TRIM7 inhibits encephalomyocarditis virus replication by activating interferon-β signaling pathway

Area of Science:

• Virology
• Immunology
• Molecular Biology

Background:

• The tripartite motif-containing protein 7 (TRIM7) is involved in innate immunity against viral infections.
• The specific role of TRIM7 in Encephalomyocarditis virus (EMCV) infection was previously uncharacterized.
• Understanding TRIM7's function in EMCV infection is crucial for developing antiviral strategies.

Purpose of the Study:

• To investigate the role of TRIM7 in the host's response to EMCV infection.
• To elucidate the molecular mechanisms by which TRIM7 influences EMCV replication and innate immunity.
• To determine if TRIM7 can be a target for anti-EMCV therapies.

Main Methods:

• Utilized HEK293T cells to study TRIM7 expression and function during EMCV infection.
• Employed gene overexpression and knockdown techniques to assess TRIM7's impact on EMCV replication.
• Analyzed the type I interferon (IFN) signaling pathway, including IFN-β promoter activity, RIG-I/MDA5/MAVS signaling, and TRIM7-MAVS interaction.

Main Results:

• TRIM7 expression was downregulated following EMCV infection in HEK293T cells.
• Overexpression of TRIM7 suppressed EMCV replication and enhanced IFN-β promoter activity.
• Knockdown of TRIM7 promoted EMCV infection and impaired IFN-β promoter activity, confirming TRIM7's inhibitory role.

Conclusions:

• TRIM7 plays a significant positive role in the type I interferon signaling pathway during EMCV infection.
• TRIM7 effectively suppresses EMCV replication, highlighting its antiviral function.
• TRIM7 emerges as a potential therapeutic target for developing novel anti-EMCV inhibitors.