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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Webb, C. F. Tucker, P. W. Nakai, C. |
| Description | Author Affiliation: Webb CF ( Department of Microbiology, University of Texas Southwestern Medical Center, Dallas 75235.); |
| Abstract | To examine the isotypic and structural requirements involved in signaling through the immunoglobulin (Ig) receptor on B lymphocytes, we established a panel of T15 idiotype-positive transfectants that expressed wild-type IgM, wild-type IgD, or hybrid IgM molecules. Growth inhibition of the transfected lymphoma cells in response to anti-idiotype antibodies was used to measure signaling. Hybrid IgM molecules were constructed so that the membrane-spanning region of the mu heavy chain was replaced by that of delta, gamma 2b, or alpha heavy chains or that of the I-Ab class II (Ia) alpha chain. All transfectants that expressed IgM or hybrid IgM molecules with membrane-spanning regions from another Ig isotype underwent signaling in response to anti-idiotype antibodies, whereas the IgM-Ia hybrid transfectants did not. Transfectants that expressed wild-type IgD molecules also underwent signaling, although this response was particularly sensitive to serum concentrations. These results imply that signaling occurs in a similar manner through heavy-chain receptors of any isotype and suggest that conserved amino acid sequences in the transmembrane regions are important in this process. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 6 |
| Volume Number | 86 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1989-04-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | B-Lymphocytes Immunology Immunoglobulin Heavy Chains Receptors, Immunologic Signal Transduction Amino Acid Sequence Animals Cell Division Cloning, Molecular Fluorescent Antibody Technique Histocompatibility Antigens Class II Genetics Immunoglobulin D Immunoglobulin Idiotypes Immunoglobulin Isotypes Immunoglobulin M Lymphoma Mice Molecular Sequence Data Plasmids Structure-Activity Relationship Transfection Tumor Cells, Cultured Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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