Analysis of mammalian cell proliferation and macromolecule synthesis using deuteratedwater and gas chromatography-mass spectrometry

Victoria C. Foletta, Michelle Palmieri, Joachim Kloehn, Shaun Mason, Stephen F. Previs, Malcolm J. McConville, Oliver M. Sieber, Clinton R. Bruce, Greg M. Kowalski

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10 Citations (Scopus)

Abstract

Deuterated water (2H2O), a stable isotopic tracer, provides a convenient and reliable way to label multiple cellular biomass components (macromolecules), thus permitting the calculation of their synthesis rates. Here, we have combined 2H2O labelling, GC-MS analysis and a novel cell fractionation method to extract multiple biomass components (DNA, protein and lipids) from the one biological sample, thus permitting the simultaneous measurement of DNA (cell proliferation), protein and lipid synthesis rates. We have used this approach to characterize the turnover rates and metabolism of a panel of mammalian cells in vitro (muscle C2C12 and colon cancer cell lines). Our data show that in actively-proliferating cells, biomass synthesis rates are strongly linked to the rate of cell division. Furthermore, in both proliferating and non-proliferating cells, it is the lipid pool that undergoes the most rapid turnover when compared to DNA and protein. Finally, our data in human colon cancer cell lines reveal a marked heterogeneity in the reliance on the de novo lipogenic pathway, with the cells being dependent on both ‘self-made’ and exogenously-derived fatty acid.

Original languageEnglish
Article number34
JournalMetabolites
Volume6
Issue number4
DOIs
Publication statusPublished - 1 Dec 2016

Keywords

  • Biomass
  • C2C12
  • Colon cancer
  • Deuterated water
  • DNA synthesis
  • GC-MS
  • Lipogenesis
  • Protein synthesis
  • Stable isotopes

Cite this

Foletta, V. C., Palmieri, M., Kloehn, J., Mason, S., Previs, S. F., McConville, M. J., Sieber, O. M., Bruce, C. R., & Kowalski, G. M. (2016). Analysis of mammalian cell proliferation and macromolecule synthesis using deuteratedwater and gas chromatography-mass spectrometry. Metabolites, 6(4), [34]. https://doi.org/10.3390/metabo6040034