Abstract:
:Human leucocytes from peripheral blood and tonsil were examined for the presence of the IL-3 receptor using monoclonal antibodies directed to epitopes of the alpha and beta chains of the receptor. We found that the beta chain, common to IL-3, IL-5, and GM-CSF, was either present at low levels or not detected on the majority of peripheral blood and tonsil B lymphocytes, while the alpha chain showed a distinct but restricted distribution. In peripheral blood the IL-3R alpha chain was limited to a subpopulation of peripheral B lymphocytes and a population of cells which lack lineage-specific markers. Dimly staining cells were identified as B lymphocytes as they coexpressed CD19, CD20, CD22, CD24, and HLA-DR. A brightly staining population lacks T and B lymphocyte, NK specific, and macrophage lineage markers but expresses CD9, CD45RO, CD26, and, in a proportion of cells, CD36 and CD60. This population remains unclassified. In tonsil tissue IL-3R alpha chain expression was strongest on B lymphocytes present in the T cell rich areas of tonsillar tissue. The IL-3R alpha bearing B tonsil cells included cells in both CD23 and IgD positive and negative populations. The phenotype of the IL-3R alpha positive B cells defines them as a population of B lymphocytes distinct from previously characterized cells in the lymphoid architecture. Lymphoblastoid cell lines with a corresponding phenotype were also identified.
journal_name
Cell Immunoljournal_title
Cellular immunologyauthors
Macardle PJ,Chen Z,Shih CY,Huang CM,Weedon H,Sun Q,Lopez AF,Zola Hdoi
10.1006/cimm.1996.0049subject
Has Abstractpub_date
1996-02-25 00:00:00pages
59-68issue
1eissn
0008-8749issn
1090-2163pii
S0008-8749(96)90049-0journal_volume
168pub_type
杂志文章abstract::This report compares the ability of cyclosporin A and FK-506 to inhibit human T cell activation triggered via cell surface molecules that utilize different intracellular processes. We stimulated highly purified peripheral blood T lymphocytes with mitogens (Con A and PHA), ionomycin + PMA, or monoclonal antibodies spec...
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journal_title:Cellular immunology
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