ARC 239 is a potent α-adrenoceptor blocking drug, competitively antagonizing pressor responses to adrenaline and inhibiting pressor responses to noradrenaline, phenylephrine, tyramine, and dimethylphenylpiperazinium.
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ARC 239 is a selective α-2B adrenergic blocker.
ARC 239 is a selective α-2B adrenergic blocker. Although ARC-239, like prazosin, also has some alpha-1 antagonist activity, it is used most commomly to differentiate alpha-2A/D from alpha-2B and alpha-2C subtypes rather than for any alpha-1 inhibition..
The effects of several alpha 2-adrenoceptor agonists and antagonists were examined on the cholinergic twitch contractions evoked by electrical field stimulation of guinea-pig duodenum. Oxymetazoline, xylazine, noradrenaline, alpha-methyl-noradrenaline or medetomidine (0.01-30 microM) were nearly equieffective in inhibiting duodenal twitch responses.
Journal of cardiovascular pharmacology, 2(2), 175-191 (1980-01-01)
In pentobarbital-treated dogs and rats, AR-C239, a new and potent alpha-adrenoceptor blocking drug, competitively antagonized pressor responses to adrenaline and inhibited pressor responses to noradrenaline, phenylephrine, tyramine, and dimethylphenylpiperazinium. Injected intravenously into closed-chest dogs, AR-C239 (3-50 micrograms/kg) induced a progressive
British journal of pharmacology, 120(5), 892-898 (1997-03-01)
1. The influence of the sympathetic nervous system on intestinal fluid transport by the jejunum and ileum of the anaesthetized rat was investigated under basal conditions and during active secretion induced by intra-arterial infusion of vasoactive intestinal peptide (VIP). 2.
The Journal of physiology, 508 ( Pt 1), 57-66 (1998-06-06)
1. The noradrenaline (NA)-activated response was investigated in neurones acutely dissociated from the rat locus coeruleus (LC) using nystatin-perforated, conventional whole-cell and inside-out patch recording modes under current- and voltage-clamp conditions. 2. Under current-clamp conditions, NA hyperpolarized the LC neurones
Exogenous pyrogens, e.g., bacterial lipopolysaccharides (LPS), are thought to stimulate macrophages to release endogenous pyrogens, e.g., TNF alpha, IL-1 beta, and IL-6, which act in the hypothalamus to produce fever. We studied the effect of different alpha 1- and alpha
Learn about alpha-2 adrenoceptor and its subtypes, mediated responses, and applications of agonists. Included is a list of available products and a comparison table.
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