血红氧酶-1 抑制了瓦塔纳贝遗传性高脂血症子的动脉生成
K Ishikawa1, D Sugawara, J Goto
1First Department of Internal Medicine, Fukushima Medical University, Fukushima, Japan.
Circulation
|October 10, 2001
概括
血红氧酶-1 (HO-1) 通过防止脂质过氧化,显示出抗原性质. 在子中抑制HO-1显著增加了动脉样硬化病变的形成,突出显示了它对心血管疾病的保护作用.
科学领域:
- 心血管研究研究心血管研究
- 氧化压力生物学 氧化压力生物学
- 动脉样硬化病原体的产生
背景情况:
- 血氧酶-1 (HO-1) 参与了对氧化应激的适应性反应.
- 它在体内预防动脉样硬化的作用尚未完全阐明.
- 瓦塔纳贝遗传性高脂血症 (WHHL) 子作为研究人类动脉样硬化的模型.
研究的目的:
- 为了研究HO-1在预防动脉新生中的活体功能.
- 确定HO-1抑制对WHHL子动脉样硬化病变的发展的影响.
主要方法:
- WHHL子被养1%的胆固醇饮食4周.
- 静脉注射Sn-protoporphyrin IX (HO-1抑制剂) 或盐水 (对照) 进行了.
- 动脉样硬化病变的量化包括面对苏丹IV染色 (EFA) 和亲密与中间比率 (I/M).
- 通过北方斑块和免疫组织化学分析HO-1表达.
主要成果:
- 抑制HO-1显著增加了动脉样硬化病变区域 (EFA,P<0.001) 和亲密到中间比率 (I/M,P<0.005).
- 在动脉样硬化病变内的巨细胞和泡细胞中证实了HO-1表达.
- 抑制HO-1导致血和组织脂质过氧化物水平升高.
- 血脂组成不受HO-1抑制的影响.
结论:
- 在体内,HO-1表现出抗动脉增生性质.
- 这些保护作用是通过预防脂质过氧化作用来实现的.
- HO-1在缓解动脉样硬化发展方面发挥着至关重要的作用.
相关概念视频
Regulation of Angiogenesis and Blood Supply
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
Atherosclerosis I: Introduction
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...
Atherosclerosis III: Management
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...


