Enantiomers of 2'-fluoralkyl-6-nitroquipazine as serotonin transporter positron emission tomography imaging agents and antidepressant therapeutics
申请人:Gerdes M. John
公开号:US20080058344A1
公开(公告)日:2008-03-06
Racemic mixtures and individual enantiomers of fluorine-18 or carbon-11 radio-labelled 2′-alkyl-6-nitroquipazine ligands are serotonin transporter (SERT) tracers for positron emission tomography (PET) imaging. The non-radioactive ligand forms possess therapeutic antidepressant in vitro and in vivo pharmacological binding profiles in rodent brain and cells expressing human serotonin transporter (hSERT). Twelve 2′-alkyl-6-nitroquipazine ligands potently bind in sub-nanomolar concentrations to the pre-synaptic SERT binding site where established antidepressant drugs bind and inhibit the re-uptake of the neurotransmitter serotonin (5-HT). In vivo tracer studies in rats as well as monkey PET scan trial have demonstrated the fluorine-18 and carbon-11 positron radionuclide labeled tracers perform as quantitative tracers of specific binding the SERT protein in live brain.
2'-烷基-6-硝基奎普嗪配体的混合物和单一对映体,标记有氟-18或碳-11放射性同位素,是血清素转运体(SERT)正电子发射断层扫描(PET)成像的示踪剂。非放射性配体在啮齿动物大脑和表达人类血清素转运体(hSERT)的细胞中具有治疗性抗抑郁药物的体外和体内药理结合特性。12种2'-烷基-6-硝基奎普嗪配体在亚纳摩尔浓度下强烈结合于前突触SERT结合位点,这是已知抗抑郁药物结合并抑制神经递质血清素(5-HT)再摄取的位置。在大鼠体内示踪剂研究以及猴PET扫描试验中,氟-18和碳-11正电子放射性同位素标记的示踪剂表现为定量示踪剂,可在活体大脑中定位SERT蛋白的特异性结合。