title: The expression of B cell surface receptors. III. The murine low-affinity IgE Fc receptor is not expressed on Ly 1 or 'Ly 1-like' B cells.
abstract: The distribution of IgE FcR (Fc epsilon R)-positive and -negative B cells was examined in normal adult mice. Using three-color flow cytometry, the expression of the Fc epsilon R was analyzed on various B-cell subsets present in the peritoneum and spleen. The results demonstrate that in the peritoneal cavity, the Fc epsilon R is not expressed on the large majority of Ly 1+ B cells and Ly 1-, Mac 1+ sister B cells. The receptor is present, however, on the small number of conventional B cells residing in the peritoneum. Although interleukin 4 (IL-4) can increase the levels of the Fc epsilon R on conventional B cells, incubation of Ly 1 and sister B cells with IL-4 did not result in the expression of the Fc epsilon R. When examining B cells present in the spleen, a small subset of B cells was consistently found to be Fc epsilon R-. These Fc epsilon R- cells were IgM-bright, IgD-dull and largely Ly 1- and Mac 1-negative. Staining of splenic tissue sections revealed that the Fc epsilon R- B cells were primarily localized to the marginal zones, whereas the Fc epsilon R+ B cells were found in the follicles. Taken together, the results indicate that the Fc epsilon R may be a useful marker in delineating the various B-cell subsets. In the peritoneum, the Fc epsilon R appears to discriminate conventional B cells from those of the Ly 1/sister lineage, and in the spleen it is likely to distinguish resting follicular B cells from Ly 1/sister and marginal zone B cells.
authors.affiliation: Department of Pathology, University of Iowa College of Medicine, Iowa City 52242.
authors.forename: T J
authors.initials: TJ
authors.lastname: Waldschmidt
authors.forename: F G
authors.initials: FG
authors.lastname: Kroese
authors.forename: L T
authors.initials: LT
authors.lastname: Tygrett
authors.forename: D H
authors.initials: DH
authors.lastname: Conrad
authors.forename: R G
authors.initials: RG
authors.lastname: Lynch
mesh_terms: D000818:Animals; D000944:Antigens, Differentiation, B-Lymphocyte / Q000378:metabolism*; D000950:Antigens, Ly; D001402:B-Lymphocytes / Q000276:immunology*; D005260:Female; D007073:Immunoglobulin E / Q000378:metabolism; D007075:Immunoglobulin M / Q000378:metabolism; D066298:In Vitro Techniques; D015847:Interleukin-4 / Q000494:pharmacology; D016177:Macrophage-1 Antigen; D051379:Mice; D008815:Mice, Inbred Strains; D010529:Peritoneal Cavity / Q000166:cytology; D011947:Receptors, Antigen, B-Cell / Q000378:metabolism*; D011961:Receptors, Fc / Q000378:metabolism*; D017455:Receptors, IgE; D013045:Species Specificity; D013154:Spleen / Q000166:cytology
chemical_list: D000944:Antigens, Differentiation, B-Lymphocyte; D000950:Antigens, Ly; D007075:Immunoglobulin M; D016177:Macrophage-1 Antigen; D011947:Receptors, Antigen, B-Cell; D011961:Receptors, Fc; D017455:Receptors, IgE; D015847:Interleukin-4; D007073:Immunoglobulin E