Target intelligence / Profile preview

Haemophilus influenzae type b polyribosyl-ribitol-phosphate polysaccharide (PRP)

Target: PRP
Molecular classification: Polysaccharide, Capsular Polysaccharide

Overview

Haemophilus influenzae type b polyribosyl-ribitol-phosphate is an essential surface-exposed capsular polysaccharide critical for bacterial survival within hosts due to its antiphagocytic properties. Its structure—a linear chain built from alternating ribose/ribitol phosphate—forms highly specific epitopes targeted by protective antibodies induced through vaccination with protein-conjugated forms of this molecule.

Other names: Hib PRPPolyribosyl-ribitol-phosphate

Mechanism of action

Conjugate vaccines induce T-cell dependent antibody production against PRP, leading to opsonization and complement-mediated killing of Hib.

Biological functions

Virulence factorImmune evasionAntiphagocytosis

Disease associations

InfectionMeningitisSepticemiaPneumonia

Safety considerations

Vaccines do not protect against non-type-b or nontypeable H. influenzae strains.

Interacting drugs

Hib conjugate vaccines

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