GFAP and Alzheimer disease: Likewise, the level of GFAP expression per CA1 area (i.e., normalized GFAP intensity) was regulated in the same way (WT vehicle: 1.51 ± 0.13, WT + FTY720: 0.86 ± 0.16, AD vehicle: 2.86 ± 0.47, AD + FTY720: 0.91 ± 0.15; Figure 5C, right).