NIR-II散射金超级集群用于血管内光学连贯性断层扫描分子成像
Nicholas D Calvert1, Joshua Baxter2, Aidan A Torrens1
1Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada.
Nature nanotechnology
|October 29, 2024
概括
研究人员开发了黄金超级集群 (AuSCs) 用于用血管内光学连贯性断层扫描 (IV-OCT) 进行分子成像. 这种新型的对比剂可以早期检测血管炎症,改善心血管疾病的风险分层.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 医疗成像医学成像
背景情况:
- 血管内光学相干断层扫描 (IV-OCT) 目前仅提供血管的解剖成像.
- 内皮细胞的分子特征是必要的,以更早地检测和风险分层的血管疾病.
- 需要专门的IV-OCT对比剂进行分子成像.
研究的目的:
- 开发和描述金超级星团 (AuSCs) 作为分子IV-OCT成像的新型对比剂.
- 功能化AuSCs以准特定的血管标记物.
- 评估AuSCs在检测血管内炎症方面的有效性.
主要方法:
- 在IV-OCT激光线上为增强光散射而进行等离子体杂交的水性分散黄金超级团 (AuSC) 的合成.
- 对AuSC进行聚合物涂层,以实现统一性和功能化.
- 将AuSC向P-选择素,这是血管炎症的早期标志物.
- 在使用IV-OCT的血管内炎症的老鼠模型中进行体内测试.
主要成果:
- AuSCs在~1,350 nm处显示出最大化的光散射,适合IV-OCT.
- 针对p-selectin的AuSCs能够在老鼠模型中进行分子成像.
- IV-OCT信号强度与实验诱导的血管炎症的严重程度相关.
结论:
- 针对P-选择素的AuSCs是分子IV-OCT成像的可行的对比剂.
- 这项技术促进了血管炎症的早期检测和风险分层.
- AuSCs代表了心血管疾病诊断的重大进展.
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