Noncompetitive peak decay analysis of drug-protein dissociation by high-performance affinity chromatography.

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TitleNoncompetitive peak decay analysis of drug-protein dissociation by high-performance affinity chromatography.
Publication TypeJournal Article
Year of Publication2009
AuthorsChen, J, Schiel, JE, Hage, DS
JournalJ Sep Sci
Volume32
Issue10
Pagination1632-41
Date Published2009 May
ISSN1615-9314
KeywordsChromatography, Affinity, Humans, Ligands, Serum Albumin, Temperature, Time Factors, Warfarin
Abstract

The peak decay method is an affinity chromatographic technique that has been used to examine the dissociation of solutes from immobilized ligands in the presence of excess displacing agent. However, it can be difficult to find a displacing agent that does not interfere with detection of the eluting analyte. In this study, a noncompetitive peak decay method was developed in which no displacing agent was required for analyte elution. This method was evaluated for the study of drug-protein interactions by using it along with high-performance affinity chromatography to measure the dissociation rate constants for R- and S-warfarin from columns containing immobilized HSA. Several factors were considered in the optimization of this method, including the amount of applied analyte, the column size, and the flow rate. The dissociation rate constants for R- and S-warfarin from HSA were measured at several temperatures by this approach, giving values of 0.56 (+/-0.01) and 0.66 (+/-0.01) s(-1) at pH 7.4 and 37 degrees C. These results were in good agreement with previous values obtained by other methods. This approach is not limited to warfarin and HSA but could be employed in studying additional drug-protein interactions or other systems with weak-to-moderate binding.

DOI10.1002/jssc.200900074
Alternate JournalJ Sep Sci
PubMed ID19472288
PubMed Central IDPMC2773687
Grant ListR01 GM044931 / GM / NIGMS NIH HHS / United States
R01 GM044931 / GM / NIGMS NIH HHS / United States
R01 GM044931-16 / GM / NIGMS NIH HHS / United States