Circulation, Vol 67, 610-613, Copyright © 1983 by American Heart Association
Hypertension reduces the number of beta-adrenergic receptors in rat brain microvessels
MS Magnoni, H Kobayashi, A Cazzaniga, F Izumi, PF Spano and M Trabucchi
Beta-adrenergic receptor function was measured in cerebral microvessels of
spontaneously and DOCA-salt hypertensive rats using 125I-
iodohydroxybenzylpindolol (IHYP). Both in genetic and in experimental
hypertension, a significant decrease in the number of beta-receptor sites
was observed, without receptor affinity changes. These results suggest that
alterations of central adrenergic regulation of small vessels may
participate in the pathogenetic mechanisms leading to the development of
the central hypertensive disease.