H-Ras increases urokinase expression and cell invasion in genetically modified human astrocytes through Ras/Raf/MEK signaling pathway. - Zhao Y; Xiao A; Dipierro CG; Abdel-Fattah R; Amos S; Redpath GT; Carpenter JE; Pieper RO; Hussaini IM (Glia, 2008)