Abstract:
:A 20 h continuous treatment of rats with catecholamines, using subcutaneously implantable retard tablets, had either no (adrenaline, isoproterenol, midodrine) or a slight (noradrenaline) suppressive effect on the in vitro responsiveness of peripheral blood T-lymphocytes. A marked suppression of the mitogen response ensued when adrenaline, noradrenaline or midodrine, but not isoproterenol, was applied together with the beta-receptor blocker propranolol, whereas the combination with the alpha-receptor blocker phentolamine had no effect. The mitogen response of splenic lymphocytes was not affected by any of these treatments. This alpha-mediated adrenergic suppression of peripheral blood T-cells was not correlated with general metabolic alterations, shifts in white blood cell counts or CD4+/CD8+ subsets, or with elevated glucocorticoid levels. The data suggest that to consistently influence the reactivity of rat peripheral blood lymphocytes by chronic adrenergic stimuli in vivo requires both high catecholamine levels and a bias towards alpha-adrenergic receptivity.
journal_name
J Neuroimmunoljournal_title
Journal of neuroimmunologyauthors
Felsner P,Hofer D,Rinner I,Mangge H,Gruber M,Korsatko W,Schauenstein Kdoi
10.1016/0165-5728(92)90154-dsubject
Has Abstractpub_date
1992-03-01 00:00:00pages
47-57issue
1-2eissn
0165-5728issn
1872-8421pii
0165-5728(92)90154-Djournal_volume
37pub_type
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