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Distinct Functional Lineages of Human Vα24 Natural Killer T Cells
Open accessAbstract
CD1d-restricted autoreactive natural killer (NK)T cells have been reported to regulate a range of disease conditions, including type I diabetes and immune rejection of cancer, through the secretion of either T helper (Th)2 or Th1 cytokines. However, mechanisms underlying Th2 versus Th1 cytokine secretion by these cells are not well understood. Since most healthy subjects express <1 NKT cell per 1,000 peripheral blood lymphocytes (PBLs), we devised a new method based on the combined used of T cell receptor (TCR)-specific reagents α-galactosylceramide (αGalCer) loaded CD1d-tetramers and anti-Vα24 monoclonal antibody, to specifically identify and characterize these rare cells in fresh PBLs. We report here that CD4+ and CD4−CD8− (double negative [DN]) NKT cell subsets represent functionally distinct lineages with marked differences in their profile of cytokine secretion and pattern of expression of chemokine receptors, integrins, and NK receptors. CD4+ NKT cells were the exclusive producers of interleukin (IL)-4 and IL-13 upon primary stimulation, whereas DN NKT cells had a strict Th1 profile and prominently expressed several NK lineage receptors. These findings may explain how NKT cells could promote Th2 responses in some conditions and Th1 in others, and should be taken into consideration for intervention in relevant diseases.
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Metadata
- Authors
- Lee, P. T., Benlagha, K., Teyton, L., & Bendelac, A.
- Venue
- The Journal of Experimental Medicine
- Publisher
- Rockefeller University Press
- Published
- 2002-03-04
- Volume
- 195
- Issue
- 5
- Pages
- 637-641
- ISSN
- 0022-1007 (ISSN-L)
- 1540-9538
- OpenAlex
- W2065709904
- Cited by
- 591
- References
- 0
- FWCI
- 11.07
- Type
- journal article
- Language
- en
- Open access
- bronze
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