Sparteine oxidation polymorphism in Greenlanders living in Denmark.

• Main Author: Brøsen, K
• Format: Text
• Language: English
• Published: 1986
• Subjects: Research Article; greenlander*
• Online Access: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1401149; http://www.ncbi.nlm.nih.gov/pubmed/3768256

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.