Warfarin enantiomer disposition: Determination by stereoselective radioimmunoassay

C. E. Cook, Noel Ballentine, T. B. Seltzman, C. R. Tallent

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Immunoassay techniques offer promise for the selective analysis of enantiomeric substances without prior separation. In a demonstration of this selective analysis, radioimmunoassays were developed for R- and S-warfarin. The 4'-carboxyethyl analog of R,S-warfarin was resolved and the enantiomeric acids were coupled to bovine serum albumin. Immunization of rabbits with the conjugates led to formation of antisera which selectively bound the predicted enantiomer. Cross-reactions with various metabolites of warfarin were low (0.1-4%) except for 4'-hydroxywarfarin, as were cross-reactions with the opposite enantiomer (0.3-3%). Assays were developed and used to determine enantiomer half-lives in rats dosed with racemic warfarin. Results were consistent with those found previously by administration of individual enantiomers, thus indicating the utility of the radioimmunoassay method.

Original languageEnglish (US)
Pages (from-to)391-398
Number of pages8
JournalJournal of Pharmacology and Experimental Therapeutics
Volume210
Issue number3
StatePublished - Dec 1 1979

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Warfarin
Radioimmunoassay
Cross Reactions
Bovine Serum Albumin
Immunoassay
Immune Sera
Immunization
Rabbits
Acids

All Science Journal Classification (ASJC) codes

  • Molecular Medicine
  • Pharmacology

Cite this

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Warfarin enantiomer disposition : Determination by stereoselective radioimmunoassay. / Cook, C. E.; Ballentine, Noel; Seltzman, T. B.; Tallent, C. R.

In: Journal of Pharmacology and Experimental Therapeutics, Vol. 210, No. 3, 01.12.1979, p. 391-398.

Research output: Contribution to journalArticle

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