Proinflammatory cytokines and eosinophil cationic protein on glandular secretion from human nasal mucosa: regulation by corticosteroids
Summary
This summary is machine-generated.Proinflammatory cytokines and eosinophil products stimulate lactoferrin secretion in nasal mucosa, contributing to airway hypersecretion. Corticosteroids can reduce this effect, offering a potential treatment for inflamed nasal conditions.
Area Of Science
- Immunology
- Rhinology
- Molecular Biology
Background
- Airway hypersecretion is common in rhinitis and asthma.
- Proinflammatory cytokines are upregulated in these conditions.
- The impact of inflammation on glandular secretion is not fully understood.
Purpose Of The Study
- To investigate the effect of proinflammatory cytokines and eosinophil products on human nasal lactoferrin secretion in vitro.
- To determine the role of corticosteroids and IL-10 in modulating this secretion.
Main Methods
- Human nasal explants were incubated with various cytokines (IL-1beta, IL-4, IL-5, IL-8, eotaxin, GM-CSF, TNF-alpha), eosinophil cationic protein (ECP), IL-10, and budesonide.
- Incubation occurred under controlled atmospheric conditions (37°C).
- Lactoferrin concentrations in culture supernatants were measured using ELISA in a time- and dose-dependent manner.
Main Results
- Eosinophil cationic protein (ECP) and tumor necrosis factor-alpha (TNF-alpha) dose-dependently stimulated lactoferrin secretion.
- Interleukin-1beta (IL-1beta) and granulocyte-macrophage colony-stimulating factor (GM-CSF) also stimulated secretion at 24 hours.
- Budesonide inhibited IL-1beta- and TNF-alpha-induced lactoferrin secretion, while IL-10 had no effect.
Conclusions
- ECP and certain proinflammatory cytokines (IL-1beta, TNF-alpha, GM-CSF) contribute to glandular hypersecretion in inflamed nasal passages.
- Corticosteroids may mitigate nasal hypersecretion by inhibiting the direct effects of these cytokines on glandular output.
View abstract on PubMed