Synthesis, structure activity relationship, radiolabeling and preclinical evaluation of high affinity ligands for the ion channel of the N-methyl-d-aspartate receptor as potential imaging probes for positron emission tomography
作者:Pieter J. Klein、Johannes A.M. Christiaans、Athanasios Metaxas、Robert C. Schuit、Adriaan A. Lammertsma、Bart N.M. van Berckel、Albert D. Windhorst
DOI:10.1016/j.bmc.2014.12.029
日期:2015.3
The N-methyl-d-aspartate receptor (NMDAr) is involved in many neurological and psychiatric disorders including Alzheimer’s disease and schizophrenia. Currently, it is not possible to assess NMDAr availability in vivo. The purpose of this study was to develop a positron emission tomography (PET) ligand for the NMDAr ion channel. A series of di- and tri-N-substituted diarylguanidines was synthesized
所述Ñ甲基d天冬氨酸受体(NMDAR)参与许多神经障碍和精神障碍,包括阿尔茨海默氏病和精神分裂症。目前,尚无法评估体内NMDAr的可用性。这项研究的目的是为NMDAr离子通道开发正电子发射断层扫描(PET)配体。合成了一系列二-和三-N-取代的二芳基胍。此外,评估了大鼠前脑膜部分中NMDAr离子通道的体外结合亲和力。化合物10,11和32与任一碳-11或氟-18放射性标记物。配体[ 11 C] 10和[ 18F] 32在B6C3小鼠中进行了离体评估。生物分布研究表明,与小脑相比,前脑区域对[ 11 C] 10和[ 18 F] 32的吸收更高。另外,对于[ 11 C] 10 54%和[ 18 F] 32,在60分钟时大脑中70%的活动归因于完整的示踪剂。用MK-801(0.6 mg·kg -1,ip)进行的预处理稍微降低了NMDAr特定区域对[ 18 F] 32的吸收,但没有降低[ 11 C]