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Coronary Artery Disease (CAD): An Overview with Scientific InsightsCoronary Artery Disease (CAD), often referred to as C-A-D, is a prevalent blood vessel disorder classified under the broader category of atherosclerosis. Atherosclerosis is a pathological process characterized by the hardening and narrowing of arteries due to the accumulation of atherosclerotic plaques. These plaques are composed of cholesterol, fatty substances, inflammatory cells, calcium, and fibrin, reducing blood flow to...
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Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
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低密度脂蛋白氧化增加和高密度脂蛋白抗氧化防御受损与失脂性肥胖小鼠的巨细胞回归和动脉样硬化增加有关:LCAT基因转移降低了动脉样硬化:LCAT基因转移降低了动脉样硬化.

Ann Mertens1, Peter Verhamme, John K Bielicki

  • 1Cardiovascular Research Unit at the Center for Experimental Surgery and Anesthesiology, Katholieke Universiteit Leuven, Campus Gasthuisberg, O&N, Herestraat 49, B-3000 Leuven, Belgium.

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概括

患有LDL受体缺乏的肥胖小鼠表现出氧化应激增加和HDL抗氧化防御受损,导致动脉样硬化. 恢复莱西丁:胆固醇酸转移酶 (LCAT) 活性降低了氧化应激和斑块形成.

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科学领域:

  • 心血管研究研究心血管研究
  • 代谢综合征是代谢综合征的一种.
  • 脂质代谢 脂质代谢是什么

背景情况:

  • 在人类中,与肥胖相关的脂质失调与增加的低密度脂蛋白 (LDL) 氧化相关.
  • 具有结合勒素和LDL受体缺乏症的小鼠存在肥胖症,严重的脂质失调症和胰岛素抵抗.

研究的目的:

  • 研究氧化阿波利波蛋白B-脂蛋白,高脂抗氧化能力和肥胖,失脂性小鼠的动脉样硬化发展之间的联系.
  • 评估增强HDL抗氧化防御的治疗潜力.

主要方法:

  • 使用LDL受体淘汰 (LDLR-/-),瘦素缺乏 (ob/ob) 和双突变 (LDLR-/-;ob/ob) 的小鼠养标准.
  • 评估脂质特征,氧化应激标志物 (针对malondialdehyde修饰的LDL的自身抗体) 和动脉样损伤大小 (大动脉根和胸腔腹腔大动脉).
  • 测量了HDL相关的偏氧酶和莱西丁:胆固醇酸转移酶 (LCAT) 活性;研究了腺病毒介导的LCAT基因转移的影响.

主要成果:

  • 与对照组相比,双变异小鼠的非高密度胆固醇,高密度胆固醇,甘油三和氧化应激标志物显著增加.
  • 动脉样硬化病变在双变异小鼠 (20%的大动脉区域) 中明显大于LDLR-/-小鼠 (3.5%).
  • 在双变异小鼠中降低氧酶和LCAT活性与增加的氧化应激和斑块体积相关;LCAT基因转移分别减少了40%和42%的自身抗体和斑块体积.

结论:

  • 在这些小鼠中,肥胖和脂质失调与增加的氧化压力和损害的HDL抗氧化防御 (降低氧酶和LCAT活性) 有关.
  • 过时的LCAT过度表达有效地减轻了氧化应激和减少了动脉样硬化,突出了其治疗前景.