Issue 40, 2021

Interconnected collagen porous scaffolds prepared with sacrificial PLGA sponge templates for cartilage tissue engineering

Abstract

Interconnected pore structures of scaffolds are important to control the cell functions for cartilage tissue engineering. In this study, collagen scaffolds with interconnected pore structures were prepared using poly(D,L-lactide-co-glycolide) (PLGA) sponges as sacrificial templates. Six types of PLGA sponges of different pore sizes and porosities were prepared by the solvent casting/particulate leaching method and used to regulate the interconnectivity of the collagen scaffolds. The integral and continuous templating structure of PLGA sponges generated well-interconnected pore structures in the collagen scaffolds. Bovine articular chondrocytes cultured in collagen scaffolds showed homogenous distribution, fast proliferation, high expression of cartilaginous genes and high secretion of cartilaginous extracellular matrix. In particular, the collagen scaffold templated by the PLGA sacrificial sponge that was prepared with a high weight ratio of PLGA and large salt particulates showed the most promotive effect on cartilage tissue formation. The interconnected pore structure facilitated cell distribution, cell–cell interaction and cartilage tissue regeneration.

Graphical abstract: Interconnected collagen porous scaffolds prepared with sacrificial PLGA sponge templates for cartilage tissue engineering

Supplementary files

Article information

Article type
Paper
Submitted
16 jul 2021
Accepted
31 aug 2021
First published
31 aug 2021

J. Mater. Chem. B, 2021,9, 8491-8500

Interconnected collagen porous scaffolds prepared with sacrificial PLGA sponge templates for cartilage tissue engineering

Y. Xie, K. Lee, X. Wang, T. Yoshitomi, N. Kawazoe, Y. Yang and G. Chen, J. Mater. Chem. B, 2021, 9, 8491 DOI: 10.1039/D1TB01559A

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