Non-targeted metabolomics identifies erythronate accumulation in cancer cells
Zhang, J.; Keibler, M. A.; Dong, W.; Ghelfi, J.; Cordes, T.; Kanashova, T.; Pailot, A.; Linster, C.; Dittmar, G.; Metallo, C. M.; Lautenschlaeger, T.; Hiller, K.; Stephanopoulos, G.
Show abstract
Using a non-targeted isotope-assisted metabolomics approach, we identified erythronate as a metabolite that accumulates in several human cancer cell lines. Erythronate has been reported to be a detoxification product derived from off-target glycolytic metabolism. We provide data supporting a possible alternative route to erythronate production involving the dephosphorylation of the pentose phosphate pathway intermediate erythrose-4-phosphate to form erythrose, followed by the oxidation of erythrose by an aldehyde dehydrogenase. Finally, we detected increased erythronate concentrations in tumors relative to adjacent normal tissues from lung cancer patients. These findings suggest the accumulation of erythronate to be an example of metabolic reprogramming in cancer cells, raising the possibility that elevated level of erythronate may serve as a biomarker of certain types of cancer.
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