Journal
JOURNAL OF MEDICINAL CHEMISTRY
Volume 64, Issue 10, Pages 6730-6744Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jmedchem.0c02271
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Inhibition of HAO1 is a strategy to reduce toxic oxalate accumulation in PH1 patients. Novel compounds have been identified as potent HAO1 inhibitors, with Compound 5 being optimized to Compound 29 for improved ADME/PK properties. Further research on replacing acidic compounds led to the discovery of a non-acid inhibitor, Compound 31, with weaker potency but increased permeability.
Inhibition of hydroxy acid oxidase 1 (HAO1) is a strategy to mitigate the accumulation of toxic oxalate that results from reduced activity of alanine-glyoxylate aminotransferase (AGXT) in primary hyperoxaluria 1 (PH1) patients. DNA-Encoded Chemical Library (DECL) screening provided two novel chemical series of potent HAO1 inhibitors, represented by compounds 3-6. Compound 5 was further optimized via various structure-activity relationship (SAR) exploration methods to 29, a compound with improved potency and absorption, distribution, metabolism, and excretion (ADME)/pharmacokinetic (PK) properties. Since carboxylic acid-containing compounds are often poorly permeable and have potential active glucuronide metabolites, we undertook a brief, initial exploration of acid replacements with the aim of identifying non-acid-containing HAO1 inhibitors. Structure-based drug design initiated with Compound 5 led to the identification of a nonacid inhibitor of HAO1, 31, which has weaker potency and increased permeability.
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