葡萄糖化胆固醇在动脉样硬化病变中积累,并影响巨细胞的免疫反应
André R A Marques1, Inês S Ferreira1, Quélia Ribeiro1
1iNOVA4Health, NOVA Medical School | Faculdade de Ciências Médicas, NMS | FCM, Universidade NOVA de Lisboa, Lisboa, Portugal.
Journal of lipid research
|May 17, 2025
概括
葡萄糖化胆固醇 (GlcChol) 在动脉样硬化中积累,像溶解体储存障碍一样起作用. 虽然高水平会损害巨细胞的功能,但中等水平的形成可能是胆固醇积累的补偿机制.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 病理学 病理学 病理学
背景情况:
- 动脉样硬化涉及胆固醇和糖脂的溶酶体积累.
- 这种积累创造了葡萄糖化胆固醇 (GlcChol) 形成的条件,这是溶酶体储存障碍的标志物.
- GlcChol在动脉样硬化病原体中的作用尚不清楚.
研究的目的:
- 调查GlcChol在动脉样硬化病变中的存在和作用.
- 探索GlcChol对巨细胞行为和细胞通路的影响.
- 为了确定GlcChol的形成是否是一种补偿机制或一种病原性因素.
主要方法:
- 液体染色学-并联质谱学 (LC-MS/MS) 用于在病变中量化GlcChol.
- 在体外实验中,将巨细胞暴露在氧化胆固醇和GlcChol.中.
- 分析细胞表型,增殖,炎症标志物和信号通路 (AMPK,mTOR,TFEB).
主要成果:
- 胆固醇在动脉样硬化病变中丰富,心血管疾病患者的胆固醇/胆固醇比率升高.
- 在实验室中,GlcChol暴露诱导了扩大的多核巨细胞,其增殖和促炎能力降低.
- 机制涉及AMPK,CDKN1A/p21,mTOR和TFEB的激活,影响细胞平衡和溶酶体生物发生.
结论:
- 动脉样硬化中的GlcChol积累类似于溶酶体储存障碍.
- 高度的GlcChol会对巨细胞功能产生负面影响,可能是通过ROS诱导的DNA损伤和改变的信号传递.
- 中度GlcChol形成可能是对胆固醇和GLS在病变中的积累的补偿反应.
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