Poly-epsilon-caprolactone/poly(rotaxane) seeded with human dental pulp stem cells or osteoblasts promotes angiogenesis: a chorioallantoic membrane assay

Author(s)

de Oliveira, Natacha Kalline ; Ferraz, Emanuela Prado ; Perillo Rosin, Flavia Cristina ; Correa, Luciana ; Zindel Deboni, Maria Cristina

• Document type: Journal article
• Source: JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION; v. N/A, p. 16-pg., 2022-06-20.

Abstract

Biomaterials used for tissue regeneration should ideally provide a favorable environment for cell proliferation and differentiation. Angiogenesis is crucial for supplying oxygen and nutrients necessary for cellular survival at implantation sites. The aim of this study was to evaluate the overall angiogenesis response of a poly epsilon-caprolactone/poly (rotaxane) blend (poly-Wend) carried by human dental pulp stem cells (hDPSCs) or osteoblasts (OB) seeded in the chorioallantoic membranes (CAM) of fertilized chicken eggs on embryonic day 7. They were classified into the following intervention groups: (a) poly(polymeric blend disks free of cells); (b) hDPSC seeded onto CAM; (c) poly/hDPSC (where hDPSCs were seeded onto poly-blend); (d) poly/OB (where osteoblasts were seeded onto poly); (e) OB (where hDPSCs differentiated into osteoblasts were seeded onto CAM); and (f) a negative control when a sterilized silicone ring free of cells or polymer was inserted into CAM. On embryonic day 14, the quantitative and qualitative characteristics of the blood vessels in the CAMs were analyzed macroscopically and microscopically. Macroscopic examination showed that the Poly/hDPSC samples exhibited an increased medium vessel density. Additionally, microscopic observations showed that the Poly/hDPSC group and poly alone resulted in a large lumen area of vascularization. Thus, poly epsilon-caprolactone/poly (rotaxane) did not impair angiogenesis. Furthermore, poly-blend carried by stem cells of dental pulp origin shows a better vasculogenic potential, which is essential for regenerative therapies. (AU)

• FAPESP's process: 15/15055-0 - Dental pulp stem-cell viability, proliferation and osteogenic potential in PCL/Poli(rotaxane) membranes
• Grantee: Maria Cristina Zindel Deboni
• Support Opportunities: Regular Research Grants