At day 14 after stroke, the ( +)Env exerted a positive effect on the number of nestin/BrdU cells in the peri-infarcted area of young rats as compared to young rats kept in isolation [F(1,19) = 10.34; **P = 0.005] (Fig. 5A vs C; Fig. 5E). This evidence concerns the gene ERVW-1 and stroke disorder.