Naïve B-cell receptor specific for meningococcal capsular polysaccharide epitopes (BCR)

The B-cell receptor (BCR) specific for Neisseria meningitidis capsular polysaccharide is a membrane-bound immunoglobulin complex located on the surface of naïve B cells. Its primary biological function is the recognition of specific carbohydrate epitopes found on the bacterial capsule, which is a critical step in initiating the humoral immune response against meningococcal infection (Pollard et al., 2009, Nature Reviews Immunology). Upon binding to these epitopes, the BCR undergoes cross-linking, triggering downstream signaling pathways such as the MAPK and PI3K pathways that lead to B-cell activation and differentiation (Janeway et al., 2001, Immunobiology). In the context of disease, Neisseria meningitidis is a leading cause of bacterial meningitis and septicemia, utilizing its polysaccharide capsule to evade host phagocytosis (Stephens et al., 2007, The Lancet). Therapeutic intervention primarily involves vaccines, including pure polysaccharide vaccines and protein-polysaccharide conjugate vaccines, which target these BCRs to induce protective immunity (Snape & Pollard, 2005, Drugs). Conjugate vaccines are particularly effective as they facilitate T-cell-dependent responses, overcoming the limitations of T-independent signaling associated with pure polysaccharides in young children (Borrow et al., 2013, Vaccine). This interaction ultimately results in the production of high-affinity antibodies and the establishment of immunological memory, providing long-term protection against invasive meningococcal disease.

Other names

Meningococcal polysaccharide-specific B-cell receptorNeisseria meningitidis capsular polysaccharide-specific BCRSurface immunoglobulin M specific for meningococcal CPSAnti-meningococcal CPS B-cell receptor

Antigen-mediated cross-linking of the B-cell receptor complex on naïve B cells initiates intracellular signaling cascades, leading to B-cell proliferation, clonal expansion, and differentiation into antibody-secreting plasma cells and memory B cells.