Viral interference with innate immunity by preventing NF-κB activity

Area of Science:

• Immunology
• Virology
• Molecular Biology

Background:

• Viruses are major human pathogens that employ diverse strategies to evade host immunity.
• Host immune responses are initiated by pattern recognition receptors (PRRs) sensing pathogen-associated molecular patterns (PAMPs).
• Activation of the nuclear factor-kappa B (NF-κB) pathway is critical for early immune responses against pathogens.

Purpose of the Study:

• To review viral mechanisms for subverting host immunity.
• To discuss viral effectors that inhibit NF-κB signaling.
• To categorize viral inhibition strategies within the NF-κB pathway.

Main Methods:

• Literature review of recent evidence on viral immune evasion.
• Analysis of viral effector functions targeting NF-κB signaling.
• Classification of viral inhibition mechanisms based on their site of action.

Main Results:

• Viruses utilize numerous effectors to counteract host immune sensing via PRRs like TLRs, RLRs, NLRs, and DNA receptors.
• Viral effectors actively inhibit NF-κB pathway activation, a key step in immune response.
• Viral inhibition of NF-κB occurs at three main levels: Toll-like receptors (TLRs), the IKK complex, or the transcriptional level.

Conclusions:

• Understanding viral inhibition of NF-κB is crucial for developing antiviral strategies.
• Viral evasion tactics highlight the complex interplay between host defense and pathogen survival.
• Targeting viral interference with NF-κB signaling offers potential therapeutic avenues.