Dataset Information

High habitual dietary alpha-linolenic acid intake is associated with decreased plasma soluble interleukin-6 receptor concentrations in male twins.

ABSTRACT:

Background

alpha-Linolenic acid (ALA) is associated with a low risk of cardiovascular disease; however, the underlying mechanism is not completely known.

Objective

The objective was to examine whether habitual dietary ALA intake is associated with plasma concentrations of inflammatory biomarkers after control for shared genetic and common environmental factors.

Design

We cross-sectionally studied 353 middle-aged male twins. Habitual diet was assessed with the Willett food-frequency questionnaire. Fasting plasma concentrations of interleukin-6 (IL-6) and its soluble receptor (sIL-6R), high-sensitivity C-reactive protein (hsCRP), and tumor necrosis factor-alpha (TNF-alpha) were measured. Linear mixed-effect regression analysis was used to partition the overall association into within- and between-pair associations.

Results

A 1-g increment in habitual dietary ALA intake was associated with 11.0% lower concentrations of sIL-6R (P = 0.004) but not of IL-6 (P = 0.31), TNF-alpha (P = 0.16), or hsCRP (P = 0.36) after adjustment for energy intake, nutritional factors, known cardiovascular disease risk factors, and medications. After further control for shared genetic and common environmental factors by comparison of brothers within a twin pair, a twin with a 1-g higher ALA intake was likely to have 10.9% (95% CI: 3.7%, 17.6%; P = 0.004) lower sIL-6R concentrations than his co-twin with a low intake, whereas ALA intake was not significantly associated with plasma concentrations of IL-6, TNF-alpha, or hsCRP. These results were validated by using 1000 bootstrap samples.

Conclusions

Habitual dietary ALA intake is inversely associated with plasma sIL-6R concentrations independent of shared genetic and common environmental influences. Lowering sIL-6R may be a mechanism underlying the cardioprotective properties of habitual dietary ALA. This study was registered at clinicaltrials.gov as NCT00017836.

SUBMITTER: Dai J

PROVIDER: S-EPMC2884325 | biostudies-literature | 2010 Jul

REPOSITORIES: biostudies-literature

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Publications

High habitual dietary alpha-linolenic acid intake is associated with decreased plasma soluble interleukin-6 receptor concentrations in male twins.

Dai Jun J Ziegler Thomas R TR Bostick Roberd M RM Manatunga Amita K AK Jones Dean P DP Goldberg Jack J Miller Andrew A Vogt Gerald G Wilson Peter W PW Jones Linda L Shallenberger Lucy L Vaccarino Viola V

The American journal of clinical nutrition 20100512 1

<h4>Background</h4>alpha-Linolenic acid (ALA) is associated with a low risk of cardiovascular disease; however, the underlying mechanism is not completely known.<h4>Objective</h4>The objective was to examine whether habitual dietary ALA intake is associated with plasma concentrations of inflammatory biomarkers after control for shared genetic and common environmental factors.<h4>Design</h4>We cross-sectionally studied 353 middle-aged male twins. Habitual diet was assessed with the Willett food-f ...[more]

PMID: 20463041

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Dataset Information

High habitual dietary alpha-linolenic acid intake is associated with decreased plasma soluble interleukin-6 receptor concentrations in male twins.

Background

Objective

Design

Results

Conclusions

Publications

High habitual dietary alpha-linolenic acid intake is associated with decreased plasma soluble interleukin-6 receptor concentrations in male twins.

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