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Clinical Chemistry 38: 480-485, 1992;
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Clinical Chemistry, Vol 38, 480-485, Copyright © 1992 by American Association for Clinical Chemistry

Acyclic adenine nucleoside phosphonates in plasma determined by high- performance liquid chromatography with fluorescence detection

L Naesens, J Balzarini and E De Clercq
Rega Institute for Medical Research, Katholieke Universiteit Leuven, Belgium.

9-(2-Phosphonylmethoxyethyl)adenine (PMEA), (S)-9-(3-hydroxy-2- phosphonylmethoxypropyl)adenine (HPMPA), and (R,S)-9-(3-fluoro-2- phosphonylmethoxypropyl)adenine (FPMPA) are selective antiviral agents with activity against a broad spectrum of DNA viruses and retroviruses. A highly sensitive method has been developed to determine concentrations of these compounds in human plasma. Plasma samples containing PMEA, HPMPA, or FPMPA were treated with chloroacetaldehyde to yield the corresponding highly fluorescent 1,N6-ethenoadenine derivatives. Chromatographic separation combined with excitation at 254 nm and fluorescence detection at 425 nm allowed quantification of PMEA, HPMPA, and FPMPA within a concentration range of 0.25-4000 mumol/L. This method proved useful in accurately determining low PMEA concentrations in sera from PMEA-treated monkeys and cats. The assay should be applicable to the quantification of PMEA, HPMPA, and FPMPA in plasma and urine of humans treated with any of these drugs.




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Copyright © 1992 by the American Association for Clinical Chemistry.