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Purification of human B cell growth factor
Journal of Immunology (Baltimore, Md. : 1950)
|November 1, 1985
Summary
Researchers purified human B cell growth factor (BCGF) from cell-conditioned medium using advanced chromatography. This method isolates BCGF, a key factor for B cell proliferation, with high purity and yield.
Area of Science:
- Immunology
- Biochemistry
Background:
- Human B cell growth factor (BCGF) is crucial for B cell proliferation.
- Previous purification methods yielded low amounts of BCGF.
Purpose of the Study:
- To develop an efficient purification protocol for human BCGF.
- To isolate BCGF from lectin-stimulated peripheral blood mononuclear cell-conditioned medium.
Main Methods:
- Purification involved ion exchange, affinity binding, and gel filtration chromatography.
- A key step utilized hydroxylapatite for differential cytokine binding.
- Final purification employed high-pressure liquid chromatography (HPLC) with anion exchange and size exclusion.
Main Results:
- BCGF was purified with a molecular weight of 12,000-14,000 daltons.
- A high-yield hydroxylapatite step effectively removed co-eluting cytokines.
- Analytical HPLC confirmed BCGF purity, showing a single band on SDS-PAGE.
Conclusions:
- The developed purification strategy efficiently isolates human BCGF.
- This protocol provides a reliable method for obtaining pure BCGF for further research.