Figure 1.

Effects of β-adrenoceptor agonists on mast cells. Cells were incubated without or with (A) isoprenaline or (B) indacaterol, formoterol or salmeterol for 10 min before challenge with a maximal releasing concentration of anti-IgE (1:300) for a further 25 min for histamine release. Results are expressed as the % inhibition of the control histamine release which was 30 ± 3%. Values are means ± SEM, n= 13–21.