Injectable hydrogels based on mussel-inspired nanocomposite microspheres for non-compressible intra-abdominal hemorrhage control.

IF 13.3 1区 医学 Q1 MEDICINE, RESEARCH & EXPERIMENTAL
Theranostics Pub Date : 2025-07-28 eCollection Date: 2025-01-01 DOI:10.7150/thno.118901
Tao Liu, Peng Ma, Fengya Jing, Yinghua Tao, Jinfang Lu, Dandan Wei, Liuxin Yang, Feiling Feng, Yonghua Li, Hongbin Yuan, Tianzhu Zhang
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引用次数: 0

Abstract

Background: The development of hemostatic materials for non-compressible intra-abdominal hemorrhage in complex pre-hospital emergency settings remains a formidable challenge. Methods: A novel injectable hydrogel based on mussel-inspired nanocomposite microspheres was designed. The biocompatible hydrogel was formed by hydrating gelatin methacryloyl (GelMA) cryogel microspheres-reinforced with polydopamine (PDA)-intercalated nanoclay-with sterile saline, offering the dual benefits of convenient storage of microspheres and precise delivery to deep bleeding points via injection. Results: The cryogel microspheres, featuring rapid water and blood absorption within 1 second, exhibited outstanding procoagulant capabilities in both in vitro and in vivo experiments, showing potential as hemostatic agents for open wounds. Notably, the on-demand formulated hydrogel effectively controlled severe bleeding within 2 minutes post-injection in rat liver volumetric defect and partial resection models, demonstrating ​significantly enhanced applicability compared to ​bulk hemostatic agents for irregular wounds. Additionally, ultrasound-guided application in a porcine liver ​rupture model confirmed that the hydrogel rapidly filled and sealed deep wounds, interacted with blood components to form stable, large clots adhering to the wound surface, and thus established durable hemostasis. Conclusion: This study presents a promising injectable hemostatic material for pre-hospital emergency hemorrhage control.

基于贻贝启发纳米复合微球的可注射水凝胶用于不可压缩的腹腔出血控制。
背景:在复杂的院前紧急情况下,开发用于不可压缩腹内出血的止血材料仍然是一个艰巨的挑战。方法:设计了一种新型的以贻贝为灵感的纳米复合微球为基础的可注射水凝胶。该生物相容性水凝胶是由明胶甲基丙烯酰(GelMA)低温凝胶微球与无菌生理盐水水化形成的,微球由聚多巴胺(PDA)嵌入纳米粘土增强,具有方便储存和通过注射精确输送到深部出血点的双重好处。结果:低温凝胶微球在体外和体内实验中均表现出良好的促凝能力,具有1秒内快速吸收水分和血液的特点,具有作为开放性伤口止血剂的潜力。值得注意的是,按需配制的水凝胶在大鼠肝脏体积缺损和部分切除模型中,注射后2分钟内可有效控制严重出血,与散装止血剂相比,对不规则伤口的适用性明显增强。此外,超声引导下在猪肝破裂模型中的应用证实,水凝胶快速填充和密封深层伤口,与血液成分相互作用,形成稳定的大凝块粘附在伤口表面,从而建立持久的止血作用。结论:本研究为院前急诊出血控制提供了一种有前景的注射止血材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Theranostics
Theranostics MEDICINE, RESEARCH & EXPERIMENTAL-
CiteScore
25.40
自引率
1.60%
发文量
433
审稿时长
1 months
期刊介绍: Theranostics serves as a pivotal platform for the exchange of clinical and scientific insights within the diagnostic and therapeutic molecular and nanomedicine community, along with allied professions engaged in integrating molecular imaging and therapy. As a multidisciplinary journal, Theranostics showcases innovative research articles spanning fields such as in vitro diagnostics and prognostics, in vivo molecular imaging, molecular therapeutics, image-guided therapy, biosensor technology, nanobiosensors, bioelectronics, system biology, translational medicine, point-of-care applications, and personalized medicine. Encouraging a broad spectrum of biomedical research with potential theranostic applications, the journal rigorously peer-reviews primary research, alongside publishing reviews, news, and commentary that aim to bridge the gap between the laboratory, clinic, and biotechnology industries.
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