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  • Title: Sparteine oxidation polymorphism in Greenlanders living in Denmark.
    Author: Brøsen K.
    Journal: Br J Clin Pharmacol; 1986 Oct; 22(4):415-9. PubMed ID: 3768256.
    Abstract:
    Sparteine oxidation appeared to be polymorphic in 185 healthy Greenlanders living in Denmark. Six subjects (3.2%) were phenotyped as poor metabolizers (PM) and 179 subjects as extensive metabolizers (EM). The metabolic ratio (MR) between sparteine and 2- + 5-dehydrosparteine in a 12 h urine sample ranged from 0.06-3.12 in EM and from 30-480 in PM. The excretion of dehydrosparteines accounted for less than 2.2% of the dose in PM and ranged from 5.6%-63% in EM. The urinary recovery (% of dose) of sparteine, 2-dehydrosparteine and total sparteine + dehydrosparteines was lower in Greenlander EM than in Danish EM (Brøsen et al., 1985). Incomplete urine collection in a substantial proportion of the Greenlanders could explain these discrepancies.
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