Endogenous ZAP is associated with altered Zika virus infection phenotype

Area of Science:

• Virology
• Immunology
• Molecular Biology

Background:

• The zinc finger antiviral protein 1 (ZAP) is an interferon-stimulated gene with broad antiviral functions.
• Previous research indicated Zika virus is resistant to ZAP's antiviral activity.
• Type I interferons (IFN-alpha and -beta) are crucial for antiviral responses.

Purpose of the Study:

• To investigate the antiviral activity of ZAP against Zika virus in a context lacking a robust type I interferon system.
• To explore the association of ZAP with global gene expression changes during Zika virus infection.

Main Methods:

• Utilizing Vero cells, which are deficient in IFN-alpha and -beta, to study ZAP's effect on Zika virus.
• Employing quantitative RNA-sequencing (RNA-seq) to analyze global gene expression patterns.

Main Results:

• ZAP was found to be associated with the inhibition of Zika virus replication in Vero cells, despite their type I interferon deficiency.
• Quantitative RNA-seq data revealed that endogenous ZAP influences global gene expression both at steady state and during Zika virus infection.

Conclusions:

• ZAP exhibits an interferon-independent antiviral activity against Zika virus.
• Further research is necessary to fully understand the mechanisms behind ZAP's anti-Zika virus activity and its broader involvement in cellular responses.