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Discovery, Synthesis, and Optimization of Diarylisoxazole-3- carboxamides as Potent Inhibitors of the Mitochondrial Permeability Transition Pore
Roy, Sudeshna Šileikytė, Justina Schiavone, Marco Neuenswander, Benjamin Argenton, Francesco Aubé, Jeffrey Hendrick, Michael P. Chung, Thomas D. Y. Forte, Michael A. Bernardi, Paolo
Roy, Sudeshna
Å ileikytÄ—, Justina
Schiavone, Marco
Neuenswander, Benjamin
Argenton, Francesco
Aubé, Jeffrey
Hendrick, Michael P.
Chung, Thomas D. Y.
Forte, Michael A.
Bernardi, Paolo
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Abstract
The mitochondrial permeability transition pore (mtPTP) is a Ca2+-requiring mega-channel which, under pathological conditions, leads to the deregulated release of Ca2+ and mitochondrial dysfunction, ultimately resulting in cell death. Although the mtPTP is a potential therapeutic target for many human pathologies, its potential as a drug target is currently unrealized. Herein we describe an optimization effort initiated around hit 1, 5-(3-hydroxyphenyl)-N-(3,4,5-trimethoxyphenyl)isoxazole-3-carboxamide, which was found to possess promising inhibitory activity against mitochondrial swelling (EC50 < 0.39 µm) and showed no interference on the inner mitochondrial membrane potential (rhodamine 123 uptake EC50 > 100 µm). This enabled the construction of a series of picomolar mtPTP inhibitors that also potently increase the calcium retention capacity of the mitochondria. Finally, the therapeutic potential and in vivo efficacy of one of the most potent analogues, N-(3-chloro-2-methylphenyl)-5-(4-fluoro-3-hydroxyphenyl)isoxazole-3-carboxamide (60), was validated in a biologically relevant zebrafish model of collagen VI congenital muscular dystrophies.
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This is the peer reviewed version of the following article: Roy, S., Šileikytė, J., Schiavone, M., Neuenswander, B., Argenton, F., Aubé, J., … Schoenen, F. J. (2015). Discovery, Synthesis, and Optimization of Diarylisoxazole-3-carboxamides as Potent Inhibitors of the Mitochondrial Permeability Transition Pore. ChemMedChem, 10(10), 1655–1671. http://doi.org/10.1002/cmdc.201500284, which has been published in final form at doi.org/10.1002/cmdc.201500284. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Date
2015-10
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Wiley
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Keywords
Calcium retention capacity, Mitochondria, Muscular dystrophy, Permeability transition, Zebrafish
Citation
Roy, S., Šileikytė, J., Schiavone, M., Neuenswander, B., Argenton, F., Aubé, J., … Schoenen, F. J. (2015). Discovery, Synthesis, and Optimization of Diarylisoxazole-3-carboxamides as Potent Inhibitors of the Mitochondrial Permeability Transition Pore. ChemMedChem, 10(10), 1655–1671. http://doi.org/10.1002/cmdc.201500284