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壳聚糖/透明质酸基仿生基质诱导人脂肪来源干细胞关节软骨分化。

Induction of Articular Chondrogenesis by Chitosan/Hyaluronic-Acid-Based Biomimetic Matrices Using Human Adipose-Derived Stem Cells.

机构信息

Department of Orthopedics, Physical Medicine and Rehabilitation, University Hospital of Munich, 81377 Munich, Germany.

BioMed Center Innovation gGmbH, 95448 Bayreuth, Germany.

出版信息

Int J Mol Sci. 2019 Sep 11;20(18):4487. doi: 10.3390/ijms20184487.

Abstract

Cartilage repair using tissue engineering is the most advanced clinical application in regenerative medicine, yet available solutions remain unsuccessful in reconstructing native cartilage in its proprietary form and function. Previous investigations have suggested that the combination of specific bioactive elements combined with a natural polymer could generate carrier matrices that enhance activities of seeded stem cells and possibly induce the desired matrix formation. The present study sought to clarify this by assessing whether a chitosan-hyaluronic-acid-based biomimetic matrix in conjunction with adipose-derived stem cells could support articular hyaline cartilage formation in relation to a standard chitosan-based construct. By assessing cellular development, matrix formation, and key gene/protein expressions during in vitro cultivation utilizing quantitative gene and immunofluorescent assays, results showed that chitosan with hyaluronic acid provides a suitable environment that supports stem cell differentiation towards cartilage matrix producing chondrocytes. However, on the molecular gene expression level, it has become apparent that, without combinations of morphogens, in the chondrogenic medium, hyaluronic acid with chitosan has a very limited capacity to stimulate and maintain stem cells in an articular chondrogenic state, suggesting that cocktails of various growth factors are one of the key features to regenerate articular cartilage, clinically.

摘要

组织工程学在软骨修复中的应用是再生医学中最先进的临床应用,但现有的解决方案仍未能以其固有形式和功能成功重建天然软骨。先前的研究表明,将特定的生物活性元素与天然聚合物结合使用,可能会产生载体基质,从而增强种子干细胞的活性,并可能诱导所需的基质形成。本研究通过评估壳聚糖-透明质酸仿生基质联合脂肪来源干细胞是否能够支持关节透明软骨形成,与标准壳聚糖基构建体进行了比较,旨在阐明这一点。通过评估体外培养过程中的细胞发育、基质形成和关键基因/蛋白表达,利用定量基因和免疫荧光分析,结果表明,透明质酸壳聚糖为干细胞向产生软骨基质的软骨细胞分化提供了适宜的环境。然而,在分子基因表达水平上,很明显,在软骨形成培养基中,没有形态发生素的组合,壳聚糖与透明质酸刺激和维持关节软骨状态的干细胞的能力非常有限,这表明各种生长因子的鸡尾酒疗法是再生关节软骨的关键特征之一,具有临床应用价值。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd0c/6770472/4b12d278b7b5/ijms-20-04487-g001.jpg

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