Abstract:
:Limited studies have addressed the ability of gammadelta T cells to become memory populations. We previously demonstrated that WC1.1(+) gammadelta T cells from ruminants vaccinated with killed Leptospira borgpetersenii proliferate and produce IFN-gamma in recall responses. Here we show that this response is dependent upon antigen-responsive CD4 T cells, at least across transwell membranes; this requirement cannot be replaced by IL-2. The response was also dependent upon in vivo priming, since gammadelta T cells from leptospira vaccine-naive animals did not respond to antigen even when co-cultured across membranes from antigen-responsive PBMC. Gammadelta T cells were the major antigen-responding T cell population for the first 4 wks following vaccination and replicated more rapidly than CD4 T cells. Primed WC1(+) gammadelta T cells circulated as CD62L(hi)/CD45RO(int)/CD44(lo), characteristics of T(CM) cells. When stimulated with antigen, they decreased CD62L, increased CD44 and CD25, and had no change in CD45RO expression. These changes paralleled those of the leptospira antigen-responsive CD4 T cells but differed from those of gammadelta T cells proliferating to mitogen stimulation. This system for in vivo gammadelta T cell priming is unique, since it relies on a killed antigen to induce memory and may be pertinent to designing vaccines that require type 1 pro-inflammatory cytokines.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Blumerman SL,Herzig CT,Baldwin CLdoi
10.1002/eji.200636216subject
Has Abstractpub_date
2007-05-01 00:00:00pages
1204-16issue
5eissn
0014-2980issn
1521-4141journal_volume
37pub_type
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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
pub_type: 杂志文章
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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.1830060402
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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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