2010 Volume No 20 – pages 134-148
|
Title: Type II collagen-hyaluronan hydrogel – a step towards a scaffold for intervertebral disc tissue engineering |
Author: L Calderon, E Collin, D Velasco-Bayon, M Murphy, D O’Halloran, A Pandit |
|
Address: Network of Excellence in Functional Biomaterials, National University of Ireland, Galway, Ireland |
|
E-mail: abhay.pandit at nuigalway.ie |
|
Key Words: Hydrogels, hyaluronic acid, type II collagen, nucleus pulposus, mesenchymal stem cells |
|
Publication date: September 6th 2010 |
|
Abstract: Intervertebral disc regeneration strategies based on stem cell differentiation in combination with the design of functional scaffolds is an attractive approach towards repairing/regenerating the nucleus pulposus. The specific aim of this study was to optimise a composite hydrogel composed of type II collagen and hyaluronic acid (HA) as a carrier for mesenchymal stem cells. Hydrogel stabilisation was achieved by means of 1-ethyl-3(3-dimethyl aminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS) cross-linking. Optimal hydrogel properties were determined by investigating different concentrations of EDC (8mM, 24mM and 48mM). Stable hydrogels were obtained independent of the concentration of carbodiimide used. The hydrogels cross-linked by the lowest concentration of EDC (8mM) demonstrated high swelling properties. Additionally, improved proliferation of seeded rat mesenchymal stem cells (rMSCs) and hydrogel stability levels in culture were observed with this 8mM cross-linked hydrogel. Results from this study indicate that EDC/NHS (8mM) cross-linked type II collagen/HA hydrogel was capable of supporting viability of rMSCs, and furthermore their differentiation into a chondrogenic lineage. Further investigations should be conducted to determine its potential as scaffold for nucleus pulposus regeneration/repair. |
|
Article download: Pages
134-148 (PDF file) |
|