scholarly journals Methylenetetrahydrofolate Reductase (MTHFR) C677T Polymorphism and Subacute Combined Degeneration: Revealing a Genetic Predisposition

2019 ◽  
Vol 9 ◽  
Author(s):  
Xin Zhang ◽  
Chen Hou ◽  
Peng Liu ◽  
Li Chen ◽  
Yue Liu ◽  
...  
Keyword(s):  
Genetic Predisposition ◽  
Methylenetetrahydrofolate Reductase ◽  
Mthfr C677t ◽  
C677t Polymorphism ◽  
Subacute Combined Degeneration ◽  
Mthfr C677t Polymorphism

scholarly journals Subacute Combined Degeneration Associated with Methylenetetrahydrofolate Reductase (MTHFR) C677T Polymorphism

2021 ◽  
Vol 39 (4) ◽  
pp. 359-361
Author(s):  
Yun Hyeong Jeong ◽  
Suho Ro ◽  
Soei Ann ◽  
Sumin Kim ◽  
Bum Chun Suh
Keyword(s):  
Metabolic Disease ◽  
Enzyme Activity ◽  
Vitamin B12 ◽  
Methylenetetrahydrofolate Reductase ◽  
Mthfr C677t ◽  
C677t Polymorphism ◽  
Subacute Combined Degeneration ◽  
Mthfr C677t Polymorphism ◽  
Normal Enzyme ◽  
Genetic Problem

Subacute combined degeneration (SCD) is a metabolic disease caused by deficiency of vitamin B12. Rarely, it could be associated with genetic problem. An old male presented with progressive both hands weakness. Laboratory study showed deficiency of vitamin B12, but the cause was not clear. We performed a genetic study and methylenetetrahydrofolate reductase (MTHFR) C677T homozygous polymorphism with 30% of normal enzyme activity was confirmed. This case suggests SCD may occur in association with a genetic problem with MTHFR C677T polymorphism.

scholarly journals Effect of riboflavin supplementation on blood pressure and possible effect modification by the MTHFR C677T polymorphism: a randomised trial in rural Gambia

F1000Research ◽  
2020 ◽  
Vol 9 ◽  
pp. 1034
Author(s):  
Modou Jobe ◽  
Mary Ward ◽  
Bakary Sonko ◽  
Abdul Khalie Muhammad ◽  
Ebrima Danso ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Large Scale ◽  
Methylenetetrahydrofolate Reductase ◽  
Controlled Trial ◽  
Randomised Trial ◽  
Mthfr C677t ◽  
C677t Polymorphism ◽  
Phenotypic Effect ◽  
Riboflavin Deficiency ◽  
Mthfr C677t Polymorphism

Introduction: Emerging evidence links a functional polymorphism in the methylenetetrahydrofolate reductase (MTHFR) gene (rs1801133) with hypertension in adults. This variant reduces the affinity of MTHFR for its cofactor flavin-adenine dinucleotide (FAD) which is derived from riboflavin. Previous work has demonstrated a blood pressure (BP)-lowering effect of riboflavin in Irish adults with the MTHFR 677TT variant. We hypothesize that the almost-universal severe riboflavin deficiency seen in rural Gambia mimics the BP phenotypic effect of the TT variant and exacerbate the effect of the CT variant. We will test this in a randomised, placebo-controlled trial, whether intervention with riboflavin can decrease BP in adults in rural Gambia. Methods: This is a phase 2 recall-by-genotype randomised single-blind placebo-controlled riboflavin supplementation trial. We will use the Keneba biobank to recruit approximately 102 individuals aged between 18-70, previously genotyped for the MTHFR C677T polymorphism and identified as carrying the T allele; these individuals will be age- and sex-matched to a similar number of homozygotes for the C allele. The participants will be randomised to a 16-week supplementation trial of 5 mg/day riboflavin or placebo, supplied every 14 days. The primary outcome, BP, will be measured at baseline and at weeks 8 and 16. Blood samples, collected at baseline and week 16, will be analysed for riboflavin, homocysteine, red cell folate, cobalamin (vitamin B12) and pyridoxine (vitamin B6). Discussion: The study will evaluate the role of riboflavin supplementation in BP control within a population with high levels of riboflavin deficiency and will test a possible gene-nutrient interaction with the MTHFR C677T polymorphism. If improvements in BP are observed in this study, and proven in subsequent large-scale interventions, riboflavin could offer a cost-effective, safe and accessible option for the  prevention and control of hypertension in this population. Trial registration: ClinicalTrials.gov Identifier NCT03151096. Registered on 12 May 2017.

