Development of a novel protocol for generating flavivirus reporter particles

Area of Science:

• Virology
• Molecular Biology

Background:

• West Nile virus (WNV) infection poses a significant global public and animal health risk.
• Effective prevention, diagnosis, and treatment strategies for WNV are critically needed.
• Viral reverse genetics systems offer promising tools for WNV research and clinical applications.

Purpose of the Study:

• To develop an improved protocol for generating WNV reporter virus particles (RVPs).
• To address challenges of conventional RVP generation, including technical skill requirements and antibiotic resistance gene contamination.
• To provide a safer and more accessible method for WNV RVP production, especially for clinical settings.

Main Methods:

• Establishment of cell lines for constitutive replication of WNV RVP genome RNA without antibiotic resistance genes.
• Utilizing these cell lines for WNV RVP generation via simple transfection of viral structural protein expression vectors.
• Elimination of manual RNA handling steps inherent in traditional protocols.

Main Results:

• The novel protocol successfully generated WNV RVPs without requiring RNA handling.
• The established cell lines constitutively replicated RVP genome RNA, free from antibiotic resistance genes.
• WNV RVP yields were comparable to those achieved with conventional methods.

Conclusions:

• The developed protocol offers a simplified and safer alternative for WNV RVP generation.
• This method is particularly advantageous for clinical WNV virology research and applications.
• The protocol overcomes key limitations of existing methods, enhancing accessibility and safety.