title: Variation of phylloquinone (vitamin K1) concentrations in hemodialysis patients.
abstract: Intra- and interindividual variation of phylloquinone (vitamin K1) concentrations was investigated by repeat analysis of serum from 28 hemodialysis patients with different apolipoprotein E genotypes. Phylloquinone concentrations ranged from 0.1 to 9.0 nM, with a mean of 1.08 nM (standard deviation 1.90 nM). Most of the variation in serum phylloquinone concentrations was due to differences between patients; the ratio of intra- to interindividual variation was 0.17. Serum triglyceride concentrations and apoE genotype together accounted for 64% of interindividual variation; in contrast, only 6% of intraindividual variation could be attributed to differences in triglyceride concentrations. The small residual variance implies that different phylloquinone consumption levels contributed relatively little to the variation of serum concentrations ( < 36% of interindividual variance). The results suggest that individual disposition is a more important determinant of serum phylloquinone concentrations than dietary phylloquinone intake.
authors.affiliation: Dept. of Nutrition, School of Medicine, UNC, Chapel Hill 27599-7400, USA.
authors.forename: M
authors.initials: M
authors.lastname: Kohlmeier
authors.forename: J
authors.initials: J
authors.lastname: Saupe
authors.forename: H J
authors.initials: HJ
authors.lastname: Drossel
authors.forename: M J
authors.initials: MJ
authors.lastname: Shearer
mesh_terms: D000368:Aged; D006801:Humans; D008875:Middle Aged; D006435:Renal Dialysis; D051437:Renal Insufficiency / Q000097:blood* / Q000628:therapy; D010837:Vitamin K 1 / Q000097:blood*
chemical_list: D010837:Vitamin K 1