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Viral infected cell
- Molecular classification
- Other (descriptive/pathological state, not a molecule)
01
Overview
A *viral infected cell* is any host cell that has been invaded by a virus, resulting in the presence of viral genetic material and/or proteins within the cell. These cells act as factories for viral replication and assembly. Their identification and clearance are a central focus of the immune response to viral infection, and also a challenge for antiviral and immunotherapeutic drug development, as the destruction of infected cells may cause tissue damage. Unlike a defined protein, enzyme, or receptor, this is a pathological condition of a cell and not a discrete molecular target[1][3][4][6].
- Other names
- Virus-infected cellInfected cell (by virus)Virus harboring cell
02
Mechanism of action
Inhibition of viral replication inside the infected cell (via viral enzyme inhibition, genome disruption, etc.) Marking of infected cells for immune clearance (e.g., via recognition of viral peptides presented by MHC molecules) Induction of apoptosis in infected cells
03
Biological functions
Virus replication siteImmune response activation (as a signal for cytotoxic immune cells)Pathogenesis of infection
04
Disease associations
InfectionCancer (in cases of viral oncogenesis)Other (e.g., chronic inflammation, autoimmunity following infection)
05
Safety considerations
Off-target effects on uninfected cells if therapies are not specificImmune-mediated tissue damage (immunopathology from targeting infected cells)Emergence of viral escape mutants
06
Interacting drugs
Many antiviral drugs (e.g., nucleoside analogs, protease inhibitors) act on viral replication within infected cells but do not directly "target" the infected cell as a unique entity distinct from uninfected cells.
1 more in the full profile.
07
Biomarkers
Viral nucleic acids (e.g., viral RNA or DNA detected by PCR)Viral proteins expressed on the cell surface or within the cell (e.g., HIV p24 antigen, HBsAg for hepatitis B)Altered host cell markers (e.g., upregulation of immune activation markers)
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