Expression of B cell surface receptors. II. IL-4 can accelerate the developmental expression of the murine B cell IgE Fc receptor.
The ability of IL-4 to influence the developmental expression of the murine B cell IgE Fc receptor (Fc epsilon R) was examined. Spleen cells from neonatal mice of increasing age were incubated overnight with IL-4 and subsequently examined with multicolor flow cytometry. The results demonstrate that IL-4 can significantly increase the number of maturing B cells which express the Fc epsilon R. This effect was only seen however, on those neonatal B cells which already displayed surface IgD. Splenic B cells which were IgM+, IgD- failed to express the Fc epsilon R when treated with IL-4, even though they responded by increasing their level of class II Ag expression. Further experiments showed that the inability of IgD- immature B cells to express the Fc epsilon R could not be entirely explained by their assignment to the Ly-1 lineage. Taken together, these results indicate that IL-4 can accelerate the developmental expression of the B cell Fc epsilon R, but only on those B cells that are mature enough to express IgD.
Waldschmidt
T J
TJ
Department of Pathology, University of Iowa College of Medicine, Iowa City 52242.
Conrad
D H
DH
Lynch
R G
RG
D000818:Animals; D000831:Animals, Newborn / Q000276:immunology; D000944:Antigens, Differentiation, B-Lymphocyte / Q000276:immunology*; D000950:Antigens, Ly / Q000032:analysis; D001402:B-Lymphocytes / Q000276:immunology*; D002454:Cell Differentiation; D005434:Flow Cytometry; D000949:Histocompatibility Antigens Class II / Q000032:analysis; D007072:Immunoglobulin D / Q000032:analysis; D007075:Immunoglobulin M / Q000032:analysis; D015847:Interleukin-4 / Q000494:pharmacology*; D051379:Mice; D008807:Mice, Inbred BALB C; D011947:Receptors, Antigen, B-Cell / Q000032:analysis; D011961:Receptors, Fc / Q000276:immunology*; D017455:Receptors, IgE; D013154:Spleen / Q000276:immunology
D000944:Antigens, Differentiation, B-Lymphocyte; D000950:Antigens, Ly; D000949:Histocompatibility Antigens Class II; D007072:Immunoglobulin D; D007075:Immunoglobulin M; D011947:Receptors, Antigen, B-Cell; D011961:Receptors, Fc; D017455:Receptors, IgE; D015847:Interleukin-4