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ENGLISH ABSTRACT
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
[The role of chemokines in nasal polyps].
Nasal polyposis is an inflammatory condition of the nose and the sinuses characterised by a marked infiltration of eosinophils in addition to lymphocytes, mast cells and macrophages. The selective recruitment of eosinophils to inflammatory sites is mediated by CC chemokines such as Eotaxin and Eotaxin-2. In the present study histology, immunohistochemistry and ELISA were performed. The levels of Eotaxin and Eotaxin-2 and for comparison other chemokines RANTES and IL-8 were measured in nasal polyp tissue and in control nasal tissue. On histological examination 6 polyps showed an oedematous structure, one was glandular and one had a fibromatous pattern, while all showed a marked eosinophil infiltration. Immunohistochemistry of the polyps showed that epithelial cells were strongly positive for Eotaxin and IL-8, whereas endothelial cells stained positive for Eotaxin-2. Significantly higher amounts of Eotaxin, Eotaxin-2 and IL-8 were detected in polyp tissue when compared with control middle turbinates. The increased levels of eosinophil-stimulating chemokines, such as Eotaxin and Eotaxin-2 in nasal polyps suggest that they may be important regulators of eosinophil recruitment in this inflammatory disease.
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