C677T or rs1801133 is a genetic variation—a single nucleotide polymorphism (SNP)—in the MTHFR gene.
| SNP: rs1801133 | |
|---|---|
| Name(s) | C677T, Ala222Val, A222V |
| Gene | MTHFR |
| Chromosome | 1 |
| External databases | |
| Ensembl | Human SNPView |
| dbSNP | 1801133 |
| HapMap | 1801133 |
| SNPedia | 1801133 |
| AlzGene | Meta-analysis Overview |
| SzGene | Meta-analysis Overview |
Among Americans the frequency of T-homozygosity ranges from 1% or less among people of sub-Saharan African descent to 20% or more among Italians and Hispanics.[1]
It has been related to
In 2000 association studies on oral clefts, Down syndrome, and fetal anticonvulsant syndrome were either unreplicated or had yielded conflicting results.[1]
Related genetic variants
editA1298C is a SNP in the same gene. Studies have investigated the combined effect of C677T and A1298C.[6]
References
edit- ^ a b c L. D. Botto & Q. Yang (May 2000). "5,10-Methylenetetrahydrofolate reductase gene variants and congenital anomalies: a HuGE review". American Journal of Epidemiology. 151 (9): 862–867. doi:10.1093/oxfordjournals.aje.a010290. PMID 10791559.
- ^ "Meta-Analysis of All Published Schizophrenia-Association Studies (Case-Control Only) for (C677T) polymorphism, MTHFR gene". Schizophrenia Research Forum. Archived from the original on 2012-02-09. Retrieved 2007-03-11.
- ^ "Meta-analysis of all published AD association studies (case-control only)". Alzheimer Research Forum. Archived from the original on 2012-02-25. Retrieved 2008-08-02.
- ^ S. J. Lewis, D. A. Lawlor, G. Davey Smith, R. Araya, N. Timpson, I. N. M. Day & S. Ebrahim (April 2006). "The thermolabile variant of MTHFR is associated with depression in the British Women's Heart and Health Study and a meta-analysis". Molecular Psychiatry. 11 (4): 352–60. doi:10.1038/sj.mp.4001790. PMID 16402130.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Schmidt, Rebecca J.; Hansen, Robin L.; Hartiala, Jaanad; Allayee, Hoomand; Schmidt, Linda C.; Tancredi, Daniel J.; Tassone, Florab; Hertz-Picciotto, Irvaa (2011). "Prenatal Vitamins, One-carbon Metabolism Gene Variants, and Risk for Autism". Epidemiology. 22 (4): 476–485. doi:10.1097/EDE.0b013e31821d0e30. PMC 3116691. PMID 21610500. Retrieved 2011-06-20.
- ^ Naomi Q. Hanson, Ömer Aras, Feng Yang & Michael Y. Tsai (April 2001). "C677T and A1298C polymorphisms of the methylenetetrahydrofolate reductase gene: incidence and effect of combined genotypes on plasma fasting and post-methionine load homocysteine in vascular disease". Clinical Chemistry. 47 (4): 661–666. doi:10.1093/clinchem/47.4.661. PMID 11274015.
{{cite journal}}: CS1 maint: multiple names: authors list (link)