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A Chemotactic Functional Scaffold with VEGF-Releasing Peptide Amphiphiles Facilitates Bone Regeneration by BMP-2 in a Large-Scale Rodent Cranial Defect Model.
Bakshi, Reena; Hokugo, Akishige; Khalil, Daniel; Wang, Lixin; Shibuya, Yoichiro; Zhou, Situo; Zhang, Zheyu; Rezzadeh, Kameron; McClendon, Mark; Stupp, Samuel I; Jarrahy, Reza.
Afiliación
  • Bakshi R; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • Hokugo A; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • Khalil D; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • Wang L; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • Shibuya Y; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • Zhou S; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • Zhang Z; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • Rezzadeh K; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • McClendon M; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • Stupp SI; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
  • Jarrahy R; From the Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles; the Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of Tsukuba;
Plast Reconstr Surg ; 147(2): 386-397, 2021 02 01.
Article en En | MEDLINE | ID: mdl-33235044
ABSTRACT

BACKGROUND:

Current common techniques for repairing calvarial defects by autologous bone grafting and alloplastic implants have significant limitations. In this study, the authors investigated a novel alternative approach to bone repair based on peptide amphiphile nanofiber gels that are engineered to control the release of vascular endothelial growth factor (VEGF) to recruit circulating stem cells to a site of bone regeneration and facilitate bone healing by bone morphogenetic protein-2 (BMP-2).

METHODS:

VEGF release kinetics from peptide amphiphile gels were evaluated. Chemotactic functional scaffolds were fabricated by combining collagen sponges with peptide amphiphile gels containing VEGF. The in vitro and in vivo chemotactic activities of the scaffolds were evaluated by measuring mesenchymal stem cell migration, and angiogenic capability of the scaffolds was also evaluated. Large-scale rodent cranial bone defects were created to evaluate bone regeneration after implanting the scaffolds and other control materials.

RESULTS:

VEGF was released from peptide amphiphile in a controlled-release manner. In vitro migration of mesenchymal stem cells was significantly greater when exposed to chemotactic functional scaffolds compared to control scaffolds. In vivo chemotaxis was evidenced by migration of tracer-labeled mesenchymal stem cells to the chemotactic functional scaffolds. Chemotactic functional scaffolds showed significantly increased angiogenesis in vivo. Successful bone regeneration was noted in the defects treated with chemotactic functional scaffolds and BMP-2.

CONCLUSIONS:

The authors' observations suggest that this bioengineered construct successfully acts as a chemoattractant for circulating mesenchymal stem cells because of controlled release of VEGF from the peptide amphiphile gels. The chemotactic functional scaffolds may play a role in the future design of clinically relevant bone graft substitutes for large-scale bone defects.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Osteogénesis / Regeneración / Cráneo / Proteínas Recombinantes / Factor A de Crecimiento Endotelial Vascular / Andamios del Tejido Tipo de estudio: Prognostic_studies Límite: Animals / Female / Humans Idioma: En Revista: Plast Reconstr Surg Año: 2021 Tipo del documento: Article
Texto completo
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Osteogénesis / Regeneración / Cráneo / Proteínas Recombinantes / Factor A de Crecimiento Endotelial Vascular / Andamios del Tejido Tipo de estudio: Prognostic_studies Límite: Animals / Female / Humans Idioma: En Revista: Plast Reconstr Surg Año: 2021 Tipo del documento: Article