S-Petasin, the Main Sesquiterpene of Petasites formosanus, Inhibits Phosphodiesterase Activity and Suppresses Ovalbumin-Induced Airway Hyperresponsiveness
Figure 8
Effects of S-petasin (a, b) and Ro 20-1724 (c, d) on cumulative OVA-induced contractions (a, c) and baseline tension (b, d) in isolated sensitized guinea pig trachealis. , , and , compared to the control (vehicle). Each value represents the mean ± SEM (n = 5–9).
