B-cell antigen receptor specific for Neisseria meningitidis serogroup A and C capsular polysaccharides

B-cell antigen receptors (BCRs) specific for Neisseria meningitidis serogroup A (NmA) and C (NmC) capsular polysaccharides are specialized membrane-bound immunoglobulins that recognize specific carbohydrate epitopes on the bacterial surface. These receptors play a pivotal role in the adaptive immune system by identifying the meningococcal capsule, which is a primary virulence factor used by the bacteria to evade host defenses (Pollard et al., 2009). Binding of the NmA or NmC polysaccharide to its specific BCR triggers a signal transduction cascade that leads to the activation, clonal expansion, and differentiation of B cells into antibody-secreting plasma cells and memory B cells (Frasch et al., 2005). This process is the fundamental mechanism by which meningococcal vaccines, such as Menactra or Nimenrix, confer immunity to individuals (Harrison et al., 2013). Because these polysaccharides are T-cell independent antigens, they often require conjugation to a carrier protein to effectively stimulate these BCRs in infants and young children, ensuring a robust and lasting immune response (Goldschneider et al., 1969). Monitoring the success of such therapies involves assessing the functional capacity of the antibodies produced, typically through serum bactericidal assays.

Other names

Anti-NmA/NmC B-cell receptorMeningococcal serogroup A and C specific B-cell receptorNmA/NmC-specific surface immunoglobulinAnti-meningococcal polysaccharide BCR

Vaccine-induced activation of specific B-cell antigen receptors through epitope binding, leading to receptor clustering, intracellular signaling, clonal expansion, and the production of protective IgG and IgM antibodies.