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Detection of nitric oxide in the guinea pig inner ear, using a combination of aldehyde fixative and 4,5-diaminofluorescein diacetate
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences. (Ear-Nose-Throat)
2001 (English)In: Acta Oto-Laryngologica, ISSN 0001-6489, Vol. 121, no 4, 460-4 p.Article in journal (Refereed) Published
Abstract [en]

Localization of nitric oxide (NO) production sites in the inner ear of the guinea pig was investigated using a combination of glutaraldehyde fixative and a new fluorescence NO indicator. 4,5-diaminofluorescein diacetate (DAF-2DA). The cochlea and vestibular end organs were examined to locate NO production sites. The fluorescence persisted after glutaraldehyde fixation and embedding with water-soluble resin. NO production in the cochlea was observed in the outer and inner hair cells, nerve endings, nerve fibers and supporting cells of the organ of Corti, stria vascularis, spiral ligament, ganglion cells, etc. In the vestibular end organs, both type I and type II sensory cells, nerve fibers, blood vessels and dark cells displayed fluorescence. This localization was exactly identical to that of NO synthase. Thus, detection of intracellular NO production by using a combination of glutaraldehyde fixation and DAF-2DA is useful for examining the function of NO in cells, both in situ and in vivo.

Place, publisher, year, edition, pages
2001. Vol. 121, no 4, 460-4 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-63373PubMedID: 11508504OAI: oai:DiVA.org:uu-63373DiVA: diva2:91284
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2010-02-19Bibliographically approved

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