Abstract
Introduction
Metabolomics is an emerging approach for early detection of cancer. Along with the development of metabolomics, high-throughput technologies and statistical learning, the integration of multiple biomarkers has significantly improved clinical diagnosis and management for patients.
Objectives
In this study, we conducted a systematic review to examine recent advancements in the oncometabolomics-based diagnostic biomarker discovery and validation in pancreatic cancer.
Methods
PubMed, Scopus, and Web of Science were searched for relevant studies published before September 2017. We examined the study designs, the metabolomics approaches, and the reporting methodological quality following PRISMA statement.
Results and Conclusion
The included 25 studies primarily focused on the identification rather than the validation of predictive capacity of potential biomarkers. The sample size ranged from 10 to 8760. External validation of the biomarker panels was observed in nine studies. The diagnostic area under the curve ranged from 0.68 to 1.00 (sensitivity: 0.43–1.00, specificity: 0.73–1.00). The effects of patients’ bio-parameters on metabolome alterations in a context-dependent manner have not been thoroughly elucidated. The most reported candidates were glutamic acid and histidine in seven studies, and glutamine and isoleucine in five studies, leading to the predominant enrichment of amino acid-related pathways. Notably, 46 metabolites were estimated in at least two studies. Specific challenges and potential pitfalls to provide better insights into future research directions were thoroughly discussed. Our investigation suggests that metabolomics is a robust approach that will improve the diagnostic assessment of pancreatic cancer. Further studies are warranted to validate their validity in multi-clinical settings.
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Abbreviations
- AUC:
-
Area under the curve
- BCAAs:
-
Branched-chain amino acids
- CP:
-
Chronic pancreatitis
- GC–MS:
-
Gas chromatography–mass spectrometry
- LC–MS:
-
Liquid chromatography–mass spectrometry
- MRI:
-
Magnetic resonance imaging
- MS/MS:
-
Tandem mass spectrometry
- NMR:
-
Nuclear magnetic resonance
- OPLS-DA:
-
Orthogonal projections to latent structures discriminant analysis
- PC:
-
Pancreatic cancer
- PCA:
-
Principal component analysis
- PDAC:
-
Pancreatic ductal adenocarcinoma
- PLS-DA:
-
Partial least squares discriminant analysis
- PLS-DF:
-
Partial least squares discriminant function
- Q2 :
-
Cross-validated coefficient of determination
- R2 :
-
Coefficient of determination
- ROC:
-
Receiver operating characteristic curve
- SFE-SFC/MS/MS:
-
Supercritical fluid extraction-supercritical fluid chromatography coupled with tandem mass spectrometry
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The Bio-Synergy Research Project of the Ministry of Science, ICT and Future Planning through the National Research Foundation of Korea (NRF-2012M3A9C4048796), the National Research Foundation of Korea (NRF-2017R1E1A2A02022658, NRF-2018R1A5A2024425), and the BK21 Plus Program in 2017.
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SWK and SSH supervised the project. SWK, SSH, and NPL contributed to the study design. NPL, SJY, NHA, TDN, DKL, and YJH searched and collected the data. NPL, SJY, NHA, TDN, DKL, and YJH performed data processing and interpretation. NPL, SJY, NHA, and TDN prepared the first draft of the manuscript. All authors have read, revised critically, and approved the final manuscript.
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Long, N.P., Yoon, S.J., Anh, N.H. et al. A systematic review on metabolomics-based diagnostic biomarker discovery and validation in pancreatic cancer. Metabolomics 14, 109 (2018). https://doi.org/10.1007/s11306-018-1404-2
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DOI: https://doi.org/10.1007/s11306-018-1404-2