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Feasibility of Autologous Bone Marrow Mesenchymal Stem Cell-Derived Extracellular Matrix Scaffold for Cartilage Tissue Engineering

机译:自体骨髓间充质干细胞衍生的细胞外基质支架在软骨组织工程中的可行性

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摘要

Extracellular matrix (ECM) materials are widely used in cartilage tissue engineering. However, the current ECM materials are unsatisfactory for clinical practice as most of them are derived from allogenous or xenogenous tissue. This study was designed to develop a novel autologous ECM scaffold for cartilage tissue engineering. The autologous bone marrow mesenchymal stem cell-derived ECM (aBMSC-dECM) membrane was collected and fabricated into a three-dimensional porous scaffold via cross-linking and freeze-drying techniques. Articular chondrocytes were seeded into the aBMSC-dECM scaffold and atelocollagen scaffold, respectively. An in vitro culture and an in vivo implantation in nude mice model were performed to evaluate the influence on engineered cartilage. The current results showed that the aBMSC-dECM scaffold had a good microstructure and biocompatibility. After 4 weeks in vitro culture, the engineered cartilage in the aBMSC-dECM scaffold group formed thicker cartilage tissue with more homogeneous structure and higher expressions of cartilaginous gene and protein compared with the atelocollagen scaffold group. Furthermore, the engineered cartilage based on the aBMSC-dECM scaffold showed better cartilage formation in terms of volume and homogeneity, cartilage matrix content, and compressive modulus after 3 weeks in vivo implantation. These results indicated that the aBMSC-dECM scaffold could be a successful novel candidate scaffold for cartilage tissue engineering.
机译:细胞外基质(ECM)材料广泛用于软骨组织工程。然而,当前的ECM材料对于临床实践是不令人满意的,因为它们大多数是来自异体或异种组织。本研究旨在开发用于软骨组织工程的新型自体ECM支架。收集自体骨髓间充质干细胞衍生的ECM(aBMSC-dECM)膜,并通过交联和冷冻干燥技术将其制成三维多孔支架。将关节​​软骨细胞分别接种到aBMSC-dECM支架和端粒胶原蛋白支架中。在裸鼠模型中进行体外培养和体内植入,以评估其对工程软骨的影响。目前的结果表明,aBMSC-dECM支架具有良好的微观结构和生物相容性。体外培养4周后,与端胶原胶原支架组相比,aBMSC-dECM支架组中的工程软骨形成了较厚的软骨组织,具有更均匀的结构和更高的软骨基因和蛋白质表达。此外,在体内植入3周后,基于aBMSC-dECM支架的工程软骨在体积和均质性,软骨基质含量和压缩模量方面表现出更好的软骨形成。这些结果表明,aBMSC-dECM支架可能是成功的新型软骨组织工程候选支架。

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