Binding of the imidazoline UK-14, 304, a putative full alpha 2-adrenoceptor agonist, to rat cerebral cortex membranes.
Binding of the imidazoline UK-14, 304, a putative full alpha 2-adrenoceptor agonist, to rat cerebral cortex membranes.
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咪唑啉 UK-14, 304(一种假定的全 α2-肾上腺素受体激动剂)与大鼠大脑皮层膜的结合。
DOI:
10.1016/0024-3205(84)90152-8
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发表时间:
1984
期刊:
影响因子:
6.1
通讯作者:
U'Prichard,DC
中科院分区:
文献类型:
--
作者:
Loftus,DJ;Stolk,JM;U'Prichard,DC
The aryl imidazoline compound UK-14, 304 (5-bromo-6-[2-imidazolin-2-yl-amino]-quinoxaline) is a potent and selective α2-adrenoceptor agonist with full intrinsic activity, unlike other imidazolines. We examined the characteristics of high specific activity (84 Ci/mmol) [3H] UK-14, 304 binding to rat cerebral cortex membranes. [3H] UK-14, 304 specific binding was enhanced by Mn2+ion, and associated and dissociated moderately rapidly at 25°C. Norepinephrine-displaceable binding was saturable and monophasic, with a KDof 1.4 nM, in agreement with rate and competition experiments, and a Bmaxof 200 fmol/mg protein. Competition studies revealed that binding was α2-adrenoceptor-specific, with yohimbine being 12 times more potent than prazosin. [3H] UK-14, 304 appeared to label predominantly the R(H) state of the brain α2-adrenoceptor, as judged by the high affinity of catecholamine and imidazoline agonists (IC50, 1–13 nM), and the relatively low affinity of yohimbine and rauwolscine (IC50, 100–300 nM), at the binding site. [3H] UK-14,304 compares favorably with other α2-adrenoceptor ligands because of its high affinity and specific activity.
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影响因子:
4.8
作者:
B. Hoffman;D. Mullikin;R. Lefkowitz
通讯作者:
R. Lefkowitz
影响因子:
4.7
作者:
B. Rouot;D. U'prichard;S. Snyder
通讯作者:
S. Snyder
影响因子:
5.4
作者:
D. Atlas;S. Sabol
通讯作者:
S. Sabol
DOI:
--
发表时间:
1983
期刊:
影响因子:
--
作者:
D. Bylund;D. U'prichard
通讯作者:
D. U'prichard
影响因子:
5
作者:
B. Perry;D. U'prichard
通讯作者:
D. U'prichard