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| Content Provider | PubMed Central |
|---|---|
| Abstract | Medullary, peanut agglutinin-negative (PNA-), thymocytes were activated in vitro with either exogenous interleukin 1 (IL-1) or accessory cells. T cell blasts from these cultures were subsequently fused to BW5147 to generate thymocyte hybridomas. Fusion frequencies similar to those obtained with peripheral T lymphocytes were observed. A high frequency of these hybrids are triggered to produce IL-2 in the presence of syngeneic accessory cells. Exogenous, nominal antigens do not appear to be required for this activation. Using accessory cells from a series of recombinant inbred mice, the specificity of this hybrid-accessory cell interaction could be mapped to either I-Ak or I-Ek or both. This was confirmed by blocking with alpha Ia monoclonal antibodies (mAbs). A high frequency of these self-reactive cells are also alloreactive. Interestingly, several clones were identified that appear to recognize public Ia determinants broadly shared by different alleles and genetic subregions. Such specificities appear to contrast with those of peripheral T lymphocytes whose specificity is dominated by the genetically polymorphic portion of the Ia molecule. These results document the clonal specificity occurring in the cultures of in vitro activated thymocytes and allow an analysis of at least a portion of the intrathymic repertoire for major histocompatibility complex (MHC) determinants. The implications of these findings are discussed. |
| Starting Page | 799 |
| File Format | |
| ISSN | 15409538 |
| e-ISSN | 15409538 |
| Journal | The Journal of Experimental Medicine |
| Issue Number | 3 |
| Volume Number | 160 |
| Language | English |
| Publisher | The Rockefeller University Press |
| Publisher Date | 1984-09-01 |
| Access Restriction | Open |
| Rights Holder | The Rockefeller University Press |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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