[Hormonal regulation of heparin secretion by rat mast cells during stress].

Administration of non-selective beta-blocker propranolol prevented the stress-activated action whereas the alpha-agonist isoprenaline enhanced the effect of immobilisation stress on the rat mast cells. beta-antagonists or agonists exerted no effect on the heparine secretion by the mast cells. ACTH activated the secretion in the absence of stress.