Trichinella spiralis infection affects p47(phox) protein expression in guinea-pig alveolar macrophages.
To establish whether NADPH oxidase activation, responsible for previously demonstrated Trichinella spiralis-induced respiratory burst, results from assembling of membrane and cytosolic NADPH oxidase components and/or increased expression of the oxidase complex proteins, the superoxide anion production and expression of the regulatory p47(phox) subunit were measured in cultured alveolar macrophages obtained during T. spiralis infection of guinea pigs. The results demonstrate for the first time helminth parasite-infection-induced stimulation of NADPH oxidase p47(phox) subunit protein expression, with the effect being decreased by in vivo treatment with cyclosporin A, previously shown to inhibit T. spiralis infection-induced respiratory burst in guinea-pig alveolar macrophages. However, although the expression of the p47(phox) subunit protein remained induced during secondary infection, it was accompanied by superoxide anion production that was significantly suppressed in comparison with that observed during primary infection, suggesting suppressive action of T. spiralis on host's alveolar macrophage immune response, presumably connected with NADPH oxidase complex activity attenuation.
Dzik
Jolanta M
JM
Nencki Institute of Experimental Biology, Polish Academy of Sciences, 3 Pasteur St., 02-093 Warszawa, Poland.
Zieliński
Zbigniew
Z
Gołos
Barbara
B
Wałajtys-Rode
Elzbieta
E
D000818:Animals; D002478:Cells, Cultured; D016572:Cyclosporine / Q000494:pharmacology; D006168:Guinea Pigs; D007166:Immunosuppressive Agents / Q000494:pharmacology; D016676:Macrophages, Alveolar / Q000187:drug effects / Q000378:metabolism / Q000469:parasitology*; D019255:NADPH Oxidases / Q000378:metabolism; D010750:Phosphoproteins / Q000096:biosynthesis*; D016897:Respiratory Burst; D013481:Superoxides / Q000378:metabolism; D017160:Trichinella spiralis / Q000502:physiology*
D007166:Immunosuppressive Agents; D010750:Phosphoproteins; D013481:Superoxides; D016572:Cyclosporine; D019255:NADPH Oxidases; C060505:neutrophil cytosolic factor 1