Abstract
Abstract
Background
Tissue engineering focuses on reconstructing the damaged meniscus by mimicking the native meniscus. The application of mechanical loading on chondrocyte-laden decellularized whole meniscus is providing the natural microenvironment. The goal of this study was to evaluate the effects of dynamic compression and shear load on chondrocyte-laden decellularized meniscus.
Material and methods
The fresh samples of rabbit menisci were decellularized, and the DNA removal was confirmed by histological assessments and DNA quantification. The biocompatibility, degradation and hydration rate of decellularized menisci were evaluated. The decellularized meniscus was injected at a density of 1 × 105 chondrocyte per scaffold and was subjected to 3 cycles of dynamic compression and shear stimuli (1 h of 5% strain, ± 25°shear at 1 Hz followed by 1 h rest) every other day for 2 weeks using an ad hoc bioreactor. Cytotoxicity, GAG content, ultrastructure, gene expression and mechanical properties were examined in dynamic and static condition and compared to decellularized and intact menisci.
Results
Mechanical stimulation supported cell viability and increased glycosaminoglycan (GAG) accumulation. The expression of collagen-I (COL-I, 10.7-folds), COL-II (6.4-folds), aggrecan (AGG, 3.2-folds), and matrix metalloproteinase (MMP3, 2.3-folds) was upregulated compared to the static conditions. Furthermore, more aligned fibers and enhanced tensile strength were observed in the meniscus treated in dynamic condition with no sign of mineralization.
Conclusion
Compress and shear stimulation mimics the loads on the joint during walking and be able to improve cell function and ultrastructure of engineered tissue to recreate a functional artificial meniscus.
Funder
Shiraz University of Medical Sciences
Publisher
Springer Science and Business Media LLC
Subject
Cell Biology,Biochemistry, Genetics and Molecular Biology (miscellaneous),Molecular Medicine,Medicine (miscellaneous)
Reference54 articles.
1. Gee SM, Tennent DJ, Cameron KL, Posner MA. The burden of meniscus injury in young and physically active populations. Clin Sports Med. 2020;39(1):13–27.
2. Zhou T. Analysis of the biomechanical characteristics of the knee joint with a meniscus injury. Healthc Technol Lett. 2018;5(6):247–9.
3. Niu W, Guo W, Han S, Zhu Y, Liu S, Guo Q. Cell-based strategies for meniscus tissue engineering. Stem cells Int. 2016;2016:1–10.
4. Schoenfeld AJ, Landis WJ, Kay DB. Tissue-engineered meniscal constructs. Am J Orthop Belle Mead. 2007;36(11):614.
5. Sun J, Vijayavenkataraman S, Liu H. An overview of scaffold design and fabrication technology for engineered knee meniscus. Materials. 2017;10(1):29.
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