Dengue virus and the host innate immune response

Area of Science:

• Virology
• Immunology
• Infectious Diseases

Background:

• Dengue virus (DENV) is a mosquito-borne Flavivirus endemic in tropical/sub-tropical regions.
• Four antigenically distinct serotypes exist; primary infection confers short-term cross-protection, but subsequent heterotypic infections can cause severe disease.
• Understanding DENV's interaction with the innate immune system is crucial for therapeutic development.

Purpose of the Study:

• To review the innate immune response to DENV infection.
• To examine DENV's strategies for evading innate immune recognition and antiviral states.
• To highlight the importance of this knowledge for developing antivirals and vaccines.

Main Methods:

• This is a review article, synthesizing existing research on DENV and innate immunity.
• Focuses on DENV's evasion mechanisms against key innate immune pathways.
• Discusses the roles of type I interferon, complement, apoptosis, and autophagy in DENV infection.

Main Results:

• DENV infection activates several innate immune pathways, including type I interferon, complement, apoptosis, and autophagy.
• DENV actively evades these innate immune responses through mechanisms like escaping recognition or inhibiting antiviral states.
• The virus can also exploit these pathways to exacerbate disease progression.

Conclusions:

• DENV employs sophisticated strategies to subvert the host's innate immune system.
• Effective antivirals and vaccines require a comprehensive understanding of both host immune responses and viral evasion tactics.
• Further research into DENV-innate immunity interactions is essential for combating dengue.