在心血管疾病患者中发现的 cholesteryl hemiazelate 在体外和体外引起炎症
Neuza Domingues1, Joana Gaifem2, Rune Matthiesen1
1iNOVA4Health, NOVA Medical School, Faculdade de Ciências Médicas, (NMS, FCM), Universidade Nova de Lisboa, Lisboa, Portugal.
Journal of lipid research
|July 23, 2023
概括
胆固醇半酸盐 (ChA) 是胆固醇的氧化产物,促进炎症和动脉样硬化. 这项研究确定了患者的ChA,并证明了它对免疫细胞和斑马鱼模型的炎症促进作用.
科学领域:
- 心血管研究研究心血管研究
- 脂质代谢 脂质代谢是什么
- 免疫学 免疫学 免疫学
背景情况:
- 动脉内心的LDL中多不和脂肪酸 (PUFA) 的氧化在动脉硬化中至关重要.
- 虽然已经对胆固醇的氧化PUFA-进行了研究,但胆固醇半 (ChEs) 的作用,即它们的氧化最终产品,仍然在很大程度上未知.
研究的目的:
- 为了研究胆固醇半 (ChEs) 在动脉样硬化中的作用.
- 在人类心血管疾病 (CVD) 样本中识别和描述ChEs.
- 为了确定ChEs的炎症性和益风性特性,特别是胆固醇半酸盐 (ChA).
主要方法:
- 脂管学分析用于识别和量化血和内关节切除样本中的ChEs.
- 在体外研究中,暴露人体单细胞,巨细胞和中性粒细胞对ChA.
- 在使用斑马鱼幼虫的体内研究中,食了富含CHA的饮食.
主要成果:
- 在心血管疾病患者的血中确定了两种ChE类型,在人体内关节切除标本中确定了四种.
- 胆固醇半酸盐 (ChA) 是最常见的CHE.
- ChA诱导人体免疫细胞的炎症反应,增加促炎细胞因子 (IL-1β,IL-6) 和改变表面标记物.
- 在斑马鱼中,ChA触发了免疫细胞的积累,脂质沉积和寿命的缩短,这取决于酶1和甲素B.
结论:
- 胆固醇半酸盐 (ChA) 作为一种与内源性损伤相关的分子模式.
- ChA具有炎症和动脉增生性质,有助于动脉样硬化发展.
- 这些发现凸显了CHEs作为理解和治疗心血管疾病的新目标.
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