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Article Abstract

Introduction: Metabolic processes play a role in cancer development, with faecal amino acids emerging as potential biomarkers for colorectal neoplasia. While fresh frozen tissue is preferred for metabolomic analysis, formalin-fixed paraffin-embedded (FFPE) tissue is more widely available.

Objectives: We aimed to evaluate amino acid profiles in FFPE tissue across different stages of the adenoma-carcinoma sequence.

Method: A panel of 20 amino acids was measured using liquid chromatography-tandem mass spectrometry.

Results: Fourteen amino acids were detected, with proline elevated in colorectal carcinoma versus advanced (FC 2.33, p = 0.04) and non-advanced adenomas (FC 2.42, p = 0.02).

Conclusion: Despite analytical challenges, amino acid profiling in FFPE tissue is feasible.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12301268PMC
http://dx.doi.org/10.1007/s11306-025-02301-8DOI Listing

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