Nat Commun:深海鱼油大作用,可降低全因死亡风险

2021-05-10 梅斯原创 MedSci原创

研究发现EPA、DHA和EPA + DHA与CVD死亡率呈负相关性,较高的EPA和DPA水平也与较低的癌症死亡风险相关。

深海鱼油是指从深海中鱼类动物体中提炼出来的不饱和脂肪成分,包括在生物体内有着十分重要的生理功能和保健作用的n-3多不饱和脂肪酸(n-3 PUFAs)家族,这个家族中的PUFAs包括18碳的植物来源的α-亚麻酸(ALA),以及二十碳五烯酸(EPA)、二十二碳五烯酸(DPA)和二十二碳六烯酸(DHA)。自从20世纪70年代,格陵兰岛爱斯基摩人报告了n-3 PUFAs家族与急性心肌梗塞风险呈负相关以来,许多研究都围绕n-3 PUFAs展开。

然而,到目前为止,还没有关于 n-3 PUFAs血液水平与全因死亡风险之间的关系的荟萃研究。

Harvard

近日,来自美国南达科他大学的研究团队汇集了脂肪酸和结果研究联盟(FORCE)中17个前瞻性队列研究的个人水平分析,以探索循环中的n-3 PUFAs水平(包括植物和海产品)与全因死亡率的关系,并且研究了与血管疾病、癌症和所有其他原因的死亡率的关系。

该研究从血液中生物标志物n-3 PUFAs水平的角度出发,利用大规模人群数据分析得出较高的n-3 PUFAs水平确实与较低的死亡风险有相关性。目前结果已在Nature Communications上。

研究人员对来自17项前瞻性队列研究中的共42466名个体数据进行汇总,统计了其血液中n-3 PUFAs、n-6 PUFAs(亚油酸和花生四烯酸)的循环测量水平及其他相关的协变量信息,并在长达16年的中位随访期间,统计参与者的身体状况及疾病相关死亡情况。

统计结果显示,基线时的42466名个体中,共有15720名(37%)在随访期间死亡,对其死亡原因进一步归类分析,发现约30%的死亡归因于CVD,30%归因于癌症,其余39%为其他原因。对血液中多不饱和脂肪酸浓度与死亡率间关联性的分析结果显示,EPA、DPA和DHA浓度较高以及EPA + DHA水平较高可使全因死亡率降低9%至13%,其中EPA与死亡率的关系在较低水平时最为明显。相反,α-亚麻酸(ALA)血液水平与全因死亡率没有显著的相关性。

对不同类型死亡率的循环n-3 PUFAs生物标志物的荟萃分析

不同种n-3 PUFA水平与全因死亡率的关联

进一步对血液中多不饱和脂肪酸水平能否影响特定原因死亡率研究,研究发现,EPA、DHA和EPA + DHA与CVD死亡率呈负相关性,较高的EPA和DPA水平也与较低的癌症死亡风险相关,而这几种n-3 PUFAs水平均与其他原因死亡负相关。同样,也没有发现ALA与任何特定原因的死亡率有明显的关联。

原始出处:

William S. Harris, Nathan L. Tintle, Fumiaki Imamura, Frank Qian, Andres V. Ardisson Korat,et al.Blood n-3 fatty acid levels and total and cause-specific mortality from 17 prospective studies. Nat Commun DOI: 10.1038/s41467-021-22370-2

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    2021-05-14 liye789132251
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    2022-01-02 liuli5079
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