tokens: The PLC - gamma inhibitor ( U73122 ; 1 . 0 micro M ) , PI3K inhibitor ( LY294002 ; 1 . 0 micro M ) , p38 MAPK inhibitor ( SB203580 ; 1 . 0 micro M ) , and JNK inhibitor ( SP600125 ; 1 . 0 micro M ) significantly blocked the potentiation of NGF - induced neurite outgrowth by SA4503 ( 1 . 0 micro M ) ( Figure 6 ) .