title: Sparteine oxidation polymorphism in Greenlanders living in Denmark.
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.
mesh_terms: D000293:Adolescent; D000328:Adult; D003718:Denmark; D005260:Female; D006116:Greenland / Q000208:ethnology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010084:Oxidation-Reduction; D010641:Phenotype; D011110:Polymorphism, Genetic; D013034:Sparteine / Q000031:analogs & derivatives / Q000378:metabolism*
chemical_list: D013034:Sparteine; C044694:2-dehydrosparteine