A Kinome-Wide Selective Radiolabeled TrkB/C Inhibitor for in Vitro and in Vivo Neuroimaging: Synthesis, Preclinical Evaluation, and First-in-Human

作者：Bernard Gauthier Vadim^*; Bailey Justin J; Mossine Andrew V; Lindner Simon; Vomacka Lena; Aliaga Arturo; Shao Xia; Quesada Carole A; Sherman Phillip; Mahringer Anne; Kostikov Alexey; Grand'Maison Marilyn; Rosa Neto Pedro; Soucy Jean Paul; Thiel Alexander; Kaplan David R; Fricker Gert; Wangler Bjoern; Bartenstein Peter; Schirrmacher Ralf^*; Scott Peter J H

来源：Journal of Medicinal Chemistry, 2017, 60(16): 6897-6910.

DOI：10.1021/acs.jmedchem.7b00396

The proto-oncogenes NTRK1/2/3 encode the tropomyosin receptor kinases TrkA/B/C which play pivotal roles in neurobiology and cancer. We describe herein the discovery of [C-11]-(R)-3([C-11]-(R)-IPMICF16), a first-in-class positron emission tomography (PET) TrkB/C-targeting radiolabeled kinase inhibitor lead. Relying on extensive human kinome vetting, we show that (R)-3 is the most potent and most selective TrkB/C inhibitor characterized to date. It is demonstrated that [C-11]-(R)-3 readily crosses the bloodbrain barrier (BBB) in rodents and selectively binds to TrkB/C receptors in vivo, as evidenced by entrectinib blocking studies. Substantial TrkB/C-specific binding in human brain tissue is observed in vitro, with specific reduction in the hippocampus of Alzheimers disease (AD) versus healthy brains. We additionally provide preliminary translational data regarding the brain disposition of [C-11]-(R)-3 in primates including first-in-human assessment. These results illustrate for the first time the use of a kinome-wide selective radioactive chemical probe for endogenous kinase PET neuroimaging in human.

• 出版日期2017-8-24