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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Immunohistochemical localization of nitric oxide synthase activity in upper respiratory epithelium.

Nitric oxide (NO) production in the respiratory epithelium of the upper airways has recently been described. To better delineate the role of epithelial NO, the authors of this study attempted to identify the cell type responsible for the production of NO in rat tracheal epithelium and human nasal epithelium. They localized the activity of NO through immunohistochemical analysis with an antibody to L-citrulline, a marker for activity of the L-arginine-dependent nitric oxide synthase (NOS) pathway. Using anti- inducible NOS ( iNOS) and anti- constitutive NOS ( cNOS) antibodies, they also attempted to identify the specific NO isotypes that were present. The tracheal and nasal epithelium demonstrated strong immunoreactivity to citrulline in ciliated cells. The ciliated cells of the nasal turbinates demonstrated strong iNOS positivity, but no significant cNOS immunoreactivity. The study findings that iNOS activity is present in ciliated epithelial cells of rat and human upper respiratory epithelium suggest that NO may play a role in epithelial homeostasis and could potentially play a role in the pathogenesis of mucociliary dysfunction.[1]

References

  1. Immunohistochemical localization of nitric oxide synthase activity in upper respiratory epithelium. Rosbe, K.W., Mims, J.W., Prazma, J., Petrusz, P., Rose, A., Drake, A.F. Laryngoscope (1996) [Pubmed]
 
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