Influence of acid and bile acid on ERK activity, PPARγ expression and cell proliferation in normal human esophageal epithelial cells

Figure 1 A phase-contrast micrograph of normal human esopha-geal epithelial cells (×250).

Figure 2 Effect of acid exposure on cell proliferation.

Figure 3 Effect of bile acid exposure on cell proliferation.

Figure 4 Changes in proliferation of cells exposed to bile acid with different pH for 3 min.

Figure 5 Effect of acid exposure (3 min) on ERK.

Figure 6 Expression of ERK in 30 min after acid exposure (pH 4. 0, 3 min).

Figure 7 Effect of bile acid exposure (3 min) on ERK.