B-cell receptor specific for Neisseria meningitidis serogroup Y capsular polysaccharide (BCR-MenY-CPS)

B-cell receptors (BCRs) specific for Neisseria meningitidis serogroup Y capsular polysaccharide epitopes are specialized surface immunoglobulins that recognize the unique carbohydrate structure of the serogroup Y capsule, which consists of alternating units of glucose and N-acetylneuraminic acid (CDC, 2022). These receptors are composed of a membrane-bound immunoglobulin molecule associated with signaling subunits, and they are found on a specific subset of B lymphocytes (Pollard et al., 2009). The primary biological function of these BCRs is to bind the serogroup Y polysaccharide, thereby initiating the adaptive immune response (WHO, 2023). Upon antigen binding, the BCR triggers intracellular signaling that leads to B-cell activation, clonal expansion, and differentiation into antibody-secreting plasma cells and memory B cells (Pollard et al., 2009). In the context of preventive medicine, these receptors are the molecular targets for meningococcal conjugate vaccines, such as MenACWY, which aim to induce long-term protective immunity (FDA, 2020). The antibodies produced following BCR stimulation provide protection by facilitating complement-mediated lysis and opsonophagocytosis of the bacteria (Borrow et al., 2005). Failure of these receptors to recognize the pathogen or a lack of corresponding B-cell clones can lead to invasive meningococcal disease, characterized by rapid-onset meningitis or life-threatening sepsis (CDC, 2022). Monitoring the efficacy of drugs targeting these receptors is typically performed using the serum bactericidal assay (SBA), which measures the functional activity of the resulting antibodies (Borrow et al., 2005).

Other names

Neisseria meningitidis serogroup Y polysaccharide-specific B-cell receptorMenY-specific BCRAnti-MenY B-cell receptorB-cell receptors specific for Neisseria meningitidis serogroup Y capsular polysaccharide epitopes

The vaccine antigen binds specifically to the B-cell receptor on the surface of naive or memory B cells, triggering an intracellular signaling cascade that leads to B-cell activation, proliferation, and differentiation into antibody-secreting plasma cells (Pollard et al., 2009).