AI Article Synopsis
- Prostaglandin D2 (PGD2) is released from mast cells during allergic reactions and is linked to nasal congestion.
- Researchers examined the distribution of hematopoietic prostaglandin D synthase (PGDS) and the PGD2 receptors (DP and CRTH2) in nasal mucosa from healthy individuals and those with chronic rhinosinusitis polyposis.
- The findings showed that in healthy mucosa, PGDS was limited to a few mast cells, while in polyposis, PGDS was found in various inflammatory cells, and both PGD2 receptors were present in eosinophils and some T cells, suggesting their involvement in upper airway inflammation.
Article Abstract
Background: Prostaglandin D2 (PGD2) is released from mast cells during the allergic response.
Objective: Since PGD2 has been shown to induce nasal congestion in humans, we investigated the distribution of hematopoietic prostaglandin D synthase (PGDS) and the two PGD2 receptors, DP and CRTH2 in human nasal mucosa from healthy subjects and subjects suffering from polyposis, a severe form of chronic rhinosinusitis.
Methods: DP mRNA expression was detected by in situ hybridization while PGDS, CRTH2 and various leukocyte markers expression were revealed by immunohistochemistry.
Results: In the normal mucosa, PGDS was only detected in few resident mast cells while CRTH2 was undetectable. In contrast, DP receptor mRNA was detected in epithelial goblet cells, serous glands and in the vasculature. In the nasal mucosa of subjects suffering from polyposis: (1) PGDS was detected in mast cells and other large infiltrating inflammatory cells, (2) both DP mRNA and CRTH2 were detected in eosinophils and (3) CRTH2 was detected on a subset of infiltrating T cells. Although DP mRNA could not be detected in the T cells invading the nasal mucosa, it was found to be expressed in the T cells present in the lymph node and the thymus from normal individuals.
Conclusion: This study indicates that cells capable of producing PGD2 are present in the nasal mucosa and that both PGD2 receptors, DP and CRTH2, might play a role in inflammatory disease of the upper airways.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.prostaglandins.2003.12.002 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Tissue Eosinophils Threshold and its Association with Adult-Onset Asthma in Chronic Rhinosinusitis.
Int Forum Allergy Rhinol
January 2025
Center of Excellence in Otolaryngology-Head & Neck Surgery, Rajavithi Hospital, Bangkok, Thailand.
Introduction: Tissue eosinophil counts (TEC) might serve as a biomarker linking chronic rhinosinusitis (CRS) and the presence of adult-onset asthma. This study aimed to determine if TEC in sinus mucosa/polyps in CRS patients is an independent indicator of asthma and to identify its optimal cut-off point.
Methods: This cross-sectional study was conducted on primary CRS patients scheduled for surgery.
Disseminated Extranodal Natural Killer/T-Cell Lymphoma Mimicking a Paraneoplastic Polymyositis.
Clin Nucl Med
November 2024
From the Department of Diagnostic, Molecular, and Interventional Radiology, Icahn School of Medicine at Mount Sinai West, New York, NY.
Extranodal natural killer/T-cell lymphoma (ENKTCL) is an aggressive EBV-associated non-Hodgkin lymphoma, most commonly arising from within the mucosa of the upper aerodigestive tract, typically with nasal presentation. Here, we present an interesting case of a 36-year-old man with ENKTCL with an atypical pattern of disease progression despite 3 cycles of SMILE chemotherapy. Restaging 18F-FDG PET/CT demonstrated widespread uptake within the skeletal musculature in a distribution concerning for a paraneoplastic polymyositis.
View Article and Find Full Text PDFDisseminated Extranodal Natural Killer/T-Cell Lymphoma Mimicking a Paraneoplastic Polymyositis.
Clin Nucl Med
February 2025
From the Department of Diagnostic, Molecular, and Interventional Radiology, Icahn School of Medicine at Mount Sinai West, New York, NY.
Extranodal natural killer/T-cell lymphoma (ENKTCL) is an aggressive EBV-associated non-Hodgkin lymphoma, most commonly arising from within the mucosa of the upper aerodigestive tract, typically with nasal presentation. Here, we present an interesting case of a 36-year-old man with ENKTCL with an atypical pattern of disease progression despite 3 cycles of SMILE chemotherapy. Restaging 18F-FDG PET/CT demonstrated widespread uptake within the skeletal musculature in a distribution concerning for a paraneoplastic polymyositis.
View Article and Find Full Text PDFProtective Effect of Platycodin D on Allergic Rhinitis in Mice through DPP4/JAK2/STAT3 Pathway Inhibition.
Curr Mol Pharmacol
January 2025
Otolaryngology Department, the Second Hospital of Hebei Medical University, Shijiazhuang, PRChina 050000.
Background: Allergic Rhinitis (AR) is an inflammatory condition characterized by nasal mucosa remodeling, driven by Immunoglobulin E (IgE). Platycodin D (PLD) exhibits a wide range of bioactive properties.
Aim: The aim of this work was to investigate the potential protective effects of PLD on AR, as well as the underlying mechanisms.
Expression Levels of MUC5AC and MUC5B in Airway Goblet Cells Are Associated with Traits of COPD and Progression of Chronic Airflow Limitation.
Int J Mol Sci
December 2024
Research Unit of Biomedicine and Internal Medicine, University of Oulu, 902 20 Oulu, Finland.
Mucins 5AC (MUC5AC) and 5B (MUC5B) are the major mucins providing the organizing framework for the airway's mucus gel. We retrieved bronchial mucosal biopsies and bronchial wash (BW) samples through bronchoscopy from patients with chronic obstructive pulmonary disease ( = 38), healthy never-smokers ( = 40), and smokers with normal lung function ( = 40). The expression of MUC5AC and MUC5B was assessed immunohistochemically.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!