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Frontiers of Materials Science

ISSN 2095-025X

ISSN 2095-0268(Online)

CN 11-5985/TB

Postal Subscription Code 80-974

2018 Impact Factor: 1.701

Front. Mater. Sci.    2016, Vol. 10 Issue (2) : 101-112    https://doi.org/10.1007/s11706-016-0335-y
RESEARCH ARTICLE
Characterization of decellularized scaffold derived from porcine meniscus for tissue engineering applications
Shuang GAO1,Zhiguo YUAN2,Tingfei XI1,*(),Xiaojuan WEI1,3,Quanyi GUO2
1. Center for Biomaterial and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
2. Key Laboratory of PLA, Institute of Orthopaedics, Chinese PLA General Hospital, Beijing 100853, China
3. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
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Abstract

Menisci are fundamental fibrocartilaginous organs in knee joints. The injury in meniscus can impair normal knee function and predisposes patients to osteoarthritis. This study prepared decellularized meniscus scaffolds using a 1% (w/w) sodium dodecyl sulfate solution and sufficient rinsing steps. Complete cell removal was verified by hematoxylin and eosin staining and DNA content assay. Decellularized menisci had accordant tension properties to intact ones, but with declined compression properties. This occurred because the collagen fiber was not damaged but glycosaminoglycans was significantly lost during the decellularization process, which was confirmed by biochemical assay and histology staining. In vitro cytotoxicity assay demonstrated that decellularized meniscus scaffolds have no toxicity on L929 murine fibroblasts and porcine chondrocytes. Further experiment showed that porcine chondrocytes could adhere and proliferate on the scaffold surface, and some cells even could infiltrate into the scaffold. All results showed the potential of this decellularized meniscus to be the scaffolds in tissue engineering.

Keywords meniscus scaffold      decellularization      biomechanical      cytotoxicity      tissue engineering     
Corresponding Author(s): Tingfei XI   
Online First Date: 06 April 2016    Issue Date: 11 May 2016
 Cite this article:   
Shuang GAO,Zhiguo YUAN,Tingfei XI, et al. Characterization of decellularized scaffold derived from porcine meniscus for tissue engineering applications[J]. Front. Mater. Sci., 2016, 10(2): 101-112.
 URL:  
https://academic.hep.com.cn/foms/EN/10.1007/s11706-016-0335-y
https://academic.hep.com.cn/foms/EN/Y2016/V10/I2/101
Fig.1  SEM images of (A) intact and (B) decellularized menisci. (C) Macroscopic features of intact and decellularized menisci.
Fig.2  Histology staining of intact and decellularized menisci. H&E staining of (A) intact and (B) decellularized menisci. Sirius red staining of (C) intact meniscus and (C1) viewed in polarized light field; (D) decellularized meniscus and (D1) viewed in polarized light field. Alcian blue staining of (E) intact and (F) decellularized menisci.
Sample Component content /(μg·(mg dry weight)-1)
DNA Hydroxyproline sGAG
Intact menisci (48.69±1.39)×10-3 106.25±8.13 10.31±0.37
Decellularized menisci (3.79±0.49)×10-3a) 111.10±8.69 5.19±1.31 a)
Tab.1  DNA, hydroxyproline and sGAG content in intact and decellularized menisci
Sample Mechanical properties
Tensile modulus /MPa Failure strain /% Failure stress /MPa Compression modulus /kPa
Intact menisci 203.5±21.60 21.4±2.95 29.4±7.34 849.1±344.8
Decellularized menisci 199.7±16.32 26.6±4.94 29.5±6.57 424.8±96.06 a)
Tab.2  Mechanical properties in intact and decellularized menisci
Fig.3  Cytotoxicity to L929 cells and PCs by the extract and contact methods in vitro (* p<0.05, by ANOVA).
Fig.4  (A)(B)(C) Live/dead staining of PCs seeded on decellularized meniscus scaffolds. (D)(E)(F) SEM images of PCs seeded on decellularized meniscus scaffolds.
Fig.5  (A) Cytoactivity of PCs seeded on scaffolds. (B) H&E staining of PCs cultured on scaffolds at 7 d.
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