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Lipoic acid analogs with enhanced pharmacological activity
Steven A Kates1, Ralph A Casale1, Alexander Baguisi1
1Ischemix, LLC, 63 Great Road, Maynard, MA 01759, United States.
Abstract:
Lipoic acid (1,2-dithiolane-3-pentanoic acid) is a pharmacophore with unique antioxidant and cytoprotective properties. We synthesized a library based upon the condensation of natural and unnatural amino acids with the carboxylic acid moiety of lipoic acid. SAR studies were conducted using a cardiac ischemia-reperfusion animal model. Cytoprotective efficacy was associated with the R-enantiomer of the dithiolane. Potency of library compounds was dictated by the acidic strength of the adduct. α-N-[(R)-1,2-dithiolane-3-pentanoyl]-L-glutamyl-L-alanine, designated CMX-2043, was chosen for further pharmacologic evaluation.
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