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Updated: Mar 12, 2026
Author Spotlight: A Pharmacodissection Approach to Uncover Mechanisms in Cardiovascular Disease Risk Populations
Published on: July 21, 2023
Novel Approaches to Investigate One-Carbon Metabolism and Related B-Vitamins in Blood Pressure
Amy McMahon1, Helene McNulty2, Catherine F Hughes3
1Northern Ireland Centre for Food and Health, Ulster University, Coleraine BT52 1SA, UK. McMahon-A13@email.ulster.ac.uk.
Insights
Methylenetetrahydrofolate reductase (MTHFR) gene variants influence blood pressure. Riboflavin supplementation may help manage hypertension in individuals with the MTHFR 677TT genotype, potentially via nitric oxide pathways.
Area of Science:
- Cardiovascular Science
- Nutritional Biochemistry
- Genetics
Background:
- Hypertension is a leading cause of preventable death, linked to heart disease and stroke.
- A common MTHFR gene polymorphism (677C→T) is associated with elevated blood pressure.
- Riboflavin, a B-vitamin, may modulate blood pressure in individuals with the MTHFR 677TT genotype.
Purpose of the Study:
- To review evidence linking MTHFR gene polymorphism and gene-nutrient interactions with hypertension.
- To explore potential mechanisms, including the role of 5-methyltetrahydrofolate and nitric oxide.
- To examine the utility of ambulatory blood pressure monitoring in nutritional research.
Main Methods:
- Literature review of studies on MTHFR polymorphism, riboflavin, and hypertension.
- Analysis of proposed biochemical pathways involving MTHFR, folate metabolism, and nitric oxide synthase (eNOS).
- Discussion of ambulatory blood pressure monitoring (ABPM) in assessing circadian blood pressure patterns.
Main Results:
- The MTHFR 677TT genotype is associated with increased blood pressure.
- Riboflavin supplementation shows potential to lower blood pressure in individuals with the 677TT genotype.
- 5-methyltetrahydrofolate may positively modulate eNOS activity, increasing nitric oxide production.
Conclusions:
- The MTHFR 677C→T polymorphism and its interaction with riboflavin represent a significant gene-nutrient factor in hypertension.
- Understanding these mechanisms may lead to targeted nutritional interventions for hypertension management.
- ABPM is crucial for identifying blood pressure variations and assessing treatment efficacy in nutritional studies.
Abstract:
Hypertension, a major risk factor for heart disease and stroke, is the world's leading cause of preventable, premature death. A common polymorphism (677C→T) in the gene encoding the folate metabolizing enzyme methylenetetrahydrofolate reductase (MTHFR) is associated with increased blood pressure, and there is accumulating evidence demonstrating that this phenotype can be modulated, specifically in individuals with the MTHFR 677TT genotype, by the B-vitamin riboflavin, an essential co-factor for MTHFR. The underlying mechanism that links this polymorphism, and the related gene-nutrient interaction, with hypertension is currently unknown. Previous research has shown that 5-methyltetrahydrofolate, the product of the reaction catalysed by MTHFR, appears to be a positive allosteric modulator of endothelial nitric oxide synthase (eNOS) and may thus increase the production of nitric oxide, a potent vasodilator. Blood pressure follows a circadian pattern, peaking shortly after wakening and falling during the night, a phenomenon known as 'dipping'. Any deviation from this pattern, which can only be identified using ambulatory blood pressure monitoring (ABPM), has been associated with increased cardiovascular disease (CVD) risk. This review will consider the evidence linking this polymorphism and novel gene-nutrient interaction with hypertension and the potential mechanisms that might be involved. The role of ABPM in B-vitamin research and in nutrition research generally will also be reviewed.
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