mRNA amplification system by viral replicase in transgenic plants

Area of Science:

• Plant biotechnology
• Molecular virology
• Biopharmaceutical production

Background:

• Traditional methods for producing therapeutic proteins can be costly and complex.
• Plant-based expression systems offer a potentially scalable and cost-effective alternative.

Purpose of the Study:

• To develop a novel plant-based expression system for human gamma interferon (IFN-gamma).
• To utilize the brome mosaic virus (BMV) RNA replication mechanism for enhanced gene expression in transgenic plants.

Main Methods:

• Construction of transgenic tobacco plants (M1x2-FCP2IFN) expressing BMV RNA replication genes.
• Introduction of a BMV RNA3 derivative encoding IFN-gamma.
• Analysis of IFN-gamma mRNA accumulation and protein expression.

Main Results:

• The BMV replicase efficiently replicated the RNA3 derivative and produced subgenomic mRNA for IFN-gamma.
• IFN-gamma mRNA accumulation was approximately 5-fold higher compared to the cauliflower mosaic virus (CaMV) 35S RNA promoter.
• Human gamma interferon (IFN-gamma) protein was successfully accumulated in the transgenic plants.

Conclusions:

• The BMV RNA replication system provides a highly efficient platform for expressing foreign genes, including therapeutic proteins, in plants.
• Transgenic tobacco plants can be engineered to produce functional human gamma interferon (IFN-gamma).
• This approach holds promise for the development of plant-based biopharmaceutical production systems.