Abstract:
:Mice were infected with Plasmodium (P.) yoelii blood-stage parasites. Both the liver and spleen were the sites of inflammation during malarial infection at the beginning of day 7. The major expanding cells were found to be NK1.1(-) intermediate alphabetaTCR (alphabetaTCR(int)) in the liver and spleen, although the population of NK1.1(+) alphabetaTCR(int) cells remained constant or slightly increased. These TCR(int) cells are of extrathymic origin or are generated by an alternative intrathymic pathway and are distinguished from conventional T cells of thymic origin. During malarial infection, the population of conventional T cells did not increase at all. TCR(int) cells purified from the liver of mice which had recovered from P. yoelii infection protected mice from malaria when they were transferred into 6.5-Gy-irradiated mice. Interestingly, the immunity against malaria seemed to disappear as a function of time after recovery, namely, mice which had recovered from malaria 1 year previously again became susceptible to malarial infection. The present results suggest that TCR(int) cells are intimately associated with protection against malarial infection and, therefore, that mice which had recovered from malaria 1 year previously lost such immunity.
journal_name
Cell Immunoljournal_title
Cellular immunologyauthors
Weerasinghe A,Sekikawa H,Watanabe H,Mannoor K,Morshed SR,Halder RC,Kawamura T,Kosaka T,Miyaji C,Kawamura H,Seki S,Abo Tdoi
10.1006/cimm.2000.1737subject
Has Abstractpub_date
2001-01-10 00:00:00pages
28-35issue
1eissn
0008-8749issn
1090-2163pii
S0008874900917374journal_volume
207pub_type
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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pub_type: 杂志文章
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journal_title:Cellular immunology
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
pub_type: 杂志文章
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journal_title:Cellular immunology
pub_type: 杂志文章
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