ArticleAlcohol, clinical & experimental research2025
Alcohol consumption and immune cell profiles: Insights from the Framingham Heart Study.
Article in Alcohol, clinical & experimental research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundAlcohol consumption affects immune function, with excessive intake linked to immune suppression and inflammation. However, its impact on immune cell phenotypes remains unclear. This study investigates the association between alcohol consumption and immune cell profiles in a well-characterized Framingham Heart Study (FHS) cohort while examining sex-specific differences in alcohol-immune cell associations.
methodsWe analyzed data from 996 participants of the FHS Offspring cohort who underwent immune cell phenotyping and completed an alcohol questionnaire during Exam 7 (1998-2001). Alcohol intake was categorized as abstainer, moderate, at-risk, or heavy drinking. Linear mixed-effects models examined associations between alcohol intake and 15 immune cell phenotypes, adjusting for age, sex, and Cytomegalovirus (CMV) (Model 1) and additional covariates (Model 2). False discovery rate (FDR) correction was applied for multiple testing.
resultsThe CD4+ Tn/Tm ratio showed a significant nonlinear relationship with alcohol categories in Model 1 (p = 0.002, FDR = 0.03), with higher ratios in moderate (β = 0.26) and at-risk drinkers (β = 0.26) compared with abstainers; effects were smaller in Model 2 (β = 0.23 and β = 0.23, respectively). Sex-stratified analyses revealed that among males, alcohol consumption was associated with several immune cell phenotypes in Model 1, and with CD8+ Tn/Tm ratio in Model 2 (p = 0.0001, FDR = 0.002), where moderate drinking was associated with higher CD8+ Tn/Tm ratio compared with abstainers (β = 0.29). Among male drinkers, consumption level was also associated with CD8+ Tn/Tm ratio in both models: at-risk and heavy consumption showed significantly lower CD8+ Tn/Tm ratio compared with moderate drinkers (β = -0.43 and β = -0.46, respectively, in Model 2).
conclusionsAlcohol consumption exhibits a nonlinear relationship with certain immune cells, with moderate intake potentially benefiting immunity, while higher consumption may compromise immune homeostasis. Given the study's cross-sectional design, causality cannot be inferred; nonetheless, our sex-specific, dose-dependent findings merit confirmation in longitudinal cohorts.
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