Objective: This study aimed to determine the aryl hydrocarbon receptor (AhR) and transforming growth factor beta 1 (TGF-β1) expression levels in chronic rhinosinusitis (CRS) and their possible correlation with allergic state and tissue remodeling. Methods: Patients were enrolled and divided into the following groups: CRS without nasal polyps (NP) without allergic rhinitis (AR) (CRSsNPsAR; n = 20), CRS with NP with AR (CRSwNPwAR; n = 20), CRS with NP without AR (CRSwNPsAR; n = 20), and controls (n = 15). Tissue samples were analyzed by Masson trichrome staining for collagen, while the location and expression of AhR and TGF-β1 were analyzed by immunohistochemistry, quantitative reverse transcription polymerase chain reaction (qRT-PCR), and Western blotting. Results: The collagen amounts as well as AhR and TGF-β1 mRNA and protein expression levels were significantly increased in the CRSsNPsAR group compared with the CRSwNP (CRSwNPsAR and CRSwNPwAR) samples (p < 0.01). However, higher collagen amounts (p < 0.05) and higher TGF-β1 (p < 0.05) but lower AhR expression levels (p < 0.05) were detected in the CRSwNPwAR versus the CRSwNPsAR patients. Both AhR and TGF-β1 expression were positively correlated with the collagen level in CRS samples (p < 0.01). Conclusions: Elevated AhR expression may be involved in the progression of tissue remodeling in CRSsNPsAR similar to TGF-β1 expression. Conversely, lower AhR expression may be involved in allergic reactions in CRSwNPwAR.

Keywords:
Chronic rhinosinusitis, Nasal polyps, Allergic rhinitis, Aryl hydrocarbon receptor, Transforming growth factor beta 1
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2017
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