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Transcription factor CUTL1 is a negative regulator of drug resistance in gastric cancer

Tingting Li1, Honghong Wang, Yimin Sun

  • 1Xijing Hospital of Digestive Diseases, State Key Laboratory of Cancer Biology, Fourth Military Medical University, Xi'an 710032, China.

The Journal of Biological Chemistry
|December 21, 2012
PubMed

Insights

CUTL1 activity is inversely linked to gastric cancer drug resistance. Enhancing CUTL1 boosts chemotherapy effectiveness and apoptosis, offering a potential therapeutic target for overcoming multidrug resistance.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Gastric cancer is a major cause of cancer mortality globally.
  • Chemotherapy resistance significantly limits treatment efficacy for gastric cancer patients.
  • Understanding the molecular basis of drug resistance is crucial for improving patient outcomes.

Purpose of the Study:

  • To investigate the role of CUTL1 (also known as Chromatin Unbinding Trial 1) in modulating gastric cancer cell response to chemotherapeutic agents.
  • To determine if CUTL1 activity can serve as a biomarker for drug resistance and prognosis in gastric cancer.

Main Methods:

  • Established doxorubicin-sensitive (SGC7901) and -resistant (SGC7901/ADR) gastric cancer cell lines.
  • Utilized gain-of-function (CUTL1 overexpression) and loss-of-function (CUTL1 knockdown) approaches.
  • Assessed drug sensitivity, apoptosis levels, and tumor response in vitro and in vivo (mouse models).

Main Results:

  • CUTL1 transcription activity was significantly reduced in doxorubicin-resistant gastric cancer cells.
  • Decreased CUTL1 expression correlated with intrinsic drug resistance and predicted poor prognosis in human gastric cancer tissues.
  • Increased CUTL1 activity enhanced sensitivity to multiple chemotherapeutic drugs and promoted apoptosis.
  • Conversely, reduced CUTL1 expression conferred significant drug resistance.
  • In vivo studies confirmed that CUTL1 overexpression improved chemotherapy response and inhibited tumor growth, while knockdown induced resistance.

Conclusions:

  • CUTL1 activity is inversely associated with multidrug resistance in gastric cancer.
  • Modulating CUTL1 activity represents a promising therapeutic strategy to overcome chemotherapy resistance.
  • CUTL1 serves as a potential predictive biomarker for treatment response and patient prognosis in gastric cancer.

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