Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/47258
Título: Toxicity of nitric oxide and peroxynitrite to Photobacterium damselae subsp. piscicida
Autores/as: Acosta, F. 
Real Valcárcel, Fernando 
Ruiz De Galarreta, C. M.
Díaz, R.
Padilla, D. 
Ellis, A. E.
Palabras clave: Seabream Sparus-Aurata
Pasteurella-Piscicida
Capsular Polysaccharide
Superoxide-Dismutase
Reactive Oxygen, et al.
Fecha de publicación: 2003
Editor/a: 1050-4648
Publicación seriada: Fish and Shellfish Immunology 
Resumen: Virulent strains of Photobacterium damselae subsp. piscieida (Pap) were grown in media with or without glucose supplementation (to enhance polysaccharide capsule formation) and the bactericidal action of nitric oxide (NO) and peroxynitrites was evaluated in a cell-free assay. Treatment with the NO-donor S-nitroso-acetyl-penicillamine (SNAP) induced a dose-and time-dependent decrease in Pdp survival. This effect was greater for strains grown without glucose supplementation (C forms) than for their counterparts grown with glucose supplementation (C+ forms). Addition of superoxide anion (O-2(-)) generating systems (Xanthine/Xanthine oxidase, glucose/glucose oxidase) to the culture media further enhanced the bactericidal effect of NO. A similar bactericidal effect, with the same pattern of sensitivity, was observed when C+ and C forms of the bacteria were treated with 3-morpholino-sydonimide hydrochloride (SIN-1), a compound which simultaneously generates NO and O-2(-). Addition of superoxide dismutase (SOD) or SOD plus catalase (CAT) did not fully reverse the toxic action of SIN-1 and the bactericidal effect was similar for both C and C+ forms suggesting that while NO alone is sufficient to cause damage in all strains of the pathogen tested, growth in glucose supplemented medium enhanced protection to reactive oxygen intermediates rather than NO. (C) 2003 Elsevier Ltd. All rights reserved.
URI: http://hdl.handle.net/10553/47258
ISSN: 1050-4648
DOI: 10.1016/S1050-4648(02)00163-8
Fuente: Fish and Shellfish Immunology[ISSN 1050-4648],v. 15, p. 241-248
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