Related Experiment Video
Updated: May 16, 2025
07:07
Evaluation of T Follicular Helper Cells and Germinal Center Response During Influenza A Virus Infection in Mice
Published on: June 27, 2020
5.2K
Lung B cells in ectopic germinal centers undergo affinity maturation
Stephane M Guillaume1, William S Foster1, Isabel San Martín Molina1,2
1Immunology Program, Babraham Institute, Cambridge CB22 3AT, United Kingdom.
Summary
The lungs can form small germinal centers (GCs) that mature B cells and generate memory B cells (MBCs) directly within lung tissue, even after chronic allergen exposure.
Area of Science:
- Immunology
- Pulmonology
- Cell Biology
Background:
- The lungs face constant exposure to airborne antigens, leading to immune responses.
- Chronic allergen exposure can induce ectopic germinal centers (GCs) in lung tissue.
Purpose of the Study:
- To investigate the function and characteristics of ectopic GCs in the lung.
- To determine if lung GCs support B cell diversification and memory B cell generation.
Main Methods:
- Analysis of lung tissue following allergen exposure.
- Characterization of B cell populations and germinal center structures within the lung.
Main Results:
- Ectopic lung GCs are smaller and less B cell-dense than lymph node GCs.
- Lung GCs support somatic hypermutation and affinity maturation.
- Memory B cells (MBCs) are exported directly into lung tissue from these GCs.
Conclusions:
- The lung possesses the capacity for local B cell response diversification.
- Ectopic GCs in the lung facilitate the in situ generation of tissue-resident memory B cell populations.
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