Supplementary Figure 6: Accumulation of FTY720-P in various brain regions.

SCID mice were treated daily with FTY720 as described in Fig. 5d. Blood was collected and brain regions were isolated and levels of FTY720 and FTY720-P were measured by LC-ESI-MS/MS. Note: Assuming brain is 75% water, the concentration of FTY720-P in hippocampus for example is ∼9 μM compared to 0.27 μM in blood.