Composite proteomic and metabolomic plasma biomarkers for detection of colorectal, lung and ovarian cancers
Akerren Ögren, J.; Ekström, J.; Rameika, N.; Torell, E.; Larsson, C.; Enblad, G.; Stoimenov, I.; Micke, P.; Gyllensten, U.; Hellström, M.; Glimelius, B.; Stalberg, K.; Sjöblom, T.
Show abstract
Sensitive and specific blood biomarkers for detection of cancer are highly warranted. To discover such biomarkers, we measured plasma levels of 165 proteins and 244 metabolites in 818 patients with colorectal, lung or ovarian carcinoma at diagnosis, 119 patients with non-malignant conditions of the corresponding organs, and 1,129 healthy individuals. We performed exhaustive search over all cut-off values of the ROC statistic and identified composite biomarkers with diagnostic performance significantly superior to benchmark FDA approved blood tests in clinical use for detection of cancer. We found biomarkers composed of 2-4 proteins separating cases of each tumor type from healthy controls with ROC AUC in the range 0.89 to 0.98. These biomarkers also separated cases of each tumor type from the other two (ROC AUC 0.82-0.88). For lung and ovarian cancers, we identified biomarkers distinguishing cases with intermediate and high from those with low tumor stages. These biomarkers for cancer detection and stage can find use in early detection, staging and differential diagnosis of common tumor types.
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