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The Journal of Immunology, Vol 154, Issue 5 2082-2091, Copyright © 1995 by American Association of Immunologists

ARTICLES

Perturbation of B cell genesis in the bone marrow of pristane-treated mice. Implications for plasmacytoma induction

SA Rico-Vargas, M Potter and DG Osmond
Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada.

A single injection of pristane was given i.p. to plasmacytoma- susceptible BALB/cAn mice. At intervals up to 6 mo thereafter, immunofluorescence labeling of intranuclear terminal deoxynucleotidyl transferase (TdT), cell surface B220 glycoprotein, cytoplasmic mu- chains of IgM (c mu), and surface mu-chains (s mu), together with mitotic arrest techniques, were used to quantitate the in vivo population dynamics of precursor B cells in the bone marrow. TdT- expressing pro-B cells (TdT+B220-, TdT+B220+), before the expression of mu-chains, showed sustained increases in both population size and the number of cells flowing through mitosis per unit time. In contrast, populations of pre-B cells (c mu + s mu -) and B cells (s mu +) were consistently depressed for long periods of time, including the phase of plasmacytoma formation. Precursor B cells in DBA/2 mice, a plasmacytoma- resistant strain, showed similar responses to pristane treatment. The results demonstrate that a single injection of pristane, which greatly increases the demand for macrophage activity in the peritoneal space, causes sustained distant alterations in B cell lymphopoiesis in the bone marrow; specifically, a prolonged increased proliferation of pro-B cells coupled with a depression and a exaggerated loss of pre-B cells and B cells. The protracted stress on B cell lymphopoiesis may be a predisposing factor in the subsequent development of c-myc-activating chromosomal rearrangements that play a critical role in plasmacytomagenesis.


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