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Notch pathway activation is associated with pancreatic cancer treatment failure

Jin Young Lee1, Si Young Song2, Jeong Youp Park1

  • 1Division of Gastroenterology, Department of Internal Medicine, Institute of Gastroenterology, College of Medicine Yonsei University, South Korea.

Pancreatology : Official Journal of the International Association of Pancreatology (IAP) ... [Et Al.]
|February 22, 2014
PubMed
Abstract

Insights

Pancreatic cancer treatment failure may stem from increased cancer stem cells (CSCs) and activated Notch pathway. Targeting the Notch pathway could offer a strategy to overcome treatment resistance in pancreatic cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Stem Cell Research

Background:

  • Pancreatic cancer exhibits resistance to conventional therapies.
  • Treatment failure in pancreatic cancer is hypothesized to be linked to changes in cancer stem cells (CSCs) and developmental pathways post-treatment.

Purpose of the Study:

  • To investigate the role of cancer stem cells (CSCs) and the Notch pathway in pancreatic cancer treatment failure.
  • To determine if gemcitabine treatment affects CSC populations and Notch pathway activation.
  • To evaluate the therapeutic potential of targeting the Notch pathway.

Main Methods:

  • Analysis of pancreatic cancer cell lines (BxPC3, HPAC) post-gemcitabine treatment using flow cytometry (FACS) for CSC markers (CD24, CD44) and western blot for Notch pathway components (Notch1, Hes1, β-catenin, pAKT).
  • Investigation of the effects of DAPT (gamma-secretase inhibitor) on treated cell lines.
  • Correlation analysis of Hes1 expression with patient survival data via immunohistochemistry.

Main Results:

  • Gemcitabine treatment increased the proportion of CD24(+)CD44(+) CSCs, which exhibited enhanced migration and invasion capabilities.
  • Increased expression of Notch1 and Hes1 was observed in gemcitabine-treated cells.
  • Strong Hes1 expression in patients correlated with shorter overall survival (11.1 vs. 21.6 months).
  • DAPT treatment reversed CSC increase, inhibited Notch pathway activation, and reduced cell migration and invasion.

Conclusions:

  • Elevated CSCs and activated Notch signaling contribute to treatment failure in pancreatic cancer.
  • The Notch pathway presents a potential therapeutic target for overcoming treatment resistance in pancreatic cancer.
Keywords:
Cancer stem cellNotchPancreatic cancer

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