Heparin‐modified alginate microspheres enhance neovessel formation in hiPSC ‐derived endothelial cells and heterocellular in vitro models by controlled release of vascular endothelial growth factor
| Autor: | Kareen L.K. Coulombe, Carly Kabelac, Fabiola Munarin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Angiogenesis 0206 medical engineering Metals and Alloys Biomedical Engineering 02 engineering and technology Heparin 021001 nanoscience & nanotechnology 020601 biomedical engineering Regenerative medicine Controlled release Biomaterials Extracellular matrix Vascular endothelial growth factor chemistry.chemical_compound chemistry Self-healing hydrogels Ceramics and Composites medicine Biophysics 0210 nano-technology Induced pluripotent stem cell medicine.drug |
| Zdroj: | Journal of Biomedical Materials Research Part A. 109:1726-1736 |
| ISSN: | 1552-4965 1549-3296 |
| Popis: | A formidable challenge in regenerative medicine is the development of stable microvascular networks to restore adequate blood flow or to sustain graft viability and long-term function in implanted or ischemic tissues. In this work, we develop a biomimetic approach to increase the binding affinity of the extracellular matrix for the class of heparin-binding growth factors to localize and control the release of proangiogenic cues while maintaining their bioactivity. Sulfate and heparin moieties are covalently coupled to alginate, and alginate microspheres are produced and used as local delivery depots for vascular endothelial growth factor (VEGF). Release of VEGF from sulfate-alginate and heparin-alginate bulk hydrogels and microspheres was sustained over 14 days. In vitro evaluation with human induced pluripotent stem cell (hiPSC)-derived endothelial cells and aortic ring assay in a chemically defined hydrogel demonstrates development of primitive three-dimensional vessel-like networks in the presence of VEGF released from the chemically modified alginate microspheres. Furthermore, our results suggest that the sulfate groups available on the chemically modified alginate microspheres promote some new vessel formation even in VEGF-free samples. Based on this evidence, we conclude that sulfate- and heparin-alginate hydrogels are adaptive and bioactive delivery systems for revascularization therapy and translational vascular tissue engineering. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text