可注射的蛋白质水凝微球,可释放反应性氧物种的氧化,用于预防心脏缺血/再输血损伤
Houwei Zheng1, Fan Jia2, Ying Gao3
1MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, Zhejiang, China.
Acta biomaterialia
|August 24, 2025
概括
这项研究开发了一种可注射的水凝微球系统,可按需释放氧化 (NO),通过清除活性氧物种 (ROS) 来保护心脏免受伤害. 这种创新的NO输送策略改善了缺血/再输血损伤后的心脏的修复和功能.
科学领域:
- 生物材料科学
- 心血管研究
- 复原医学
背景情况:
- 氧化治疗心脏缺血/再注血 (I/ R) 损伤因其短半衰期和反应性氧物种 (ROS) 的快速消耗而受到限制.
- 制定持续和局部NO输送策略对于有效的心脏保护至关重要.
研究的目的:
- 设计一个可注射的水凝微球系统 (WPI-H-N),以应对氧化应激而随时释放NO.
- 在心肌梗塞中克服NO可用性和ROS消耗的局限性.
- 在老鼠I/R模型中评估WPI-H-N的治疗效果.
主要方法:
- 使用烯酸乳清蛋白 (WPI) 制造了用ROS可切割的乙酸链接剂功能化的水凝微球.
- 通过链接器连接ROS响应释放的5-异酸 (ISMN),一个NO供体.
- 用于评估WPI-H-N的保护作用的实体鼠标I/R模型.
主要成果:
- 由于氧化应激,WPI-H-N系统有效地清除了ROS,并释放了NO.
- 在体内研究显示,WPI-H-N保护心肌细胞免受亡和减少心脏氧化损伤.
- 治疗改善了心肌梗塞的血管生成和心脏功能.
结论:
- 开发的可注射水凝微球系统提供了一种双重方法来缓解心脏I/R损伤,通过清除ROS并允许按需释放NO.
- 这种策略有效地克服了传统NO疗法的关键局限性,为先进的心脏修复铺平了道路.
- 这些发现支持了对ROS敏感的NO输送系统在治疗心血管疾病和其他ROS相关病理方面的潜力.
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