Abstract:
:Immunotherapies that augment antitumor T cells have had recent success for treating patients with cancer. Here we examined whether tumor-specific CD4(+) T cells enhance CD8(+) T-cell adoptive immunotherapy in a lymphopenic environment. Our model employed physiological doses of tyrosinase-related protein 1-specific CD4(+) transgenic T cells-CD4(+) T cells and pmel-CD8(+) T cells that when transferred individually were subtherapeutic; however, when transferred together provided significant (p ≤ 0.001) therapeutic efficacy. Therapeutic efficacy correlated with increased numbers of effector and memory CD8(+) T cells with tumor-specific cytokine expression. When combined with CD4(+) T cells, transfer of total (naïve and effector) or effector CD8(+) T cells were highly effective, suggesting CD4(+) T cells can help mediate therapeutic effects by maintaining function of activated CD8(+) T cells. In addition, CD4(+) T cells had a pronounced effect in the early posttransfer period, as their elimination within the first 3 days significantly (p < 0.001) reduced therapeutic efficacy. The CD8(+) T cells recovered from mice treated with both CD8(+) and CD4(+) T cells had decreased expression of PD-1 and PD-1-blockade enhanced the therapeutic efficacy of pmel-CD8 alone, suggesting that CD4(+) T cells help reduce CD8(+) T-cell exhaustion. These data support combining immunotherapies that elicit both tumor-specific CD4(+) and CD8(+) T cells for treatment of patients with cancer.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Church SE,Jensen SM,Antony PA,Restifo NP,Fox BAdoi
10.1002/eji.201343718subject
Has Abstractpub_date
2014-01-01 00:00:00pages
69-79issue
1eissn
0014-2980issn
1521-4141journal_volume
44pub_type
杂志文章abstract::Recent experimental studies have greatly clarified the function of cell surface molecules in the induction and modulation of T cell responses by antigen-presenting cells (APC). However, the differences in ability to stimulate T cells evident for different types and subpopulations of the same APC, such as dendritic cel...
journal_title:European journal of immunology
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abstract::Ikaros is a transcriptional regulator whose function is essential for B cell development. It is expressed in the hematopoietic stem cell (HSC) through the mature B cell stage. Using genetically engineered mice in which the endogenous Ikaros gene is disrupted, it has been shown that a lack of Ikaros leads to a block in...
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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doi:10.1002/eji.1830240405
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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journal_title:European journal of immunology
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