适应微环境的纳米平台,有针对性地去除胆固醇,并在动脉样硬化斑块中重塑炎症微环境
Lin Shen1, Chengli Jiang1, Jingjing Song2
1Zhejiang Key Laboratory of Imaging and Interventional Medicine, Lishui Hospital, School of Medicine, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui 323000, Zhejiang, China; Department of Radiology, The Fifth Affiliated Hospital of Wenzhou Medical University, Lishui 323000, China.
概括
这项研究引入了一种新的纳米粒子配方,可以有效清除胆固醇晶体和反应性氧物种,这对于治疗动脉样硬化至关重要. 治疗显著降低了斑块负担和炎症,显示了心血管疾病治疗的前景.
科学领域:
- 生物医学工程 生物医学工程
- 心血管研究研究心血管研究
- 纳米医学是一种纳米医学.
背景情况:
- 动脉样硬化斑块含有胆固醇晶体 (CCs),活性氧物种 (ROS) 和M1巨细胞,推动动脉样硬化心血管疾病 (ASCVD) 的进展.
- 针对性地去除CC和ROS对于有效的ASCVD治疗至关重要.
研究的目的:
- 设计和评估一种智能纳米配方,用于向和重塑动脉样硬化斑块的微环境.
- 评估纳米配方在胆固醇清除,ROS清除和斑块减少方面的有效性.
主要方法:
- 开发一种纳米配方 (EGCG/Cys/UDCA@VHPK-Lipo),使用表甲基甲酸盐 (EGCG),氨酸 (Cys),乌尔索二氧化醇酸 (UDCA) 和VHPK改性脂质体.
- 在体外和体内实验中评估胆固醇溶解,ROS清除,斑块清除效率和对巨细胞两极分化的影响.
- 用RNA测序 (RNA-seq) 分析来研究分子机制,包括ATP结合盒载体 (ABCA1和ABCG1) 的表达.
主要成果:
- UDCA在泡细胞中促进了超过70%的胆固醇外流,而EGCG则增加了约50%的ROS清除.
- 纳米配方在体内实现了 75.43% 的斑块清除效率.
- RNA-seq揭示了上调的ABCA1和ABCG1表达,促进胆固醇代谢和M2巨细胞两极分化,以及减少炎症标志物.
结论:
- EGCG/Cys/UDCA@VHPK-Lipo纳米配方有效地向动脉样硬化斑块,清除CCs和ROS.
- 这种纳米平台在体外和体内表现出卓越的斑块清除和安全性,为ASCVD治疗提供了显著的临床潜力.
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