Synthesis and pharmacological evaluation of fluorine-containing D₃ dopamine receptor ligands.

Synthesis and pharmacological evaluation of fluorine-containing D₃ dopamine receptor ligands.
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DOI:
10.1021/jm101323b
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发表时间:
2011-03-24
影响因子:
7.3
通讯作者:
Mach RH
Mach RH
中科院分区:
医学1区
文献类型:
--
作者:
Tu Z;Li S;Cui J;Xu J;Taylor M;Ho D;Luedtke RR;Mach RH

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A series of fluorine containing N-(2-methoxyphenyl)piperazine and N-(2-fluoroethoxy)piperazine analogues were synthesized and their affinities for human dopamine D2, D3 and D4 receptors were determined. Radioligand binding studies identified five compounds, 18a, 20a, 20c, 20e and 21e, which bind with high affinity at D3 (Ki = 0.17 to 5 nM) and moderate to high selectivity for D3 vs. D2 receptors (ranging from ∼25 to 163-fold). These compounds were also evaluated for intrinsic activity at D2 and D3 receptors using a forskolin-dependent adenylyl cyclase assay. This panel of compounds exhibits varying receptor subtype binding selectivity and intrinsic activity at D2 vs. D3 receptors. These compounds may be useful for behavioral pharmacology studies on the role of D2-like dopamine receptors in neuropsychiatric and neurological disorders. Furthermore, compound 20e, which has the highest binding affinity and selectivity for the D3 receptor (Ki = 0.17 nM for D3, 163-fold selectivity for D3 vs. D2 receptors) represents a candidate fluorine-18 radiotracer for in vivo PET imaging studies on the regulation of D3 receptor expression.
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