TY - JOUR
T1 - MgCHA particles dispersion in porous PCL scaffolds
T2 - In vitro mineralization and in vivo bone formation
AU - Guarino, Vincenzo
AU - Scaglione, Silvia
AU - Sandri, Monica
AU - Alvarez-Perez, Marco A.
AU - Tampieri, Anna
AU - Quarto, Rodolfo
AU - Ambrosio, Luigi
N1 - Copyright:
Copyright 2022 Elsevier B.V., All rights reserved.
PY - 2014/4
Y1 - 2014/4
N2 - In this work, we focus on the in vitro and in vivo response of composite scaffolds obtained by incorporating Mg,CO3-doped hydroxyapatite (HA) particles in poly(ε-caprolactone) (PCL) porous matrices. After a complete analysis of chemical and physical properties of synthesized particles (i.e. SEM/EDS, DSC, XRD and FTIR), we demonstrate that the Mg,CO3 doping influences the surface wettability with implications upon cell-material interaction and new bone formation mechanisms. In particular, ion substitution in apatite crystals positively influences the early in vitro cellular response of human mesenchymal stem cells (hMSCs), i.e. adhesion and proliferation, and promotes an extensive mineralization of the scaffold in osteogenic medium, thus conforming to a more faithful reproduction of the native bone environment than undoped HA particles, used as control in PCL matrices. Furthermore, we demonstrate that Mg,CO3-doped HA in PCL scaffolds support the in vivo cellular response by inducing neo-bone formation as early as 2months post-implantation, and abundant mature bone tissue at the sixth month, with a lamellar structure and completely formed bone marrow. Together, these results indicate that Mg2+ and CO3
2- ion substitution in HA particles enhances the scaffold properties, providing the right chemical signals to combine with morphological requirements (i.e. pore size, shape and interconnectivity) to drive osteogenic response in scaffold-aided bone regeneration.
AB - In this work, we focus on the in vitro and in vivo response of composite scaffolds obtained by incorporating Mg,CO3-doped hydroxyapatite (HA) particles in poly(ε-caprolactone) (PCL) porous matrices. After a complete analysis of chemical and physical properties of synthesized particles (i.e. SEM/EDS, DSC, XRD and FTIR), we demonstrate that the Mg,CO3 doping influences the surface wettability with implications upon cell-material interaction and new bone formation mechanisms. In particular, ion substitution in apatite crystals positively influences the early in vitro cellular response of human mesenchymal stem cells (hMSCs), i.e. adhesion and proliferation, and promotes an extensive mineralization of the scaffold in osteogenic medium, thus conforming to a more faithful reproduction of the native bone environment than undoped HA particles, used as control in PCL matrices. Furthermore, we demonstrate that Mg,CO3-doped HA in PCL scaffolds support the in vivo cellular response by inducing neo-bone formation as early as 2months post-implantation, and abundant mature bone tissue at the sixth month, with a lamellar structure and completely formed bone marrow. Together, these results indicate that Mg2+ and CO3
2- ion substitution in HA particles enhances the scaffold properties, providing the right chemical signals to combine with morphological requirements (i.e. pore size, shape and interconnectivity) to drive osteogenic response in scaffold-aided bone regeneration.
KW - Bone regeneration
KW - Composite scaffolds
KW - Ectopic model
KW - Hydroxyapatite
KW - Magnesium
KW - Mesenchymal stem cells
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U2 - 10.1002/term.1521
DO - 10.1002/term.1521
M3 - Article
C2 - 22730225
AN - SCOPUS:84898601569
SN - 1932-6254
VL - 8
SP - 291
EP - 303
JO - Journal of Tissue Engineering and Regenerative Medicine
JF - Journal of Tissue Engineering and Regenerative Medicine
IS - 4
ER -