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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | La Gruta, Nicole L. Kedzierska, Katherine Doherty, Peter C. Davenport, Miles P. Turner, Stephen J. |
| Description | Author Affiliation: Kedzierska K ( Department of Microbiology and Immunology, University of Melbourne, Parkville 3010, Melbourne, Australia.); |
| Abstract | Prior analysis has characterized the clonal characteristics of effector CD8(+) T cells specific for the prominent influenza A virus nucleoprotein (NP) and acid polymerase (PA) peptides presented by H2D(b). Using a single-cell approach and determination of CDR3beta profiles, a limited, predominantly 'public' repertoire was found for CD8(+)D(b)NP(366)(+)Vbeta8.3+ cells, whereas diverse and 'private' T cell antigen receptor (TCR)beta clonotypes were typical of the CD8(+)D(b)PA(224)(+)Vbeta7+ response. This single-cell approach has now been used to relate the contributions of particular clonotypes (or affinities) to high-avidity TCRs, as defined by binding under conditions of limiting tetramer availability. At least by the measure of CDR3beta usage, no difference could be found between total and high-avidity populations in the spectrum of TCR-pMHC affinities throughout the limited, and relatively public, CD8(+)D(b)NP(366)(+)Vbeta8.3+ populations. Conversely, the more even (by clone size), diverse, and private CD8(+)D(b)PA(224)(+)Vbeta7+ response was characterized by the clear partitioning of the largest T cell clones in the high-avidity compartment. These results suggest that the relatively constrained CD8(+)D(b)NP(366)(+)Vbeta8.3+ set utilizes a relatively narrow range of affinities, whereas the broader CD8(+)D(b)PA(224)(+)Vbeta7+ response is induced at a range of TCR-pMHC affinities. Thus, whereas TCR sequence (or affinity) appears to contribute substantially to the avidity profile of diverse virus-specific CD8+ populations, other mechanisms may be prominent where the TCR spectrum is more limited. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 32 |
| Volume Number | 102 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2005-08-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antibody Affinity Immunology CD8-Positive T-Lymphocytes Metabolism Epitopes Nucleoproteins RNA-Binding Proteins Receptors, Antigen, T-Cell Viral Core Proteins Animals Bronchoalveolar Lavage Virology Mice Mice, Inbred C57BL Spleen Comparative Study Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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