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Identification and characterization of a phenyl-thiazolyl-benzoic acid derivative as a novel RAR/RXR agonist

Koshiishi, Chie and Kanazawa, Takanori and Vangrevelinghe, Eric and Honda, Toshiyuki and Hatakeyama, Shinji (2019) Identification and characterization of a phenyl-thiazolyl-benzoic acid derivative as a novel RAR/RXR agonist. Heliyon, 5 (11). e02849. ISSN 2405-8440

Abstract

Objective
To identify an agonist of RXRα and RARα with reduced undesired profiles of all-trans retinoic acid for differentiation-inducing therapy of acute promyelocytic leukemia (APL), such as its susceptibility to P450 enzyme, induction of P450 enzyme, increased sequestration by cellular retinoic acid binding protein and increased expression of P-glycoprotein, a virtual screening was performed.

Results and conclusion
In this study, a phenyl-thiazolyl-benzoic acid derivative (PTB) was identified as a potent agonist of RXRα and RARα. PTB was characterized in nuclear receptor binding, reporter gene, cell differentiation and cell growth assays. PTB bound directly to RXRα and RARα, but not to PPARα, δ(β) or γ. PTB fully activated reporter genes with enhancer elements for RXRα/RXRα, and partially activated reporter genes with enhancer elements for RARα/RXRα, PPARδ(β) and PPARγ. Furthermore, PTB induced differentiation and inhibited the growth of human APL cells. Thus, PTB is a novel dual agonist of RXRα and RARα and works as both a differentiation inducer and a proliferation inhibitor to leukemic cells.

Item Type: Article
Date Deposited: 03 Dec 2019 00:45
Last Modified: 03 Dec 2019 00:45
URI: https://oak.novartis.com/id/eprint/38254

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