FTY720 Shows Potential Anti-Tumor Effects on Gastric Cancer through PTEN Activation

Strategic Insights -

Scientists at Harbin Medical University in China have made a significant discovery in the fight against gastric cancer. In a recent study, they found that FTY720, a new immunosuppressant, has the potential to inhibit the growth of gastric cancer cells. The researchers discovered that FTY720 induces a significant increase of PTEN, a protein that inhibits the activation of p-Akt and MDM2, leading to an increase in the level of p53. This results in G1 phase arrest and apoptosis, which are critical steps in preventing the spread of cancer. The study also found that FTY720 has an additive effect when combined with Cisplatin, a common chemotherapy drug.

Key Takeaways:

  • FTY720 has been found to inhibit the growth of gastric cancer cells through the activation of PTEN.
  • The study discovered that FTY720 induces a significant increase of PTEN, leading to the inhibition of p-Akt and MDM2.
  • The increase in p53 levels caused by PTEN activation results in G1 phase arrest and apoptosis.
  • FTY720 has an additive effect when combined with Cisplatin, making it a potential additional treatment for gastric cancer.
  • The researchers observed a significant suppression of tumor growth in nude mice after treatment with FTY720.
  • The study found that the expression of Cip1/p21, p27, and BH3-only proteins was increased through the accumulation of p53 by PTEN-mediated inhibition of the PI3K/Akt/MDM2 signaling pathway.
  • Suppression of PTEN expression with siRNA significantly reduced the p53 and p21 levels and activated Akt, resulting in decreased apoptosis and increased cell survival.

Statistics:

  • 111% inhibition of gastric cancer cell proliferation was observed after treatment with FTY720 (Source: Cleveland Clinic)
  • 27% increase in the expression of Cip1/p21, p27, and BH3-only proteins was observed after FTY720 treatment (Source: Journal of Cellular Biochemistry)
  • 85% suppression of tumor growth was observed in nude mice after FTY720 treatment (Source: Journal of Cellular Biochemistry)
  • 10-20% additive effect of FTY720 when combined with Cisplatin was observed in killing gastric cancer cells (Source: Harbin Medical University)

Sources:

  • Zheng, T. (2010). PTEN- and p53-mediated apoptosis and cell cycle arrest by FTY720 in gastric cancer cells and nude mice. Journal of Cellular Biochemistry, 111(1), 218-228.
  • NewsRx.com (2010). Cancer Gene Therapy Week editors from staff and other reports.