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Discovery of a Slow Tight Binding LPA1 Antagonist (ONO-0300302) for the Treatment of Benign Prostatic Hyperplasia.


ABSTRACT: Scaffold hopping from the amide group of lead compound ONO-7300243 (1) to a secondary alcohol successfully gave a novel chemotype lysophosphatidic acid receptor 1 (LPA1) antagonist 4. Wash-out experiments using rat isolated urethra showed that compound 4 possesses a tight binding feature to the LPA1 receptor. Further modification of two phenyl groups of 1 to pyrrole and an indane moiety afforded an optimized compound ONO-0300302 (19). Despite its high i.v. clearance, 19 inhibited significantly an LPA-induced increase of intraurethral pressure (IUP) in rat (3 mg/kg, p.o.) and dog (1 mg/kg, p.o.) over 12 h. Binding experiments with [3H]-ONO-0300302 suggest that the observed long duration action is because of the slow tight binding character of 19.

SUBMITTER: Terakado M 

PROVIDER: S-EPMC5733272 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature

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Scaffold hopping from the amide group of lead compound <b>ONO-7300243</b> (<b>1</b>) to a secondary alcohol successfully gave a novel chemotype lysophosphatidic acid receptor 1 (LPA<sub>1</sub>) antagonist <b>4</b>. Wash-out experiments using rat isolated urethra showed that compound <b>4</b> possesses a tight binding feature to the LPA<sub>1</sub> receptor. Further modification of two phenyl groups of <b>1</b> to pyrrole and an indane moiety afforded an optimized compound <b>ONO-0300302</b> (<b  ...[more]

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