Enzyme polymorphism on the metabolic-demethylation of dextromethorphan in a Southamerican population
Medicina (B.Aires)
;
56(4): 378-82, 1996. tab, graf
Artículo
en Inglés
| LILACS
| ID: lil-186259
ABSTRACT
The polymorphic oxidative metabolism of debrisoquine and sparteine were discovered in the seventies by Mahgoub and Eichelbaum. Since then, many other therapeutic substances were added and one of these drugs is dextromethorphan. The object of this investigation was to ascertain the distribution of the oxidative phenotype of dextromethorphan in the Uruguayan population. The drug and its metabolite, dextrorphan, were quantified in the urine of 165 healthy volunteers by a modificacion of an HPLC method by Chen et al. The metabolic ratio was calculated and frequency distribution histograms were drawn. By inspection of the histogram two antimodes can be assigned which determine three sub-populations on one side the fast extensive metabolizers (n = 30, 18.2 per cent), in the middle the extensive metabolizers (n = 123, 74.5 per cent) and on the other extreme of the histogram the slow metabolizers (n = 12, 7.3 per cent). No other studies have confirmed thus far this trimodal distribution. This research will be continued by genotyping the populations studied in order to confirm these findings and to elucidate the underlying genetic mechanisms of the polymorphism.
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Índice:
LILACS (Américas)
Asunto principal:
Oxidorreductasas O-Demetilantes
/
Polimorfismo Genético
/
Dextrometorfano
/
Dextrorfano
/
Enzimas
Límite:
Adulto
/
Femenino
/
Humanos
/
Masculino
País/Región como asunto:
America del Sur
/
Uruguay
Idioma:
Inglés
Revista:
Medicina (B.Aires)
Asunto de la revista:
Medicina
Año:
1996
Tipo del documento:
Artículo
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