Biomimetic properties and estimated in vivo distribution of chloroquine and hydroxy-chloroquine enantiomers

  • Klara Livia Valko Bio-Mimetic Chromatography, Director Honorary Professor UCL School of Pharmacy https://orcid.org/0000-0003-4605-2941
  • Tong Zhang Chiral Technologies Europe, Parc d'Innovation 160, Bd Gonthier d'Andernach CS 80140 67404 ILLKIRCH CEDEX France
Biomimetic properties and estimated in vivo distribution of chloroquine and hydroxy-chloroquine enantiomers

Abstract

Chloroquine and hydroxy-chloroquine already established as anti-malarial and lupus drugs have recently gained renewed attention in the fight against the Covid-19 pandemic. Bio-mimetic HPLC methods have been used to measure the protein and phospholipid binding of the racemic mixtures of the drugs. The tissue binding and volume of distribution of the enantiomers have been estimated. The enantiomers can be separated using Chiralpak AGP HPLC columns. From the α-1-acid-glycoprotein (AGP) binding, the lung tissue binding can be estimated for the enantiomers. The drugs have a large volume of distribution, showed strong and stereoselective glycoprotein binding, medium-strong phospholipid-binding indicating only moderate phospholipidotic potential, hERG inhibition and promiscuous binding. The drug efficiency of the compounds was estimated to be greater than 2 % which indicates a high level of free biophase concentration relative to dose. The biomimetic properties of the compounds support the well-known tolerability of the drugs.

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Published
25-01-2021
Section
Original Scientific Articles