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Target intelligence / Profile preview
Influenza Virus Antigens (N/A)
- Target
- N/A
- Molecular classification
- Glycoprotein, Viral Protein, Surface Antigen
01
Overview
Influenza virus antigens are molecular structures on the surface or within influenza viruses that are recognized by the host immune system. The most significant antigens for immune recognition and vaccine development are hemagglutinin (HA) and neuraminidase (NA), both of which are glycoproteins embedded in the viral envelope. These antigens play critical roles in viral infectivity, host specificity, and immune evasion. Antigenic drift and shift lead to the emergence of new strains, necessitating regular updates to vaccines. Other antigens include matrix protein 2 (M2) and nucleoprotein (NP).
- Other names
- Influenza Virus Surface AntigensInfluenza Virus ProteinsHemagglutinin (HA)Neuraminidase (NA)M2 proteinNucleoprotein (NP)
02
Mechanism of action
Neuraminidase inhibitors block virion release. M2 inhibitors (adamantanes) inhibit ion channel function (although resistance is widespread). Baloxavir inhibits cap-dependent endonuclease.
03
Biological functions
Host cell bindingMembrane fusionVirion releaseImmune recognitionViral entry
04
Disease associations
InfectionInfluenzaPandemicEpidemic
05
Safety considerations
Antigenic driftAntigenic shiftVaccine efficacyDrug resistanceImmune evasion
06
Interacting drugs
Oseltamivir
4 more in the full profile.
07
Biomarkers
Antibody titers against HAAntibody titers against NAViral loadAntigenic match to vaccine strains
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