Interplay between dengue virus and Toll-like receptors, RIG-I/MDA5 and microRNAs: Implications for pathogenesis

Area of Science:

• Virology
• Immunology
• Molecular Biology

Background:

• Innate immunity plays a crucial role in recognizing viral infections.
• Dengue virus (DENV) poses a significant global health challenge.
• Components of innate immunity, including Toll-like receptors (TLRs), RIG-I/MDA5, and microRNAs (miRNAs), are involved in DENV recognition.

Purpose of the Study:

• To review current knowledge on DENV-host factor interactions.
• To emphasize the roles of TLRs, RIG-I/MDA5, and miRNAs in DENV infection.
• To explore the connection between these innate immune components and DENV pathogenesis.

Main Methods:

• Review of recent scientific literature on DENV-host interactions.
• Analysis of studies detailing the mechanisms of DENV recognition by innate immune sensors.
• Examination of how DENV manipulates or evades host antiviral responses.

Main Results:

• TLR3, TLR7/8, and RIG-I/MDA5 recognize viral RNA, initiating interferon and cytokine production.
• TLR2 and TLR4 activation influences viral replication independently of interferon.
• Cellular miRNAs can directly or indirectly impact DENV replication and modulate immune responses.

Conclusions:

• TLRs, RIG-I/MDA5, and miRNAs are key players in the innate immune response to DENV.
• DENV has evolved sophisticated mechanisms to counteract host antiviral defenses.
• Understanding these interactions is vital for developing effective DENV therapeutics.