Abstract:
:The influence of MHC antigens on TCR gamma delta usage in CD8+ intraepithelial lymphocytes (IELs) was examined using a pan-reactive and V delta 4 region-specific MAb. While an average of 30% of IELs from the majority of mice of various MHC haplotypes were V delta 4+, a 2-fold or greater percentage of IELs from H-2k mice were V delta 4+. Analysis of IELs from F1 mice indicated that the increase in TCRs using V delta 4 was likely to be the result of positive selection. The V delta 4 usage patterns of IELs from recombinant inbred strains and from mice recombinant within H-2 revealed that the increase in V delta 4 usage mapped to H-2 and required I-E expression. Moreover, selection of TCRs using V delta 4 occurred in chimeric mice in the absence of a thymus. The results demonstrate an extrathymic selective mechanism for gamma delta TCRs of CD8+ IELs and suggest that these cells may exhibit MHC class II-restricted antigen recognition.
journal_name
Celljournal_title
Cellauthors
Lefrancois L,LeCorre R,Mayo J,Bluestone JA,Goodman Tdoi
10.1016/0092-8674(90)90166-csubject
Has Abstractpub_date
1990-10-19 00:00:00pages
333-40issue
2eissn
0092-8674issn
1097-4172pii
0092-8674(90)90166-Cjournal_volume
63pub_type
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