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Partial purification and characterization of Syrian hamster interferon
The Journal of General Virology
|February 1, 1981
Summary
Syrian golden hamster interferon was produced and purified, revealing two distinct components with specific ionic properties and a molecular weight of 17,000. A subpopulation of these molecules exhibited cross-species activity on mouse cells.
Area of Science:
- Virology
- Immunology
- Biochemistry
Background:
- Interferons (IFNs) are crucial antiviral proteins.
- Characterizing species-specific IFNs aids in understanding immune responses.
- Syrian golden hamster interferon (IFN) production and properties are not fully elucidated.
Purpose of the Study:
- To produce and characterize Syrian golden hamster interferon.
- To investigate the purification and molecular properties of hamster IFN.
- To assess the cross-species activity of hamster IFN on mouse cells.
Main Methods:
- Hamster embryo cells were stimulated with Newcastle disease virus to produce IFN.
- Chromatographic techniques including ion exchange and isoelectric focusing were employed for characterization and purification.
- Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) was used to estimate molecular weight.
Main Results:
- High titers of hamster IFN (1000-6000 units/ml) were obtained.
- Isoelectric focusing revealed two IFN components (pI 5.8 and pI 6.6).
- Purified IFN showed a specific activity of ~1 x 10^6 units/mg protein, with an estimated molecular weight of 17,000 Da.
- A subpopulation of hamster IFN molecules demonstrated cross-species activity on mouse cells, isolable via phenylagarose chromatography.
Conclusions:
- Syrian golden hamster IFN is composed of at least two distinct molecular species.
- The purification process yielded highly active hamster IFN.
- Specific hamster IFN molecules possess cross-species antiviral activity, suggesting potential for broader therapeutic applications.