Abstract：
:In situ gelating dextran-tyramine (Dex-TA) injectable hydrogels have previously shown promising features for cartilage repair. Yet, despite suitable mechanical properties, this system lacks intrinsic biological signals. In contrast, platelet lysate-derived hydrogels are rich in growth factors and anti-inflammatory cytokines, but mechanically unstable. We hypothesized that the advantages of these systems may be combined in one hydrogel, which can be easily translated into clinical settings. Platelet lysate was successfully incorporated into Dex-TA polymer solution prior to gelation. After enzymatic crosslinking, rheological and morphological evaluations were performed. Subsequently, the effect of platelet lysate on cell migration, adhesion, proliferation and multi-lineage differentiation was determined. Finally, we evaluated the integration potential of this gel onto osteoarthritis-affected cartilage. The mechanical properties and covalent attachment of Dex-TA to cartilage tissue during in situ gel formation were successfully combined with the advantages of platelet lysate, revealing the potential of this enhanced hydrogel as a cell-free approach. The addition of platelet lysate did not affect the mechanical properties and porosity of Dex-TA hydrogels. Furthermore, platelet lysate derived anabolic growth factors promoted proliferation and triggered chondrogenic differentiation of mesenchymal stromal cells.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Moreira Teixeira LS,Leijten JC,Wennink JW,Chatterjea AG,Feijen J,van Blitterswijk CA,Dijkstra PJ,Karperien Mdoi
10.1016/j.biomaterials.2012.01.051subject
Has Abstractpub_date
2012-05-01 00:00:00pages
3651-61issue
14eissn
0142-9612issn
1878-5905pii
S0142-9612(12)00098-1journal_volume
33pub_type
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