Related Experiment Videos
Interleukin 2 production by a marmoset B cell line
L H Brent1, T Miyawaki, M P Everson
1Department of Pediatrics, University of Alabama, Birmingham.
European Journal of Immunology
|May 1, 1990
Summary
Certain B cell lines can synthesize and secrete interleukin-2 (IL-2). This discovery challenges previous assumptions about IL-2 production, opening new avenues for research in immunology and B cell biology.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Interleukin-2 (IL-2) is a critical cytokine for T cell proliferation and function.
- IL-2 production has traditionally been attributed primarily to activated T cells.
Purpose of the Study:
- To investigate the potential of B cell lines to produce and secrete IL-2.
- To characterize the properties of IL-2 produced by a B cell line.
Main Methods:
- Derivation and cloning of Epstein-Barr virus-transformed marmoset B cell lines.
- Characterization of cell surface and cytoplasmic markers.
- Assay of IL-2 activity in cell supernatants using an IL-2-dependent T cell line (HT-2).
- Gel filtration chromatography and inhibition studies with monoclonal antibodies.
Main Results:
- A B cell line (KRC-18) constitutively secreted IL-2 activity.
- The secreted IL-2 was found in a 20-22 kDa fraction and exhibited cross-reactivity with antibodies to human IL-2 and the IL-2 receptor.
- Over 90% of KRC-18 cells contained intracellular IL-2.
Conclusions:
- Certain B lineage cell lines are capable of synthesizing and secreting functional IL-2.
- The IL-2 produced by B cells shares characteristics with T cell-derived IL-2.
- This finding expands the known sources of IL-2 and has implications for understanding immune regulation.