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J Med Chem. 2016 May 26;59(10):4778-89. doi: 10.1021/acs.jmedchem.6b00166. Epub 2016 May 5.

Discovery of 6-(Fluoro-(18)F)-3-(1H-pyrrolo[2,3-c]pyridin-1-yl)isoquinolin-5-amine ([(18)F]-MK-6240): A Positron Emission Tomography (PET) Imaging Agent for Quantification of Neurofibrillary Tangles (NFTs).

Author information

1
Discovery Chemistry, Merck & Co., Inc. , West Point Pennsylvania 19486, United States.
2
Imaging, Merck & Co., Inc. , West Point Pennsylvania 19486, United States.
3
Process Chemistry, Merck & Co., Inc. , West Point Pennsylvania 19486, United States.
4
Pharmacology, Merck & Co., Inc. , West Point Pennsylvania 19486, United States.
5
Pharmacology, Merck & Co., Inc. , Kenilworth, New Jersey 07033, United States.
6
Drug Metabolism, Merck & Co., Inc. , West Point, Pennsylvania 19486, United States.
7
Discovery Pharmaceutical Sciences, Merck & Co., Inc. , West Point, Pennsylvania 19486, United States.
8
Neuroscience, Merck & Co., Inc. , West Point, Pennsylvania 19486, United States.
9
Labelled Compound Synthesis, Merck & Co., Inc. , Rahway, New Jersey, 07065, United States.
10
Clinical Pharmacology, Merck & Co., Inc. , West Point, Pennsylvania 19486, United States.
11
Computational Chemistry, Merck & Co., Inc. , West Point, Pennsylvania 19486, United States.
12
Pharmaron Beijing Co., Ltd. , Beijing 100176, China.

Abstract

Neurofibrillary tangles (NFTs) made up of aggregated tau protein have been identified as the pathologic hallmark of several neurodegenerative diseases including Alzheimer's disease. In vivo detection of NFTs using PET imaging represents a unique opportunity to develop a pharmacodynamic tool to accelerate the discovery of new disease modifying therapeutics targeting tau pathology. Herein, we present the discovery of 6-(fluoro-(18)F)-3-(1H-pyrrolo[2,3-c]pyridin-1-yl)isoquinolin-5-amine, 6 ([(18)F]-MK-6240), as a novel PET tracer for detecting NFTs. 6 exhibits high specificity and selectivity for binding to NFTs, with suitable physicochemical properties and in vivo pharmacokinetics.

PMID:
27088900
DOI:
10.1021/acs.jmedchem.6b00166
[Indexed for MEDLINE]

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