Prevascularized hydrogels with mature vascular networks promote the regeneration of critical‐size calvarial bone defects in vivo
| Autor: | Avathamsa Athirasala, Luiz E. Bertassoni, Ramesh Subbiah, Greeshma Thrivikraman, Hua Xie, S. Prakash Parthiban, James M. Jones |
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| Rok vydání: | 2021 |
| Předmět: |
Male
Stromal cell 0206 medical engineering Endothelial cell morphogenesis Biomedical Engineering Medicine (miscellaneous) 02 engineering and technology Mural cell Umbilical vein Biomaterials Rats Nude 03 medical and health sciences Vascularity medicine Animals Humans Bone regeneration 030304 developmental biology 0303 health sciences Chemistry Regeneration (biology) Skull Hydrogels Mesenchymal Stem Cells Cells Immobilized 020601 biomedical engineering Rats Cell biology Self-healing hydrogels Heterografts medicine.symptom |
| Zdroj: | Journal of Tissue Engineering and Regenerative Medicine. 15:219-231 |
| ISSN: | 1932-7005 1932-6254 |
| DOI: | 10.1002/term.3166 |
| Popis: | Adequate vascularization of scaffolds is a prerequisite for successful repair and regeneration of lost and damaged tissues. It has been suggested that the maturity of engineered vascular capillaries, which is largely determined by the presence of functional perivascular mural cells (or pericytes), plays a vital role in maintaining vessel integrity during tissue repair and regeneration. Here, we investigated the role of pericyte-supported engineered capillaries in regenerating bone in a critical-size rat calvarial defect model. Prior to implantation, human umbilical vein endothelial cells (HUVECs) and human bone marrow stromal cells (hBMSCs) were co-cultured in a collagen hydrogel to induce endothelial cell morphogenesis into microcapillaries and hBMSC differentiation into pericytes. Upon implantation into the calvarial bone defects (8 mm), the prevascularized hydrogels showed better bone formation than either untreated controls or defects treated with autologous bone grafts (positive control). Bone formation parameters such as bone volume, coverage area, and vascularity were significantly better in the prevascularized hydrogel group than in the autologous bone group. Our results demonstrate that tissue constructs engineered with pericyte-supported vascular capillaries may approximate the regenerative capacity of autologous bone, despite the absence of osteoinductive or vasculogenic growth factors. This article is protected by copyright. All rights reserved. |
| Databáze: | OpenAIRE |
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