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Altered B-cell receptor signaling kinetics distinguish human follicular lymphoma. B cells from tumor-infiltrating nonmalignant B cells
Altered B-cell receptor signaling kinetics distinguish human follicular lymphoma. B cells from tumor-infiltrating nonmalignant B cells BLOOD Irish, J. M., Czerwinski, D. K., Nolan, G. P., Levy, R. 2006; 108 (9): 3135-3142Abstract
The B-cell receptor (BCR) transmits life and death signals throughout B-cell development, and altered BCR signaling may be required for survival of B-lymphoma cells. We used single-cell signaling profiles to compare follicular lymphoma (FL) B cells and nonmalignant host B cells within individual patient biopsies and identified BCR-mediated signaling events specific to lymphoma B cells. Expression of CD20, Bcl-2, and BCR light chain isotype (kappa or lambda) distinguished FL tumor B-cell and nontumor host B-cell subsets within FL patient biopsies. BCR-mediated signaling via phosphorylation of Btk, Syk, Erk1/2, and p38 occurred more rapidly in tumor B cells from FL samples than in infiltrating nontumor B cells, achieved greater levels of per-cell signaling, and sustained this level of signaling for hours longer than nontumor B cells. The timing and magnitude of BCR-mediated signaling in nontumor B cells within an FL sample instead resembled that observed in mature B cells from the peripheral blood of healthy subjects. BCR signaling pathways that are potentiated specifically in lymphoma cells should provide new targets for therapeutic attention.
View details for DOI 10.1182/blood-2006-02-003921
View details for Web of Science ID 000241586100043
View details for PubMedID 16835385
View details for PubMedCentralID PMC1895530