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Title: Development of Dihydroxyphenyl Sulfonylisoindoline Derivatives as Liver-Targeting Pyruvate Dehydrogenase Kinase Inhibitors

Journal Article · · Journal of Medicinal Chemistry

Pyruvate dehydrogenase kinases 1–4 (PDK1–4) negatively control activity of the pyruvate dehydrogenase complex (PDC) and are up-regulated in obesity, diabetes, heart failure, and cancer. We reported earlier two novel pan-PDK inhibitors PS8 [4-((5-hydroxyisoindolin-2-yl)sulfonyl)benzene-1,3-diol] (1) and PS10 [2-((2,4-dihydroxyphenyl)sulfonyl)isoindoline-4,6-diol] (2) that targeted the ATP-binding pocket in PDKs. Here, we developed a new generation of PDK inhibitors by extending the dihydroxyphenyl sulfonylisoindoline scaffold in 1 and 2 to the entrance region of the ATP-binding pocket in PDK2. The lead inhibitor (S)-3-amino-4-(4-((2-((2,4-dihydroxyphenyl)sulfonyl)isoindolin-5-yl)amino)piperidin-1-yl)-4-oxobutanamide (17) shows a ~8-fold lower IC50 (58 nM) than 2 (456 nM). In the crystal structure, the asparagine moiety in 17 provides additional interactions with Glu-262 from PDK2. Treatment of diet-induced obese mice with 17 resulted in significant liver-specific augmentation of PDC activity, accompanied by improved glucose tolerance and drastically reduced hepatic steatosis. Furthermore, these findings support 17 as a potential glucose-lowering therapeutic targeting liver for obesity and type 2 diabetes.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Institutes of Health (NIH); I-1286
Grant/Contract Number:
DK62306; 2014CB849603
OSTI ID:
1343990
Journal Information:
Journal of Medicinal Chemistry, Vol. 60, Issue 3; ISSN 0022-2623
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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