Abstract:
: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 [11C]-(R)-3 ([11C]-(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 [11C]-(R)-3 readily crosses the blood-brain 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 Alzheimer's disease (AD) versus healthy brains. We additionally provide preliminary translational data regarding the brain disposition of [11C]-(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.
journal_name
J Med Chemjournal_title
Journal of medicinal chemistryauthors
Bernard-Gauthier V,Bailey JJ,Mossine AV,Lindner S,Vomacka L,Aliaga A,Shao X,Quesada CA,Sherman P,Mahringer A,Kostikov A,Grand'Maison M,Rosa-Neto P,Soucy JP,Thiel A,Kaplan DR,Fricker G,Wängler B,Bartenstein P,Schirrmdoi
10.1021/acs.jmedchem.7b00396subject
Has Abstractpub_date
2017-08-24 00:00:00pages
6897-6910issue
16eissn
0022-2623issn
1520-4804journal_volume
60pub_type
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