脂蛋白 (a) 在动脉样硬化心血管疾病中整合单细胞介导的血栓形成和炎症
Robert S Rosenson1, Ashley M Tate2, Olga G Grushko2
1Metabolism and Lipids Program, Mount Sinai Fuster Heart Hospital, Icahn School of Medicine at Mount Sinai, New York, USA.
Journal of lipid research
|May 7, 2025
概括
升高的脂蛋白 (a) [Lp(a) ]通过激活单细胞,放大动脉样硬化心血管疾病的风险. 这项研究揭示了Lp(a) 通过Toll-like受体2和NFκB信号触发炎症和血栓形成,突出显示了一种新的免疫血栓机制.
科学领域:
- 心血管生物学 心血管生物学
- 免疫学 免疫学 免疫学
- 分子医学是分子医学.
背景情况:
- 升高的脂蛋白 (a) [Lp(a) ]是动脉样硬化心血管疾病 (ASCVD) 的因果风险因素.
- Lp(a) 通过胆固醇运输,炎症和血栓形成,与ASCVD的病原发生有关.
- 整合这些途径的精确机制仍然不完全理解.
研究的目的:
- 在ASCVD患者中阐明将Lp(a) 与单细胞驱动的炎症和血栓形成的分子机制.
- 定义与高Lp (a) 水平相关的免疫细胞和分子表型.
主要方法:
- 系统生物学方法包括蛋白质组学,转录组学和质量细胞计学.
- 对64名稳定的ASCVD患者的分析,按高和低Lp (a) 水平分层.
- 试验室内单细胞激活检测用于研究Lp (a) 信号通路.
主要成果:
- 患有高Lp的患者表现出循环炎症标志物 (CCL28,IL-17D) 和血管功能障碍标志物 (组织因子[TF]) 的升高.
- 来自高Lp(a) 患者的CD14+单细胞显示出基线和压力诱导TF表达的增加.
- Lp(a) 通过托尔类受体2 (TLR2) 和核因子kappa B (NFκB) 信号传递直接激活单细胞,调节TF诱导和活性.
结论:
- 这项研究确立了Lp(a) 与单细胞介导炎症和血栓形成之间的新联系.
- 涉及TLR2,NFκB和单细胞TF的以前未被识别的机制放大了由Lp驱动的免疫血栓风险.
- 针对这种途径可能为ASCVD提供新的治疗策略.
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