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Transcobalamin poly...
Transcobalamin polymorphism 67A-> G, but not 776C-> G, affects serum holotranscobalamin in a cohort of healthy middle-aged men and women
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Riedel, Bettina M. (författare)
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Molloy, Anne M. (författare)
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Meyer, Klaus (författare)
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Fredriksen, Ase (författare)
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Ulvik, Arve (författare)
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- Schneede, Jörn (författare)
- Umeå universitet,Klinisk kemi,Farmakologi
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Nexo, Ebba (författare)
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Hoff, Geir (författare)
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Ueland, Per M. (författare)
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(creator_code:org_t)
- Bethesda, Md. Elsevier BV, 2011
- 2011
- Engelska.
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Ingår i: Journal of Nutrition. - Bethesda, Md. : Elsevier BV. - 0022-3166 .- 1541-6100. ; 141:10, s. 1784-1790
- Relaterad länk:
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https://academic.oup...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- Two polymorphic variants in the gene coding for transcobalamin II (TCN2), TCN2 776C-> G and TCN2 67A-> G, may alter serum holotranscobalamin (holoTC), which in turn may affect cellular uptake of cobalamin (Cbl) and thereby Cbl status indicators. We studied the effects of TCN2 776C- > G and TCN2 67A- > G on blood concentrations of holoTC, Cbl, methylmalonic acid (MMA), and total homocysteine (tHcy) in 2411 individuals (50-64 y) that had been selected on the basis of these TCN2 genotypes from 10601 Norwegian inhabitants. The serum holoTC concentration was lower in TCN2 67AG (55 +/- 0.75 pmol/L) and 67GG (48 +/- 2.14 pmol/L) than in 67AA (62 +/- 0.67 pmol/L) (P < 0.001) but did not differ among TCN2 776C-> G genotypes. The polymorphisms interacted as serum holoTC determinants (P= 0.001) and the presence of TCN2 67AG and GG in strata of 776CC and CG, but not 776GG, increased the risk of having serum holoTC <45.6 pmol/L [tertile 1 vs. tertiles 2 and 3: OR = 2.5(95% CI 1.8-3.5) for 67AG; OR = 5.7 (95% Cl 3.5-9.1) for 67GG in 776CC; OR = 2.1 195% Cl 1.6-2.9) for 67AG; and OR = 4.5 (95% Cl 2.4-8.2) for 67GG in 776CG; all P < 0.0011. Plasma MMA, tHcy, and Cbl were not affected by either polymorphism. In summary, serum holoTC, but not plasma Cbl, MMA, or tHcy, varied according to TCN2 67A-> G genotypes. It remains to be determined whether this polymorphic effect on serum holoTC alters its diagnostic utility as Cbl status indicator.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Näringslära (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Nutrition and Dietetics (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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