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A Fluorescence-based Assay of Phospholipid Scramblase Activity
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在高胆固醇症小鼠中,氧化脂具有前炎性和前动脉性作用
Xuchu Que1, Ming-Yow Hung1,2,3, Calvin Yeang1
1Department of Medicine, University of California, San Diego, La Jolla, CA, USA.
Nature
|June 8, 2018
概括
氧化脂 (OxPL) 导致炎症和动脉样硬化. 一种新的抗体片段 (E06-scFv) 在小鼠中中和了OxPL,显著减少了动脉样硬化,大动脉膜疾病和全身炎症,同时延长了寿命.
科学领域:
- 心血管研究
- 免疫学
- 脂肪新陈代谢
背景情况:
- 氧化脂 (OxPL) 是动脉样硬化病变中发现的炎症媒介.
- 目前在体内中和OxPL的机制是有限的,因此它们的确切作用在很大程度上是未知的.
- 抗体E06与OxPL结合,抑制氧化低密度脂蛋白 (OxLDL) 的吸收和炎症.
研究的目的:
- 调查OxPL在动脉生成中的体内作用.
- 评估E06衍生抗体片段 (E06-scFv) 在降低动脉样硬化和相关炎症的治疗潜力.
主要方法:
- 在 Apoe 促成体下生成了表达 E06-scFv 的转基因 Ldlr-/小鼠.
- 进行高胆固醇饮食以诱发动脉硬化.
- 评估了动脉样硬化进展,大动脉病理,巨细胞炎症标志物,全身炎症和寿命.
主要成果:
- 在4-12个月内,E06-scFv表达显著降低了动脉样硬化57-28%.
- E06-scFv改善了主动脉的化和梯度.
- 观察到OxLDL摄入量降低,巨细胞炎症,血清粉样蛋白A和肝硬化.
- E06-scFv治疗延长了15个月的寿命.
结论:
- 氧化脂在体内起着显著的促动脉和促炎作用.
- E06-scFv有效中和了OxPL,抵消了OxLDL的吸收和炎症.
- 用像E06-scFv这样的疗法向OxPL可能对动脉样硬化,大动脉狭窄和全身炎症有好处.
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