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Neisseria meningitidis Serogroup W Capsular Polysaccharide (Serogroup W CPS)

Target: Serogroup W CPS
Molecular classification: Polysaccharide, Capsular Polysaccharide, Bacterial Antigen

Overview

The Neisseria meningitidis serogroup W capsular polysaccharide is a complex carbohydrate polymer that forms the outer capsule of the bacterium. It is a major virulence factor, protecting the bacteria from phagocytosis and complement-mediated killing. The polysaccharide consists of repeating units containing sialic acid linked to galactose. It is the target of quadrivalent and conjugate vaccines, which induce immunity against multiple strains of N. meningitidis, including serogroup W. Vaccination against this polysaccharide significantly reduces the incidence of invasive meningococcal disease.

Other names: N. meningitidis serogroup W polysaccharideGroup W capsular polysaccharideSerogroup W (W-135) capsular polysaccharide

Mechanism of action

Antibody-mediated neutralization and opsonization following vaccination, leading to complement-mediated killing and phagocytosis.

Biological functions

Immune evasionVirulence factorSerogroup determinationCapsule biogenesis

Disease associations

InfectionMeningitisSepsis

Safety considerations

Vaccine-related adverse events (e.g., injection site reactions)Potential for serogroup replacement after widespread vaccination

Interacting drugs

Quadrivalent Meningococcal Vaccines (A, C, Y, W)

1 more in the full profile.

Biomarkers

Antibody titers against serogroup W capsular polysaccharidePresence of serogroup W N. meningitidis in clinical samples

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