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J Med Chem. 2019 Feb 28;62(4):2112-2126. doi: 10.1021/acs.jmedchem.8b01848. Epub 2019 Feb 15.

Tuning Nuclear Receptor Selectivity of Wy14,643 towards Selective Retinoid X Receptor Modulation.

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Institute of Pharmaceutical Chemistry , Goethe University Frankfurt , Max-von-Laue-Str. 9 , D-60438 Frankfurt , Germany.
Project Group Translational Medicine and Pharmacology TMP , Fraunhofer IME , Theodor-Stern-Kai 7 , D-60596 Frankfurt , Germany.


The fatty acid sensing nuclear receptor families retinoid X receptors (RXRs) and peroxisome proliferator-activated receptors (PPARs) hold therapeutic potential in neurodegeneration. Valuable pleiotropic activities of Wy14,643 in models of such conditions exceed its known PPAR agonistic profile. Here, we characterize the compound as an RXR agonist explaining the pleiotropic effects and report its systematic structure-activity relationship analysis with the discovery of specific molecular determinants driving activity on PPARs and RXRs. We have designed close analogues of the drug comprising selective and dual agonism on RXRs and PPARs that may serve as superior pharmacological tools to study the role and interplay of the nuclear receptors in various pathologies. A systematically optimized high potency RXR agonist revealed activity in vivo and active concentrations in brain. With its lack of RXR/liver X receptor-mediated side effects and superior profile compared to classical rexinoids, it establishes a new class of innovative RXR modulators to overcome key challenges in RXR targeting drug discovery.

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