BACKGROUND AND OBJECTIVE: Anomalies in the regulation of cyclooxygenase (COX)-1 and -2 have been described in nasal polyps of aspirin-induced asthma (AIA). Whether these anomalies are specific to nasal polyps or affect all the nasal mucosa (NM) of upper airways is still unclear. The objective of this study was to compare the COX pathway in NM of AIA patients with the NM of control subjects. METHODS: Fibroblasts were isolated from NM of five AIA patients (AIA-NM) and five control subjects (control-NM). Cells were treated with 10 ng/mL interleukin (IL)-1β for up to 72 h. Prostaglandin E2 (PGE2 ) production was measured by enzyme-linked immunosorbent assay (ELISA), expression of COX-1 protein by Western blot and COX-2 protein by ELISA, Western blot and immunofluorescence techniques. RESULTS: IL-1β increased PGE2 production and COX-1 protein expression in control-NM fibroblasts, but no changes were found in AIA-NM. IL-1β provoked a significant time-dependent increase in COX-2 protein expression in control-NM fibroblasts but had a very mild effect on COX-2 protein expression in AIA-NM. CONCLUSIONS: Our data suggest that abnormalities in the COX pathway are not a phenomenon exclusive to nasal-polyp mucosa as they are also present in all the NM of AIA patients. These anomalies may be involved in the pathogenesis of airway inflammation and non-steroidal anti-inflammatory drug intolerance in asthma patients with chronic rhinosinusitis and nasal polyposis.
BACKGROUND AND OBJECTIVE:Anomalies in the regulation of cyclooxygenase (COX)-1 and -2 have been described in nasal polyps of aspirin-induced asthma (AIA). Whether these anomalies are specific to nasal polyps or affect all the nasal mucosa (NM) of upper airways is still unclear. The objective of this study was to compare the COX pathway in NM of AIA patients with the NM of control subjects. METHODS: Fibroblasts were isolated from NM of five AIA patients (AIA-NM) and five control subjects (control-NM). Cells were treated with 10 ng/mL interleukin (IL)-1β for up to 72 h. Prostaglandin E2 (PGE2 ) production was measured by enzyme-linked immunosorbent assay (ELISA), expression of COX-1 protein by Western blot and COX-2 protein by ELISA, Western blot and immunofluorescence techniques. RESULTS: IL-1β increased PGE2 production and COX-1 protein expression in control-NM fibroblasts, but no changes were found in AIA-NM. IL-1β provoked a significant time-dependent increase in COX-2 protein expression in control-NM fibroblasts but had a very mild effect on COX-2 protein expression in AIA-NM. CONCLUSIONS: Our data suggest that abnormalities in the COX pathway are not a phenomenon exclusive to nasal-polyp mucosa as they are also present in all the NM of AIA patients. These anomalies may be involved in the pathogenesis of airway inflammation and non-steroidal anti-inflammatory drug intolerance in asthmapatients with chronic rhinosinusitis and nasal polyposis.
Authors: Judith Plaza; Rosa Torres; Adrián Urbano; César Picado; Fernando de Mora Journal: Allergy Asthma Immunol Res Date: 2020-07 Impact factor: 5.764
Authors: Rosa Muñoz-Cano; Clara San Bartolome; Rocío Casas-Saucedo; Giovanna Araujo; Sonia Gelis; Maria Ruano-Zaragoza; Jordi Roca-Ferrer; Francis Palomares; Margarita Martin; Joan Bartra; Mariona Pascal Journal: Front Immunol Date: 2021-02-17 Impact factor: 7.561
Authors: Cemal Cingi; Nuray Bayar Muluk; Dimitrios I Mitsias; Nikolaos G Papadopoulos; Ludger Klimek; Anu Laulajainen-Hongisto; Maija Hytönen; Sanna Katriina Toppila-Salmi; Glenis Kathleen Scadding Journal: Front Allergy Date: 2021-02-22