Human normal CD5+ B lymphocytes can be induced to differentiate to CD5- B
lymphocytes with germinal center cell features
F Caligaris-Cappio, M Riva, L Tesio, M Schena, G Gaidano and L Bergui
Dipartimento di Scienze Biomediche e Oncologia Umana, Universita di Torino,
Italy.
A significant proportion of cord blood CD5+ B cells express the activation
molecules CD23, CD25, and transferrin receptor; react with the
cell-cycle-associated monoclonal antibody (MoAb) Ki67; can be induced to
enter the S phase of cell cycle by interleukin-2 (IL-2), IL- 4, or
low-molecular-weight B-cell growth factor (Imw-BCGF) and, exposed to IL-1
and IL-2, acquire the features (sIgD-, CD5-, CD10+, CD38+) of B blasts
proliferating in the germinal centers of secondary follicles. These
findings indicate that CD5+ B cells are preactivated and, in the proper
microenvironment, may give rise to CD5- B cells.
Volume 73,
Issue 5,
pp. 1259-1263,
04/01/1989
Copyright © 1989 by The American Society of Hematology