Metal Protein-Attenuating Compound for PET Neuroimaging: Synthesis and Preclinical Evaluation of [<sup>11</sup>C]PBT2
作者:Hema S. Krishnan、Vadim Bernard-Gauthier、Michael S. Placzek、Kenneth Dahl、Vidya Narayanaswami、Elijahu Livni、Zhen Chen、Jing Yang、Thomas L. Collier、Chongzhao Ran、Jacob M. Hooker、Steven H. Liang、Neil Vasdev
DOI:10.1021/acs.molpharmaceut.7b00936
日期:2018.2.5
second generation metal protein-attenuating compound that has recently advanced in Phase II clinical trials for the treatment of AD and HD based on promising preclinical efficacy data. Herein, we report the first radiosynthesis and preclinical positron emission tomography (PET) neuroimaging evaluation of [11C]PBT2 in rodents and nonhuman primates. Carbon-11 labeled PBT2 was synthesized in 4.8 ± 0.5% (nondecay
异位稳态或金属离子(例如铜,锌和铁)的异常蓄积与多种神经退行性疾病的发病机理有关,包括阿尔茨海默氏病(AD)和亨廷顿氏病(HD)。5,7-二氯-2-((二甲氨基)甲基)喹啉-8-醇PBT2是第二代金属蛋白减毒化合物,基于有前途的治疗方法,最近已在II期临床试验中用于AD和HD的治疗临床前疗效数据。在此,我们报道了啮齿动物和非人类灵长类动物中[ 11 C] PBT2的首次放射合成和临床前正电子发射断层扫描(PET)神经成像评估。碳11标记的PBT2在合成结束时以[ 11 C] CH 3为基础,以4.8±0.5%(未经衰减校正)的放射化学产率(RCY)合成I(n = 6),具有高于99%的放射化学纯度和80-90 GBq /μmol的摩尔活性(A m),来自相应的甲基前体。在非人类的灵长类动物大脑中,在所有皮层和皮层下灰质区域(丘脑>尾状>皮层)白质)注射后2.5-4.5分钟内,[ 11 C]