Synergistic effects on mesenchymal stem cell-based cartilage regeneration by chondrogenic preconditioning and mechanical stimulation
Publication in refereed journal

替代計量分析
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其它資訊
摘要Background
Mesenchymal stem cells (MSCs) hold promising translational potential in cartilage regeneration. However, the efficacy of MSC-based tissue engineering is not satisfactory in the treatment of cartilage defect because of the inevitable cellular functional changes during ex vivo cell expansion. How to maintain the chondrogenic capacity of MSCs to improve their therapeutic outcomes remains an outstanding question.

Methods
Bone marrow-derived MSCs were firstly primed in chondrogenic induction medium which was then replaced with normal growth medium to attain the manipulated cells (M-MSCs). Methacrylated hyaluronic acid (MeHA) was synthesized as a scaffold to encapsulate the cells. The MSC- or M-MSC-laden constructs were treated with dynamic compressive loading (DL) in a bioreactor or with free loading (FL) for 14 days. Afterwards, the constructs were implanted in nude mice or rat models of osteochondral defects to test their efficiency in cartilage regeneration or repair.

Results
Data showed that the resulting M-MSCs exhibited superior chondrogenic differentiation potential and survivability compared with untreated MSCs. More importantly, we found that DL significantly promoted neocartilage formation in the MeHA hydrogel encapsulated with M-MSCs after 30 days of implantation in nude mice. Furthermore, the constructs laden with M-MSCs after DL for 14 days significantly enhanced cartilage healing in a rat model of osteochondral defect.

Conclusions
Findings from this study highlight the importance of maintaining chondrogenic potential of MSCs by in-vitro chondrogenic preconditioning and a synergistic effect of mechanical stimulation in cartilage engineering, which may shed light on the stem cell-based tissue engineering for cartilage repair.
出版社接受日期13.09.2017
著者Sien Lin, Wayne Yuk Wai Lee, Qian Feng, Liangliang Xu, Bin Wang, Gene Chi Wai Man, Yuanfeng Chen, Xiaohua Jiang, Liming Bian, Liao Cui, Bo Wei, Gang Li
期刊名稱Stem Cell Research and Therapy
出版年份2017
月份10
日期3
卷號8
出版社BioMed Central
頁次221
國際標準期刊號1757-6512
語言美式英語
關鍵詞Tissue engineering, Mesenchymal stem cells, Chondrogenesis, Mechanotransduction, Cartilage diseases

上次更新時間 2020-18-10 於 02:37