Figure 3. CD1d-dependent stimulation of a sulfatide-reactive type II NKT cell by self-lysophospholipids.
(A) A type II NKT Hy19.3 or a type I NKT Hy1.2 were stimulated in the presence of APCs (irradiated splenocytes) from either the wild-type C57BL/6 (CD1d+/+) or CD1d-deficient (CD1d−/−) mice in the presence of different concentration of lipids (0.6 – 20 μg/ml). IL-2 release at optimum concentration (5 μg/ml) of indicated lipids is shown. (B) A typical dose titration of Hy19.3 stimulation in the presence of APC and LPC (0.6 – 20 μg/ml) is shown. These data are representative of at least 3 independent experiments.