Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
In vivo stability of polyurethane-based electrospun vascular grafts in terms of chemistry and mechanics. / Gostev, Alexander A.; Shundrina, Inna K.; Pastukhov, Vitaliy I. и др.
в: Polymers, Том 12, № 4, 845, 01.04.2020.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - In vivo stability of polyurethane-based electrospun vascular grafts in terms of chemistry and mechanics
AU - Gostev, Alexander A.
AU - Shundrina, Inna K.
AU - Pastukhov, Vitaliy I.
AU - Shutov, Alexey V.
AU - Chernonosova, Vera S.
AU - Karpenko, Andrey A.
AU - Laktionov, Pavel P.
N1 - Publisher Copyright: © 2020 by the authors. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - The biostability of the polyurethanes Tecoflex EG-80A and Pellethane 2363-80A, used as basic polymers of the vascular grafts (VGs) produced by electrospinning, as well as the tensile strength of Tecoflex VGs, are studied. Solutions of Tecoflex or Pellethane with gelatin and bivalirudin in 1,1,1,3,3,3-hexafluoroisopropanol are used for VG production. After 1, 12, and 24 weeks of VG implantation in the infrarenal position of the abdominal aorta ofWistar rats, VGs are explanted, fixed in formalin, freed from outer tissues, dialyzed, and dried. The polyurethanes are extracted from VGs by dispersion/extraction in tetrahydrofuran (THF) and freed from the excess of THF-insoluble biopolymers. The stability of polyurethanes is assessed by IR spectroscopy and gel permeation chromatography. Pellethane has emerged to be stable at all experimental points. Tecoflex loses approximately 10% of its molecular weight (both Mn and Mw) after 3 months and restored its initial value within 6 months of its functioning as a graft. Mechanical testing demonstrates a 30% reduction in the tensile strength after 3 months in VG and a 10% increase after 6 months. The stability and mechanical properties of polyurethane-based VGs demonstrate their utility for the reconstitution of damaged arteries.
AB - The biostability of the polyurethanes Tecoflex EG-80A and Pellethane 2363-80A, used as basic polymers of the vascular grafts (VGs) produced by electrospinning, as well as the tensile strength of Tecoflex VGs, are studied. Solutions of Tecoflex or Pellethane with gelatin and bivalirudin in 1,1,1,3,3,3-hexafluoroisopropanol are used for VG production. After 1, 12, and 24 weeks of VG implantation in the infrarenal position of the abdominal aorta ofWistar rats, VGs are explanted, fixed in formalin, freed from outer tissues, dialyzed, and dried. The polyurethanes are extracted from VGs by dispersion/extraction in tetrahydrofuran (THF) and freed from the excess of THF-insoluble biopolymers. The stability of polyurethanes is assessed by IR spectroscopy and gel permeation chromatography. Pellethane has emerged to be stable at all experimental points. Tecoflex loses approximately 10% of its molecular weight (both Mn and Mw) after 3 months and restored its initial value within 6 months of its functioning as a graft. Mechanical testing demonstrates a 30% reduction in the tensile strength after 3 months in VG and a 10% increase after 6 months. The stability and mechanical properties of polyurethane-based VGs demonstrate their utility for the reconstitution of damaged arteries.
KW - Electrospinning
KW - Gelatin
KW - Pellethane
KW - Polyurethane stability in vivo
KW - Tecoflex
KW - Vascular grafts
KW - BIOCOMPATIBILITY
KW - vascular grafts
KW - polyurethane stability in vivo
KW - tecoflex
KW - electrospinning
KW - FABRICATION
KW - pellethane
KW - ALBUMIN
KW - SCAFFOLDS
KW - BIOSTABILITY
KW - NEW-GENERATION
KW - gelatin
UR - http://www.scopus.com/inward/record.url?scp=85086627614&partnerID=8YFLogxK
U2 - 10.3390/POLYM12040845
DO - 10.3390/POLYM12040845
M3 - Article
C2 - 32272564
AN - SCOPUS:85086627614
VL - 12
JO - Polymers
JF - Polymers
SN - 2073-4360
IS - 4
M1 - 845
ER -
ID: 24537644