Figure 3.
Blocking the formation of CD300b complexes enhances receptor signaling. (A) RBL-2H3 cells were stably transfected with HA-CD300b wt or HA-CD300b E28A-Q29G. RBL-2H3 transfectants were transiently transfected with 3 × NFAT/AP1-Luciferase and TK-Renilla reporter plasmids. Luciferase activity was measured after stimulation for 7 h with the indicated antibodies. Data were normalized and expressed as a percentage of luciferase activity considering IgE stimulation as the top threshold of activation. Duplicates were performed for all stimulations. The result is a mean ± SD of three independent experiments. Group differences were investigated by unpaired, two-tail Student’s t test. p values are indicated for statistically different means: ** ≤ 0.01.