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Updated: May 29, 2026
Optimization of High Grade Glioma Cell Culture from Surgical Specimens for Use in Clinically Relevant Animal Models and 3D Immunochemistry
Published on: January 7, 2014
Metabolic state of glioma stem cells and nontumorigenic cells
Erina Vlashi1, Chann Lagadec, Laurent Vergnes
1Department of Radiation Oncology, David Geffen School of Medicine at University of California, Los Angeles, Los Angeles, CA 90095, USA.
Abstract:
Gliomas contain a small number of treatment-resistant glioma stem cells (GSCs), and it is thought that tumor regrowth originates from GSCs, thus rendering GSCs an attractive target for novel treatment approaches. Cancer cells rely more on glycolysis than on oxidative phosphorylation for glucose metabolism, a phenomenon used in 2-[(18)F]fluoro-2-deoxy-D-glucose positron emission tomography imaging of solid cancers, and targeting metabolic pathways in cancer cells has become a topic of considerable interest. However, if GSCs are indeed important for tumor control, knowledge of the metabolic state of GSCs is needed. We hypothesized that the metabolism of GSCs differs from that of their progeny. Using a unique imaging system for GSCs, we assessed the oxygen consumption rate, extracellular acidification rate, intracellular ATP levels, glucose uptake, lactate production, PKM1 and PKM2 expression, radiation sensitivity, and cell cycle duration of GSCs and their progeny in a panel of glioma cell lines. We found GSCs and progenitor cells to be less glycolytic than differentiated glioma cells. GSCs consumed less glucose and produced less lactate while maintaining higher ATP levels than their differentiated progeny. Compared with differentiated cells, GSCs were radioresistant, and this correlated with a higher mitochondrial reserve capacity. Glioma cells expressed both isoforms of pyruvate kinase, and inhibition of either glycolysis or oxidative phosphorylation had minimal effect on energy production in GSCs and progenitor cells. We conclude that GSCs rely mainly on oxidative phosphorylation. However, if challenged, they can use additional metabolic pathways. Therefore, targeting glycolysis in glioma may spare GSCs.
Insights
Glioma stem cells (GSCs) are radioresistant and rely on oxidative phosphorylation, unlike differentiated cells. Targeting glycolysis may spare these crucial GSCs, offering new therapeutic avenues.
Area of Science:
- Cancer Metabolism
- Neuro-oncology
- Stem Cell Biology
Background:
- Glioma stem cells (GSCs) are treatment-resistant and drive tumor regrowth, making them a key therapeutic target.
- Cancer cells typically rely on glycolysis, a pathway targeted by imaging and therapies, but GSC metabolism is less understood.
- Understanding GSC metabolism is crucial for developing effective glioma treatments.
Purpose of the Study:
- To investigate the metabolic differences between glioma stem cells (GSCs) and their differentiated progeny.
- To determine the primary metabolic pathways utilized by GSCs and their impact on radioresistance.
Main Methods:
- Utilized a unique imaging system to analyze GSCs and their progeny from glioma cell lines.
- Assessed key metabolic parameters: oxygen consumption rate, extracellular acidification rate, ATP levels, glucose uptake, and lactate production.
- Measured pyruvate kinase isoform expression (PKM1/PKM2), radiation sensitivity, and cell cycle duration.
Main Results:
- GSCs and progenitor cells exhibited lower glycolytic activity compared to differentiated glioma cells.
- GSCs consumed less glucose and produced less lactate, while maintaining higher intracellular ATP levels.
- GSCs demonstrated radioresistance, correlating with a greater mitochondrial reserve capacity.
Conclusions:
- Glioma stem cells primarily rely on oxidative phosphorylation for energy production.
- GSCs possess metabolic flexibility, utilizing additional pathways when challenged.
- Targeting glycolysis in gliomas may spare GSCs, potentially improving treatment outcomes.
