The number of Tomato+ neuroblasts was significantly higher in the striatum on the stroke side after deletion of Rbpj in astrocytes (270 ± 120 cells/section; mean+SD; n = 5) compared with the contralateral uninjured side of the same animals (110 ± 40 cells/section; n = 5; p = 0.041) or with the stroke side from Rbpj+/+ animals (76 ± 64 cells/section; n = 7 p = 0.005). The gene discussed is RBPJ; the disease is Stroke.