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针对缺血性中风的反应性氧物种反应性硫酸多糖基纳米凝:通过病理微环境调制进行精密治疗
Dingfu Wang1, Dan Li1, Xiaolin Liu1
1Key Laboratory of Marine Drugs of Ministry of Education, Shandong Key Laboratory of Glycoscience and Glycotherapeutics, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China.
Acta biomaterialia
|September 26, 2025
概括
这项研究开发了一种用于治疗缺血性中风的新型纳米凝,改善药物输送并降低出血风险. 针对P-selectin的,对ROS有反应的纳米凝在脑梗塞地区取得了显著的恢复.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术纳米技术
- 药理学 药理学是指药理学的学科.
背景情况:
- 对于中风的常规血栓溶解剂具有局限性,包括短半衰期,不良准和出血风险.
- 开发有针对性的药物输送系统对于提高治疗疗效和治疗血栓性疾病的安全性至关重要.
研究的目的:
- 开发一种双功能纳米凝 (PGS-SP@UK),用于针对性血栓溶解和缺血性中风中的神经保护.
- 整合P-selectin介导的血栓向与ROS响应的药物释放以改善治疗结果.
主要方法:
- 合成了一种基于硫酸多糖的两性共聚合物,能够封装尿素酶 (英国).
- 利用P-选择素向和ROS-响应性特性用于药物释放 (H2O2触发).
- 在OGD/R模型中评估了体外神经保护,在脑梗塞模型中评估了体内疗效,评估了血脑屏障的透和血栓积累.
主要成果:
- 纳米凝表明H2O2触发的英国释放 (85.79%) 在生理条件下具有高稳定性.
- 在体外研究表明通过ferroptosis路径调节的神经保护作用.
- 在体内研究中,通过协同性血栓溶解和氧化应激缓解,通过有效的BBB透和血栓向,在脑梗塞区域实现了84.3%的恢复.
结论:
- 开发的双功能纳米凝 (PGS-SP@UK) 显示出在缺血性中风治疗中临床应用的巨大潜力.
- 这个创新的系统提供了协同作用的血栓溶解和神经保护,克服了传统疗法的局限性.
- 这项研究为结血栓性疾病的精密医学提供了一个新的治疗范式.
相关概念视频
01:15Ischemic Stroke l: Introduction
Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
01:15Ischemic Stroke ll: Pathophysiology
An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...