Recognition of bacterial glycosphingolipids by natural killer T cells
書誌事項
- 公開日
- 2005-03
- 権利情報
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- http://www.springer.com/tdm
- DOI
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- 10.1038/nature03407
- 公開者
- Springer Science and Business Media LLC
この論文をさがす
説明
Natural killer T (NKT) cells constitute a highly conserved T lymphocyte subpopulation that has the potential to regulate many types of immune responses through the rapid secretion of cytokines. NKT cells recognize glycolipids presented by CD1d, a class I-like antigen-presenting molecule. They have an invariant T-cell antigen receptor (TCR) alpha-chain, but whether this invariant TCR recognizes microbial antigens is still controversial. Here we show that most mouse and human NKT cells recognize glycosphingolipids from Sphingomonas, Gram-negative bacteria that do not contain lipopolysaccharide. NKT cells are activated in vivo after exposure to these bacterial antigens or bacteria, and mice that lack NKT cells have a marked defect in the clearance of Sphingomonas from the liver. These data suggest that NKT cells are T lymphocytes that provide an innate-type immune response to certain microorganisms through recognition by their antigen receptor, and that they might be useful in providing protection from bacteria that cannot be detected by pattern recognition receptors such as Toll-like receptor 4.
収録刊行物
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- Nature
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Nature 434 (7032), 520-525, 2005-03
Springer Science and Business Media LLC
