Cytokine regulation of mucin secretion in a human middle ear epithelial model. Cytokine 2008 Jan;41(1):38-43
Date
12/08/2007Pubmed ID
18063379Pubmed Central ID
PMC2255598DOI
10.1016/j.cyto.2007.10.009Scopus ID
2-s2.0-37449011787 (requires institutional sign-in at Scopus site) 23 CitationsAbstract
OBJECTIVES: Middle ear mucins are associated with otitis media (OM), contribute to hearing loss and are regulated by cytokines. This work investigates the regulation of mucin secretion from human middle ear epithelial cells (HMEEC) by inflammatory cytokines interleukin-1beta (IL-1beta), tumor necrosis factor-alpha (TNF-alpha) and cytokine inhibitors interleukin-1 receptor antagonist (IL-1ra) and anti-tumor necrosis factor-alpha antibody (TNFab).
METHODS: HMEEC were exposed to IL-1beta and TNF-alpha in a dose- and time-dependent manner. Cytokine stimulated HMEEC were also exposed to IL-1ra and TNFab in a dose-dependent manner. Mucin secretion was characterized by exclusion chromatography and liquid scintillation.
RESULTS: HMEEC exposed to IL-1beta and TNF-alpha demonstrated significant upregulation of mucin secretion in a dose-dependent fashion. Cultures exposed to IL-1beta at 100ng/ml and TNF-alpha at 200ng/ml showed increased mucin secretion in time-dependent experiments at 16h (P=0.00008) for TNF-alpha and 8 (P=0.028) and 16h (P=0.00001) for IL-1beta. IL-1ra and TNFab inhibited the effects of increased mucin secretion by IL-1beta and TNF-alpha.
CONCLUSIONS: IL-1beta and TNF-alpha upregulate mucin secretion from HMEEC in a dose- and time-dependant manner and these effects can be inhibited by cytokine blockade. Improved understanding of these mechanisms has the potential to alter the approach and management of OM and lead to novel therapeutic interventions.
Author List
Samuel EA, Burrows A, Kerschner JEAuthor
Joseph E. Kerschner MD Provost, Executive Vice President, Dean, Professor in the School of Medicine Administration department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AntibodiesCell Line, Transformed
Dose-Response Relationship, Drug
Ear, Middle
Epithelial Cells
Hearing Loss
Humans
Inflammation
Interleukin 1 Receptor Antagonist Protein
Interleukin-1beta
Mucins
Time Factors
Tumor Necrosis Factor-alpha
Up-Regulation