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Table 2 B vitamin status and tHcy according to genotype

From: Riboflavin status modifies the effects of methylenetetrahydrofolate reductase (MTHFR) and methionine synthase reductase (MTRR) polymorphisms on homocysteine

 

N (%)

EGRACa,b

EASTACa,c

PFd (nmol/L)

B d12 (pmol/L)

tHcye (µmol/L)

All

771 (100)

1.38 (1.36, 1.39)

1.66 (1.64, 1.68)

11.5 (11.0, 11.9)

346 (337, 355)

9.55 (9.36, 9.75)

MTHFR 677

 CC

276 (35.9)

1.39 (1.36, 1.42)

1.66 (1.63, 1.69)

12.4 (11.6, 13.2)

356 (342, 371)

9.02 (8.74, 9.30)

 CT

356 (46.3)

1.38 (1.36, 1.41)

1.66 (1.64, 1.69)

11.3 (10.7, 12.0)*,†

340 (328, 353)

9.34 (9.10, 9.60)†††

 TT

137 (17.8)

1.35 (1.31, 1.39)

1.66 (1.63, 1.70)

10.1 (9.2, 11.1)***

340 (317, 363)

11.35 (10.72, 12.02)***

MTRR 66

 AA

194 (25.9)

1.39 (1.35, 1.43)

1.68 (1.65, 1.70)

11.0 (10.1, 11.9)

356 (339, 374)

9.26 (8.92, 9.62)

 AG

375 (50.0)

1.38 (1.35, 1.40)

1.66 (1.64, 1.69)

11.9 (11.2, 12.5)

334 (321, 348)***,†

9.55 (9.27, 9.84)

 GG

181 (24.1)

1.37 (1.34, 1.41)

1.64 (1.61, 1.67)

10.9 (10.1, 11.8)

357 (341, 375)

9.81 (9.39, 10.25)

MTRR 524

 CC

302 (40.2)

1.36 (1.34, 1.39)

1.66 (1.64, 1.69)

11.5 (10.8, 12.2)

341 (327, 356)

9.58 (9.30, 9.86)

 CT

348 (46.3)

1.39 (1.36, 1.42)

1.66 (1.63, 1.68)

11.3 (10.7, 12.0)

346 (333, 359)

9.60 (9.30, 9.90)

 TT

101 (13.5)

1.40 (1.35, 1.44)

1.67 (1.62, 1.71)

11.4 (10.3, 12.7)

355 (331, 382)

9.23 (8.64, 9.86)

  1. EGRAC Erythrocyte glutathionine reductase activation coefficient, EASTAC erythrocyte aspartate aminotransferase activation coefficient, PF plasma folate, tHcy total fasting plasma homocysteine, MTHFR methylenetetrahydrofolate reductase, MTRR methionine synthase reductase
  2. ANOVA: * p < 0.05; ** p < 0.01; *** p < 0.001 versus wild type; †  p < 0.05; †††  p < 0.001 versus homozygous mutant allele
  3. aArithmetic mean, riboflavin stauts, vitamin B6 status, geometric mean, geometric mean adjusted for study centre (95 % CI)