alexa trans-Palmitoleic acid, other dairy fat biomarkers, and incident diabetes: the Multi-Ethnic Study of Atherosclerosis (MESA).
Healthcare

Healthcare

Primary Healthcare: Open Access

Author(s): Mozaffarian D, de Oliveira Otto MC, Lemaitre RN, Fretts AM, Hotamisligil G,

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Abstract BACKGROUND: Dairy consumption is linked to a lower risk of type 2 diabetes, but constituents responsible for this relation are not established. Emerging evidence suggests that trans-palmitoleate (trans 16:1n-7), a fatty acid in dairy and also partially hydrogenated oils, may be associated with a more favorable metabolic profile and less incident diabetes. OBJECTIVE: We investigated the association of trans-palmitoleate with metabolic risk and incident diabetes in a multiethnic US cohort. DESIGN: Phospholipid fatty acids and metabolic risk factors were measured in 2000-2002 among 2617 adults in the Multi-Ethnic Study of Atherosclerosis (MESA), a cohort of white, black, Hispanic, and Chinese Americans. In 2281 participants free of baseline diabetes, we also prospectively assessed the risk of new-onset diabetes (205 cases) from baseline to 2005-2007. RESULTS: trans-Palmitoleate concentrations correlated positively with self-reported consumption of whole-fat dairy, butter, margarine, and baked desserts and with other circulating biomarkers of both dairy fat and partially hydrogenated oil consumption, which suggested mixed dietary sources. After multivariable adjustment, trans-palmitoleate concentrations were associated with higher LDL cholesterol (quintile 5 compared with quintile 1: +6.4\%; P-trend = 0.005), lower triglycerides (-19.1\%; P-trend < 0.001), lower fasting insulin (-9.1\%; P-trend = 0.002), and lower systolic blood pressure (-2.4 mm Hg; P-trend = 0.01). In prospective analyses, trans-palmitoleate was independently associated with lower incident diabetes (P-trend = 0.02), including a 48\% lower risk in quintile 5 compared with quintile 1 (HR: 0.52; 95\% CI: 0.32, 0.85). All findings were similar between men and women and between different race-ethnic subgroups. CONCLUSIONS: Circulating trans-palmitoleate is associated with higher LDL cholesterol but also with lower triglycerides, fasting insulin, blood pressure, and incident diabetes in a multiethnic US cohort. Our findings support the need for further experimental and dietary intervention studies that target circulating trans-palmitoleate. The MESA trial was registered at clinicaltrials.gov as NCT00005487.
This article was published in Am J Clin Nutr and referenced in Primary Healthcare: Open Access

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