Unlike their B cell precursors, which express antibody receptors on their surface, plasma cells act as factories, pumping out thousands of identical antibody molecules per second. Upon encountering their specific antigen and receiving necessary co-stimulatory signals from helper T cells, activated B cells undergo clonal expansion within secondary lymphoid organs.
Key Functions of Plasma Cells in Immunity and Antibody Production
Origin and Differentiation The lifecycle of a plasma cell begins in the bone marrow, where hematopoietic stem cells give rise to B cell precursors. Clinical Significance and Dysregulation The critical balance of plasma cell function is evident in various pathological conditions.
Long-Term Protection and Memory While many plasma cells are short-lived responders that appear during an acute infection, a portion of these cells migrate to survival niches in the bone marrow, where they can persist for decades. Understanding what are the functions of plasma cells requires examining their origin, their specialized machinery for antibody synthesis, and their impact on both immediate defense and long-term immunological memory.
Key Functions of Plasma Cells in Immunity and Antibody Production
They can directly neutralize pathogens by coating their surface, thereby blocking the microbe’s ability to enter and infect host cells. These long-lived plasma cells provide a state of humoral immunity, ensuring that the body retains a ready supply of antibodies against previously encountered threats.
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