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Purification of transfer factors.
1Conrad D. Stephenson Laboratory for Research in Immunology, National Jewish Center for Immunology and Respiratory Medicine, Denver, Colorado.
Molecular Immunology
|February 1, 1992
Summary
Researchers purified transfer factors, crucial for cell-mediated immunity, enabling molecular analysis. This breakthrough offers insights into the nature and function of these potent immune response inducers.
Area of Science:
- Immunology
- Molecular Biology
Background:
- Transfer factors are key inducers of cell-mediated immune responses, studied for decades.
- Lack of purified transfer factors has hindered molecular and cellular analysis.
- Understanding transfer factor mechanisms is vital for immunology research.
Purpose of the Study:
- To purify transfer factors to homogeneity for molecular analysis.
- To characterize the biophysical and functional properties of purified transfer factors.
- To establish definitions for unit transfer factor activity and specific activity.
Main Methods:
- Affinity chromatography, reversed-phase, and polytypic high-performance liquid chromatography (HPLC) for purification.
- Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) for molecular weight determination.
- In vivo assay for immunological activity and chromatographic methods for characterization.
Main Results:
- Murine transfer factors for specific antigens were purified to virtual homogeneity.
- Purified transfer factors were recovered in high yield, retaining biological activity and antigen specificity.
- Transfer factors identified as low molecular weight (approx. 5,000), highly polar, hydrophilic molecules with potent activity.
Conclusions:
- The availability of purified transfer factors is a significant advancement in immunology.
- This purification enables definitive studies on the nature, production, and action of transfer factors.
- Characterization provides a foundation for understanding immune response modulation.