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Discovery of a Highly Selective Glycogen Synthase Kinase‐3 Inhibitor (PF‐04802367) That Modulates Tau Phosphorylation in the Brain: Translation for PET Neuroimaging

Journal Article · · Angewandte Chemie (International Edition)
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  1. Gordon Center for Medical Imaging &, Nuclear Medicine and Molecular Imaging Massachusetts General Hospital &, Department of Radiology Harvard Medical School Boston MA 02114 USA
  2. Pfizer Worldwide Research and Development, Groton Laboratories Eastern Point Road Groton CT 06340 USA
  3. Pfizer Worldwide Research and Development 610 Main Street Cambridge MA 02139 USA
  4. Departments of Neurology &, Psychiatry Massachusetts General Hospital Harvard Medical School 185 Cambridge Street Boston MA 02114 USA
  5. Stanley Center for Psychiatric Research Broad Institute 415 Main Street Cambridge MA o2142 USA
  6. Stanley Center for Psychiatric Research Broad Institute 415 Main Street Cambridge MA o2142 USA, Departments of Neurology &, Psychiatry Massachusetts General Hospital Harvard Medical School 185 Cambridge Street Boston MA 02114 USA

Abstract

Glycogen synthase kinase‐3 (GSK‐3) regulates multiple cellular processes in diabetes, oncology, and neurology. N ‐(3‐(1H‐1,2,4‐triazol‐1‐yl)propyl)‐5‐(3‐chloro‐4‐methoxyphenyl)oxazole‐4‐carboxamide (PF‐04802367 or PF‐367) has been identified as a highly potent inhibitor, which is among the most selective antagonists of GSK‐3 to date. Its efficacy was demonstrated in modulation of tau phosphorylation in vitro and in vivo. Whereas the kinetics of PF‐367 binding in brain tissues are too fast for an effective therapeutic agent, the pharmacokinetic profile of PF‐367 is ideal for discovery of radiopharmaceuticals for GSK‐3 in the central nervous system. A 11 C‐isotopologue of PF‐367 was synthesized and preliminary PET imaging studies in non‐human primates confirmed that we have overcome the two major obstacles for imaging GSK‐3, namely, reasonable brain permeability and displaceable binding.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1400568
Alternate ID(s):
OSTI ID: 1854169
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 33 Vol. 55; ISSN 1433-7851
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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