Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 113, Issue 20, Pages 7263-7269Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp901247p
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- University of Copenhagen
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The description and understanding of noncovalent interactions and distribution of potential new drug compounds in an organism is of paramount importance for the successful development of new drugs. In this work, a new procedure based on electrochemistry at the interface between two immiscible electrolyte solutions (ITIES) for addressing and discriminating. between drug compound/ligand interactions in aqueous solution and nonspecific ligand effects on oil-water distribution behavior has been developed. The procedure is demonstrated using live drug compounds with different physical chemical parameters and alpha-cyclodextrin as the aqueous phase ligand. alpha-Cyclodextrin was chosen as an aqueous phase ligand, as it is frequently used in drug formulations to enhance solubility and bioavailability of drug compounds. Supplementary capillary electrophoresis experiments provided more detailed information on alpha-cyclodextrin drug complexation and, in combination with the electrochemical studies, provided information on solvation effects affecting the oil-water distribution of the drug compounds. The use of ligand shift ion partition diagrams for data presentation is a convenient format for the visualization of ligand effects on distribution behavior of related drug compounds.
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