Glycolipids presented by CD1c and CD1d

Glycolipids presented by CD1c and CD1d are amphiphilic lipid antigens, such as sulfatide and α-galactosylceramide, that bind within the hydrophobic grooves of these MHC-like glycoproteins on antigen-presenting cells like dendritic cells and macrophages. CD1c (group 1) and CD1d (group 2) load these ligands without processing, exposing their hydrophilic head groups for recognition by specific T cells, including invariant NKT cells for CD1d-presented glycolipids. This presentation pathway enables immune responses to both self-glycolipids (e.g., from myelin) and microbial lipids, activating Th1 or Th2 cytokine production to modulate immunity. In disease, dysregulated presentation contributes to autoimmunity (e.g., via sulfatide in myelin-related conditions) and infections, while therapeutic glycolipids like α-GalCer harness CD1d to boost anti-tumor NKT responses. Challenges include ligand promiscuity across CD1 isoforms and rapid T cell anergy, limiting prolonged efficacy.

Other names

Sulfatide-CD1 complexesGlycosphingolipid-CD1 complexesSelf-glycolipids presented by group 1 and group 2 CD1

Binding to CD1c or CD1d grooves to form immunogenic complexes exposed to T cell receptors. Stimulation of NKT cells leading to cytokine secretion (e.g., IFN-γ, IL-4). Displacement of endogenous lipids by exogenous glycolipids.