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Review
. 2000 Apr;15(2):573-6.
doi: 10.14670/HH-15.573.

Memory B cells and CD27

Affiliations
Review

Memory B cells and CD27

K Agematsu. Histol Histopathol. 2000 Apr.

Abstract

Following antigen activation in germinal centers, B cells develop into memory B cells or plasma cells. Triggering via B-cell immunoglobulin receptors by antigens, cytokines and direct cell-to-cell contact by B and T cells plays an important role in the B cell differentiation into memory or plasma cells. Adult human peripheral blood B cells are separated into three subtypes by the expression of IgD and CD27, which belong to the tumor necrosis factor receptor (TNFR) family: IgD+ CD27- naive B cells, IgD+ CD27+ and IgD- CD27+ B cells. CD27+ B cells are larger cells with abundant cytoplasm carrying somatic hypermutation, and have an ability to produce immunoglobulin, indicating that CD27 is a memory marker of B cells. The ligation of CD27 yields crucial signals that positively control the entry of B cells into the pathway to plasma cells. We review observations on subpopulations and differentiation of mature B-cells by T/B cell interaction via CD27/CD70 as compared with CD40/CD154 interaction, and discuss about memory B cells.

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