Premium
Dietary Palmitoleic Acid Attenuates Atherosclerosis Progression and Hyperlipidemia in Low‐Density Lipoprotein Receptor‐Deficient Mice
Author(s) -
Yang ZhiHong,
Pryor Milton,
Noguchi Audrey,
Sampson Maureen,
Johnson Brittany,
Pryor Matthew,
Donkor Kwame,
Amar Marcelo,
Remaley Alan T.
Publication year - 2019
Publication title -
molecular nutrition and food research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.495
H-Index - 131
eISSN - 1613-4133
pISSN - 1613-4125
DOI - 10.1002/mnfr.201900120
Subject(s) - medicine , endocrinology , lipid metabolism , hyperlipidemia , chemistry , lipogenesis , ldl receptor , apolipoprotein b , cholesterol , palmitoleic acid , oleic acid , cd36 , lipoprotein , metabolism , fatty acid , receptor , biology , biochemistry , diabetes mellitus , linoleic acid
Scope Palmitoleic acid (palmitoleate; C16:1 n‐7), an omega‐7 monounsaturated fatty acid (MUFA) found in plants and marine sources, has been shown to favorably modulate lipid and glucose metabolism. However, its impact on atherosclerosis has not been examined in detail. Methods and Results LDL receptor knock out (LDLR‐KO) mice are fed a Western diet supplemented with 5% (w/w) palmitoleate concentrate, oleic‐rich olive oil, or none (control) for 12 weeks. Dietary palmitoleate increases hepatic C16:1 levels, improves plasma and hepatic lipid/lipoprotein profiles (≈40% decrease in triglycerides), and reduces the atherosclerotic plaque area by ≈45% compared with control or olive oil group ( p < 0.05). These favorable changes are accompanied by the downregulation of key genes, such as Srebp1c , Scd1 , Il‐1β , and Tnfα . ApoB‐depleted plasma from mice fed palmitoleate has increased cholesterol efflux capacity by 20% from ABCA1‐expressing cells ( p < 0.05). A beneficial effect of palmitoleate on glucose metabolism (54% decreased in HOMA‐IR, p < 0.05) is also observed. Conclusions Dietary‐supplemented palmitoleate reduces atherosclerosis development in LDLR‐KO mice, and is associated with improvement of lipid and glucose metabolism and favorable changes in regulatory genes involved in lipogenesis and inflammation. These findings imply the potential role of dietary palmitoleate in the prevention of cardiovascular disease and diet‐induced metabolic disorders.