级增强的Pt纳米酶平台在微凝上,用于有效的乳酸耗尽和肌肉梗塞后EndoMT衰减
Liang Song1, Yongyuan Kang1, Pai Peng1
1Zhejiang Key Laboratory of Advanced Organic Materials and Technologies, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310058, China.
Biomaterials
|January 22, 2026
概括
这项研究引入了一种微凝的纳米酶系统,该系统增强氧气生成以促进乳酸清除,有效减少心肌纤维化和心肌梗塞后改善心脏功能.
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
- 纳米技术 纳米技术
背景情况:
- 心肌梗塞 (MI) 导致过度的乳酸积累,促进内皮转移到介质细胞 (EndoMT) 和心肌纤维化.
- 肌痛性心脏病的低氧会降低乳酸氧化酶 (LOx) 治疗对于乳酸清除的有效性.
研究的目的:
- 开发一种新的纳米酶系统,以克服缺氧引起的限制,并增强乳酸清除,用于治疗心脏病发作.
- 为了研究微凝的LOx载 (Pt) 纳米酶 (PPtL@MGs) 的治疗潜力,以减轻MI引起的心脏损伤.
主要方法:
- (Pt) 纳米酶具有类似酶 (CAT) 的活性被合成,从过氧化 (H2O2) 中产生氧 (O2).
- 装载LOx的Pt纳米酶被封装在微凝 (PPtL@MGs) 中,用于针对性地传递和保留心肌梗塞.
- 在体外和体外的研究评估了该系统清除乳酸盐,减少EndoMT,抑制纤维化和改善心脏功能的能力.
主要成果:
- PPtL@MGs表现出强大的CAT类活动,通过产生O2.2来提高LOx效率.
- 该系统在体外有效清除乳酸,减轻人静脉内皮细胞 (HUVECs) 中的缺氧/H2O2诱导的EndoMT.
- 在体内,PPtL@MGs促进了VE-cadherin的表达,抑制了FSP1,减少了心肌纤维化,并显著改善了心脏功能.
结论:
- 微凝的纳米酶系统通过O2生成和乳酸清除为乳酸调节提供了级联增强的方法.
- 这一策略有效地缓解了心肌梗塞诱导的纤维化和心脏功能障碍,显示出显著的治疗潜力.
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