Abstract:
BACKGROUND:The etiology of the intense inflammatory response showed by patients with allergic fungal rhinosinusitis (AFRS) remains a mystery. Potential sources of this inflammation may include fungal proteases. Protease-activated receptors (PARs) are components of the innate immune response that are modulated by proteolytic activity and are involved in potentiating T helper 2 (Th2) responses. The objective of the study was to determine whether there is differential expression of PARs in patients with AFRS compared to controls. METHODS:The study was designed as a comparison of gene expression profiles in patients with AFRS vs diseased and nondiseased controls. Twenty-five patients were enrolled. Patients with AFRS (n = 15) were compared to nondiseased controls (n = 5) undergoing minimally invasive pituitary surgery (MIPS) and patients with chronic rhinosinusitis with nasal polyps (CRSwNP, n = 5) undergoing functional endoscopic sinus surgery (FESS). Ethmoid mucosa RNA was hybridized to 4 × 44 K microarray chips. Four gene probes (PAR1, PAR2, PAR3, and PAR4) were used to assess for differential expression. A linear-mixed model was used to account for some patients having multiple samples. Significance level was determined at p < 0.05. RESULTS:Of the 4 probes, only PAR3 showed statistically significant differential expression between AFRS and nondiseased control samples (p = 0.03) as well as a 2.21-fold change. No additional statistical difference in PAR expression among the comparison groups was noted. CONCLUSION:PARs have been shown to enhance production of inflammatory cytokines and potentiate Th2 responses. In this initial report, patients with AFRS have a significantly increased expression of PAR3 compared to nondiseased controls.
journal_name
Int Forum Allergy Rhinoljournal_title
International forum of allergy & rhinologyauthors
Ebert CS Jr,McKinney KA,Urrutia G,Wu M,Rose AS,Fleischman GM,Thorp B,Senior BA,Zanation AMdoi
10.1002/alr.21295subject
Has Abstractpub_date
2014-04-01 00:00:00pages
266-71issue
4eissn
2042-6976issn
2042-6984journal_volume
4pub_type
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