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Resident memory B cells are enriched in chronic rhinosinusitis with nasal polyps
Yohei Sato1,2, Natsuki Inoue3,4, Erika Osada2
1Laboratory of Immune Cell Therapy, Project Research Unit, Jikei University School of Medicine, Tokyo, Japan.
The Journal of Allergy and Clinical Immunology. Global
|November 25, 2024
Summary
Resident memory B (BRM) cells are present in normal nasal tissue but significantly increase in chronic rhinosinusitis with nasal polyps (CRSwNP). This finding highlights BRM cells as potential targets for CRSwNP therapies.
Area of Science:
- Immunology
- Otorhinolaryngology
- Cell Biology
Background:
- Chronic rhinosinusitis with nasal polyps (CRSwNP) is a chronic inflammatory sinonasal disease.
- Resident memory B (BRM) cells, previously identified in lungs, were not yet characterized in the sinonasal mucosa.
- Understanding B-cell roles in CRSwNP is crucial for developing targeted therapies.
Purpose of the Study:
- To characterize memory B-cell phenotypes in patients with CRSwNP.
- To identify and quantify resident memory B (BRM) cells in normal and CRSwNP sinonasal mucosa.
- To explore the potential of BRM cells as therapeutic targets in CRSwNP.
Main Methods:
- Isolation of CD19+ B cells from CRSwNP patients.
- Analysis using flow cytometry.
- Immunohistochemical analysis of sinonasal tissue sections.
Main Results:
- BRM cells were detected in normal sinonasal mucosa, but in limited numbers.
- BRM cells were significantly enriched in nasal polyps from CRSwNP patients.
- Upregulation of CD69/CD45RB markers confirmed BRM cell presence in CRSwNP tissues.
Conclusions:
- BRM cells are present in normal sinonasal mucosa and significantly enriched in CRSwNP nasal polyps.
- These findings enhance understanding of CRSwNP immunopathology.
- BRM cells represent a potential therapeutic target for CRSwNP, including anti-B-cell strategies.
Keywords:
CRSwNPChronic rhinosinusitis with nasal polypsmemory B cellsnasal polypsresident memory B cellsMore Related Videos
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