title: Modulating in vitro bone cell and macrophage behavior by immobilized enzymatically tailored pectins.
abstract: Previous work has reported the results of a multidisciplinary effort producing a proof-of-concept on the use of pectic polysaccharides in the surface modification of medical devices. This study was designed to learn more about the capability of engineered rhamnogalacturonan-I (RG-I) fractions of apple pectin to control bone cell and macrophage behavior. Thermanox or polystyrene Petri dishes were surface modified with two different modified hairy regions (MHRs) obtained by different enzymatic liquefaction processes of apples differing in relative amounts and lengths of their neutral side chains: (long-haired) MHR-alpha and (short-haired) MHR-B. Bone explants from 14-day-old chick embryos were cultured for 14 days on both pectic substrata. MHR-B promoted cell migration and differentiation, MHR-alpha did not. On MHR-alpha, J774.2 macrophages grew well, their percentage in G1 phase was decreased and in S phase increased, and they did not secrete either proinflammatory-cytokines or nitrites. Contrasting results were gained from macrophages on MHR-B, except for nitrite secretion. Thus, we conclude that coatings from tailored pectins show different biological activities in vitro and are potential innovative candidates for improving the biocompatibility of medical devices in various applications.
authors.affiliation: Domaine Biomatériaux-Biocompatibilité, UMR CNRS 6600, Université de Technologie de Compiègne, France.
authors.forename: Cyrill
authors.initials: C
authors.lastname: Bussy
authors.forename: René
authors.initials: R
authors.lastname: Verhoef
authors.forename: Ash
authors.initials: A
authors.lastname: Haeger
authors.forename: Marco
authors.initials: M
authors.lastname: Morra
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Duval
authors.forename: Pascale
authors.initials: P
authors.lastname: Vigneron
authors.forename: Anne
authors.initials: A
authors.lastname: Bensoussan
authors.forename: Elodie
authors.initials: E
authors.lastname: Velzenberger
authors.forename: Giovanna
authors.initials: G
authors.lastname: Cascardo
authors.forename: Clara
authors.initials: C
authors.lastname: Cassinelli
authors.forename: Henk
authors.initials: H
authors.lastname: Schols
authors.forename: J Paul
authors.initials: JP
authors.lastname: Knox
authors.forename: Marie-Danielle
authors.initials: MD
authors.lastname: Nagel
mesh_terms: D000818:Animals; D002453:Cell Cycle; D002465:Cell Movement; D049109:Cell Proliferation; D048430:Cell Shape; D002642:Chick Embryo; D004800:Enzymes, Immobilized / Q000378:metabolism*; D066298:In Vitro Techniques; D008264:Macrophages / Q000166:cytology*; D051379:Mice; D010368:Pectins / Q000378:metabolism*; D011137:Polystyrenes / Q000378:metabolism; D013977:Tibia / Q000166:cytology* / Q000196:embryology / Q000648:ultrastructure; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D004800:Enzymes, Immobilized; D011137:Polystyrenes; D014409:Tumor Necrosis Factor-alpha; C042491:rhamnogalacturonan I; D010368:Pectins