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• W4303520932 abstract "Previously, we reported, based on an untargeted metabolomics, carnitine derivatives are part of a mechanism to overcome impaired mitochondrial functioning triggered by an acyl-group overflow in CHO cells. In this study, we analyzed the cell-specific rates of 24 selected metabolites using two metrics: correlation coefficients and root-mean-square deviations (RMSDs) between glucose-fed versus glucose/lactic acid-fed cultures. The time-course profiles of acetylcarnitine, adipoylcarnitine, glutarylcarnitine, glutamate, and succinate exhibited significant negative correlations between the two culture conditions. Based on RMSDs, seven carnitine derivatives, 3-hydroxy-methyl-glutarate, mevalonate, pyridoxamine-5-phosphate, succinate, and glycine were substantially different. The analyses from the two metrics reveal a distinctive rearrangement of rates from the following metabolic pathways: (i) high secretion rates of carnitines as part of the acyl-group removal, (ii) low secretion rates of succinate, related to the tricarboxylic acid cycle and the electron-transport chain, (iii) low secretion rates of pyridoxamine-5-phosphate - a co-factor for amino acid catabolism, transaminations, and transsulfuration, and (iv) increases in the consumption rates of glutamate and glycine, both used to produce glutathione. The rewiring in rates observed upon feeding lactic acid is best explained by the activation of pathways supporting homeostasis of acyl-groups and antioxidant synthesis, which are required for continuous proper functioning of oxidative phosphorylation." @default.
• W4303520932 created "2022-10-08" @default.
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• W4303520932 date "2022-11-01" @default.
• W4303520932 modified "2023-09-30" @default.
• W4303520932 title "Metabolic rewiring revealed by cell-specific rate analyses from nontargeted exometabolomics during simultaneous consumption of glucose and lactic acid in a CHO fed-batch process" @default.
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• W4303520932 doi "https://doi.org/10.1016/j.jbiotec.2022.10.004" @default.
• W4303520932 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36216209" @default.
• W4303520932 hasPublicationYear "2022" @default.
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