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Mapping metabolic oscillations during cell cycle progression.

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Area of Science:

  • Cellular Biology
  • Metabolomics
  • Biochemistry

Background:

  • Cell proliferation requires coordinated macromolecule synthesis and cell cycle progression.
  • The precise relationship between cell cycle phases and metabolic regulation remains largely undefined.

Purpose of the Study:

  • To identify metabolic processes that oscillate throughout the cell cycle.
  • To investigate metabolic remodeling during cell cycle progression.

Main Methods:

  • Utilized comprehensive, non-targeted liquid chromatography-high resolution mass spectrometry (LC-HRMS) based metabolomics.
  • Analyzed HeLa cells specifically isolated in the G1 and SG2M cell cycle phases.
  • Quantified thousands of diverse metabolite ions to assess metabolic changes.

Main Results:

  • 18% of observed metabolite peaks showed at least twofold differences between cell cycle phases after accounting for cell growth.
  • While most amino acids, phospholipids, and ribonucleotides remained constant, specific metabolites like phosphorylated ribonucleotides (SG2M) and phosphatidylinositols (G1) oscillated.
  • Pentose phosphates, methylglyoxal metabolites, and hundreds of uncharacterized metabolites also exhibited cell cycle-dependent oscillations.

Conclusions:

  • Metabolic remodeling is a significant feature of cell cycle progression.
  • Specific metabolic pathways, including those involving ribonucleotides, lipids, and carbohydrates, are dynamically regulated across the cell cycle.
  • Oscillating uncharacterized metabolites suggest novel metabolic activities synchronized with cell division, offering avenues for future research.