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Cytochemically demonstrable B-glucuronidase activity in normal and neoplastic human lymphoid cells
Blood
|December 1, 1980
Summary
BG activity correlates with T cell populations in normal and cancerous lymphocytes. While most T cells express BG, some B cell malignancies also show BG expression, suggesting activation or differentiation states.
Area of Science:
- Immunology
- Hematology
- Cell Biology
Background:
- Lymphocyte surface markers like la antigens, surface immunoglobulin (Slg), and sheep erythrocyte (E) rosettes are crucial for cell identification.
- Cytochemical staining for BG activity provides another dimension for characterizing lymphocyte populations.
- Understanding these markers aids in distinguishing normal lymphocytes from malignant cells in hematological disorders.
Purpose of the Study:
- To investigate the correlation between BG activity and established lymphocyte markers (la, Slg, E rosettes) in normal and neoplastic cells.
- To determine the utility of BG activity in differentiating T cell and B cell malignancies.
- To explore the potential relationship between BG expression and B cell activation or differentiation.
Main Methods:
- Mononuclear cell suspensions from peripheral blood and lymphoid tissues of normal individuals and patients with lymphoma/leukemia were analyzed.
- Cells were assessed for la antigens, Slg, E rosette formation, and acid alpha-naphthyl acetate esterase (ANAE) activity.
- Results were correlated with the expression of cytochemically demonstrable BG activity.
Main Results:
- BG+ lymphocyte percentages closely matched E+ (T) cell percentages in most normal tissues, with a potential E+BG- T cell subpopulation identified.
- Normal B lymphocytes rarely expressed BG activity.
- Neoplastic B cells from lymphomas were BG-, but a variable proportion of B cell chronic lymphocytic leukemia and multiple myeloma cells expressed BG activity.
- Neoplastic T cells showed variable BG expression (BG+ or BG-).
Conclusions:
- BG activity is a marker that generally correlates with T cell populations but can also be expressed by certain B cell populations, potentially indicating activation or differentiation.
- BG expression in T cell malignancies may reflect different stages of T cell differentiation.
- BG activity analysis could be a valuable tool for characterizing T cell phenotypes in malignancies.