Abstract:
:Rat CD4+ T cells are divided phenotypically by the anti-CD45RC monoclonal antibody OX22 into subsets with contrasting functions. Stimulation of T cells in vitro is known to induce a change in isoform from CD45RC+ to CD45RC-. We have investigated the in vitro conditions which promote a switch in isoform in the opposite direction. We observed that a majority of CD45RC- CD4 T cells (> 90%) spontaneously re-expressed CD45RC during the first 1-3 days of culture in both the presence and absence of alloantigen. The T cells remained CD45RC+ when cultured for 7 days in serum-free growth medium. However, alloantigen-activated lymphocytes, expressing the interleukin-2 receptor (IL-2R), downregulated CD45RC by day 4 and remained CD45RC- during the course of the experiment. Using mixtures of allotype-marked CD45RC+ and CD45RC- T cells, it was demonstrated that each subset showed comparable survival, IL-2R expression and time courses of activation in response to alloantigen. The repertoire of neither subset was, therefore, deficient in terms of allorecognition. The rapid re-expression of CD45RC in culture was accompanied by a change in function: CD45RC+ "converts", obtained by overnight culture of CD45RC- T cells, induced significantly higher graft-versus-host responses. Thus, the transition in culture from CD45RC- to CD45RC+ reflects a major functional reprogramming of the cell and not a trivial modulation of a surface antigen.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Sarawar SR,Sparshott SM,Sutton P,Yang CP,Hutchinson IV,Bell EBdoi
10.1002/eji.1830230117subject
Has Abstractpub_date
1993-01-01 00:00:00pages
103-9issue
1eissn
0014-2980issn
1521-4141journal_volume
23pub_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
pub_type: 杂志文章
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更新日期:1993-10-01 00:00:00
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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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journal_title:European journal of immunology
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journal_title:European journal of immunology
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doi:10.1002/eji.200839004
更新日期:2009-07-01 00:00:00
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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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更新日期:2001-04-01 00:00:00
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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
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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更新日期:1992-11-01 00:00:00
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pub_type: 杂志文章
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更新日期:2018-04-01 00:00:00