Associations of plasma phospholipid cis-vaccenic acid with insulin resistance markers in non-diabetic men with hyperlipidemia

IF 4.6 2区医学 Q1 ENDOCRINOLOGY & METABOLISM Nutrition & Diabetes Pub Date : 2024-09-11 DOI:10.1038/s41387-024-00332-z

Jaroslav Macášek, Barbora Staňková, Aleš Žák, Markéta Růžičková, Radan Brůha, Simona Kutová, Marek Vecka, Miroslav Zeman

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Abstract

Background

The role of fatty acids (FA) in the pathogenesis of insulin resistance and hyperlipidemia is a subject of intensive research. Several recent works have suggested cis-vaccenic acid (cVA) in plasma lipid compartments, especially in plasma phospholipids (PL) or erythrocyte membranes, could be associated with markers of insulin sensitivity and cardiovascular health. Nevertheless, not all the results of research work testify to these beneficial effects of cVA. Therefore, we decided to investigate the relations of proportion of cVA in plasma PL to markers of insulin resistance in hyperlipidemic men.

Subjects

In 231 men (median age 50) with newly diagnosed hyperlipidemia, we analyzed basic clinical parameters together with FA composition of plasma PL and stratified them according to the content of cVA into upper quartile (Q4) and lower quartile (Q1) groups. We examined also small control group of 50 healthy men.

Results

The individuals in Q4 differed from Q1 by lower plasma insulin (p < 0.05), HOMA-IR values (p < 0.01), and apolipoprotein B concentrations (p < 0.001), but by the higher total level of nonesterified FA (p < 0.01). Both groups had similar age, anthropometrical, and other lipid parameters. In plasma PL, the Q4 group had lower content of the sum of n-6 polyunsaturated FA, due to decrease of γ-linolenic and dihomo-γ-linolenic acids, whereas the content of monounsaturated FA (mainly oleic and palmitoleic) was in Q4 higher.

Conclusions

Our results support hypothesis that plasma PL cVA could be associated with insulin sensitivity in men with hyperlipidemia.

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非糖尿病男性高脂血症患者血浆磷脂顺式-瓦钱子酸与胰岛素抵抗指标的关系

背景脂肪酸（FA）在胰岛素抵抗和高脂血症发病机制中的作用是一项深入研究的课题。最近的一些研究表明，血浆脂质区，尤其是血浆磷脂（PL）或红细胞膜中的顺式桦木酸（cVA）可能与胰岛素敏感性和心血管健康指标有关。然而，并非所有的研究结果都证明了 cVA 的这些有益作用。因此，我们决定研究血浆磷脂中 cVA 的比例与高脂血症男性胰岛素抵抗标志物的关系。在 231 名新诊断为高脂血症的男性（中位年龄 50 岁）中，我们分析了基本临床参数和血浆磷脂的 FA 组成，并根据 cVA 的含量将他们分为上四分位数组（Q4）和下四分位数组（Q1）。结果Q4组与Q1组的差异在于血浆胰岛素（p <0.05）、HOMA-IR值（p <0.01）和载脂蛋白B浓度（p <0.001）较低，但非酯化脂肪酸总水平较高（p <0.01）。两组的年龄、人体测量和其他血脂参数相似。在血浆PL中，Q4组的n-6多不饱和脂肪酸总和含量较低，这是因为γ-亚麻酸和二氢γ-亚麻酸含量减少，而Q4组的单不饱和脂肪酸（主要是油酸和棕榈油酸）含量较高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nutrition & Diabetes ENDOCRINOLOGY & METABOLISM-NUTRITION & DIETETICS

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Nutrition & Diabetes is a peer-reviewed, online, open access journal bringing to the fore outstanding research in the areas of nutrition and chronic disease, including diabetes, from the molecular to the population level.