Document Detail

Increased percentage of mast cells within sinonasal mucosa of chronic rhinosinusitis with nasal polyp patients independent of atopy.
MedLine Citation:
PMID:  22344928     Owner:  NLM     Status:  Publisher    
BACKGROUND: Initial attention on the pathophysiology of chronic rhinosinusitis (CRS) has focused on eosinophils. Other immune cells such as mast cells (MCs) have been identified and appear to be elevated in CRS with nasal polyp (NP) patients. MCs are commonly linked to immunoglobulin E (IgE)-mediated inflammatory changes characterized by elevated T helper 2 cytokines. Although atopy is a common comorbid condition with CRS, the objective of this study was to determine if elevated MCs are linked primarily to atopic status in CRS patients and to understand the significance of MCs in the pathophysiology of CRS. METHODS: Ethmoid sinonasal mucosa from patients undergoing endoscopic sinus surgery was harvested from 3 groups: healthy control (HC), CRS without NP (CRSsNP), and CRS with NP (CRSwNP) and analyzed by flow cytometry to quantify CD117(+) /CD203c(+) MCs and CRTH2(+) CD4(+) T cells. Relative expression of prostaglandin D(2) synthase in ethmoid mucosa was determined by quantitative real-time polymerase chain reaction (PCR). RESULTS: MCs were significantly elevated in CRSwNP patients as compared to CRSsNP patients and HCs. This elevation was not solely dependent on the presence of IgE-mediated hypersensitivity. Relative expression of prostaglandin D(2) synthase was also increased in CRSwNP patients along with an associated presence of a CRTH2(+) memory CD4(+) T cell population. CONCLUSION: Elevated percentages of MCs are found in the sinonasal mucosa of CRSwNP patients, regardless of atopic status. Secreted by MCs, elevated prostaglandin D(2) may play a role in the recruitment of CRTH2(+) cells to the inflamed mucosa of CRSwNP patients © 2012 ARS-AAOA, LLC.
Joanne L Shaw; Faramarz Ashoori; Samer Fakhri; Martin J Citardi; Amber Luong
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-16
Journal Detail:
Title:  International forum of allergy & rhinology     Volume:  -     ISSN:  2042-6984     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101550261     Medline TA:  Int Forum Allergy Rhinol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 American Rhinologic Society-American Academy of Otolaryngic Allergy, LLC.
Department of Otorhinolaryngology-Head & Neck Surgery and Texas Sinus Institute, University of Texas Medical School at Houston, Houston, TX; Department of Immunology and Center of Cancer Immunology Research, University of Texas MD Anderson Cancer Center, Houston, TX.
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