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Updated: Mar 15, 2026
Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
Published on: December 9, 2015
Metabolic Features of Cancer Treatment Resistance
Andrea Viale1, Giulio F Draetta2,3
1Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA. aviale@mdanderson.org.
Abstract:
A major barrier to achieving durable remission and a definitive cure in oncology patients is the emergence of tumor resistance, a common outcome of different disease types, and independent from the therapeutic approach undertaken. In recent years, subpopulations of slow-cycling cells endowed with enhanced tumorigenic potential and multidrug resistance have been isolated in different tumors, and mounting experimental evidence suggests these resistant cells are responsible for tumor relapse. An in-depth metabolic characterization of resistant tumor stem cells revealed that they rely more on mitochondrial respiration and less on glycolysis than other tumor cells, a finding that challenges the assumption that tumors have a primarily glycolytic metabolism and defective mitochondria. The demonstration of a metabolic program in resistant tumorigenic cells that may be present in the majority of tumors has important therapeutic implications and is a critical consideration as we address the challenge of identifying new vulnerabilities that might be exploited therapeutically.
Insights
Tumor resistance, a barrier to cancer cure, is linked to slow-cycling cells. These cells utilize mitochondrial respiration over glycolysis, offering new therapeutic targets for overcoming cancer relapse.
Area of Science:
- Oncology
- Cancer Biology
- Metabolic Research
Background:
- Tumor resistance is a significant obstacle to achieving durable remission and cures in cancer patients.
- Subpopulations of slow-cycling, drug-resistant tumor cells contribute to cancer relapse.
- These resistant cells exhibit enhanced tumorigenic potential.
Purpose of the Study:
- To investigate the metabolic characteristics of resistant tumor stem cells.
- To challenge the conventional understanding of tumor metabolism.
- To identify potential therapeutic vulnerabilities in resistant cancer cells.
Main Methods:
- In-depth metabolic characterization of resistant tumor stem cells.
- Comparative analysis of metabolic pathways (mitochondrial respiration vs. glycolysis) between resistant and non-resistant tumor cells.
Main Results:
- Resistant tumor stem cells predominantly rely on mitochondrial respiration.
- These cells exhibit reduced reliance on glycolysis compared to other tumor cells.
- This finding contrasts with the common assumption of primarily glycolytic metabolism in tumors.
Conclusions:
- Resistant tumor cells possess a distinct metabolic program.
- This metabolic profile, centered on mitochondrial respiration, presents a potential therapeutic vulnerability.
- Targeting this metabolic pathway could offer new strategies to combat tumor resistance and relapse.
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