text: << beta(1)-Adrenoceptor >> antagonism (10 mg kg(-1) [[ bisoprolol ]]) prevented 92% (P < 0.05) of apoptosis induced by all three agonists, but clenbuterol-induced apoptosis could also be prevented by 96% (P < 0.05) by beta(2)-AR antagonism (10 mg kg(-1) ICI 118 551).