title: [Effect of arsenic trioxide on VEGF/R and MMP-2, 9 expressed in K562 cells].
abstract: OBJECTIVE
  To explore the effect of arsenic trioxide (As2 O3) on the level of VEGF, VEGFR and the activity of MMP-2, 9 in K562 cells.
  
  
  METHODS
  The inhibition ratio of K562 cell was detected by MTT assay, the level of VEGF by Enzyme-linked immunosorbent assay (ELISA), the expression ratio of VEGFR by flow cytometry (FCM), and the activity of MMP-2, 9 by gelatin zymography assay.
  
  
  RESULTS
  (1) The IC50 of K562 cells was (2.12 +/- 0.11) micromol/L. Proliferation of K562 cells was significantly inhibited at the concentration of 0.4 - 6.4 micromol/L As2 O3 (P < 0.05). (2) The expression of VEGF was slightly up-regulated by 0.05 micromol/L As2 O3 (P > 0.05) and prominently inhibited by 0.4 micromol/L and 3.2 micromol/L As2 O3 (P < 0.05). As2 O3 had no influence on VEGFR. (3) The activity of MMP-2 and 9 was partly inhibited by 0.05 micromol/L As2 O3 incubated 72 hours and by 0.4, 3.2 micromol/L, As2 O3. With the increase of As2 O3 concentration and the incubation time, the inhibited effect on MMP-2 and 9 was enhanced.
  
  
  CONCLUSIONS
  As2 O3 may down-regulate the expression of VEGF and inhibit the activity of MMP-2 and 9.
authors.affiliation: Clinic Medical College of Yangzhou University, Yangzhou Institute of Hematology, Yangzhou 225001, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jian-Dong
authors.initials: JD
authors.lastname: Zhang
authors.forename: Jian
authors.initials: J
authors.lastname: Gu
authors.forename: Li
authors.initials: L
authors.lastname: Ma
authors.forename: Wei-Gan
authors.initials: WG
authors.lastname: Shen
authors.forename: Xiao-Ling
authors.initials: XL
authors.lastname: Wang
authors.forename: Hong
authors.initials: H
authors.lastname: Chen
mesh_terms: D000077237:Arsenic Trioxide; D001152:Arsenicals / Q000494:pharmacology*; D049109:Cell Proliferation / Q000187:drug effects; D006801:Humans; D020014:K562 Cells; D020778:Matrix Metalloproteinase 2 / Q000378:metabolism*; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism*; D010087:Oxides / Q000494:pharmacology*; D040262:Receptors, Vascular Endothelial Growth Factor / Q000378:metabolism*; D042461:Vascular Endothelial Growth Factor A / Q000378:metabolism*
chemical_list: D001152:Arsenicals; D010087:Oxides; D042461:Vascular Endothelial Growth Factor A; D040262:Receptors, Vascular Endothelial Growth Factor; C522361:MMP2 protein, human; D020778:Matrix Metalloproteinase 2; D020780:Matrix Metalloproteinase 9; D000077237:Arsenic Trioxide