Presentation of the same glycolipid by different CD1 molecules

Five CD1 molecules are expressed in humans and it is unclear whether they have specialized or redundant functions. We found that sulfatide is a promiscuous CD1-binding ligand and have isolated T cell clones that are specific for sulfatide and restricted by distinct CD1 molecules. These clones have b...

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Bibliographic Details
Published in:The Journal of experimental medicine 2002-04, Vol.195 (8), p.1013-1021
Main Authors: Shamshiev, A, Gober, H-J, Donda, A, Mazorra, Z, Mori, L, De Libero, G
Format: Article
Language:English
Subjects:
Antigen Presentation - immunology
Antigens, CD1 - genetics
Antigens, CD1 - immunology
CD1 antigen
Cell Line
Glycoproteins - genetics
Glycoproteins - immunology
Humans
Immunophenotyping
sulfatide
Sulfoglycosphingolipids - immunology
T-Lymphocytes - cytology
T-Lymphocytes - immunology
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Summary:Five CD1 molecules are expressed in humans and it is unclear whether they have specialized or redundant functions. We found that sulfatide is a promiscuous CD1-binding ligand and have isolated T cell clones that are specific for sulfatide and restricted by distinct CD1 molecules. These clones have been used to compare the capacity of different CD1 to present the same glycolipid, to induce effector functions, and to form persistent immunogenic complexes. CD1a, CD1b, and CD1c molecules similarly load sulfatide on the cell surface without processing, and prime Th1 and Th2 responses. Stimulation by sulfatide-loaded CD1a persists much longer than that by CD1b and CD1c in living cells. Use of recombinant soluble CD1a confirmed the prolonged capacity to stimulate T cells. Moreover, other glycosphingolipids bind to all CD1, which suggests the presence of additional promiscuous ligands. Thus, group I CD1 molecules present an overlapping set of self-glycolipids, even though they are quite divergent from an evolutionary point of view.
ISSN:0022-1007
1540-9538
DOI:10.1084/jem.20011963