Effect of 2,3,7,8-tetrachlorodibenzo-p-dioxin on growth factor expression in the human breast cancer cell line MCF-7

Arch Toxicol. 1995;69(4):259-65. doi: 10.1007/s002040050168.


The aim of this study was to examine whether changes in growth factor or cytokine expression could be responsible for the growth inhibitory effect of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) on the human breast cancer MCF-7 cell line. Treatment of MCF-7 cells with 10 nM TCDD for 7 days reduced the cell growth to 60% of control; this effect was partly abolished by cotreatment of the cells with 100 nM 17 beta-estradiol (E2). The inhibition of cell growth by TCDD was accompanied by an enhanced secretion of transforming growth factor-beta (TGF-beta) and the TGF-beta content in cell culture supernatants was 2-fold higher than in controls. Using reverse transcription polymerase chain reaction (RT-PCR), the effect of TCDD on the expression of TGF-beta isoforms, transforming growth factor-alpha (TGF-alpha), tumor necrosis factor-alpha (TNF-alpha) and interleukin-1 beta (IL-1 beta) was investigated. It was demonstrated that incubation with 1, 10 and 100 nM TCDD for 24 h increased mRNA levels of TGF-alpha, TNF-alpha and IL-1 beta. The strongest effect was found on IL-1 beta, the mRNA level of which was dose-dependently increased. TCDD had a minor effect on TGF-alpha and TNF-alpha mRNA. The mRNA levels were significantly increased after treatment with 10 and 100 nM TCDD. The mRNA expression of TGF-beta 1 and TGF-beta 2 was unchanged, whereas the TGF-beta 3 mRNA level was enhanced 2 to 3-fold after TCDD treatment. From the results, we suggest that TCDD-induced growth inhibition in MCF-7 cells is related to the growth inhibitory action of a set of growth factors and cytokines which have a contextual action on MCF-7 cell proliferation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Analysis of Variance
  • Breast Neoplasms / physiopathology*
  • Cytokines / biosynthesis*
  • Cytokines / drug effects
  • Growth Substances / biosynthesis*
  • Humans
  • Interleukin-1 / biosynthesis
  • Lung Neoplasms / physiopathology
  • Polychlorinated Dibenzodioxins / pharmacology*
  • Polymerase Chain Reaction
  • Transforming Growth Factor alpha / biosynthesis
  • Transforming Growth Factor beta / biosynthesis
  • Tumor Cells, Cultured
  • Tumor Necrosis Factor-alpha / biosynthesis


  • Cytokines
  • Growth Substances
  • Interleukin-1
  • Polychlorinated Dibenzodioxins
  • Transforming Growth Factor alpha
  • Transforming Growth Factor beta
  • Tumor Necrosis Factor-alpha