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Published on: September 25, 2011
Colorectal neoplasia-specific amino acid profiles and their diagnostic potential: a systematic review
Roza C M Opperman1,2,3, Sofie Bosch4,5, Eduard A Struys6
1Department of Gastroenterology and Hepatology, Amsterdam UMC, Vrije Universiteit Amsterdam, 1081 HV, Amsterdam, The Netherlands. r.opperman@amsterdamumc.nl.
Background:
Metabolomics offers novel insights into metabolic alterations in colorectal cancer (CRC), including changes in amino acid profiles. Several studies have reported differences between CRC patients and controls, suggesting potential diagnostic utility.
Purpose:
To evaluate evidence on amino acid alterations in CRC and advanced precursors across biological matrices and their potential as non-invasive biomarkers.
Method:
A comprehensive search of MEDLINE, EMBASE, and Cochrane CENTRAL identifi ed 77 studies analysing amino acids in faeces, urine, serum, plasma, tissue, and saliva.
Results:
Few studies included advanced adenomas and none assessed advanced serrated polyps. Results were heterogeneous across matrices, except for tissue, where most amino acids were consistently upregulated in CRC. Reported diagnostic performance varied widely (AUC 0.28-0.91), with limited external validation.
Conclusion:
Overall, amino acids show limited standalone diagnostic value but may enhance multi-metabolitepanels. Standardisation, inclusion of early lesions, and robust validation are essential for future biomarker research.
