Abstract
Chronic rhinosinusitis with nasal polyps (CRSwNP) is one of the most frequently encountered chronic nasal diseases with a significant impact on patient quality of life. The aim of our study was therefore to investigate the association between the POSTN, IL-4, and IL-13 gene expression and the nasal polyp development. The objective of this study was to determine differential expression of POSTN, IL-4, and IL-13 genes in the mucosa and polyps of 63 patients with CRSwNP and 23 chronic rhinosinusitis (CRS) without nasal polyps (CRSsNP) when compared with patients with nasal septum deviation (n=18) who were used as controls. The expression level was investigated using reverse transcription–polymerase chain reaction assays in the polyp tissue and the mucosa of paranasal sinus collected while undergoing functional endoscopic sinus surgery. Expression of the mRNAs of all three genes, IL-4, IL-13, and POSTN, was significantly greater in the paired tissues of CRS patients with NPs or without NPs than in control subjects, with highest levels of POSTN and IL-13 seen in CRSwNP. An increased level of POSTN, IL-4, and IL-13 gene expression may be related to the development of chronic rhinosinusitis with nasal polyps, but polyp formation seemed to be associated especially with POSTN and IL-13 expression.
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