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Updated: Jun 17, 2026

Early Viral Entry Assays for the Identification and Evaluation of Antiviral Compounds

Early Viral Entry Assays for the Identification and Evaluation of Antiviral Compounds

Published on: October 29, 2015

Defective interfering viruses and their potential as antiviral agents.

A C Marriott¹, N J Dimmock

¹Department of Biological Sciences, University of Warwick, Coventry CV4 7AL, UK. a.c.marriott@warwick.ac.uk

Reviews in Medical Virology

|December 31, 2009

Summary

Defective interfering (DI) viruses are naturally occurring viral mutants with deleted genomes. These DI viruses can suppress helper virus production and show potential as novel antiviral agents.

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Area of Science:

Virology
Molecular Biology
Immunology

Background:

Defective interfering (DI) viruses are spontaneously generated viral mutants.
DI viruses possess deletions in critical viral genome portions, rendering essential genes non-functional.
DI virus replication necessitates a complete, functional viral genome for providing missing functions.

Purpose of the Study:

To review the fundamental properties of DI viruses.
To explore the potential mechanisms underlying viral interference mediated by DI viruses.
To discuss the advancements in utilizing DI viruses, particularly those from influenza A virus, as antiviral agents.

Main Methods:

Literature review of existing research on DI viruses.
Analysis of viral interference mechanisms.
Evaluation of DI virus applications in antiviral therapy.

Main Results:

DI viruses are characterized by genomic deletions and dependence on helper viruses for replication.
DI viruses exhibit interference, suppressing helper virus production in co-infected cells.
Observed attenuation of disease in animals infected with DI viruses.

Conclusions:

DI viruses possess unique properties making them valuable research tools.
DI viruses demonstrate significant potential as a novel class of antiviral agents.
Further research into influenza A virus-derived DI viruses could lead to new therapeutic strategies.