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Immunomodulation as a Protective Strategy in Chronic Otitis Media
Anke Leichtle1, Arwa Kurabi2, David Leffers1
1Department of Otorhinolaryngology, Head and Neck Surgery, University of Lübeck, Lübeck, Germany.
Frontiers in Cellular and Infection Microbiology
|April 18, 2022
Summary
Middle ear mucosal hyperplasia in otitis media stems from inflammatory and apoptotic gene expression. Targeting these molecules via TLRs/NLRs offers potential therapeutic strategies for chronic ear infections.
Area of Science:
- Immunology
- Otolaryngology
- Molecular Biology
Background:
- Otitis media, a common childhood illness, involves middle ear mucosal hyperplasia and leukocyte infiltration.
- Innate immune receptor activation triggers transcription factors regulating inflammation and tissue growth.
Purpose of the Study:
- Investigate signaling pathways in otitis media pathogenesis.
- Evaluate therapeutic immunomodulation strategies using mouse models and human samples.
Main Methods:
- Utilized mouse models and human chronic otitis media samples.
- Assessed gene and protein expression of innate immune molecules (e.g., NODs, TNFα, Casp3).
- Evaluated immunomodulating molecule influence on human middle ear epithelial cells (HMEECs) in vitro.
Main Results:
- Persistent mucosal hyperplasia correlated with inflammatory and apoptotic gene expression.
- Specific molecules modulated in clinical samples after stimulation.
- HMEECs showed hyposensitive responses after dual bacterial/NOD-/TLR-pathway stimulation.
Conclusions:
- Middle ear mucosal hyperplasia is driven by TLRs/NLRs activation of inflammatory and apoptotic pathways.
- Identified molecules are potential targets for immunologic therapies in otitis media.
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