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Am J Clin Nutr. 2016 Apr;103(4):1105-10. doi: 10.3945/ajcn.115.118935. Epub 2016 Feb 24.

Adipose tissue α-linolenic acid is inversely associated with insulin resistance in adults.

Author information

1
Center for Nutrition, Healthy Lifestyle and Disease Prevention, School of Public Health, Loma Linda University, Loma Linda, CA cheskey@llu.edu.
2
Center for Nutrition, Healthy Lifestyle and Disease Prevention, School of Public Health, Loma Linda University, Loma Linda, CA.

Abstract

BACKGROUND:

There is emerging evidence of the beneficial effects of n-3 (ω-3) fatty acids (FAs) on cardiometabolic risk factors. Nevertheless, not much is known about the association between adipose tissue α-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) and insulin resistance.

OBJECTIVE:

We determined the association between adipose tissue n-3 FAs (total n-3 FAs, ALA, and EPA plus DHA) and insulin resistance in healthy adults.

DESIGN:

In this cross-sectional study, multivariable analyses were used to assess the association between adipose tissue FAs (ALA, EPA plus DHA, and total n-3 FAs) and the homeostasis model assessment of insulin resistance (HOMA-IR) in a subset of adult participants (n= 716; mean age: 58 y) from the Adventist Health Study-2 (AHS-2) cohort.

RESULTS:

Compared with the lowest tertile, the third tertile (β = -0.13; 95% CI: -0.24, -0.01) of adipose tissue ALA was inversely associated with the HOMA-IR. When stratified by waist circumference, ALA continued to be inversely associated [third tertile: β = -0.17 (95% CI: -0.31, -0.02)] with the HOMA-IR in subjects with a waist circumference ≤88 cm in women or ≤102 cm in men but not in those with a larger waist circumference. No significant association was noted between adipose tissue EPA plus DHA and HOMA-IR.

CONCLUSIONS:

Higher adipose tissue ALA was inversely associated with insulin resistance in this cohort of healthy adult men and women. This finding appears to be more pronounced in individuals with a normal waist circumference.

KEYWORDS:

adiposity; biomarker; insulin resistance; n–3 fatty acids; waist circumference

PMID:
26912497
PMCID:
PMC4807701
DOI:
10.3945/ajcn.115.118935
[Indexed for MEDLINE]
Free PMC Article

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