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An additive manufacturing-based PCL-alginate-chondrocyte bioprinted scaffold for cartilage tissue engineering

Open access
Kundu, Joydip, Shim, Jin-Hyung, Jang, Jinah, Kim, Sung-Won, Cho, Dong-Woo·2015·Journal of Tissue Engineering and Regenerative Medicine

Abstract

Regenerative medicine is targeted to improve, restore or replace damaged tissues or organs using a combination of cells, materials and growth factors. Both tissue engineering and developmental biology currently deal with the process of tissue self-assembly and extracellular matrix (ECM) deposition. In this investigation, additive manufacturing (AM) with a multihead deposition system (MHDS) was used to fabricate three-dimensional (3D) cell-printed scaffolds using layer-by-layer (LBL) deposition of polycaprolactone (PCL) and chondrocyte cell-encapsulated alginate hydrogel. Appropriate cell dispensing conditions and optimum alginate concentrations for maintaining cell viability were determined. In vitro cell-based biochemical assays were performed to determine glycosaminoglycans (GAGs), DNA and total collagen contents from different PCL-alginate gel constructs. PCL-alginate gels containing transforming growth factor-β (TGFβ) showed higher ECM formation. The 3D cell-printed scaffolds of PCL-alginate gel were implanted in the dorsal subcutaneous spaces of female nude mice. Histochemical [Alcian blue and haematoxylin and eosin (H&E) staining] and immunohistochemical (type II collagen) analyses of the retrieved implants after 4 weeks revealed enhanced cartilage tissue and type II collagen fibril formation in the PCL-alginate gel (+TGFβ) hybrid scaffold. In conclusion, we present an innovative cell-printed scaffold for cartilage regeneration fabricated by an advanced bioprinting technology.

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Metadata

Authors
Kundu, J., Shim, J.-H., Jang, J., Kim, S.-W., & Cho, D.-W.
Venue
Journal of Tissue Engineering and Regenerative Medicine
Published
2013-01-24
Volume
9
Issue
11
Pages
1286-1297
ISSN
1932-6254 (ISSN-L)
OpenAlex
W1778072505
Cited by
552
References
1
FWCI
12.58
Type
journal article
Language
en
Open access
bronze

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