Evaluating Baculovirus Infection Using Green Fluorescent Protein and Variants

Area of Science:

• Molecular Biology
• Virology
• Biotechnology

Background:

• Baculovirus expression systems are widely used for protein production in insect cells.
• Efficient monitoring of baculovirus infection is crucial for optimizing expression yields.
• Current methods for virus titration and infection monitoring can be time-consuming.

Purpose of the Study:

• To develop a facile and rapid method for monitoring baculovirus infection in insect cells.
• To simplify virus titer determination in the baculovirus expression system.
• To utilize green fluorescent protein (GFP) for in vivo visualization of infection.

Main Methods:

• Co-expression of green fluorescent protein (GFP) with baculovirus.
• Utilizing the early-to-late (ETL) promoter to drive GFP expression.
• Monitoring GFP fluorescence in Sf-9 insect cells for infection assessment.

Main Results:

• GFP co-expression allows for facile and rapid in vivo monitoring of baculovirus infection.
• GFP expression under the ETL promoter enables early detection of infection.
• The described techniques simplify vector construction, virus isolation, and titer determination.

Conclusions:

• Green fluorescent protein (GFP) is a valuable tool for real-time monitoring of baculovirus infection.
• The ETL promoter-GFP system facilitates efficient baculovirus vector development and titration.
• This approach enhances the usability of baculovirus expression systems.