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Poliovirus Type 1, 2, and 3 Antigens
- Molecular classification
- Viral structural protein, Antigen
01
Overview
Poliovirus type 1, 2, and 3 antigens encompass the structural proteins (VP1, VP2, VP3, VP4) that form the capsid of the three poliovirus serotypes. These antigens, particularly the conformational 'D' epitopes on VP1-VP3, are critical for inducing neutralizing antibodies and providing protective immunity following natural infection or vaccination. The three serotypes exhibit distinct antigenic properties, necessitating serotype-specific immunity. Poliovirus antigens are targets for vaccine development (OPV and IPV) and laboratory diagnostics.
- Other names
- Poliovirus Type 1 AntigenPoliovirus Type 2 AntigenPoliovirus Type 3 AntigenPV1 AntigensPV2 AntigensPV3 AntigensPoliovirus capsid proteinsVP1VP2VP3D-antigen (Poliovirus)C-antigen (Poliovirus)
02
Mechanism of action
Vaccines stimulate the production of neutralizing antibodies against the D-antigen epitopes, preventing viral attachment and entry into host cells.
03
Biological functions
Viral entryImmune recognitionAntibody neutralizationVaccine-induced immunity
04
Disease associations
Poliomyelitis
05
Safety considerations
OPV: Vaccine-derived poliovirus (VDPV) emergenceIPV: Limited mucosal immunity compared to OPVPotential for antigenic drift affecting vaccine efficacy
06
Interacting drugs
Oral Polio Vaccine (OPV)
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