Gelatin-polytrimethylene carbonate blend based electrospun tubular construct as a potential vascular biomaterial.

Autor: Joy J; Bioengineering Laboratory, Department of Textile Technology, Indian Institute of Technology, New Delhi 110016, India; Centre for Biomedical Engineering, Indian Institute of Technology, New Delhi 110016, India., Aid-Launais R; INSERM, U1148, LVTS, Université Paris 13, Université Paris Diderot, Sorbonne Paris Cité, Hôpital Bichat, 46 rue Henri Huchard, 75877 Paris Cedex 18, France., Pereira J; INSERM, U1148, LVTS, Université Paris 13, Université Paris Diderot, Sorbonne Paris Cité, Hôpital Bichat, 46 rue Henri Huchard, 75877 Paris Cedex 18, France., Pavon-Djavid G; INSERM, U1148, LVTS, Université Paris 13, Université Paris Diderot, Sorbonne Paris Cité, Hôpital Bichat, 46 rue Henri Huchard, 75877 Paris Cedex 18, France., Ray AR; Centre for Biomedical Engineering, Indian Institute of Technology, New Delhi 110016, India., Letourneur D; INSERM, U1148, LVTS, Université Paris 13, Université Paris Diderot, Sorbonne Paris Cité, Hôpital Bichat, 46 rue Henri Huchard, 75877 Paris Cedex 18, France., Meddahi-Pellé A; INSERM, U1148, LVTS, Université Paris 13, Université Paris Diderot, Sorbonne Paris Cité, Hôpital Bichat, 46 rue Henri Huchard, 75877 Paris Cedex 18, France., Gupta B; Bioengineering Laboratory, Department of Textile Technology, Indian Institute of Technology, New Delhi 110016, India. Electronic address: bgupta@textile.iitd.ernet.in.
Jazyk: angličtina
Zdroj: Materials science & engineering. C, Materials for biological applications [Mater Sci Eng C Mater Biol Appl] 2020 Jan; Vol. 106, pp. 110178. Date of Electronic Publication: 2019 Sep 10.
DOI: 10.1016/j.msec.2019.110178
Abstrakt: The present work details the fabrication of electrospun tubular scaffolds based on the biocompatible and unexploited blend of gelatin and polytrimethylene carbonate (PTMC) as a media (middle layer of blood vessel) equivalent for blood vessel regeneration. An attempt to resemble the media stimulated the selection of gelatin as a matrix (substitution for collagen) with the inclusion of the biodegradable elastomer PTMC (substitution for elastin). -The work highlights the variation of electrospinning parameters and its assiduous selection based on fiber diameter distribution and pore size distribution to obtain smooth microfibers and micropores which is reported for the first time for this blend. Electrospun conduits of gelatin-PTMC blend had fibers sized 6-8 μm and pores sized ~100-150 μm. Young's modulus of 0.40 ± 0.045 MPa was observed, resembling the tunica media of the native artery (~0.5 MPa). An evaluation of the surface properties, topography, and mechanical properties validated its physical requirements for inclusion in a vascular graft. Preliminary biological tests confirmed its minimal in-vitro toxicity and in-vivo biocompatibility. MTT assay (indirect) elucidated cell viability above 70% with scaffold extract, considered to be non-toxic according to the EN ISO-10993-5/12 protocol. The in-vivo subcutaneous implantation in rat showed a marked reduction in macrophages within 15 days revealing its biocompatibility and its possibility for host integration. This comprehensive study presents for the first time the potential of microporous electrospun gelatin and PTMC blend based tubular construct as a potential biomaterial for vascular tissue engineering. The proposed media equivalent included in a bilayer or trilayer polymeric construct can be a promising off-shelf vascular graft.
(Copyright © 2019. Published by Elsevier B.V.)
Databáze: MEDLINE
Externí odkaz: