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• W2013538198 abstract "Abstract In order to define the role of As 2 O 3 in regulating the tumor cell invasiveness, the effects of As 2 O 3 on secretion of matrix metalloproteinases (MMPs) and urokinase plasminogen activator (uPA), and in vitro invasion of HT1080 human fibrosarcoma cells were examined. As 2 O 3 inhibited cell adhesion to the collagen matrix in a concentration dependent manner, whereas the same treatment enhanced cell to cell interaction. In addition, As 2 O 3 inhibited migration and invasion of HT1080 cells stimulated with phorbol 12‐myristate 13‐aceate (PMA), and suppressed the expression of MMP‐2, ‐9, membrane type‐1 MMP, uPA, and uPA receptor (uPAR). In contrast, As 2 O 3 increased the expression of tissue inhibitor of metalloproteinase (TIMP)‐1 and PA inhibitor (PAI)‐1, and reduced the MMP‐2, ‐9, and uPA promoter activity in the presence and absence of PMA. Furthermore, the promoter stimulating and DNA binding activity of nuclear factor‐κB (NF‐κB) was blocked by As 2 O 3 , whereas the activator protein‐1 activity was unchanged. Pretreatment of the cells with N ‐acetyl‐ L ‐cysteine (NAC) significantly prevented suppression of MMPs and uPA secretion, DNA binding activity of NF‐κB, and in vitro invasion of HT1080 cells by As 2 O 3 , suggesting a role of reactive oxygen species (ROS) in this process. These results suggest that As 2 O 3 inhibits tumor cell invasion by modulating the MMPs/TIMPs and uPA/uPAR/PAI systems of extracellular matrix (ECM) degradation. In addition, the generation of ROS and subsequent suppression of NF‐κB activity by As 2 O 3 might partly be responsible for the phenomena. Overall, As 2 O 3 shows potent activity controlling tumor cell invasiveness in vitro. © 2005 Wiley‐Liss, Inc." @default.
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• W2013538198 date "2005-06-16" @default.
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• W2013538198 title "Arsenic trioxide (As2O3) inhibits invasion of HT1080 human fibrosarcoma cells: Role of nuclear factor-κB and reactive oxygen species" @default.
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• W2013538198 doi "https://doi.org/10.1002/jcb.20452" @default.
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