Abstract
Human hepatocellular carcinoma (HCC) is the most recurrent malignancy of the liver and represents one of the main causes of cancer death worldwide. Furthermore, the liver is the most frequent site of metastatic colonization, and hepatic metastases are far more common than primary cancers in Western countries. A possible way of investigating liver diseases is to study the tissue metabolic profiles. High-resolution nuclear magnetic resonance (NMR) spectroscopy of hepatic tissue extracts was combined with pattern-recognition and visualization techniques to uncover metabolic differences among analyzed tissue types. Extracts were from primary HCC, chronic hepatitis-C-virus related cirrhotic tissues, hepatic metastases from colorectal carcinomas, and non-cirrhotic normal liver tissues adjacent to metastases as controls. We identified all metabolites present in the NMR spectra, and after statistical evaluation of all spectral classes, we were able to define the metabolic changes underlying the different liver conditions and diseases. In particular, the lactate and the glucose tissue signals were found to primarily discriminate the different histological samples. We followed the biochemical changes of human hepatic lesions through primary (HCC) and secondary (metastases from colorectal carcinoma) liver tumors, cirrhotic tissues, and non-cirrhotic histologically-confirmed normal liver tissues adjacent to metastases, achieving a metabolic differentiation of the various pathological states based upon the variation of the intracellular lactate/glucose ratio. It is suggested that such a signal pattern may act as a potential marker for assessing pathological hepatic lesions.
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Acknowledgments
We are grateful to patients for their important contribution to this study. We thank Dr. Lorenza Broccardo (S-IN Soluzioni Informatiche, Vicenza, Italy) for helpful discussions, and Emilio P. Castelluccio (ICB-CNR, Pozzuoli) for computer maintenance. Partial financial support was received from the Italian Ministry of Health “Progetto Ricerca Finalizzata”, Italian Association for Cancer Research (AIRC), Sardinia Regional Government “Regione Autonoma della Sardegna”, and Consiglio Nazionale delle Ricerche.
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Debora Paris, Dominique Melck and Matteo Stocchero contributed equally to this work.
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Paris, D., Melck, D., Stocchero, M. et al. Monitoring liver alterations during hepatic tumorigenesis by NMR profiling and pattern recognition. Metabolomics 6, 405–416 (2010). https://doi.org/10.1007/s11306-010-0209-8
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DOI: https://doi.org/10.1007/s11306-010-0209-8