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Dietary tyramine promotes colon cancer risk and development via increased DNA damage and enhanced inflammation [ApcMin/+]

ABSTRACT: High consumption of dietary red or processed meat and fat are linked to increased risk of colorectal cancer (CRC). A number of potential mechanisms have been reported, such as the presence of dietary carcinogenic compounds, and elevated gut microbial degradation of proteins and glycoproteins. Tyramine is a commonly found biogenic amine in processed food and can also be produced by the gut microbiota from the dietary amino acid tyrosine. The role of tyramine in intestinal mucosal health and CRC tumorigenesis has not been well studied. Therefore, we used the human colorectal HCT116 cell line and the ApcMin/+ mouse model to investigate the role of tyramine in CRC.

ORGANISM(S): Mus musculus

PROVIDER: GSE235264 | GEO | 2025/03/05

REPOSITORIES: GEO

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Project description:Biogenic amine-producing bacteria are responsible for the production of basic nitrogenous compounds, such as histamine, cadaverine, tyramine and putrescine, after foods spoil due to microorganisms. In the present work, we applied a shotgun proteomics approach to quickly and easily characterize 15 different foodborne strains of biogenic amine-producing bacteria. A total of 10673 peptide spectrum matches (PSMs) belonging to 4081 nonredundant peptides and corresponding to 1811 annotated proteins were identified. With the results, relevant functional pathways were determined and the strains were differentiated into different Euclidean hierarchical clusters. Moreover, a predicted protein‒protein interaction network of biogenic amine foodborne strains was created. The whole confidence network contains 260 nodes and 1973 interactions. Most of the identified proteins were related to pathways and networks of energy, putrescine metabolism and host‒virus interaction. In addition, a total of 556 nonredundant peptides were identified as virulence factors, and most of these peptides corresponded to functions such as toxins, antimicrobial compound production, antimicrobial resistance, additional resistances and tolerances, host colonization and immune evasion, ABC transporters, phage proteins, and alternative virulence factors and proteins involved in horizontal transfer. Potential species-specific peptide biomarkers were screened. Thus, 77 species-specific peptide biomarkers belonging to 64 different proteins were proposed to identify 10 species (Enterobacter aerogenes, Enterobacter cloacae, Hafnia alvei, Klebsiella oxytoca, Morganella morganii, Proteus mirabilis, Proteus penneri, Proteus vulgaris, Raoutella planticola, Stenotrophomonas maltophilia). All of these results constitute the first major dataset of peptides and proteins of seafood biogenic amine-producing strains. This repository may be useful for further studies, for the development of new therapeutic treatments for food intoxication and for tracking microbial sources in foodstuffs.