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NOTCH1 functions as an oncogene by regulating the PTEN/PI3K/AKT pathway in clear cell renal cell carcinoma

Shangwen Liu1, Xin Ma, Qing Ai

  • 1Department of Urology, Chinese People's Liberation Army General Hospital, Beijing, P.R. China.

Urologic Oncology
|October 14, 2011
PubMed
Abstract

Insights

NOTCH1 receptor expression is elevated in clear cell renal cell carcinoma (CCRCC). This study shows NOTCH1 regulates PTEN and PI3K/AKT pathway activity, offering potential therapeutic targets for CCRCC.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Signaling

Background:

  • NOTCH1 signaling is crucial for cell fate and development.
  • The role of NOTCH1 in clear cell renal cell carcinoma (CCRCC) pathogenesis remains unclear.
  • Investigating NOTCH1's interaction with the PTEN/PI3K/AKT pathway is essential.

Purpose of the Study:

  • To examine NOTCH1 expression patterns in CCRCC tissues.
  • To elucidate the interaction between NOTCH1 and the PTEN/PI3K/AKT pathway in vitro.
  • To assess the functional impact of NOTCH1 signaling on CCRCC cell behavior.

Main Methods:

  • Western blotting and qRT-PCR were used to analyze NOTCH1, HES1, PTEN, and AKT expression in CCRCC tissues and cell lines.
  • NOTCH1 knockdown and overexpression were performed using siRNA and plasmid transfection.
  • Cell proliferation, apoptosis, invasion, and migration were evaluated using MTS assays, flow cytometry, and transwell assays.

Main Results:

  • NOTCH1 expression was significantly increased in CCRCC tissues compared to non-neoplastic samples.
  • NOTCH1 signaling was constitutively active in CCRCC cell lines.
  • Blocking NOTCH1 attenuated proliferation, invasion, and migration, while up-regulating PTEN and decreasing AKT phosphorylation.

Conclusions:

  • NOTCH1 receptor is upregulated in CCRCC.
  • NOTCH1 regulates PTEN expression and PI3K/AKT pathway activity via HES1.
  • These findings suggest NOTCH1 as a potential therapeutic target for CCRCC.
Keywords:
Clear cell renal cell carcinomaNOTCH1 signalingPI3K/AKT pathwayPTEN

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