期刊
MACROMOLECULAR MATERIALS AND ENGINEERING
卷 307, 期 1, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.202100584
关键词
electrospinning; fiber alignment; fibrous scaffolds; polyurethane; tendon and ligament tissue engineering
资金
- Region Ile-de-France
- CNRS
- French Embassy in Iran
- Ministry of Science, Research, and Technology of Iran
- office of Professional Laboratories and Technology Services in Amirkabir University of Technology (Tehran Polytechnic) [1400-0506]
- Sorbonne-Universite
Scaffold microstructure significantly influences the response of mesenchymal stem cells, with aligned nanofiber scaffolds enhancing tendon and ligament regeneration at the cellular level. While all scaffold types support cell behavior similarly, aligned nanofibers notably upregulate tendon-related markers expression.
In spite of improvements in tissue engineering approaches, tendon and ligament (T/L) regeneration is still a clinical challenge. The fabrication of functional scaffolds that possess the structural and biological properties of native T/L tissues is critical to a successful healing. Herein, the effect of scaffold microstructure on mesenchymal stem cells (MSCs) response is evaluated. Electrospun polyurethane (EPU) scaffolds with different alignment degrees of nanofibers are fabricated using five rotating speeds of the collector. Although the constructs display similarity in terms of porosity (85%), the increasing degree of alignment results in a notable reduction of fiber diameter. Accordingly, it also improves the tensile strength from 26.44 +/- 0.50 to 35.76 +/- 1.50 MPa and tensile modulus from 18.94 +/- 1.02 to 31.10 +/- 1.11 MPa. Furthermore, despite similarities of cell supporting behavior among all types of scaffolds in terms of cell attachment, spreading, proliferation, and infiltration, the aligned nanofibers noticeably direct cell orientation parallel to their alignment direction, resulting in significant upregulation of tendon-related markers expression. Taken together, the results highlight that the aligned EPU scaffolds are a promising candidate for T/L regeneration, which deserves to be further investigated with long-term studies.
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