Unraveling and targeting RAS-driven metabolic signaling for therapeutic gain
Jonathan M DeLiberty1, Ryan Robb1, Claire E Gates1
1Department of Pharmacology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.
Abstract:
RAS mutations are among the most frequent oncogenic drivers observed in human cancers. With a lack of available treatment options, RAS-mutant cancers account for many of the deadliest cancers in the United States. Recent studies established that altered metabolic requirements are a hallmark of cancer, and many of these alterations are driven by aberrant RAS signaling. Specifically, RAS-driven cancers are characterized by upregulated glycolysis, the differential channeling of glycolytic intermediates, upregulated nutrient scavenging pathways such as autophagy and macropinocytosis, and altered glutamine utilization and mitochondrial function. This unique metabolic landscape promotes tumorigenesis, proliferation, survival in nutrient deficient environments and confers resistance to conventional cytotoxic and targeted therapies. Emerging work demonstrates how these dependencies can be therapeutically exploited in vitro and in vivo with many metabolic inhibitors currently in clinical trials. This review aims to outline the unique metabolic requirements induced by aberrant RAS signaling and how these altered dependencies present opportunities for therapeutic intervention.
Insights
RAS mutations drive many deadly cancers by altering cell metabolism. Targeting these metabolic changes, including upregulated glycolysis and nutrient scavenging, offers new therapeutic strategies for RAS-mutant cancers.
Area of Science:
- Oncology
- Cancer Metabolism
- Molecular Biology
Background:
- RAS mutations are frequent oncogenic drivers in human cancers, leading to limited treatment options and high mortality rates.
- Aberrant RAS signaling significantly alters cancer cell metabolism, a known hallmark of cancer.
- RAS-driven cancers exhibit specific metabolic alterations, including increased glycolysis, altered nutrient scavenging (autophagy, macropinocytosis), and modified glutamine metabolism.
Purpose of the Study:
- To review the unique metabolic requirements induced by aberrant RAS signaling in cancer.
- To identify how these altered metabolic dependencies can be therapeutically exploited.
Main Methods:
- Literature review of studies on RAS mutations and cancer metabolism.
- Analysis of metabolic pathways upregulated in RAS-driven cancers.
- Examination of therapeutic strategies targeting metabolic vulnerabilities.
Main Results:
- RAS-driven cancers display a distinct metabolic profile characterized by upregulated glycolysis and nutrient scavenging.
- These metabolic alterations are crucial for tumorigenesis, proliferation, and survival in nutrient-poor conditions.
- The unique metabolic landscape also confers resistance to standard cancer therapies.
Conclusions:
- Aberrant RAS signaling creates specific metabolic dependencies in cancer cells.
- Targeting these metabolic vulnerabilities, particularly with metabolic inhibitors, presents a promising therapeutic avenue.
- Metabolic inhibitors are currently in clinical trials for RAS-mutant cancers, highlighting their therapeutic potential.
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