Optimization of a Dicarboxylic Series for in Vivo Inhibition of Citrate Transport by the Solute Carrier 13 (SLC13) Family

J Med Chem. 2016 Feb 11;59(3):1165-75. doi: 10.1021/acs.jmedchem.5b01752. Epub 2016 Jan 27.

Abstract

Inhibition of the sodium-coupled citrate transporter (NaCT or SLC13A5) has been proposed as a new therapeutic approach for prevention and treatment of metabolic diseases. In a previous report, we discovered dicarboxylate 1a (PF-06649298) which inhibits the transport of citrate in in vitro and in vivo settings via a specific interaction with NaCT. Herein, we report the optimization of this series leading to 4a (PF-06761281), a more potent inhibitor with suitable in vivo pharmacokinetic profile for assessment of in vivo pharmacodynamics. Compound 4a was used to demonstrate dose-dependent inhibition of radioactive [(14)C]citrate uptake in liver and kidney in vivo, resulting in modest reductions in plasma glucose concentrations.

MeSH terms

  • Animals
  • Biological Transport / drug effects
  • Blood Glucose / metabolism
  • Citrates / metabolism*
  • Citrates / pharmacokinetics
  • Dose-Response Relationship, Drug
  • HEK293 Cells
  • Hepatocytes / drug effects
  • Humans
  • Kidney / drug effects
  • Kidney / metabolism
  • Liver / drug effects
  • Liver / metabolism
  • Malates / administration & dosage
  • Malates / chemistry*
  • Malates / pharmacology*
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Obese
  • Molecular Structure
  • Phenylbutyrates / administration & dosage
  • Phenylbutyrates / chemistry*
  • Phenylbutyrates / pharmacology*
  • Pyridines / administration & dosage
  • Pyridines / chemistry*
  • Pyridines / pharmacology*
  • Rats
  • Rats, Sprague-Dawley
  • Structure-Activity Relationship
  • Symporters / antagonists & inhibitors*
  • Symporters / metabolism

Substances

  • Blood Glucose
  • Citrates
  • Malates
  • PF-06649298
  • PF-06761281
  • Phenylbutyrates
  • Pyridines
  • SLC13A5 protein, human
  • Symporters