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Growth suppression activity of the PTEN tumor suppressor gene in human endometrial cancer cells

J F Lilja1, D Wu, R K Reynolds

  • 1Department of Obstetrics and Gynecology, The University of Michigan Comprehensive Cancer Center, Ann Arbor 48109, USA.

Anticancer Research
|August 11, 2001
PubMed

Insights

Phosphatase and tensin homolog (PTEN) activation suppresses endometrial cancer cell growth. PTEN may serve as a novel therapeutic agent for treating this malignancy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Constitutive activation of AKT proteins is implicated in human carcinogenesis.
  • AKT activation is frequently observed in endometrial cancers.
  • PTEN, a negative regulator of AKT, is frequently mutated in endometrial cancer.

Purpose of the Study:

  • To investigate AKT activation in human endometrial cancer cell lines and tumor samples.
  • To evaluate the tumor-suppressive role of PTEN in endometrial cancer.
  • To explore the potential of PTEN as a therapeutic agent for endometrial cancer.

Main Methods:

  • Analysis of AKT phosphorylation levels in endometrial cancer cell lines and tumor samples.
  • Assessment of PTEN expression and its impact on endometrial cancer cell growth.
  • Evaluation of PTEN's effect on malignant transformation induced by ras and c-myc oncogenes in rat embryo fibroblasts.

Main Results:

  • Elevated levels of phosphorylated AKT were detected in Ishikawa (ISK) and RL-95 endometrial cancer cell lines and tumor samples.
  • PTEN expression significantly inhibited the growth of ISK and KLE endometrial cancer cell lines.
  • PTEN suppressed malignant transformation mediated by ras and c-myc oncogenes in primary rat embryo fibroblasts.

Conclusions:

  • PTEN activation is associated with suppressed growth in endometrial cancer cells.
  • PTEN demonstrates potent anti-cancer activity against endometrial cancer cell lines.
  • PTEN holds promise as a potential therapeutic strategy for endometrial cancer.

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