title: Arginine-glycine-glutamine and serine-isoleucine-lysine-valine-alanine-valine modified poly(l-lactide) films: bioactive molecules used for surface grafting to guide cellular contractile phenotype.
abstract: Tissue engineering is defined as "an interdisciplinary field that applies the principles of engineering and life sciences toward the development of biological substitutes that restore, maintain, or improve tissue function." The biological substitutes can be developed with the help of natural or synthetic materials. Polymeric materials are primarily used, because of the high variability in mechanical, physical, and chemical properties. Biodegradable polymers are object of the majority of studies, because of the ability to be degraded by the host organism, avoiding late stent thrombosis unlike permanent grafts. Poly-l-lactide acid (PLLA) is one of the most used polymers in research. In order to improve the material's bioactivity, in this work, PLLA surface was modified by grafted arginine-glycine-glutamine (RGD), a fibronectin derived adhesion motif, and serine-isoleucine-lysine-valine-alanine-valine (SIKVAV), a laminin derived motif, and rat cardiac (H9C2) and mouse (C2C12) myoblasts proliferation and differentiation on modified PLLA were evaluated. In order to verify the surface modification, x-ray photoelectron spectroscopy analysis was performed. After seeding, cells' viability was confirmed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay while proliferating cell nuclear antigen expression was used to investigate cell proliferation. Myf5, Myogenin and Myosin heavy chain were used to analyze cell differentiation. Moreover, RGD peptide slightly inhibited rat myoblast (H9C2) proliferation, whereas less strong effect was observed on C2C12. However, both cell lines showed to enhance the contractile phenotype in the presence of SIKVAV peptides. These results suggest that bioactive molecules grafting could be useful on polymeric scaffolds for guiding cell phenotype expression, and, to ultimately maintain adequate biological characteristics suitable for the tissue functional regeneration.
authors.affiliation: Human Anatomy Laboratory, Department of Health Sciences, University of Piemonte Orientale "A. Avogadro", 28100 Novara, Italy.
authors.forename: Francesca
authors.initials: F
authors.lastname: Boccafoschi
authors.affiliation: Human Anatomy Laboratory, Department of Health Sciences, University of Piemonte Orientale "A. Avogadro", 28100 Novara, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Fusaro
authors.affiliation: Human Anatomy Laboratory, Department of Health Sciences, University of Piemonte Orientale "A. Avogadro", 28100 Novara, Italy.
authors.forename: Margherita
authors.initials: M
authors.lastname: Botta
authors.affiliation: Human Anatomy Laboratory, Department of Health Sciences, University of Piemonte Orientale "A. Avogadro", 28100 Novara, Italy.
authors.forename: Martina
authors.initials: M
authors.lastname: Ramella
authors.affiliation: Laboratory for Biomaterials and Bioengineering, Department of Min-Met-Materials Engineering, Laval University and University Hospital Research Center, Quebec City, G1V 0A6, Canada.
authors.forename: Pascale
authors.initials: P
authors.lastname: Chevallier
authors.affiliation: Laboratory for Biomaterials and Bioengineering, Department of Min-Met-Materials Engineering, Laval University and University Hospital Research Center, Quebec City, G1V 0A6, Canada.
authors.forename: Diego
authors.initials: D
authors.lastname: Mantovani
authors.affiliation: Human Anatomy Laboratory, Department of Health Sciences, University of Piemonte Orientale "A. Avogadro", 28100 Novara, Italy.
authors.forename: Mario
authors.initials: M
authors.lastname: Cannas
mesh_terms: D020816:Amino Acid Motifs; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry / Q000494:pharmacology; D002454:Cell Differentiation / Q000187:drug effects; D002460:Cell Line; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D005353:Fibronectins / Q000737:chemistry*; D051379:Mice; D051787:Myogenic Regulatory Factor 5 / Q000378:metabolism; D009842:Oligopeptides / Q000737:chemistry*; D010641:Phenotype; D056951:Photoelectron Spectroscopy; D011091:Polyesters / Q000737:chemistry* / Q000494:pharmacology; D051381:Rats; D013499:Surface Properties; D023822:Tissue Engineering
chemical_list: D001672:Biocompatible Materials; D005353:Fibronectins; D051787:Myogenic Regulatory Factor 5; D009842:Oligopeptides; D011091:Polyesters; C033616:poly(lactide); C047981:arginyl-glycyl-aspartic acid