cell
Plasma Cell
Antibody-secreting terminal B-cell state with unfolded-protein and survival-niche demands
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
Germinal-center output can become long-lived plasma cells
Bone marrow survival niches maintain long-lived plasma cells and durable antibody output
Network behavior
Systems Overview
Plasma cells specialize in sustained antibody secretion and depend on survival niches, protein-folding capacity, and class-switch history.
Lineage
Origin
Activated B cell or germinal-center B cell -> plasmablast -> short-lived or long-lived plasma cell
Transcription factors: BLIMP1, XBP1, IRF4, PRDM1
Lifecycle Visualizer
days
Plasmablast
Migratory high-output antibody cell
days-weeks
Niche homing
Survival-site entry
months-years
Long-lived secretion
Sustained antibody output
months-years
Attrition or persistence
Niche competition and survival
Activation and Suppression
Activators
Suppressors
Surface and Secreted Signals
Metabolic State
Programs
Acute: Plasmablasts rapidly secrete antibody after activation.
Chronic: Long-lived plasma cells can maintain protective antibody or pathogenic autoantibody for years.
Tissue Roles
boneMarrow: Long-lived plasma-cell survival niches maintain systemic antibodies.
gut: IgA plasma cells dominate mucosal antibody production.
lung: Local plasma cells can support respiratory protection or chronic inflammation.
lymphoid: Short-lived plasmablasts emerge after activation.
Disease Associations
Clinical Pearls
- Plasma cells explain antibody persistence after antigen has disappeared.
- Protective antibody and pathogenic autoantibody can use the same survival logic.
- Immunoglobulin class and glycan state reflect upstream B-cell and helper-cell context.