Fig. 2.
Effect of escin and diosmin on rat IVC. Rat IVC segments were treated with increasing concentrations (10−10 to 10−4 M) of escin (A) or diosmin (B) in normal Krebs (2.5 mM Ca2+), in the presence of diltiazem (10−5 M), and in Ca2+-free (2 mM EGTA) Krebs. In other experiments, IVC segments incubated in 0 Ca2+ Krebs were either nontreated (control) or treated with 10−4 M escin (C) or diosmin (D) then increasing concentrations of extracellular CaCl2 (0.1 to 2.5 mM) were added and the Ca2+ concentration-contraction curve was constructed. Data represent the means±SEM (n=4 to 9).