基于ABCA1和apoA-I的12-基酸酸排放调节了巨细胞的炎症信号传递
Brian A Harsch1, Kamil Borkowski1,2, Rachel E Walker1
1Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA.
bioRxiv : the preprint server for biology
|July 19, 2024
概括
高密度脂蛋白 (HDL) 通过ABCA1和apoA-I从细胞中去除炎症性氧酸酸 (HETEs),抑制炎症. 这种新发现的HDL功能可能解释其抗炎性质,并影响代谢疾病.
科学领域:
- 脂质代谢 脂质代谢 是一种
- 免疫学 免疫学 免疫学
- 心血管研究的心血管研究.
背景情况:
- 异常高密度脂蛋白 (HDL) 功能与炎症有关.
- HDL在运输促/抗炎性脂质,特别是像基酸酸 (HETEs) 这样的氧利平的作用尚不清楚.
- HETEs是协调炎症反应的关键调解者.
研究的目的:
- 为了调查ABCA1-apoA-I-依赖的HDL流量调节细胞内HETE可用性的假设.
- 在对内毒素刺激的反应中,描述HETE形成和流入HDL的特征.
- 为了确定HDL是否可以通过管理细胞内HETE含量来抑制炎症反应.
主要方法:
- 在用d8-阿拉基酸预装的内毒素刺激的RAW-264.7巨细胞中利用了隔间标记器建模.
- 在非化 (NE) 和化 (Es) 池之间量化HETE的形成和转移.
- 在apoA-I和ABCA1.1存在或不存在的情况下,评估HETE流入HDL.
- 在人体内测量HDL12-HETE积累在静脉注射脂多糖化物挑战后.
主要成果:
- 细胞NE12-HETE与MCP-1分泌正相关.
- 从NE转移到Es池的HETE转移和随后的流入媒体取决于ABCA1和apoA-I.
- 激发的HETE流量明显超过了阿拉基酸盐的流量.
- 在人类中,内毒素挑战导致12-HETE在168小时内在HDL中积累.
结论:
- 高脂通过通过apOA-I/ABCA1依赖机制调节细胞内HETE含量,积极抑制巨细胞中的炎症反应.
- 这种新发现的HDL属性,涉及HETEs的流出,可能有助于HDL的抗炎作用.
- 这些发现表明,对于理解在代谢疾病和其他炎症病理中的脂蛋白相互作用的潜在影响.
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