
Circular RNAs (circRNAs) have emerged as central regulators of tumor metabolic reprogramming, a fundamental hallmark of cancer progression. These stable, covalently closed RNA molecules orchestrate key metabolic pathways, including aerobic glycolysis, lipid synthesis, glutaminolysis, and mitochondrial dynamics, through diverse mechanisms such as miRNA sponging, protein interaction, and even peptide translation. By fine-tuning the expression and activity of metabolic enzymes and transporters, circRNAs fuel tumor growth, drive drug resistance, and shape the immunosuppressive tumor microenvironment. Their inherent stability and disease-specific expression also position them as promising diagnostic biomarkers and novel therapeutic targets. This review systematically deciphers the multifaceted roles of circRNAs in metabolic rewiring and evaluates their clinical translational potential, bridging molecular insights with emerging therapeutic strategies.
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