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Isolation and partial characterization of human T-cell growth factor
Biochemical and Biophysical Research Communications
|December 16, 1983
Summary
Researchers isolated human T-cell growth factor (TCGF) from Jurkat leukemia cells. This purified TCGF effectively stimulates T-cell proliferation in vitro, offering insights into T-cell growth regulation.
Area of Science:
- Immunology
- Molecular Biology
- Biochemistry
Background:
- Human T-cell growth factor (TCGF) is crucial for T-lymphocyte proliferation.
- Understanding TCGF's properties requires efficient isolation methods.
Purpose of the Study:
- To isolate and characterize human T-cell growth factor (TCGF) from Jurkat T-leukemia cell line conditioned media.
- To assess the biological activity of the isolated Jurkat cell-derived TCGF (jTCGF) in stimulating T-cell proliferation.
Main Methods:
- High-efficiency isolation using hollow fiber concentration, gel filtration, and three steps of reverse-phase HPLC.
- Molecular weight determination and amino acid composition analysis.
- In vitro T-cell proliferation assays measuring 3H-thymidine incorporation.
Main Results:
- Successfully isolated 100 to 600 pmol of TCGF per liter of conditioned medium.
- Determined the molecular weight of jTCGF to be 15,750.
- Confirmed that jTCGF is highly active in stimulating T-cell proliferation in vitro.
Conclusions:
- The isolation procedure yielded a highly pure and active form of human TCGF from Jurkat cells.
- The characterized jTCGF demonstrates potent T-cell proliferative activity, consistent with its known function.
- This study provides a method for obtaining biologically active TCGF for further research into T-cell biology and immune responses.