Improvement of physiochemical properties of the tetrahydroazepinoindole series of farnesoid X receptor (FXR) agonists: beneficial modulation of lipids in primates

J Med Chem. 2010 Feb 25;53(4):1774-87. doi: 10.1021/jm901650u.

Abstract

In an effort to develop orally active farnesoid X receptor (FXR) agonists, a series of tetrahydroazepinoindoles with appended solubilizing amine functionalities were synthesized. The crystal structure of the previously disclosed FXR agonist, 1 (FXR-450), aided in the design of compounds with tethered solubilizing functionalities designed to reach the solvent cavity around the hFXR receptor. These compounds were soluble in 0.5% methylcellulose/2% Tween-80 in water (MC/T) for oral administration. In vitro and in vivo optimization led to the identification of 14dd and 14cc, which in a dose-dependent fashion regulated low density lipoprotein cholesterol (LDLc) in low density lipoprotein receptor knockout (LDLR(-/-)) mice. Compound 14cc was dosed in female rhesus monkeys for 4 weeks at 60 mg/kg daily in MC/T vehicle. After 7 days, triglyceride (TG) levels and very low density lipoprotein cholesterol (VLDLc) levels were significantly decreased and LDLc was decreased 63%. These data are the first to demonstrate the dramatic lowering of serum LDLc levels by a FXR agonist in primates and supports the potential utility of 14cc in treating dyslipidemia in humans beyond just TG lowering.

MeSH terms

  • Animals
  • Azepines / chemical synthesis*
  • Azepines / pharmacokinetics
  • Azepines / pharmacology
  • Biological Availability
  • Cell Line
  • Cholesterol, LDL / blood
  • Female
  • Humans
  • Hypolipidemic Agents / chemical synthesis*
  • Hypolipidemic Agents / pharmacokinetics
  • Hypolipidemic Agents / pharmacology
  • Indoles / chemical synthesis*
  • Indoles / pharmacokinetics
  • Indoles / pharmacology
  • Macaca mulatta
  • Male
  • Mice
  • Mice, Knockout
  • Microsomes, Liver / metabolism
  • Models, Molecular
  • Rats
  • Rats, Sprague-Dawley
  • Receptors, Cytoplasmic and Nuclear / agonists*
  • Receptors, LDL / genetics
  • Solubility
  • Structure-Activity Relationship
  • Triglycerides / blood

Substances

  • Azepines
  • Cholesterol, LDL
  • Hypolipidemic Agents
  • Indoles
  • Receptors, Cytoplasmic and Nuclear
  • Receptors, LDL
  • Triglycerides
  • isopropyl 8-fluoro-1,1-dimethyl-3-(4-(3-morpholin-4-ylpropoxy)benzoyl)-1,2,3,6-tetrahydroazepino(4,5-b)indole-5-carboxylate
  • farnesoid X-activated receptor

Associated data

  • PDB/3L1B