Related Experiment Video
Updated: Jul 8, 2026

09:07
Using Zebrafish Models of Human Influenza A Virus Infections to Screen Antiviral Drugs and Characterize Host Immune Cell Responses
Published on: January 20, 2017
Influenza viruses: basic biology and potential drug targets
1Department of Microbiology, Box 1124, Mount Sinai School of Medicine, 1 Gustave L. Levy Place, New York, NY 10029, USA. chris.basler@mssm.edu
Infectious Disorders Drug Targets
|January 29, 2008
Summary
Influenza A and B viruses cause significant illness and death annually. New antiviral strategies are needed due to limited drug options and emerging resistance.
Area of Science:
- Virology
- Infectious Diseases
- Drug Discovery
Background:
- Influenza A and B viruses cause annual global morbidity and mortality.
- Influenza A viruses have caused devastating pandemics, with recent H5N1 avian outbreaks raising pandemic concerns.
- Current antiviral treatments target viral neuraminidase and M2 ion channels, but M2 inhibitors face resistance issues.
Purpose of the Study:
- To review the current landscape of influenza antiviral drugs.
- To highlight the limitations of existing treatments, including drug resistance.
- To explore emerging opportunities for novel antiviral strategies against influenza viruses.
Main Methods:
- Literature review of influenza virology and antiviral drug development.
- Analysis of current approved antiviral targets and their limitations.
- Identification of new potential targets within the influenza virus replication cycle.
Main Results:
- Approved influenza antivirals are limited to neuraminidase and M2 ion channel inhibitors.
- Amantadine and rimantadine (M2 inhibitors) exhibit significant drug resistance.
- The influenza virus replication cycle offers numerous potential targets for new drug development.
Conclusions:
- There is a critical need for novel antiviral therapies to combat influenza.
- Emerging research into the influenza virus replication cycle presents new opportunities for effective treatments.
- Developing drugs against new targets is essential to overcome existing resistance and improve pandemic preparedness.
Related Concept Videos
Influenza
Influenza is an acute, highly communicable viral disease that affects the respiratory tract and is responsible for seasonal epidemics worldwide. Influenza A is the most prevalent type associated with widespread outbreaks and is subtyped based on two surface glycoproteins: hemagglutinin (H) and neuraminidase (N), as in H1N1. These glycoproteins are essential for viral infectivity, transmission, and immune recognition. Transmission occurs primarily through respiratory droplets and contaminated...
Inhibitors Of Virion Release
Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
Leaky Scanning
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R stands for...
Inhibitors of Viral Protein Synthesis
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Viral Mutations
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
Viruses with RNA Genomes
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...

