 18Co cells, or co-cultured Caco-2/18Co cells grown in 5% serum or serum-free culture conditions was collected and analyzed by ELISA for KGF. KGF was detected in 18Co CM and Caco-2/18Co CM, but not in Caco-2 CM. Data shown are mean ± S.E. of three independent experiments. *p < 0.001, compared to that in serum-free Caco-2 CM.