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Inhibition of type I interferon induction and signalling by mosquito-borne flaviviruses
Stephanie L Cumberworth1, Jordan J Clark1, Alain Kohl1
1MRC-University of Glasgow Centre for Virus Research, Glasgow, Scotland, UK.
Abstract:
The Flavivirus genus (Flaviviridae family) contains a number of important human pathogens, including dengue and Zika viruses, which have the potential to cause severe disease. In order to efficiently establish a productive infection in mammalian cells, flaviviruses have developed key strategies to counteract host immune defences, including the type I interferon response. They employ different mechanisms to control interferon signal transduction and effector pathways, and key research generated over the past couple of decades has uncovered new insights into their abilities to actively decrease interferon antiviral activity. Given the lack of antivirals or prophylactic treatments for many flaviviral infections, it is important to fully understand how these viruses affect cellular processes to influence pathogenesis and disease outcome. This review will discuss the strategies mosquito-borne flaviviruses have evolved to antagonise type I interferon mediated immune responses.
Insights
Flaviviruses like dengue and Zika viruses evade immune responses by suppressing the type I interferon antiviral activity. Understanding these evasion strategies is crucial for developing treatments against flaviviral infections.
Area of Science:
- Virology
- Immunology
- Molecular Biology
Background:
- Flaviviruses, including dengue and Zika viruses, are significant human pathogens.
- These viruses belong to the Flaviviridae family and can cause severe diseases.
- Flaviviruses must overcome host immune defenses, particularly the type I interferon response, to establish infection.
Purpose of the Study:
- To review the strategies employed by mosquito-borne flaviviruses to antagonize type I interferon-mediated immune responses.
- To highlight the importance of understanding viral mechanisms for pathogenesis and disease outcome.
- To discuss the implications for the development of antivirals and prophylactic treatments.
Main Methods:
- This review synthesizes existing research on flavivirus immune evasion mechanisms.
- It focuses on strategies targeting the type I interferon signaling and effector pathways.
- The review analyzes how flaviviruses actively reduce interferon antiviral activity.
Main Results:
- Flaviviruses utilize diverse mechanisms to interfere with host antiviral defenses.
- Key research over the past decades has revealed sophisticated viral strategies to counteract interferon.
- These viral tactics are essential for productive infection in mammalian cells.
Conclusions:
- Mosquito-borne flaviviruses have evolved effective strategies to suppress type I interferon immunity.
- A comprehensive understanding of these viral countermeasures is vital due to the lack of specific treatments.
- Further research into these mechanisms can inform the development of novel therapeutic interventions.
