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| http://purl.uniprot.org/citations/17316569 | http://www.w3.org/2000/01/rdf-schema#comment | "The adaptive immune system plays an important role in host defense against invading micro-organisms. Yet, mice deficient in T- and B-cells are surprisingly healthy and develop few spontaneous infections when raised under specific pathogen-free conditions (SPF). The objective of this study was to ascertain what role phagocyte-associated NADPH oxidase or myeloperoxidase (MPO) plays in host defense in mice lacking both T- and B-cells. To do this, we generated lymphopenic mice deficient in either NADPH oxidase or MPO by crossing gp91(phox)-deficient (gp91 ko) or MPO ko mice with mice deficient in recombinase activating gene-1 (RAG ko). We found that neither gp91 ko, MPO ko mice nor lymphocyte-deficient RAG ko mice developed spontaneous infections when raised under SPF conditions and all mice had life spans similar to wild-type (WT) animals. In contrast, gp91xRAG double-deficient (DKO) but not MPOxRAG DKO mice developed spontaneous multi-organ bacterial and fungal infections early in life and lived only a few months. Infections in the gp91xRAG DKO mice were characterized by granulomatous inflammation of the skin, liver, heart, brain, kidney, and lung. Addition of antibiotics to the drinking water attenuated the spontaneous infections and increased survival of the mice. Oyster glycogen-elicited polymorphonuclear neutrophils (PMNs) and macrophages obtained from gp91 ko and gp91xRAG DKO mice had no detectable NADPH oxidase activity whereas WT, RAG ko, and MPOxRAG DKO PMNs and macrophages produced large and similar amounts of superoxide in response to phorbol myristate acetate. The enhanced mortality of the gp91xRAG DKO mice was not due to defects in inflammatory cell recruitment or NO synthase activity (iNOS) as total numbers of elicited PMNs and macrophages as well as PMN- and macrophage-derived production of nitric oxide-derived metabolites in these mice were similar and not reduced when compared to that of WT mice. Taken together, our data suggest that that NADPH oxidase but not MPO (nor iNOS) is required for host defense in lymphopenic mice and that lymphocytes and NADPH oxidase may compensate for each other's deficiency in providing resistance to spontaneous bacterial infections."xsd:string |
| http://purl.uniprot.org/citations/17316569 | http://purl.org/dc/terms/identifier | "doi:10.1016/j.bbrc.2007.02.029"xsd:string |
| http://purl.uniprot.org/citations/17316569 | http://purl.uniprot.org/core/author | "Shukla D."xsd:string |
| http://purl.uniprot.org/citations/17316569 | http://purl.uniprot.org/core/author | "Barlow S."xsd:string |
| http://purl.uniprot.org/citations/17316569 | http://purl.uniprot.org/core/author | "Grisham M.B."xsd:string |
| http://purl.uniprot.org/citations/17316569 | http://purl.uniprot.org/core/author | "Ostanin D.V."xsd:string |
| http://purl.uniprot.org/citations/17316569 | http://purl.uniprot.org/core/date | "2007"xsd:gYear |
| http://purl.uniprot.org/citations/17316569 | http://purl.uniprot.org/core/name | "Biochem Biophys Res Commun"xsd:string |
| http://purl.uniprot.org/citations/17316569 | http://purl.uniprot.org/core/pages | "801-806"xsd:string |
| http://purl.uniprot.org/citations/17316569 | http://purl.uniprot.org/core/title | "NADPH oxidase but not myeloperoxidase protects lymphopenic mice from spontaneous infections."xsd:string |
| http://purl.uniprot.org/citations/17316569 | http://purl.uniprot.org/core/volume | "355"xsd:string |
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