title: Reaction of peroxynitrite with hyaluronan and related saccharides.
abstract: The effects of peroxynitrite on hyaluronan has been studied by using an integrated spectroscopical approach, namely electron paramagnetic resonance (EPR), nuclear magnetic resonance (NMR), and mass spectrometry (MS). The reaction has been performed with the polymer, the tetrasaccharide oligomer as well as with the monosaccharides N-acetylglucosamine and glucuronic acid. The outcome of the presence of molecular oxygen and carbon dioxide has been also evaluated. Although 1H-NMR and ESI-MS experiments did not revealed peroxynitrite-mediated modification of hyaluronan as well as of related saccharides, from spin-trapping EPR experiments it was concluded that peroxynitrite induce the formation of C-centered carbon radicals, most probably by the way of its hydroxyl radical-like reactivity. These EPR data support the oxidative pathway involved in the degradation of hyaluronan, a probable event in the development and progression of rheumatoid arthritis.
authors.affiliation: Dipartimento di Chimica Organica e Biochimica, Università Federico II di Napoli, Complesso Universitario Monte S. Angelo Via Cynthia 4 80126, Napoli, Italy. corsaro@unina.it
authors.forename: Maria Michela
authors.initials: MM
authors.lastname: Corsaro
authors.forename: Donatella
authors.initials: D
authors.lastname: Pietraforte
authors.forename: Angela Serena
authors.initials: AS
authors.lastname: Di Lorenzo
authors.forename: Maurizio
authors.initials: M
authors.lastname: Minetti
authors.forename: Gennaro
authors.initials: G
authors.lastname: Marino
mesh_terms: D000117:Acetylglucosamine / Q000378:metabolism; D001172:Arthritis, Rheumatoid / Q000473:pathology; D001557:Benzenesulfonates / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D002245:Carbon Dioxide / Q000737:chemistry; D019281:Dimerization; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals; D008401:Gas Chromatography-Mass Spectrometry; D020723:Glucuronic Acid / Q000737:chemistry / Q000378:metabolism; D006027:Glycosides / Q000737:chemistry; D006820:Hyaluronic Acid / Q000737:chemistry / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008956:Models, Chemical; D009569:Nitric Oxide / Q000737:chemistry; D009603:Nitroso Compounds / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D030421:Peroxynitrous Acid / Q000737:chemistry / Q000378:metabolism*; D011134:Polysaccharides / Q000737:chemistry*; D019097:Spin Trapping
chemical_list: D001557:Benzenesulfonates; D005609:Free Radicals; D006027:Glycosides; D009603:Nitroso Compounds; D011134:Polysaccharides; D002245:Carbon Dioxide; D030421:Peroxynitrous Acid; D009569:Nitric Oxide; D002244:Carbon; C048757:3,5-dibromo-4-nitrosobenzenesulfonate; D020723:Glucuronic Acid; D006820:Hyaluronic Acid; D010100:Oxygen; D000117:Acetylglucosamine