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- W2033296938 abstract "Oligoclonal T cell expansions (TCE) are common in old humans and mice, but it is not known whether the T cell response to a specific antigen is more restricted in old vs. young animals. Herein, we describe an enhanced and prolonged response of tumor antigen-specific CD8 cells in old mice identified by K(d)/peptide tetramers and Vbeta10 staining. At the onset of the response CD8 T cell numbers and Vbeta10+CD8+ cells at the site of tumor injection were lower in old mice, hinting that control of initial tumor growth may not be optimal. As further evidence of a dysregulated response in old mice, antibody titers to the tumor were deficient and the CD8 tumor antigen-specific response was greater and more prolonged in the blood and spleen. Old mice selected a more oligoclonal TCR repertoire based on TCRbeta chain CDR3 length analysis and sequences. Persistent expansions of Vbeta10+CD8+ cells in old mice had memory/activation phenotypes. This induced tumor antigen-specific response may represent a model for the spontaneous TCE observed with aging and demonstrates that the CD8 response to a defined peptide/MHC antigen is indeed more oligoclonal in old mice." @default.
- W2033296938 created "2016-06-24" @default.
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- W2033296938 date "2002-06-01" @default.
- W2033296938 modified "2023-10-12" @default.
- W2033296938 title "Tumor antigen drives a persistent oligoclonal expansion of CD8+ T cells in aged mice" @default.
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- W2033296938 doi "https://doi.org/10.1002/1521-4141(200206)32:6<1650::aid-immu1650>3.0.co;2-q" @default.
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