title: Quantitative grafting of peptide onto the nontoxic biodegradable waterborne polyurethanes to fabricate peptide modified scaffold for soft tissue engineering.
abstract: Gly-Arg-Gly-Asp-Ser-Pro (GRGDSP) peptide has frequently been used in the biomedical materials to enhance adhesion and proliferation of cells. In this work, we modified the nontoxic biodegradable waterborne polyurethanes (WBPU) with GRGDSP peptide and fabricated 3-D porous scaffold with the modified WBPU to investigate the effect of the immobilized GRGDSP peptide on human umbilical vein endothelial cells (HUVECs) adhesion and proliferation. A facile and reliable approach was first developed to quantitative grafting of GRGDSP onto the WBPU molecular backbone using ethylene glycol diglycidyl ether (EX810) as a connector. Then 3-D porous WBPU scaffolds with various GRGDSP content were fabricated by freeze-drying the emulsion. In both of the HUVECs adhesion and proliferation tests, enhanced cell performance was observed on the GRGDSP grafted scaffolds compared with the unmodified scaffolds and the tissue culture plate (TCP). The adhesion rate and proliferation rate increased with the increase of GRGDSP content in the scaffold and reached a maximum with peptide concentration of 0.85 μmol/g based on the weight of the polyurethanes. These results illustrate the necessity of the effective control of the GRGDSP content in the modified WBPU and support the potential utility of these 3-D porous modified WBPU scaffolds in the soft tissue engineering to guide cell adhesion, proliferation and tissue regeneration.
authors.affiliation: College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, China.
authors.forename: Xia
authors.initials: X
authors.lastname: Jiang
authors.forename: Kunjie
authors.initials: K
authors.lastname: Wang
authors.forename: Mingming
authors.initials: M
authors.lastname: Ding
authors.forename: Jiehua
authors.initials: J
authors.lastname: Li
authors.forename: Hong
authors.initials: H
authors.lastname: Tan
authors.forename: Zhigao
authors.initials: Z
authors.lastname: Wang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Fu
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D002448:Cell Adhesion; D049109:Cell Proliferation; D002470:Cell Survival; D002478:Cells, Cultured; D004577:Electron Probe Microanalysis / Q000379:methods; D004730:Endothelium, Vascular / Q000166:cytology; D006801:Humans; D010455:Peptides / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D016062:Porosity; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013997:Time Factors; D023822:Tissue Engineering / Q000379:methods*; D014471:Umbilical Veins / Q000166:cytology; D014867:Water / Q000737:chemistry
chemical_list: D001672:Biocompatible Materials; D010455:Peptides; D011140:Polyurethanes; D014867:Water