Focusing on the Influenza Virus Polymerase Complex: Recent Progress in Drug Discovery and Assay Development
Jiantao Zhang1, Yanmei Hu1, Rami Musharrafieh2
1Department of Pharmacology and Toxicology, College of Pharmacy, The University of Arizona, Tucson, Arizona 85721, United States.
Abstract:
Influenza viruses are severe human pathogens that pose persistent threat to public health. Each year more people die of influenza virus infection than that of breast cancer. Due to the limited efficacy associated with current influenza vaccines, as well as emerging drug resistance from small molecule antiviral drugs, there is a clear need to develop new antivirals with novel mechanisms of action. The influenza virus polymerase complex has become a promising target for the development of the next-generation of antivirals for several reasons. Firstly, the influenza virus polymerase, which forms a heterotrimeric complex that consists of PA, PB1, and PB2 subunits, is highly conserved. Secondly, both individual polymerase subunit (PA, PB1, and PB2) and inter-subunit interactions (PA-PB1, PB1- PB2) represent promising drug targets. Lastly, growing insight into the structure and function of the polymerase complex has spearheaded the structure-guided design of new polymerase inhibitors. In this review, we highlight recent progress in drug discovery and assay development targeting the influenza virus polymerase complex and discuss their therapeutic potentials.
Insights
New influenza antivirals are needed due to vaccine limitations and drug resistance. Targeting the conserved influenza virus polymerase complex offers a promising strategy for developing next-generation therapeutics with novel mechanisms of action.
Area of Science:
- Virology
- Drug Discovery
- Structural Biology
Background:
- Influenza viruses are significant global health threats, causing substantial mortality annually.
- Current influenza vaccines exhibit limited efficacy, and antiviral drug resistance is emerging.
- There is an urgent need for novel antiviral strategies against influenza infections.
Purpose of the Study:
- To review recent advancements in drug discovery targeting the influenza virus polymerase complex.
- To discuss the development of assays for identifying new influenza polymerase inhibitors.
- To evaluate the therapeutic potential of targeting the influenza virus polymerase complex.
Main Methods:
- Structure-guided design of polymerase inhibitors.
- Development of drug discovery assays.
- Review of current research on influenza polymerase complex inhibitors.
Main Results:
- The influenza virus polymerase complex (PA, PB1, PB2 subunits) is a conserved and viable drug target.
- Inhibitors targeting individual subunits and inter-subunit interactions show therapeutic promise.
- Progress in understanding polymerase structure facilitates rational drug design.
Conclusions:
- The influenza virus polymerase complex is a highly promising target for next-generation antiviral drug development.
- Structure-based drug design and novel assay development are key to discovering effective influenza polymerase inhibitors.
- Targeting the polymerase complex offers a potential solution to overcome limitations of current influenza therapies.
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