title: Is dialdehyde starch a valuable cross-linking agent for collagen/elastin based materials?
abstract: Collagen and elastin are the main structural proteins in mammal bodies. They provide mechanical support, strength, and elasticity to various organs and tissues, e.g. skin, tendons, arteries, and bones. They are readily available, biodegradable, biocompatible and they stimulate cell growth. The physicochemical properties of collagen and elastin-based materials can be modified by cross-linking. Glutaraldehyde is one of the most efficient cross-linking agents. However, the unreacted molecules can be released from the material and cause cytotoxic reactions. Thus, the aim of our work was to investigate the influence of a safer, macromolecular cross-linking agent--dialdehyde starch (DAS). The properties of hydrogels based on collagen/elastin mixtures (95/5, 90/10) containing 5 and 10% of DAS and neutralized via dialysis against deionized water were tested. The homogenous, transparent, stiff hydrogels were obtained. The DAS addition causes the formation of intermolecular cross-linking bonds but does not affect the secondary structure of the proteins. As a result, the thermal stability, mechanical strength, and, surprisingly, swelling ability increased. At the same time, the surface properties test and in vitro study show that the materials are attractive for 3T3 cells. Moreover, the materials containing 10% of DAS are more resistant to enzymatic degradation.
authors.affiliation: Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100, Toruń, Poland. joanna@chem.umk.pl.
authors.forename: J
authors.initials: J
authors.lastname: Skopinska-Wisniewska
authors.affiliation: Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100, Toruń, Poland.
authors.forename: K
authors.initials: K
authors.lastname: Wegrzynowska-Drzymalska
authors.affiliation: Collegium Medicum, Nicolaus Copernicus University in Torun, Karlowicza 24, 85-092, Bydgoszcz, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Bajek
authors.affiliation: Collegium Medicum, Nicolaus Copernicus University in Torun, Karlowicza 24, 85-092, Bydgoszcz, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Maj
authors.affiliation: Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100, Toruń, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Sionkowska
mesh_terms: D016475:3T3 Cells; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry; D002236:Carbohydrate Conformation; D002465:Cell Movement; D003094:Collagen / Q000737:chemistry*; D004549:Elastin / Q000737:chemistry*; D051379:Mice; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000031:analogs & derivatives* / Q000737:chemistry
chemical_list: D001672:Biocompatible Materials; D013213:Starch; D003094:Collagen; D004549:Elastin; C012880:dialdehyde starch