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Cancer cells reprogram metabolism to neutralize alkaline stress from inflammation and iron overload. This metabolic reprogramming, including the Warburg effect, drives cell division for waste removal, suggesting new therapeutic targets.

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Area of Science:

  • Oncology
  • Biochemistry
  • Metabolic Research

Background:

  • Metabolic reprogramming is a hallmark of cancer, observed across many cancer types.
  • The underlying causes of these conserved metabolic changes, such as the Warburg effect, remain largely unknown.

Purpose of the Study:

  • To investigate the biochemical basis and driving forces behind common metabolic reprogrammings in cancer.
  • To propose a unifying model explaining the selection and consequences of these metabolic alterations.

Main Methods:

  • Analysis of biochemical reactions in approximately 50 reprogrammed metabolisms (RMs).
  • Integration of gene expression data for catalyzing enzymes across 7,011 tissues from 14 cancer types.
  • Biochemical and gene expression analysis of RMs, including the Warburg effect, nucleotide synthesis, and sialic acid biosynthesis.

Main Results:

  • All analyzed RMs were found to produce excess protons (H+) compared to normal metabolism.
  • This suggests RMs are induced or selected to counteract intracellular alkaline stress from chronic inflammation and iron overload.
  • Electrically charged byproducts (nucleotides, sialic acids) necessitate continuous cell division for removal.

Conclusions:

  • Cancer metabolic reprogramming serves to neutralize intracellular alkaline stress and facilitate the removal of metabolic byproducts.
  • Continuous cell division and other cancerous behaviors are proposed as mechanisms for timely byproduct clearance.
  • Targeting acidifying metabolic reprogramming represents a potential novel therapeutic strategy for cancer treatment.