生物相容性
尿道
再生(生物学)
体内
粘膜下层
纤维化
背景(考古学)
生物医学工程
细胞外基质
材料科学
细胞生物学
医学
外科
病理
生物
古生物学
生物技术
冶金
作者
Liping Huang,Yuan Liu,Qianjin Li,Wenqian Zhang,Chen-Yu Wu,Lu Zhao,Huiqi Xie
标识
DOI:10.1002/adhm.202300519
摘要
Abstract To reconstruct and restore the functions of the male urethra is a challenging task for urologists. The acellular matrix graft currently used in the clinics is mono‐functional and may cause a series of complications including stricture, fibrosis, and stone formation. As a result, such graft materials cannot meet the increasing demand for multifunctionality in the field of urethral tissue engineering. In this context, a multifunctional urethral patch is designed for the repair of urethral defects by mixing protocatechualdehyde (PCA) with small intestinal submucosa (SIS) under an alkalin condition to allow cross linking. As shown, the PCA/SIS patch possesses excellent biocompatibility, antioxidant activity, and anti‐inflammatory property. More importantly, this patch can remarkably promote the adhesion, proliferation, and directional extension of rabbit bladder epithelial mucous cells (R‐EMCs) as well as rabbit bladder smooth muscle cells (R‐SMCs), and upregulate the expression of cytokeratin in the EMCs and contractile protein in the SMCs in vitro. In vivo experiments also confirm that the PCA/SIS patch can significantly enhance scarless repair of urethral defects in rabbits by facilitating smooth muscle regeneration, reducing excessive collagen deposition, and accelerating re‐epithelialization and neovascularization. Taken together, the newly developed multifunctional PCA/SIS patch provides a promising candidate for urethral regeneration.
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