scholarly journals MTHFR Gene Polymorphism and Age of Onset of Schizophrenia and Bipolar Disorder

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Mohamed A. El-Hadidy ◽  
Hanaa M. Abdeen ◽  
Sherin M. Abd El-Aziz ◽  
Mohammad Al-Harrass
Keyword(s):  
Bipolar Disorder ◽  
Healthy Subjects ◽  
Methylenetetrahydrofolate Reductase ◽  
Age Of Onset ◽  
Age At Onset ◽  
Mthfr C677t ◽  
Control Group ◽  
C677t Polymorphism ◽  
Mthfr C677t Polymorphism ◽  
Mthfr Gene Polymorphism

Objective. Several studies with contradictory results from different cultures about association of methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism in schizophrenia and bipolar disorders. Little is known about this association in Arab culture and Egypt. So the present study aimed to assess the association of MTHFR C677T polymorphism in bipolar disorder (BD) and schizophrenia in comparison to control group. The association between MTHFR C677T polymorphism and the age at onset in schizophrenia or BD was also studied.Methods. Polymerase chain reaction and restriction fragment length polymorphism (PCR-RFLP) were used to examine the genotype and allele frequencies of MTHFR C677T polymorphism in 149 healthy subjects and 134 bipolar and 103 schizophrenia patients.Results. In BD and schizophrenia, there was a higher prevalence of MTHFR C677T polymorphism than healthy subjects. Earlier age at onset was found in patients with BD, carrying one copy of the T allele or CT genotypes but not in patients with schizophrenia.Conclusion. The present findings suggest that the MTHFR C677T polymorphisms are likely to be associated with the risk of developing BD and schizophrenia and influence the age at onset of BD but not the age at onset of schizophrenia.

Distribution of methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism in postmenopausal Indonesian women with osteoporosis – A preliminary study

2019 ◽  
Author(s):  
Widya Dwi Honesty Putri Soewarlan ◽  
Hedijanti Joenoes ◽  
Shafa Ahmad Bawazier ◽  
Dwi Anita Suryandari ◽  
Elza Ibrahim Auerkari
Keyword(s):  
Methylenetetrahydrofolate Reductase ◽  
Mthfr C677t ◽  
C677t Polymorphism ◽  
Mthfr C677t Polymorphism ◽  
Preliminary Study

Hyperhomocysteinemia and C677T Polymorphism of Methylenetetrahydrofolate Reductase Gene in Patients with Cardiovascular Disease

Pteridines ◽  
2010 ◽  
Vol 21 (1) ◽  
pp. 103-109
Author(s):  
Zahira Houcher ◽  
Bakhouche Houcher ◽  
Abderezak Touabti ◽  
Samia Begag ◽  
Ayşenur Öztürk ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Methylenetetrahydrofolate Reductase ◽  
Mthfr C677t ◽  
C677t Polymorphism ◽  
Old Patients ◽  
Mthfr C677t Polymorphism ◽  
Plasma Thcy ◽  
C677t Mutation ◽  
Total Homocysteine ◽  
And Gender

Abstract The aim of the present study was to explore the influence of age and gender, on the association between the methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism and plasma total homocysteine (tHcy) concentrations in patients with cardiovascular disease (CVD). Fasting tHcy and the MTHFR C677T mutation were evaluated in 98 patients with CVD, 46 were men and 52 women (aged 20-96 years). There was a significant elevation of plasma tHcy with age (<45 yr: 33.9 μmol/L vs. >75 yr: 43.6 μmol/L; p <0.01). The mean tHcy concentration increased significantly with age in men (<55 yr: 33.4 μmol/L vs. >55yr: 42.45 μmol/L; p 0.01). However, the plasma tHcy was not increased with older age in women. The frequency of the TT genotype was 19.6% in the younger patients group (>55 yr) compared with 4.7% in the older patients group (>55 yr; p <0.01). In conclusion, the data presented here are consistent with genetic factors that influence tHcy levels being more prominent in old patients (>55 yr). Then, the MTHFR mutation does not seem to be associated with either high tHcy or the occurrence of CVD.

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