Inflammatory effects of Salmonella typhimurium porins

Author:

Galdiero F1,Tufano M A1,Galdiero M1,Masiello S1,Di Rosa M1

Affiliation:

1. Istituto di Microbiologia, I Facoltà di Medicina e Chirurgia, Università di Napoli, Naples, Italy.

Abstract

The inflammatory activity of porins purified from Salmonella typhimurium has been investigated. Porins (0.3 to 30 micrograms) injected into the rat paw induced a dose-related edema that was not due to lipopolysaccharide contamination and did not appear to be dependent on the activation of the complement system. The edema induced by 30 micrograms of porins was comparable to that caused by 1 mg of carrageenin and was inhibited by indomethacin (5 mg/kg) and dexamethasone (0.1 mg/kg). Porins (1 to 10 micrograms/ml) induced a concentration-related release of histamine from rat peritoneal cells. These results are discussed in the light of the possible pathogenic role of porins in infections.

Publisher

American Society for Microbiology

Subject

Infectious Diseases,Immunology,Microbiology,Parasitology

Reference29 articles.

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4. Do porins inhibit macrophage phagocyting activity by stimulating the adenylate-cyclase;Di Donato A.;J. Cyclic Nucleotide Protein Phosphorylation Res.,1986

5. Studies of the mediators of the acute inflammatory response induced in rats in different sites by carrageenin and turpentine;Di Rosa M.;J. Pathol.,1971

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