C.W. Du, B.G. Wen, D.R. Li, X. Peng, C.Q. Hong, J.Y. Chen, Z.Z. Lin, X. Hong, Y.C. Lin, L.X. Xie, M.Y. Wu and H. Zhang (2006). Arsenic trioxide reduces the invasive and metastatic properties of nasopharyngeal carcinoma cells in vitro. Brazilian Journal of Medical and Bilogical Research, 39: 677-685.

Figure 6. Effect of 3 µM As₂O₃ for 48 h on MMP-9 mRNA expression in HNE1-LMP1 and HNE1 cells. M, DNA markers.A, Untreated HNE1-LMP1 cells. B, As₂O₃-treated HNE1-LMP1 cells. C, Untreated HNE1 cells. D, As₂O₃-treated HNE1 cells. The vertical scale at the left is bp. Experiments were performed on three different occasions with similar results.