Abstract：
:Activation of naive CD8(+) T cells in the presence of interleukin-4 modulates their CD8 co-receptor expression and functional differentiation, resulting in the generation of CD8(low) cells that produce type 2 cytokines and display poor cytolytic and anti-tumour activity. Although this CD8(low) phenotype becomes stable after about a week and can persist with further stimulation in vitro, it is not known whether it can be maintained long term in vivo. Here we report that CD8(low) cells derived from oval-bumin(257-264) -specific T-cell receptor-transgenic CD8(+) T cells activated in the presence of interleukin-4 could be detected in the spleen for at least 4 months after adoptive transfer into normal mice. A significant proportion of the long-term surviving cells retained their CD8(low) phenotype in vivo and after clonal re-activation in vitro. Although long-term surviving CD8(low) cells lacked detectable cytolytic activity or perforin expression, they showed some anti-tumour function in vivo. The persistence of functional cells with a CD8(low) phenotype in vivo raises the possibility that such cells can contribute to effector or regulatory responses to tumours or pathogens.
journal_name
Immunologyjournal_title
Immunologyauthors
Olver S,Apte SH,Baz A,Kelso A,Kienzle Ndoi
10.1111/imm.12068subject
Has Abstractpub_date
2013-06-01 00:00:00pages
187-96issue
2eissn
0019-2805issn
1365-2567journal_volume
139pub_type
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