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01.03.2013 | Original Contribution

Vitamin C-related nutrient–nutrient and nutrient–gene interactions that modify folate status

verfasst von: Mark Lucock, Zoë Yates, Lyndell Boyd, Charlotte Naylor, Jeong-Hwa Choi, Xiaowei Ng, Virginia Skinner, Ron Wai, Jeremy Kho, Sa Tang, Paul Roach, Martin Veysey

Erschienen in: European Journal of Nutrition | Ausgabe 2/2013

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Abstract

Purpose

Folate-related nutrient–nutrient and nutrient–gene interactions modify disease risk; we therefore examined synergistic relationships between dietary folic acid, vitamin C and variant folate genes with respect to red cell folate status.

Methods

Two hundred and twelve subjects were examined using chemiluminescent immunoassay, PCR and food frequency questionnaire to determine red cell and serum folate, 14 folate gene polymorphisms, dietary folate (natural and synthetic) and vitamin C.

Results

When examined independently, synthetic PteGlu correlates best with red cell folate at higher levels of intake (p = 0.0102), while natural 5CH₃-H₄-PteGlu_n correlates best with red cell folate at lower levels of intake (p = 0.0035). However, dietary vitamin C and 5CH₃-H₄-PteGlu_n interact synergistically to correlate with red cell folate at higher levels of intake (p = 0.0005). No interaction between dietary vitamin C and PteGlu was observed. This ‘natural’ nutrient–nutrient interaction may provide an alternative to synthetic PteGlu supplementation that is now linked to adverse phenomena/health outcomes. On its own, vitamin C also correlates with red cell folate (p = 0.0150) and is strongly influenced by genetic variation in TS, MTHFR and MSR, genes critical for DNA and methionine biosynthesis that underpin erythropoiesis. Similarly, dietary vitamin C and 5CH₃-H₄-PteGlu_n act synergistically to modify red cell folate status according to variation in folate genes: of note, heterozygosity for 2R3R-TS (p = 0.0181), SHMT (p = 0.0046) and all three MTHFR SNPs (p = 0.0023, 0.0015 and 0.0239 for G1793A, C677T and A1298C variants, respectively) promote a significant association with red cell folate. Again, all these genes are critical for nucleic acid biosynthesis. Folate variants with the strongest independent effect on folate status were C677T-MTHFR (p = 0.0004) and G1793A-MTHFR (p = 0.0173).

Conclusions

5CH₃-H₄-PteGlu_n assimilation and variant folate gene expression products may be critically dependent on dietary vitamin C.

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Titel: Vitamin C-related nutrient–nutrient and nutrient–gene interactions that modify folate status
verfasst von: Mark Lucock
Zoë Yates
Lyndell Boyd
Charlotte Naylor
Jeong-Hwa Choi
Xiaowei Ng
Virginia Skinner
Ron Wai
Jeremy Kho
Sa Tang
Paul Roach
Martin Veysey
Publikationsdatum: 01.03.2013
Verlag: Springer-Verlag
Erschienen in: European Journal of Nutrition / Ausgabe 2/2013
Print ISSN: 1436-6207
Elektronische ISSN: 1436-6215
DOI: https://doi.org/10.1007/s00394-012-0359-8

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Vitamin C-related nutrient–nutrient and nutrient–gene interactions that modify folate status

Abstract

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Methods

Results

Conclusions

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