We studied the mechanism of down-regulation of the alpha-2A and alpha-2B adrenergic receptor subtypes transfected into the Chinese hamster ovary cell line . of age, strain, and salt intake on o^-adrenergic receptor number and affinity. One week of high upregulation of renal a2-adrenergic receptors was spe-. Understand the effects of alpha and beta receptor activation on the heart and blood alpha adrenergic receptors (alpha receptors) and beta adrenergic receptors .. like all catecholamines which activate the beta1 system, can induce rhythm. Desensitization of the beta-adrenergic receptor: distinct molecular determinants . receptor agonist: alterations in the quantity of GS alpha and Gi alpha are not. Alpha receptors have been further subdivided into alpha1 and alpha2 receptors. This combination is used because epinephrine can induce vasoconstriction. During continuous stimulation by agonist, beta 1- and beta 2-adrenergic receptors (ARs) undergo processes that lead to decreases in receptor. Upregulation of renal alpha 2-adrenergic receptors is not indicative of effects of age, strain, and salt intake on alpha 2-adrenergic receptor number and affinity. Thyrotropin upregulates alpha 1-adrenergic receptors in rat FRTL-5 thyroid cells FRTL-5 rat thyroid cells grown and maintained in a medium. An adrenergic agonist is a drug that stimulates a response from the adrenergic receptors. The five main categories of adrenergic receptors are: α1, α2, β1, β2, and β3, or phospholipase C, an agonist of the receptor will upregulate the effects on the downstream pathway (it Adrenergic receptor · Alpha adrenergic agonist. The available data indicate that the beta-adrenergic receptors that heart failure, myocardial alpha 1-adrenergic receptors and histamine H2.