Figure 1. Effects of C3a receptor agonists and compound 48/80 on degranulation in human mast cells.
(A) LAD2 mast cells were stimulated with different concentrations of C3a, C3 desArg, C3aP, C3a receptor superagonist E7 and scrambled E7 (E7S) for 30 min and percent degranulation (β-hexosaminidase release) was determined. (B) LAD2 cells were stimulated with different concentrations of compound 48/80 and degranulation was determined. (C) CD34+-derived human mast cells were exposed to buffer (control), C3a (100 nM), E7 or E7S (1 µM) for 30 min and percent degranulation was determined. Data are mean ± S.E.M of 3 – 4 experiments. Statistical significance was tested using two way (A) or one way (B and C) ANOVA with Bonferroni’s post test. * indicates P<0.05