Abstract
Cytochrome P450 2D6 (CYP2D6) is a key enzyme in the transformation of the Tamoxifen (TAM) in its most active two derivatives, a 4-hydroxy-TAM and Endoxifen. The hypothesis that a genetic polymorphism of CYP2D6 and/or concomitant absorption of these enzyme-inhibitory drugs can modify both the frequency and intensity of hot flushes and the antineoplastic therapeutic efficacy is the object of dissenting conclusions in the available literature. CYP2D6 genotyping is not the object of official recommendation at present before prescription of TAM while a common recommendation of Afssaps and INCa contraindicates the co-prescription of the paroxetine and the fluoxetine with the TAM.
Résumé
Le cytochrome P450 2D6 (CYP2D6) est un enzyme clé de la transformation du tamoxifène (TAM) en ses deux dérivés les plus actifs, le 4-hydroxy-TAM et l’endoxifène. L’hypothèse qu’un polymorphisme génétique du CYP2D6 et/ou la prise concomitante de médicaments inhibiteurs de cet enzyme puissent modifier sous TAM à la fois la fréquence et l’intensité des bouffées de chaleur (BdC) d’une part, et l’efficacité thérapeutique antinéoplasique d’autre part, fait l’objet de conclusions discordantes dans la littérature disponible. Il n’y a pas actuellement de recommandation officielle au génotypage du CYP2D6 avant prescription de TAM alors qu’une recommandation commune de l’Afssaps et de l’INCa contreindique la coprescription de la paroxétine et de la fluoxétine avec le TAM.
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Boutet, G. Bouffées de chaleur, tamoxifène et cytochrome P450 2D6 . Oncologie 14, 357–364 (2012). https://doi.org/10.1007/s10269-012-2170-9
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DOI: https://doi.org/10.1007/s10269-012-2170-9