| First Author | Sriram V | Year | 2005 |
| Journal | Eur J Immunol | Volume | 35 |
| Issue | 6 | Pages | 1692-701 |
| PubMed ID | 15915536 | Mgi Jnum | J:99187 |
| Mgi Id | MGI:3581457 | Doi | 10.1002/eji.200526157 |
| Citation | Sriram V, et al. (2005) Cell wall glycosphingolipids of Sphingomonas paucimobilis are CD1d-specific ligands for NKT cells. Eur J Immunol 35(6):1692-1701 |
| abstractText | The current consensus on characterization of NKT cells is based on their reactivity to the synthetic glycolipid, alpha-galactosylceramide (alpha-GalCer) in a CD1d-dependent manner. Because of the limited availability of alpha-GalCer, there is a constant search for CD1d-presented ligands that activate NKT cells. The alpha-anomericity of the carbohydrate is considered to be an important requisite for the CD1d-specific activation of NKT cells. The gram-negative, lipopolysaccharide-free bacterium Sphingomonas paucimobilis is known to contain glycosphingolipids (GSL) with alpha-anomeric sugars attached to the lipid chain. Here, we report that GSL extracted from this bacterium are able to stimulate NKT cells in a CD1d-specific manner. In addition, soluble CD1d-Ig dimers loaded with this lipid extract specifically bind to NKT cells (but not conventional T cells). Further studies on the S. paucimobilis GSL could potentially lead to other natural sources of CD1d-specific ligands useful for NKT cell analyses and aimed at identifying novel therapies for a variety of disease states. |
