Low-dose STS–PEG–chitosan coating on PLCL scaffolds: A multifunctional strategy for endothelialization, anti-inflammation, and antithrombosis in vascular grafts

IF 7.7 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Yutong Liu , Xiaolin Sun , Yunhuan Li , Kuihua Zhang , Zhiyong Yan , Changlin Zhai , Jinglei Wu , Anlin Yin
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引用次数: 0

Abstract

The long-term success of small-diameter vascular grafts remains limited by thrombosis, chronic inflammation, and poor endothelialization. To address these challenges, we developed a multifunctional coating strategy by integrating polyethylene glycol–chitosan (PEG–CS) with low-dose sodium tanshinone IIA sulfonate (STS, 0.01 %) on poly(L-lactide-co-ε-caprolactone) (PLCL) scaffolds. The PEG–CS/STS coating significantly improved hydrophilicity and structural stability, while providing bioactivity that promoted endothelial cell proliferation and alignment. In vitro studies demonstrated markedly reduced platelet adhesion and activation, along with a favorable shift in macrophage polarization toward the anti-inflammatory M2 phenotype. These synergistic effects create a vascular-friendly microenvironment that promotes endothelialization and suppresses thrombosis and inflammation. PEG reduces platelet adsorption, allowing STS to exert its anti-inflammatory effects, while chitosan’s electrostatic interaction with STS supports its stable loading and controlled release, enhancing its bioactivity. Our findings highlight that the PEG-CS/STS modified scaffold effectively integrates endothelialization, immunomodulation, and antithrombotic protection, representing a promising next generation strategy for small diameter vascular grafts.

Abstract Image

PLCL支架上低剂量sts - peg -壳聚糖涂层:血管移植内皮化、抗炎症和抗血栓形成的多功能策略
小直径血管移植的长期成功仍然受到血栓形成、慢性炎症和内皮化不良的限制。为了解决这些问题,我们开发了一种多功能涂层策略,将聚乙二醇-壳聚糖(PEG-CS)与低剂量丹西酮IIA磺酸钠(STS, 0.01%)结合在聚l -丙交酯-co-ε-己内酯(PLCL)支架上。PEG-CS /STS涂层显著提高了亲水性和结构稳定性,同时提供了促进内皮细胞增殖和排列的生物活性。体外研究显示血小板粘附和活化明显降低,巨噬细胞极化向抗炎M2表型有利转变。这些协同作用创造了一个有利于血管的微环境,促进内皮化,抑制血栓形成和炎症。聚乙二醇减少血小板吸附,使STS发挥抗炎作用,壳聚糖与STS的静电相互作用支持其稳定加载和控释,增强其生物活性。我们的研究结果强调,PEG-CS/STS修饰支架有效地整合了内皮化、免疫调节和抗血栓保护,代表了下一代小直径血管移植的有希望的策略。
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来源期刊
Composites Communications
Composites Communications Materials Science-Ceramics and Composites
CiteScore
12.10
自引率
10.00%
发文量
340
审稿时长
36 days
期刊介绍: Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.
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