Insulin selectively downregulates alpha2-adrenoceptors in the arcuate and dorsomedial nucleus.

Autor: Levin BE; Neurology Service (127 C), DVA Medical Center, E. Orange, NJ 07018, USA., Israel P, Lattemann DP
Jazyk: angličtina
Zdroj: Brain research bulletin [Brain Res Bull] 1998; Vol. 45 (2), pp. 179-81.
DOI: 10.1016/s0361-9230(97)00336-5
Abstrakt: Intracerebroventricular infusion of insulin (2 mU/ day) produced selective downregulation of 3H-paraminoclonidine binding to alpha2-adrenoceptors in the hypothalamic arcuate (14%) and dorsomedial (19%) nuclei out of 16 forebrain areas in Wistar rats. Binding of 3H-prazosin to alpha1-adrenoceptors was unaffected. This is in keeping with the known effect of insulin on catecholamine and neuropeptide Y metabolism in these brain regions that play an important role in energy homeostasis.
Databáze: MEDLINE