Figure 1.

The impact of TGF-β₁, IL-4, and IL-17A on 16-HBE proliferation. The cells were cultured overnight in serum-free medium for synchronization and then stimulated with TGF-β₁ (10 ng/ml), or IL-4 (10 ng/ml), or IL-17A (10 ng/ml), or combined TGF-β₁ (10 ng/ml), IL-4(10 ng/ml) and IL-17A (10 ng/ml) for 24 h. Cells cultured with 10% FCS were served as a positive control, while cells cultured in 1% FCS medium were used as a negative control.