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Gene Regulation and Targeted Therapy in Gastric Cancer Peritoneal Metastasis: Radiological Findings from Dual Energy CT and PET/CT
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Activated mammalian target of rapamycin is a potential therapeutic target in gastric cancer

Da-zhi Xu1, Qi-rong Geng, Ying Tian

  • 1State Key Laboratory of Oncology in South China, Guangzhou 510060, China.

BMC Cancer
|October 9, 2010
PubMed
Abstract

Insights

Activated mTOR (p-mTOR) is prevalent in gastric cancer and linked to poorer survival. RAD001 effectively inhibits tumor cell growth by targeting the mTOR pathway, suggesting its therapeutic potential.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • The mammalian target of rapamycin (mTOR) pathway is crucial for cellular growth and homeostasis.
  • Dysregulation of mTOR signaling is implicated in various cancers, including gastric cancer.

Purpose of the Study:

  • To investigate the expression and prognostic significance of activated mTOR (p-mTOR) in gastric cancer.
  • To evaluate the therapeutic potential of RAD001, an mTOR inhibitor, in gastric cancer models.

Main Methods:

  • Immunohistochemistry was used to assess p-mTOR expression in 181 gastric cancer specimens.
  • Correlation analysis was performed between p-mTOR expression and clinicopathological features/survival.
  • The effect of RAD001 on gastric cancer cell lines (BGC823, AGS) was determined in vitro.

Main Results:

  • p-mTOR expression was detected in 51.4% of gastric cancers and correlated with lymph node status and pTNM stage.
  • Positive p-mTOR expression was associated with significantly shorter disease-free survival (DFS) and overall survival (OS).
  • RAD001 dose-dependently inhibited gastric cancer cell proliferation, down-regulating key proteins (p70s6k, p-p70s6k, C-myc, CyclinD1, Bcl-2) and up-regulating P53.

Conclusions:

  • Activated mTOR (p-mTOR) is a potential therapeutic target in gastric cancer.
  • RAD001 demonstrates promise as a treatment agent by inducing cell cycle arrest and apoptosis.
  • Targeted inhibition of mTOR may represent a viable therapeutic strategy for gastric cancer.

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