Human osteoblasts within soft peptide hydrogels promote mineralisation in vitro.
Biomaterials that provide three-dimensional support networks for the culture of cells are being developed for a wide range of tissue engineering applications including the regeneration of bone. This study explores the potential of the versatile ionic-complementary peptide, FEFEFKFK, for such a purpose as this peptide spontaneously self-assembles into β-sheet-rich fibres that subsequently self-associate to form self-supporting hydrogels. Via simple live/dead cell assays, we demonstrated that 3 wt% hydrogels were optimal for the support of osteoblast cells. We went on to show that these cells are not only viable within the three-dimensional hydrogel but they also proliferate and produce osteogenic key proteins, that is, they behave like in vivo bone cells, over the 14-day period explored here. The gel elasticity increased over time when cells were present - in comparison to a decrease in control samples - indicating the deposition of matrix throughout the peptide scaffold. Moreover, significant quantities of calcium phosphate were deposited. Collectively, these data demonstrate that ionic-complementary octapeptides offer a suitable three-dimensional environment for osteoblastic cell function.
School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, UK ; Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK.
Luis A
LA
Castillo Diaz
Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK ; School of Materials, The University of Manchester, Manchester, UK.
Alberto
A
Saiani
School of Materials, The University of Manchester, Manchester, UK.
Julie E
JE
Gough
School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, UK ; Manchester Institute of Biotechnology, The University of Manchester, Manchester, UK.
Aline F
AF
Miller
Scaffold; bone formation; mechanical properties; osteoblast cells; peptide hydrogel