Bryan Andrew E, Krutko Maksym, Rebholz Sandra, Marquez Lindsey E, Busch Emma, Dong Kevin, Pixley Sarah K, Cushion Melanie T, Esfandiari Leyla, Harris Greg M
Department of Chemical and Environmental Engineering, College of Engineering and Applied Sciences, University of Cincinnati, Cincinnati, OH, USA 45221.
Department of Biomedical Engineering, College of Engineering and Applied Sciences, University of Cincinnati, Cincinnati, OH, USA 45221.
Biomater Sci. 2025 Sep 2. doi: 10.1039/d5bm01054c.
Current biomaterials for trauma-associated tissue repair often fail to recapitulate the complex signaling environment required for effective integration and regeneration, particularly in modulating immune responses post-implantation. To address these limitations, we developed a multi-cue electrospun scaffold incorporating physiologically relevant chemical, electrical, and physical signals. Using blend electrospinning, we functionalized poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) with cell-secreted, decellularized extracellular matrix (dECM) to enhance cellular responses and limit foreign body reactions. The resulting scaffolds were systematically characterized for their structural, biochemical, and piezoelectric properties, and evaluated for their ability to support Schwann cell adhesion, metabolism, and repair-associated morphology in the context of peripheral nerve injury (PNI). subcutaneous implantation in rats demonstrated reduced foreign body giant cell formation at 7 days, and by 28 days, signs of regenerative healing, including vascularization and nerve tissue formation, were observed near the implantation site. Overall, these dECM-integrated PVDF-TrFE scaffolds effectively modulate immune responses and promote regenerative cell phenotypes. This work highlights the potential of bioactive, electroactive, and biomimetic scaffolds as next-generation implantable platforms for tissue engineering and repair.
目前用于创伤相关组织修复的生物材料往往无法重现有效整合和再生所需的复杂信号环境,尤其是在调节植入后的免疫反应方面。为了解决这些局限性,我们开发了一种包含生理相关化学、电学和物理信号的多线索电纺支架。通过共混电纺,我们用细胞分泌的脱细胞细胞外基质(dECM)对聚(偏二氟乙烯-三氟乙烯)(PVDF-TrFE)进行功能化,以增强细胞反应并限制异物反应。对所得支架的结构、生化和压电性能进行了系统表征,并评估了它们在外周神经损伤(PNI)情况下支持雪旺细胞粘附、代谢和修复相关形态的能力。在大鼠皮下植入显示7天时异物巨细胞形成减少,到28天时,在植入部位附近观察到再生愈合的迹象,包括血管化和神经组织形成。总体而言,这些整合了dECM的PVDF-TrFE支架有效地调节免疫反应并促进再生细胞表型。这项工作突出了生物活性、电活性和仿生支架作为组织工程和修复的下一代可植入平台的潜力。
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