Polyclonal B-cell receptors recognizing Neisseria meningitidis serogroup A and C capsular polysaccharide epitopes (BCR)

Polyclonal B-cell receptors (BCRs) recognizing Neisseria meningitidis serogroup A and C capsular polysaccharide epitopes are the primary immunological targets for meningococcal vaccines (CDC, 2023). These receptors are membrane-bound immunoglobulins expressed on the surface of B lymphocytes, where they function to detect specific bacterial antigens (UniProt, 2024). Serogroup A polysaccharides consist of (alpha 1 to 6)-linked N-acetylmannosamine-1-phosphate, while serogroup C consists of (alpha 2 to 9)-linked N-acetylneuraminic acid (PubMed, PMID: 25635351). Upon binding these specific epitopes, the BCRs trigger intracellular signaling pathways that lead to B-cell activation, clonal expansion, and differentiation into plasma cells that secrete high-affinity protective antibodies (StatPearls, 2023). In the context of vaccination, conjugate vaccines are designed to enhance this process by recruiting T-cell help, leading to long-term immunological memory (WHO, 2023). These receptors are critical for preventing invasive meningococcal disease, including meningitis and sepsis, by ensuring a rapid and robust immune response upon exposure to the pathogen.

Other names

B-cell receptorsSurface immunoglobulinsMeningococcal-specific B-cell receptorsAntigen-specific B-cell receptors

Vaccine-derived polysaccharide antigens bind to specific B-cell receptors (BCRs), inducing receptor clustering and activating intracellular signaling cascades (e.g., Src family kinases). This process triggers B-cell proliferation, affinity maturation, and differentiation into memory B cells and plasma cells that secrete protective IgG and IgM antibodies (PubMed, PMID: 11282392; StatPearls, 2023).