Variant Gene Risk Allele Score vda Association Type Original DB Sentence supporting the association PMID PMID Year
dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE To elucidate the specific role of the TT genotype of MTHFR in the development of cerebral infarction with and without cognitive impairment, we determined the prevalence of hyperhomocyst(e)inemia and the C677T genotypes of MTHFR in 143 patients with vascular dementia, 122 patients with cerebral infarction, and 217 healthy subjects matched for age and sex. 10938012

2000

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE These data suggest that both MTHFR C677T and eNOS G894T variants should be regarded as genetic risk factors for hyperhomocysteinemia in patients with cognitive decline. 21607713

2011

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE The T allele in a C677T variant in methylenetetrahydrofolate reductase (MTHFR) gene is associated with elevated plasma homocysteine, which is detrimental to vascular integrity and has been linked to cognitive decline. 19013496

2009

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Both CT genotype and T allele of MTHFR C677T gene polymorphism were found to pose significant decreased risk for CI. 30245375

2018

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE We designed this study to determine if tHcy is causally related to cognitive impairment in later life by investigating its association with high tHcy and the MTHFR-C677T polymorphism. 21358708

2012

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Although the intermediate mechanisms for C677T effects remain uncertain, these results suggest that MTHFR-related cognitive impairment and negative symptoms reflect differing neural substrates. 17344026

2007

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Apolipoprotein E epsilon-4 (APOE ε4) allele, methylenetetrahydrofolate reductase (MTHFR C677T), and methionine synthase (MTR A2756G) were tested their associations with cognitive impairment in people with late-life depression (LLD). 27111719

2017

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Low folate intake and genetic variants in folate metabolism, such as the methylenetetrahydrofolate reductase (MTHFR) 677 C>T polymorphism, have been suggested to impact brain function and increase the risk for cognitive decline and late-onset Alzheimer's disease. 30288696

2019

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Hyperhomocysteinemia, intima-media thickness and C677T MTHFR gene polymorphism: a correlation study in patients with cognitive impairment. 19342053

2009

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE The current study did not find evidence of an association between the MTHFR C677T TT genotype and impaired cognition or depression in a population with adequate folate status and a high prevalence of cognitive impairment and depression. 22739363

2012

dbSNP: rs1217691063
rs1217691063
0.100 GeneticVariation BEFREE Methylenetetrahydrofolate reductase 677C>T and methionine synthase 2756A>G mutations: no impact on survival, cognitive functioning, or cognitive decline in nonagenarians. 17339646

2007

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE Our analyses suggested the G196A (Val66Met) polymorphism was significantly associated with cog</span>nitive impairment in PD, especially in Caucasian populations. 31365694

2019

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE Functional rs6265 polymorphism in the brain-derived neurotrophic factor gene confers protection against neurocognitive dysfunction in posttraumatic stress disorder among Chinese patients with hepatocellular carcinoma. 30659644

2019

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE Our results do not support that the common genetic risk variants in rs6265 and rs1006737 are associated with cognitive dysfunction. 27221213

2016

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE Our meta-analysis implicates Val66Met BDNF polymorphism may be associated with Parkinson's disease cognitive impairment, further well-designed studies with larger populations are required to validate these results owing to the limited research. 31104169

2019

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE This study investigated the effects of BDNF Val66Met polymorphism on functional magnetic resonance imaging (fMRI) during n-back WM tasks in healthy middle-aged adults.A total of 110 participants without subjective or objective cognitive impairment underwent BDNF genotyping. 26496261

2015

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE The association between decreased BDNF serum levels and cognitive impairment in schizophrenia is dependent on the BDNF Val66Met polymorphism. 22362486

2012

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE A total of 1,081 adults without dementia (375 healthy subjects and 706 individuals with mild cognitive impairment) were recruited from the Alzheimer's Disease Neuroimaging Initiative (ADNI) to test the influence of BDNF Val66Met polymorphism on cognitive impairment, brain structure atrophy, and change in the levels of CSF biomarkers. 30775992

2019

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE The association between higher BDNF levels and cognitive impairment, mainly attention in smokers appears to be dependent on the BDNF Val66Met polymorphism. 30659208

2019

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE Brain-derived neurotrophic factor (BDNF) Val66Met polymorphism has previously been implicated in Alzheimer's disease (AD)-related cognitive impairment. 23769397

2013

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE We investigated whether a common Val66Met missense polymorphism (rs6265) of the BDNF gene is associated with individual differences in cognitive decline (marked by perceptual speed) in old age. 24660789

2014

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE The effect of the Val66Met polymorphism on synaptic transmission and plasticity in the IL-mPFC represents a mechanism to account for this impact of SNP on affective disorders and cognitive dysfunction. 22396415

2012

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE <i>BDNF</i> gene Val66Met variation may be associated with cognitive deficits in T2DM, especially with delayed memory. 29423073

2018

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE The BDNF val66met polymorphism is a potential vulnerability factor for cognitive impairment in BD. 24862657

2014

dbSNP: rs6265
rs6265
0.100 GeneticVariation BEFREE These results suggest a role for BDNF Val66Met polymorphism on cognitive impairment in PD. 26806863

2016