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Dynamic ROS Regulation by TIGAR: Balancing Anti-cancer and Pro-metastasis Effects

Sarah-Maria Fendt1, Sophia Y Lunt2

  • 1Laboratory of Cellular Metabolism and Metabolic Regulation, VIB-KU Leuven Center for Cancer Biology, VIB, Herestraat 49, 3000 Leuven, Belgium; Laboratory of Cellular Metabolism and Metabolic Regulation, Department of Oncology, KU Leuven and Leuven Cancer Institute (LKI), Herestraat 49, 3000 Leuven, Belgium.

Cancer Cell
|February 13, 2020
PubMed

Insights

Reactive oxygen species (ROS) have complex roles in cancer. In pancreatic cancer, ROS limitation initially aids tumor growth but hinders metastasis, which is overcome by reduced TIGAR expression.

Area of Science:

  • Oncology
  • Metabolic pathways
  • Cancer research

Background:

  • Reactive oxygen species (ROS) play a dual role in cancer, exhibiting both pro-tumor and anti-tumor effects.
  • The balance of ROS is critical in tumor progression and metastasis.
  • TIGAR (إنجليزية: TIGAR) is a key regulator of ROS levels within cells.

Purpose of the Study:

  • To investigate the complex role of ROS in pancreatic ductal adenocarcinoma (PDAC) development and metastasis.
  • To examine the impact of ROS modulation by TIGAR on cancer progression.
  • To understand the metabolic adaptations of metastasizing cancer cells in response to ROS levels.

Main Methods:

  • Utilized a pancreatic ductal adenocarcinoma (PDAC) mouse model.
  • Manipulated ROS levels through the regulation of TIGAR expression.
  • Analyzed metabolic changes in both primary tumors and metastatic cells.

Main Results:

  • Initial limitation of ROS via TIGAR expression supported early cancer development in the PDAC model.
  • Sustained ROS limitation became a metabolic disadvantage for metastasizing cancer cells.
  • Decreased TIGAR expression was observed as a compensatory mechanism in metastasizing cells to counteract ROS limitation.

Conclusions:

  • The role of ROS in PDAC is context-dependent, influencing both tumor initiation and metastatic potential.
  • TIGAR-mediated ROS regulation presents a potential therapeutic target, with different implications at various stages of cancer progression.
  • Metastatic cancer cells exhibit metabolic plasticity to overcome ROS-related liabilities.

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