Abstract:
:To investigate autologous antigen recognition, we developed two autoreactive CD4+ T-cell clones, A2 and A10, maintained with non-T cells and IL-2. Autologous non-T-cell stimulation of the T-cell clones resulted in a decrease in cell surface expression of CD4, whereas the expression of CD2, CD3, and WT31 was unchanged. Activation of the autoreactive T-cell clones by cell surface binding anti-CD3 MoAb, as a specific antigen stimulator of the T-cell receptor complex, induced cell surface antigen comodulation of CD3, CD4, and WT31. These data suggest a discrete association of CD3 and CD4 molecules in T-cell stimulation, acting through the autologous mixed lymphocyte reaction and the CD3/T-cell receptor complex. PMA treatment resulted in concomitant down-regulation of CD3 and CD4 but calcium ionophore treatment did not. Thus, it appears that phosphorylation of CD3 leads to the down-regulation of surface antigens of CD4.
journal_name
Scand J Immunoljournal_title
Scandinavian journal of immunologyauthors
Hara M,Kitani A,Harigai M,Suzuki K,Hirose T,Kawakami M,Kawagae M,Nakamura Hdoi
10.1111/j.1365-3083.1991.tb03744.xsubject
Has Abstractpub_date
1991-02-01 00:00:00pages
141-9issue
2eissn
0300-9475issn
1365-3083journal_volume
33pub_type
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journal_title:Scandinavian journal of immunology
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