Urinary(1)H-NMR Metabolic Signature in Subjects Undergoing Colonoscopy for Colon Cancer Diagnosis
APPLIED SCIENCES-BASEL
Authors: Piras, Cristina; Pibiri, Monica; Leoni, Vera Piera; Cabras, Francesco; Restivo, Angelo; Griffin, Julian Leether; Fanos, Vassilios; Mussap, Michele; Zorcolo, Luigi; Atzori, Luigi
Abstract
Featured Application Metabolomics can be a useful tool to support the diagnosis and the monitoring of colon cancer. Metabolomics represents a promising non-invasive approach that can be applied to identify biochemical changes in colorectal cancer patients (CRC) and is potentially useful for diagnosis and follow-up. Despite the literature regarding metabolomics CRC-specific profiles, discrimination between metabolic changes specifically related to CRC and intra-individual variability is still a problem to be solved. This was a preliminary case-control study, in which(1)H-NMR spectroscopy combined with multivariate statistical analysis was used to profile urine metabolites in subjects undergoing colonoscopy for colon cancer diagnosis. To reduce intra-individual variability, metabolic profiles were evaluated in participants' urine samples, collected just before the colonoscopy and after a short-term dietary regimen required for the endoscopy procedure. Data obtained highlighted different urinary metabolic profiles between CRC and unaffected subjects (C). The metabolites altered in the CRC urine (acetoacetate, creatine, creatinine, histamine, phenylacetylglycine, and tryptophan) significantly correlated with colon cancer and discriminated with accuracy CRC patients from C patients (receiver operator characteristic (ROC) curve with an area under the curve (AUC) of 0.875; 95% CI: 0.667-1). These results confirm that urinary metabolomic analysis can be a valid tool to improve CRC diagnosis, prognosis, and response to therapy, representing a noninvasive approach that could precede more invasive tests.
Binding of the experimental dual-action antiparkinsonian drug AG-0029 to dopamine D2 and histamine H3 receptors: a PET study in healthy rats
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING
Authors: Van Waarde, A.; Ghazanfari, N.; Sijbesma, J. W. A.; Garcia, D. Vallez; Kominia, M.; Koelewijn, M.; Attia, K.; Visser, T. J.; Heeres, A.; Willemsen, A. T. M.; Dierckx, R. A. J. O.; Elsinga, P. H.
Abstract