Cheruvallath VK, Riley CM, Narayanan SR, Lindenbaum S, Perrin JH. A quantitative circular dichroic investigation of the binding of the enantiomers of ibuprofen and naproxen to human serum albumin.
J Pharm Biomed Anal 1997;
15:1719-24. [PMID:
9260668 DOI:
10.1016/s0731-7085(96)01956-5]
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Abstract
The binding constants for racemic, R and S naproxen and ibuprofen to human serum albumin have been determined by a circular dichroic technique. The ibuprofens and naproxens show no measurable extrinsic optical activity on interaction with the protein, and so the extrinsic Cotton effect shown following the diazepam-albumin interaction is used as a probe. The presence of the drugs reduce the amount of diazepam bound as shown by the interaction is used as a probe. The presence of the drugs reduce the amount of diazepam bound as shown by the reduced size of the induced ellipticity. The calculated primary binding constants show that the S form of both drugs bind to the albumin more tightly than the R form and that the racemic forms bind less tightly than either enantiomer.
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