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Lipopolysaccharide-induced expression of inducible nitric oxide synthase in the guinea pig organ of Corti
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences. (Oto-Rhino-Laryngology, Head & Neck Surgery)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences. (Oto-Rhino-Laryngology, Head & Neck Surgery)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences. (Oto-Rhino-Laryngology, Head & Neck Surgery)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences. (Oto-Rhino-Laryngology, Head & Neck Surgery)
2000 (English)In: Hearing Research, ISSN 0378-5955, E-ISSN 1878-5891, Vol. 140, no 1-2, 91-8 p.Article in journal (Refereed) Published
Abstract [en]

The purpose of the investigation was to ascertain whether inoculation of bacterial lipopolysaccharide (LPS) into the cochlea of the guinea pig could elicit formation of inducible nitric oxide synthase (iNOS). Immunohistochemical study revealed that immunoreactivity to iNOS was seen below outer hair cells representing nerve fibers and synaptic nerve endings. iNOS-staining could also be observed in phalangeal dendrites of Deiter's cells pointing to the cuticular membrane, Hensen's cells and on stria vascularis 48 h after inoculation with LPS. Immunohistochemical investigation with a specific anti-nitrotyrosine antibody also revealed intense immunoreactivity identical to that of iNOS, suggesting formation of peroxynitrite in the organ of Corti by the reaction of NO with O(2)(-). On the basis of these findings, it can be concluded that NO together with O(2)(-), which form the more reactive peroxynitrite, are the most important pathogenic agents in LPS-induced damage of cochlea in the guinea pig.

Place, publisher, year, edition, pages
2000. Vol. 140, no 1-2, 91-8 p.
Keyword [en]
Nitric oxide, Inducible nitric oxide synthase, Bacterial lipopolysaccharide, Organ of Corti, Immunohistochemistry, Guinea pig
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-58496DOI: 10.1016/S0378-5955(99)00188-4PubMedID: 10675637OAI: oai:DiVA.org:uu-58496DiVA: diva2:86405
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2017-12-01Bibliographically approved

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