PPP1R9B and viral infectious disease: Moreover, we exposed the LV-CREB133-GFP- or LV-GFP-infected or vehicle-treated hippocampal neurons to 8-OH-DPAT (10−5 M) for 48 h (starting at d 8 after virus infection) and found that LV-CREB133-GFP blocked 8-OH-DPAT-induced increases in expressions of spinophilin (F(3,16) = 15.77, P = 0.003) and synapsin (F(3,8) = 26.69; P = 0.005) (Fig. 2D).