Viruses, endoplasmic reticulum stress, and interferon responses

Area of Science:

• Virology
• Immunology
• Cellular Biology

Background:

• Viral infections induce both interferon responses and endoplasmic reticulum (ER) stress.
• Interferon responses are triggered by viral double-stranded RNA, while ER stress is induced by viral proteins.
• The double-stranded RNA-dependent protein kinase (PKR) is a key interferon-regulated protein that limits viral replication.

Purpose of the Study:

• To review recent advances in understanding how viruses interact with ER stress and interferon responses.
• To explore viral strategies for overcoming cellular defense mechanisms.
• To highlight the complex interplay between viral replication and host cell stress pathways.

Main Methods:

• This review synthesizes findings from recent scientific literature.
• It focuses on the molecular mechanisms by which viruses manipulate host cell responses.
• Key areas examined include PKR function and ER stress-induced pathways.

Main Results:

• Viruses have evolved mechanisms to counteract the antiviral effects of PKR.
• ER stress, while potentially leading to apoptosis, is also manipulated by viruses.
• Viruses interfere with interferon signaling and exploit ER stress pathways to facilitate replication and pathogenesis.

Conclusions:

• Viruses actively manipulate both interferon responses and ER stress pathways.
• Understanding these viral strategies is crucial for developing antiviral therapies.
• The complex interplay between viruses and host cell stress offers insights into viral pathogenesis.