The Journal of pharmacy and pharmacology, 61(7), 901-910 (2009-07-11)
alpha(2)-Adrenergic and mu-opioid receptors belong to the rhodopsin family of G-protein coupled receptors and mediate antinociceptive effects via similar signal transduction pathways. Previous studies have revealed direct functional interactions between both receptor systems including synergistic and additive effects. To evaluate
One subtype of imidazoline receptors (IR1) is similar to alpha 2-adrenoceptors (alpha 2 AR) based on their high affinity for clonidine and related imidazoline compounds. On the other hand, IR1 possess low affinity for norepinephrine (NE) and other catecholamines. Imidazoline
The binding properties of p-[125I]iodoclonidine [( 125I]PIC) to human platelet membranes and the functional characteristics of PIC are reported. [125I]PIC bound rapidly and reversibly to platelet membranes, with a first-order association rate constant (kon) at room temperature of 8.0 +/-
The Journal of pharmacology and experimental therapeutics, 267(3), 1493-1502 (1993-12-01)
Human platelets are shown to possess at least two high-affinity, imidazol(in)e-preferring binding sites that are pharmacologically distinct from alpha-2 adrenoceptors. These nonadrenergic sites were radiolabeled even in the presence of a 10 microM norepinephrine mask of alpha-2 adrenoceptors. Heterogeneity at
This study sought to identify and characterize subtypes of alpha 2-adrenoceptors in rabbit ciliary body. Radioligand binding assays were performed with the alpha 2-agonist ligand [125I]-p-iodoclonidine ([125I]PIC) and the antagonist ligand [3H]rauwolscine. Both [125I]PIC and [3H]rauwolscine bound to a single
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