TIMP1 and glioblastoma: Immunoblot-assessed expression of three other proteins known to play important roles in glioblastoma aggressiveness was also 1400W-inhibitable in photostressed U87 cells: (1) downregulation of tissue-inhibitor of metalloproteinase-1 (TIMP-1); (2) upregulation of anti-apoptotic Survivin; and (3) upregulation of pro-metastatic S100A4[56].