Cited by 314Alcohol Consumption and Health EffectsGenetic Associations and EpidemiologyBlood Pressure and Hypertension Studies

Alcohol Intake and Blood Pressure: A Systematic Review Implementing a Mendelian Randomization Approach

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Chen, Lina, Davey Smith, George, Harbord, Roger M, Lewis, Sarah J·2008·PLoS Medicine

Abstract

BACKGROUND: Alcohol has been reported to be a common and modifiable risk factor for hypertension. However, observational studies are subject to confounding by other behavioural and sociodemographic factors, while clinical trials are difficult to implement and have limited follow-up time. Mendelian randomization can provide robust evidence on the nature of this association by use of a common polymorphism in aldehyde dehydrogenase 2 (ALDH2) as a surrogate for measuring alcohol consumption. ALDH2 encodes a major enzyme involved in alcohol metabolism. Individuals homozygous for the null variant (*2*2) experience adverse symptoms when drinking alcohol and consequently drink considerably less alcohol than wild-type homozygotes (*1*1) or heterozygotes. We hypothesise that this polymorphism may influence the risk of hypertension by affecting alcohol drinking behaviour. METHODS AND FINDINGS: We carried out fixed effect meta-analyses of the ALDH2 genotype with blood pressure (five studies, n = 7,658) and hypertension (three studies, n = 4,219) using studies identified via systematic review. In males, we obtained an overall odds ratio of 2.42 (95% confidence interval [CI] 1.66-3.55, p = 4.8 x 10(-6)) for hypertension comparing *1*1 with *2*2 homozygotes and an odds ratio of 1.72 (95% CI 1.17-2.52, p = 0.006) comparing heterozygotes (surrogate for moderate drinkers) with *2*2 homozygotes. Systolic blood pressure was 7.44 mmHg (95% CI 5.39-9.49, p = 1.1 x 10(-12)) greater among *1*1 than among *2*2 homozygotes, and 4.24 mmHg (95% CI 2.18-6.31, p = 0.00005) greater among heterozygotes than among *2*2 homozygotes. CONCLUSIONS: These findings support the hypothesis that alcohol intake has a marked effect on blood pressure and the risk of hypertension.

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  • The dose-response association between alcohol and blood pressure may differ between men (linear) and women (J shaped) and can be modified by metabolic genes.

    “The dose-response association may differ between men (linear) and women (J shaped)164 and can be modified by metabolic genes.163”
  • Alcohol intake has been linked to increases in blood pressure and the risk for developing hypertension.

    “Alcohol intake has been linked to increases in BP and the risk for developing hypertension.162–164”
  • A DASH-style eating pattern, alcohol restriction to <10 g/d (women) and <20 g/d (men), and a variety of other dietary modifications can each yield significant reductions in BP among patients with hypertension.

    “A DASH-style eating pattern,174,175 alcohol restriction to <10 g/d (women) and <20 g/d (men),162–165 and a variety of other dietary modifications174 can each yield significant reductions in BP among patients with hypertension.”
  • If the multivariable Mendelian randomization conditions are met, the estimates obtained will be a direct effect of each exposure included on the outcome, given the other exposures included in the estimation.

    “If the above conditions are met, the estimates obtained from multivariable MR will be a direct effect of each exposure included on the outcome, given the other exposures included in the estimation.74”

    From Mendelian randomization (2022) · cites this paper as [74]

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Authors
Chen, L., Davey Smith, G., Harbord, R. M., & Lewis, S. J.
Affiliations
University of Bristol (GB)
Corresponding author
Lewis, Sarah J
Venue
PLoS Medicine
Published
2008-03-04
Volume
5
Issue
3
Pages
e52
ISSN
  • 1549-1277 (ISSN-L)
  • 1549-1676
OpenAlex
W2097040757
Cited by
314
References
32
Citations by year
2026: 5 · 2025: 9 · 2024: 18 · 2023: 13 · 2022: 15 · 2021: 17 · 2020: 27 · 2019: 17 · 2018: 21 · 2017: 16 · 2016: 19 · 2015: 15 · 2014: 20 · 2013: 22 · 2012: 25
FWCI
2.15
Type
journal article
Language
en
Open access
Locations
  • PLoS Medicine (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (publishedVersion)
  • Bristol Research (University of Bristol) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Medical Research Council
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Alcohol Consumption and Health Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
Keywords
alcohol consumption, blood pressure, hypertension, ALDH2, ALDH2 polymorphism, genetic susceptibility, alcohol metabolism, systolic blood pressure
MeSH terms
Alcohol Dehydrogenase, Alcohol Drinking, Blood Pressure, Humans, Hypertension, Male, Genetic Predisposition to Disease

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