High level expression of biologically active canine interferon-alpha subtype 4 using a baculovirus
Ruttapong Ruttanapumma1, Manami Anzai, Masaoki Takegawa
1Laboratory of Zoonoses, School of Veterinary Medicine and Animal Sciences, Kitasato University, Towada, Aomori, Japan.
The Journal of Veterinary Medical Science
|January 11, 2007
Summary
Researchers produced high levels of canine interferon-alpha subtype 4 (CaIFN-alpha4) using a baculovirus system. The purified protein demonstrated significant antiviral activity, offering potential therapeutic applications.
Area of Science:
- Biotechnology
- Molecular Biology
- Immunology
Background:
- Canine interferon-alpha (CaIFN-alpha) plays a crucial role in antiviral immunity.
- Efficient expression systems are needed for producing bioactive CaIFN-alpha for research and therapeutic purposes.
Purpose of the Study:
- To develop a high-yield expression system for bioactive recombinant canine interferon-alpha subtype 4 (CaIFN-alpha4).
- To characterize the antiviral activity of the purified recombinant CaIFN-alpha4.
Main Methods:
- Utilized a baculovirus expression system for recombinant protein production.
- Engineered CaIFN-alpha4 with a C-terminal histidine hexamer tag (CaIFN-alpha4His) for purification.
- Employed SDS-PAGE and Coomassie Brilliant Blue staining for protein detection and analysis.
- Assayed antiviral activity against Vesicular stomatitis virus.
Main Results:
- Achieved high-level expression of CaIFN-alpha4His in insect cells.
- Successfully purified approximately 1 mg of CaIFN-alpha4His from 300 ml of culture supernatant with a specific activity of 5.0 x 10(7) units/mg.
- Demonstrated significant antiviral activity of the purified CaIFN-alpha4His against Vesicular stomatitis virus in cell lines.
Conclusions:
- The baculovirus system is effective for high-yield production of bioactive CaIFN-alpha4.
- Purified CaIFN-alpha4His exhibits potent antiviral properties, suggesting its therapeutic potential in canine viral infections.
