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Titolo:
A Pseudomonas aeruginosa strain isolated from a Contact Lens-Induced AcuteRed Eye (CLARE) is protease-deficient
Autore:
Estrellas, PS; Alionte, LG; Hobden, JA;
Indirizzi:
Wayne State Univ, Sch Med, Dept Immunol & Microbiol, Detroit, MI 48201 USAWayne State Univ Detroit MI USA 48201 & Microbiol, Detroit, MI 48201 USA
Titolo Testata:
CURRENT EYE RESEARCH
fascicolo: 3, volume: 20, anno: 2000,
pagine: 157 - 165
SICI:
0271-3683(2000)20:3<157:APASIF>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORNEAL VIRULENCE; LASA PROTEASE; ELASTASE; IV; SUBSTITUTION; PURIFICATION; INFECTIONS; PROPEPTIDE; KERATITIS; PRECURSOR;
Keywords:
alkaline protease; contact lens-induced acute red eye (CLARE); elastase; Pseudomonas protease IV;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Hobden, JA Wayne State Univ, Sch Med, Dept Immunol & Microbiol, 540 E Canfield Ave, Detroit, MI 48201 USA Wayne State Univ 540 E Canfield Ave DetroitMI USA 48201 01 USA
Citazione:
P.S. Estrellas et al., "A Pseudomonas aeruginosa strain isolated from a Contact Lens-Induced AcuteRed Eye (CLARE) is protease-deficient", CURR EYE R, 20(3), 2000, pp. 157-165

Abstract

Purpose. Pseudomonas aeruginosa proteases are thought to be important virulence factors in the pathogenesis of corneal disease. This study examined protease production from two strains of P. aeruginosa responsible for two very distinct clinical diseases: strain Paer1, isolated from a Contact Lens-induced Acute Red Eye (CLARE), and strain KEI 1025, isolated from a corneal ulcer. Strains were compared to a laboratory strain (ATCC 19660) known to produce severe keratitis in experimentally infected mice for protease production and for ocular virulence. Methods. Protease production was examined with colorimetric assays, gelatin zymography and western blots. Elastase A activity was quantitated with a staphylolytic assay. Ocular virulence was examined using a mouse scratch model of keratitis. Results. In contrast to strains KEI 1025 or ATCC 19660, Paer1 was unable to produce enzymatically active elastase A, elastase, and protease IV. All three strains produced active alkaline protease. Strains KEI 1025 and ATCC 19660 produced a fulminant keratitis in mice whereas Paer1 produced a mild transient infection. Restoration of elastase activity in Paer1 via genetic complementation did not result in a virulent phenotype. Co-infection of mouse eyes with strains Paer1 and ATCC 19660 resulted in the eventual loss of Paer1 from corneal tissue. Conclusions. These studies suggest that P. aeruginosa elastase A and/or protease IV, but not alkaline protease or elastase, contribute to the ocular virulence of this organism.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 19:43:28