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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Do, M. S. Maecker, H. T. Levy, S. |
| Description | Author Affiliation: Maecker HT ( Department of Medicine/Oncology, Stanford University Medical Center, Stanford, CA 94305, USA. hmaecker@cmgm.stanford.edu); |
| Abstract | Mice lacking CD81 (TAPA-1), a widely expressed tetraspanin molecule, have impaired antibody responses to protein antigens. This defect is specific to antigens that preferentially stimulate a T helper 2 response (ovalbumin or keyhole limpet hemocyanin in alum) and is only seen with T cell-dependent antigens. Absence of CD81 on B cells is sufficient to cause the defect. Also, antigen-specific interleukin (IL) 4 production is greatly reduced in the spleen and lymph nodes of CD81-null mice compared with heterozygous littermates. Thus, expression of CD81 on B cells is critical for inducing optimal IL-4 and antibody production during T helper 2 responses. These findings suggest that CD81 may interact with a ligand on T cells to signal IL-4 production. By using a soluble form of CD81 as a probe, a putative ligand for CD81 was identified on a subset of B and T cells. Two possible models for the interaction of CD81 on B cells with a potential ligand on either B or T cells are proposed. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 5 |
| Volume Number | 95 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1998-04-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antigens, CD Genetics Physiology B-Lymphocytes Immunology Interleukin-4 Biosynthesis Th2 Cells Animals Antibody Formation Antigens, CD81 Chimera Enzyme-Linked Immunosorbent Assay Hemocyanin Heterozygote Immunoglobulin G Blood Interferon-gamma Secretion Lymph Nodes Membrane Proteins Deficiency Mice Mice, Knockout Models, Immunological Ovalbumin Spleen Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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