Efficient reverse genetics approach involving infectious subgenomic amplicon for engineering dengue virus

Area of Science:

• Virology
• Molecular Biology
• Genetics

Background:

• Dengue virus (Flaviviridae family) causes mild to severe illness.
• Traditional full-length Flavivirus genome construction in bacteria is challenging due to instability and toxicity.
• Limitations exist in current methods for studying dengue virus pathogenesis.

Purpose of the Study:

• To evaluate the modified infectious subgenomic amplicon (ISA) method for dengue virus reverse genetics.
• To establish a more efficient system for dengue virus genetic engineering.
• To overcome challenges associated with full-length Flavivirus genome construction.

Main Methods:

• Employed the modified infectious subgenomic amplicon (ISA) method.
• Generated recombinant dengue viruses de novo.
• Validated virus replication in human and insect cell lines.
• Genetically modified dengue virus serotype 4 by inserting a green fluorescence protein gene.

Main Results:

• Recombinant dengue viruses generated using ISA showed robust replication comparable to original strains.
• ISA demonstrated effectiveness in genetically modifying the dengue virus genome.
• Successful insertion of the green fluorescence protein gene confirmed ISA's efficiency.

Conclusions:

• The infectious subgenomic amplicon (ISA) method is effective for dengue virus genetic engineering.
• ISA provides a convenient reverse genetics system for dengue virus research.
• This approach can expedite investigations into dengue virus pathogenesis and facilitate the development of interventions.