Abstract:
:CD8(+) natural killer T (NKT) cells from EBV-associated tumour patients are quantitatively and functionally impaired. EBV-induced CD8(+) NKT cells drive syngeneic T cells into a Th1-bias response to suppress EBV-associated malignancies. IL-4-biased CD4(+) NKT cells do not affect either syngeneic T cell cytotoxicity or Th cytokine secretion. Circulating mDC1 cells from patients with EBV-associated malignancies impair the production of IFN-gamma by CD8(+) NKT cells. In this study, we have established a human-thymus-SCID chimaera model to further investigate the underlying mechanism of EBV-induced CD8(+) NKT cells in suppressing EBV-associated malignancies. In the human-thymus-SCID chimera, EBV-induced CD8(+) NKT cells suppress EBV-associated malignancies in a manner dependent on the Th1-bias response and syngeneic CD3(+) T cells. However, adoptive transfer with CD4(+) NKT cells alone inhibits T cell immunity. Interestingly, CD4(+) NKT cells themselves secrete high levels of IL-2, enhancing the persistence of adoptively transferred CD8(+) NKT cells and T cells, thereby leading to a more pronounced T cell anti-tumour response in chimaeras co-transferred with CD4(+) and CD8(+) NKT cells. Thus, immune reconstitution with EBV-induced CD4(+) and CD8(+) NKT cells synergistically enhances T cell tumour immunity, providing a potential prophylactic and therapeutic treatment for EBV-associated malignancies.
journal_name
Cell Mol Immunoljournal_title
Cellular & molecular immunologyauthors
Xiao W,Li L,Zhou R,Xiao R,Wang Y,Ji X,Wu M,Wang L,Huang W,Zheng X,Tan X,Chen L,Xiong T,Xiong J,Jin Y,Tan J,He Ydoi
10.1038/cmi.2009.48subject
Has Abstractpub_date
2009-10-01 00:00:00pages
367-79issue
5eissn
1672-7681issn
2042-0226journal_volume
6pub_type
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