cell
Memory B Cell
Long-lived recall cell preserving antigen experience and enabling rapid secondary antibody responses
Review layer
Last reviewed 2026-05-17
Systems teaching draft. Content is structured for education and graph expansion, with formal source tagging ready for the next review pass.
State signature
Systems profile
Graph neighborhood
Direct relationships
Selected germinal-center cells become memory B cells
Network behavior
Systems Overview
Memory B cells retain antigen experience and can rapidly reactivate into germinal-center or plasma-cell programs after re-exposure.
Lineage
Origin
Germinal-center or extrafollicular response -> memory B-cell pool -> recall plasmablast or renewed germinal-center entry
Transcription factors: PAX5, BACH2, BCL2, TCF1-like memory programs
Lifecycle Visualizer
weeks
Selection
Survives germinal-center output
months-years
Quiescence
Long-lived recall pool
hours-days
Recall activation
Rapid antigen response
days-weeks
Secondary fate
Plasmablast or germinal center
Activation and Suppression
Activators
Suppressors
Surface and Secreted Signals
Surface markers
Secretions
Metabolic State
Programs
Acute: Recall activation quickly generates plasmablasts and higher-affinity antibody.
Chronic: Repeated stimulation can skew memory pools, support autoimmunity, or exhaust useful diversity.
Tissue Roles
lymphoid: Recall response coordination and secondary germinal-center entry.
gut: Mucosal memory and IgA recall.
lung: Respiratory pathogen and vaccine recall.
skin: Can support recall antibody responses after barrier antigen exposure.
Disease Associations
Clinical Pearls
- Switched memory B cells are often central in CVID phenotyping.
- Memory quality explains why prior exposure does or does not protect.
- Recall is faster because the system has already paid the selection cost.