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Critical role of AMPK in redox regulation under glucose starvation

Yi Ren1, Han-Ming Shen1

  • 1Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 117593, Singapore.

Redox Biology
|March 12, 2019
PubMed

Insights

Glucose starvation causes oxidative stress in cancer cells. Targeting the LKB1-AMPK pathway offers a promising strategy for novel cancer therapeutics by manipulating metabolic and oxidative stress.

Area of Science:

  • Oncology
  • Molecular Biology
  • Metabolic Pathways

Background:

  • Glucose starvation is a significant metabolic stressor for cancer cells.
  • This deprivation disrupts glycolysis and the pentose phosphate pathway, leading to oxidative stress, reactive oxygen species (ROS) production, and impaired antioxidant systems.
  • This results in redox imbalance and cell death.

Purpose of the Study:

  • To investigate the role of 5' AMP-activated protein kinase (AMPK) in maintaining redox homeostasis and cell survival under glucose starvation.
  • To explore the LKB1-AMPK pathway's function in cancer metabolism and oxidative stress.
  • To identify novel therapeutic targets by understanding the interplay between ROS and glucose metabolism.

Main Methods:

  • Analysis of cellular responses to glucose starvation.
  • Investigation of AMPK activation and its downstream effects.
  • Examination of the LKB1-AMPK pathway's role in redox balance and cell survival.

Main Results:

  • AMPK plays a critical role in maintaining redox homeostasis and cell survival during glucose starvation through various pathways, including fatty acid metabolism and antioxidant responses.
  • The study highlights the convergence of ROS and glucose metabolism pathways.
  • Emerging evidence suggests a pro-tumor survival role for the LKB1-AMPK pathway, challenging its traditional tumor suppressor function.

Conclusions:

  • Targeting metabolic and oxidative stress in cancer cells is a promising therapeutic strategy.
  • Manipulation of AMPK activity presents a novel approach for developing cancer therapeutic agents.
  • Understanding the dual role of the LKB1-AMPK pathway is crucial for effective cancer treatment development.
Keywords:
AMPKCancerFatty acid metabolismGlucose metabolismReactive oxygen species

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