Abstract
In this study we report on the optimisation of the technologies for generation of a global metabolomics profile for intracellular metabolites in Chinese hamster ovary (CHO) cells. We evaluated the effectiveness of a range of different extraction methods applied to CHO cells which had been quenched using a previously optimised approach. The extraction methods tested included cold methanol, hot ethanol, acid, alkali and methanol/chloroform plus combinations of these. The extraction of metabolites using two 100% methanol extractions followed by a final water extraction recovered the largest range of metabolites. For the majority of metabolites, extracts generated in this manner exhibited the greatest recovery with high reproducibility. Therefore, this was the best extraction method for attaining a global metabolic profile from a single sample. However, another parallel extraction method (e.g. alkali) may also be required to maximise the range of metabolites recovered (e.g. non-polar metabolites).
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Abbreviations
- CHO:
-
Chinese hamster ovary
- AMBIC:
-
Ammonium bicarbonate
- PCA:
-
Perchloric acid
- GC-MS:
-
Gas chromatography-mass spectrometry
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Acknowledgements
We gratefully acknowledge the financial support from the UK BBSRC, EPSRC and industrial members of the Bioprocessing Research Industry Club (BRIC) and from a BBSRC Research Development Fellowship to GMS. We would like to thank William Allwood for helpful discussions.
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Sellick, C.A., Knight, D., Croxford, A.S. et al. Evaluation of extraction processes for intracellular metabolite profiling of mammalian cells: matching extraction approaches to cell type and metabolite targets. Metabolomics 6, 427–438 (2010). https://doi.org/10.1007/s11306-010-0216-9
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DOI: https://doi.org/10.1007/s11306-010-0216-9