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Polypeptides on human B lymphocytes associated with cell activation
Human Immunology
|May 1, 1986
Summary
Two novel monoclonal antibodies, BB-1 and LB-2, identify distinct proteins (Bp37 and p76) on activated human B cells. These B-cell markers show unique expression patterns, aiding in B-cell subset identification.
Area of Science:
- Immunology
- Cell Biology
Background:
- Monoclonal antibodies (MoAbs) are crucial tools for identifying cell surface markers.
- Understanding B-cell heterogeneity and activation states requires specific molecular markers.
Purpose of the Study:
- To characterize two novel monoclonal antibodies, BB-1 and LB-2.
- To identify and analyze the distinct polypeptides recognized by BB-1 and LB-2 on human B cells.
Main Methods:
- Monoclonal antibody production and characterization.
- Analysis of polypeptide expression on B-cell subsets using biochemical and immunological techniques.
- Tissue distribution studies of identified antigens.
Main Results:
- BB-1 MoAb recognizes a 37,000-dalton polypeptide (Bp37) on pre-B and B-cell blasts and malignancies.
- LB-2 MoAb recognizes a 76,000-dalton polypeptide (p76) on resting B cells, activated B cells, and T cells.
- Bp37 and p76 expression levels differ between tonsillar B-cell subsets (germinal center vs. mantle zone) and are distinct from known B-cell antigens.
Conclusions:
- BB-1 and LB-2 identify novel B-cell surface antigens, Bp37 and p76, respectively.
- These antigens exhibit distinct expression patterns on human B-cell subsets and activation states.
- Bp37 and p76 represent new markers for differentiating B-cell populations and may aid in understanding B-cell biology.