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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/21286

Title: Metabolic phenotyping of human blood plasma: a powerful tool to discriminate between cancer types?
Authors: Louis, Evelyne
Adriaensens, Peter
Guedens, Wanda
Vanhove, Karolien
Vandeurzen, Kurt
Darquennes, Karen
Vansteenkiste, Johan
Dooms, Christophe
De Jonge, Eric
Thomeer, Michiel
Mesotten, Liesbet
Issue Date: 2016
Citation: Annals of oncology, 27 (1), p. 178-184
Abstract: Background: Accumulating evidence has shown that cancer cell metabolism differs from that of normal cells. However, up to now it is not clear whether different cancer types are characterized by a specific metabolite profile. Therefore, this study aims to evaluate whether the plasma metabolic phenotype allows to discriminate between lung and breast cancer. Patients and methods: The proton nuclear magnetic resonance spectrum of plasma is divided into 110 integration regions, representing the metabolic phenotype. These integration regions reflect the relative metabolite concentrations and were used to train a classification model in discriminating between 80 female breast cancer patients and 54 female lung cancer patients, all with an adenocarcinoma. The validity of the model was examined by permutation testing and by classifying an independent validation cohort of 60 female breast cancer patients and 81 male lung cancer patients, all with an adenocarcinoma.Results: The model allows to classify 99% of the breast cancer patients and 93% of the lung cancer patients correctly with an area under the curve (AUC) of 0.96 and can be validated in the independent cohort with a sensitivity of 89%, a specificity of 82% and an AUC of 0.94. Decreased levels of sphingomyelin and phosphatidylcholine (phospholipids with choline head group) and phospholipids with short, unsaturated fatty acid chains next to increased levels of phospholipids with long, saturated fatty acid chains seem to indicate that cell membranes of lung tumors are more rigid and less sensitive to lipid peroxidation. The other discriminating metabolites are pointing to a more pronounced response of the body to the Warburg effect for lung cancer. Conclusion: Metabolic phenotyping of plasma allows to discriminate between lung and breast cancer, indicating that the metabolite profile reflects more than a general cancer marker.
URI: http://hdl.handle.net/1942/21286
DOI: 10.1093/annonc/mdv499
ISI #: 000368354600022
ISSN: 0923-7534
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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