与其他ApoB颗粒相比,Eicosapentaenoic acid (EPA) 限制了脂蛋白的更快氧化
Samuel C R Sherratt1,2, Peter Libby3, Richard L Dunbar4
1Mount Sinai Fuster Heart Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Cardiovascular research
|August 25, 2025
概括
血脂蛋白 (Lp) 的升高会迅速氧化,从而增加心血管风险. 欧米茄3脂肪酸 (EPA) 有效地抑制了Lp (a) 的氧化和相关的细胞应激.
科学领域:
- 心血管科学
- 脂肪新陈代谢
- 氧化压力生物学
背景情况:
- 升高的脂蛋白 (Lp) 是心血管疾病的重要危险因素.
- 富含氧化脂,可能导致进一步的脂质氧化.
- 乙酸 (EPA) 是一种omega-3脂肪酸,具有抗氧化作用.
研究的目的:
- 与其他脂蛋白相比,研究Lp(a) 丰富的血是否经历加速氧化.
- 要确定EPA是否比其他药物更有效地限制Lp(a) 丰富血的氧化.
- 评估EPA对受氧化Lp (a) 的内皮细胞应激反应的影响.
主要方法:
- 用小密度的LDL (sdLDL) 和VLDL丰富血.
- 用EPA或其他药物化脂蛋白分片,然后用铜诱导氧化.
- 通过malondialdehyde形成监测氧化.
- 暴露于有或没有EPA的氧化Lp的人类静脉内皮细胞 (HUVEC) 的蛋白质组分析.
主要成果:
- 富含Lp (a) 的血具有最高的氧化脂含量,并且经历了最快的氧化.
- 与不太和脂肪酸或降脂剂不同,EPA显著减弱了Lp (a) 丰富血的氧化.
- EPA对Lp的抗氧化作用减轻了HUVEC中与炎症和细胞压力相关的蛋白质表达变化.
结论:
- 与其他含有ApoB的脂蛋白相比,富含Lp (a) 的血更容易氧化.
- EPA有效地抑制Lp (a) 氧化和随后的内皮细胞炎症反应.
- EPA对Lp (a) 的抗氧化作用可能是其降低心血管风险的基础.
相关概念视频
Atherosclerosis III: Management
33
Management of atherosclerosis involves an integrated strategy encompassing pharmacological treatment, surgical interventions, lifestyle changes, and nutrition therapy to address the multifactorial nature of the disease.Pharmacological TherapyA cornerstone of atherosclerosis management is the use of pharmacological agents. Statins, such as atorvastatin, are pivotal in inhibiting HMG-CoA reductase, an enzyme that catalyzes an initial step in cholesterol synthesis in the liver. This reduction in...
33
Lipid-derived Compounds in the Human Body
5.2K
Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin,...
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin,...
5.2K
Lipids: Dietary Sources and Requirements
1.1K
Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ...
1.1K
Atherosclerosis I: Introduction
77
Atherosclerosis is a progressive disorder characterized by the buildup of plaques on the arterial inner wall, causing them to narrow and harden over time. These plaques comprise lipids, calcium, blood components, carbohydrates, and fibrous tissue. The process primarily affects the intima of large and medium-sized arteries, reducing blood flow in any artery.Etiology and risk factorsThe cause of atherosclerosis is multifactorial, involving a complex interplay among endothelial injury, lipid...
77
Lipid Absorption
723
Dietary triglycerides from chyme in the duodenum are mixed with bile salts produced by the liver to emulsify fats. As a result, large droplets are broken down into smaller ones, increasing the surface area for enzymatic action. Once emulsified, pancreatic lipases hydrolyze the triglycerides into free fatty acids and monoglycerides.
These breakdown products bind with bile salts and lecithin to form micelles, which quickly pass between microvilli to come in close contact with the apical...
These breakdown products bind with bile salts and lecithin to form micelles, which quickly pass between microvilli to come in close contact with the apical...
723
Lipid-Lowering Drugs: Statins and Miscellaneous Agents
869
Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
869


