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- W2113468729 endingPage "70" @default.
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- W2113468729 abstract "Measures of B6 status are categorized as direct biomarkers and as functional biomarkers. Direct biomarkers measure B6 vitamers in plasma/serum, urine and erythrocytes, and among these plasma pyridoxal 5'-phosphate (PLP) is most commonly used. Functional biomarkers include erythrocyte transaminase activities and, more recently, plasma levels of metabolites involved in PLP-dependent reactions, such as the kynurenine pathway, one-carbon metabolism, transsulfuration (cystathionine), and glycine decarboxylation (serine and glycine). Vitamin B6 status is best assessed by using a combination of biomarkers because of the influence of potential confounders, such as inflammation, alkaline phosphatase activity, low serum albumin, renal function, and inorganic phosphate. Ratios between substrate-products pairs have recently been investigated as a strategy to attenuate such influence. These efforts have provided promising new markers such as the PAr index, the 3-hydroxykynurenine:xanthurenic acid ratio, and the oxoglutarate:glutamate ratio. Targeted metabolic profiling or untargeted metabolomics based on mass spectrometry allow the simultaneous quantification of a large number of metabolites, which are currently evaluated as functional biomarkers, using data reduction statistics." @default.
- W2113468729 created "2016-06-24" @default.
- W2113468729 creator A5020805900 @default.
- W2113468729 creator A5021678714 @default.
- W2113468729 creator A5026276538 @default.
- W2113468729 creator A5055368205 @default.
- W2113468729 creator A5087634044 @default.
- W2113468729 date "2015-07-17" @default.
- W2113468729 modified "2023-10-14" @default.
- W2113468729 title "Direct and Functional Biomarkers of Vitamin B6 Status" @default.
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