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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Evidence for a dissociation in the control of sparteine, debrisoquine and metoprolol metabolism in Nigerians.

The 0-8 hour urinary distributions of the metabolic ratios of sparteine (100 mg), debrisoquine (10 mg) and metoprolol (100 mg) were measured in 165 healthy, unrelated, black Nigerian medical students. There was a weak correlation (rs = 0.51, p < 0.001; n = 82) between the metoprolol/alpha-hydroxymetoprolol (M/HM) and the sparteine/total (2- + 5-) dehydrosparteine (S/ DHS) ratios. No significant correlations were found between the debrisoquine/4-hydroxydebrisoquine (D/HD) and M/HM ratios (rs = 0.16, n = 33) and between the D/HD and S/ DHS ratios (rs = 0.31, n = 38). Both visual inspection and kernel density analysis of the data suggested the presence of two phenotypic groups for sparteine oxidation, with 4% of the population studied being putative poor metabolizers. In contrast biomodality was not apparent in the distribution of the log10M/HM and log10D/HD ratios. These findings provide evidence for a dissociation in the control of metoprolol, sparteine and debrisoquine oxidation in Nigerians and highlight the difficulties in the interpretation of data from pharmacogenetic studies in different ethnic groups.[1]

References

  1. Evidence for a dissociation in the control of sparteine, debrisoquine and metoprolol metabolism in Nigerians. Lennard, M.S., Iyun, A.O., Jackson, P.R., Tucker, G.T., Woods, H.F. Pharmacogenetics (1992) [Pubmed]
 
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