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A Method to Study the C924T Polymorphism of the Thromboxane A2 Receptor Gene
Published on: April 1, 2019
Modifiable Correlates With Systemic Thromboxane Generation and Association With Cardiovascular Outcomes: Results From
Frank Qian1,2, Priya Gajjar1, Brenton Prescott2,3
1Section of Cardiovascular Medicine, Department of Medicine, Boston Medical Center and Boston University Chobanian & Avedisian School of Medicine, MA (F.Q., P.G., M.N.).
Improving lifestyle factors like diet and exercise can lower thromboxane A2 generation, a risk marker for cardiovascular disease (CVD). These lifestyle changes, assessed by the Life's Essential 8 (LE8) score, also reduce heart failure and CVD risk, particularly in individuals with high thromboxane A2 levels.
Area of Science:
- Cardiovascular Disease Research
- Metabolic Health
- Biomarker Analysis
Background:
- Systemic thromboxane A2 (TXA2) generation is linked to cardiovascular disease (CVD) risk.
- Understanding modifiable factors, including non-platelet TXA2 sources, is crucial for CVD prevention.
Purpose of the Study:
- To investigate the association between modifiable lifestyle factors, omega-3/omega-6 fatty acids, and systemic TXA2 generation.
- To examine how TXA2 generation influences the relationship between lifestyle factors and CVD/heart failure risk.
Main Methods:
- Analysis of urinary TXB2 metabolites normalized for renal function (TXB2-M-GFR) in 2655 Framingham Heart Study participants.
- Assessment of Life's Essential 8 (LE8) score, erythrocyte fatty acid levels, vascular stiffness, and adiposity.
- Linear models were used to relate these factors to TXB2-M-GFR, adjusting for covariates; CVD and heart failure events were tracked.
Main Results:
- Higher LE8 scores and favorable individual LE8 components (diet, activity, glucose, blood pressure, non-smoking) were associated with lower TXB2-M-GFR.
- Elevated omega-3 fatty acids and lower arachidonic acid correlated with reduced TXB2-M-GFR.
- Increased TXB2-M-GFR was linked to greater adiposity (waist circumference, visceral adipose tissue, hepatic steatosis) and vascular stiffness.
- High TXB2-M-GFR combined with low LE8 significantly increased heart failure (HR 5.07) and CVD (HR 2.74) risk over 12.9 years.
Conclusions:
- Lifestyle factors, including diet and physical activity, significantly influence systemic TXA2 generation.
- TXA2 generation appears to mediate the impact of lifestyle on CVD and heart failure risk.
- Optimizing LE8 score and fatty acid profiles may offer therapeutic targets for reducing CVD risk.
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