Journal
METABOLITES
Volume 13, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/metabo13010028
Keywords
saliva; metabolomics; metabolome; metabolites; cancer; carcinoma; neoplasm; tumour; biomarkers; oncological diagnostics
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Cancer is the leading cause of death worldwide, with breast, lung, and colorectal cancer being the most common types. Salivary metabolome profiling is a novel non-invasive method in oncological diagnosis. This systematic review found that changes in salivary metabolome, particularly in amino acid and polyamine pathways, showed significant predictive values in diagnosing breast, gastrointestinal, and lung cancers.
Cancers are the leading cause of death worldwide. The most common cancers include breast, lung, and colorectum. Salivary metabolome profiling is a novel non-invasive method in oncological diagnosis. This systematic review was designed to answer the question Are salivary metabolites reliable for the diagnosis of systemic cancers?. Following the inclusion and exclusion criteria, nineteen studies were included (according to PRISMA statement guidelines). Changes in salivary metabolome were most commonly determined in patients with breast cancer, gastrointestinal cancers, and lung cancer. Most studies involved unstimulated whole saliva as the diagnostic material, evaluated by different spectroscopic methods. Among the found saliva metabolites, the alterations in the metabolic pathways of amino acids and polyamines were most frequently observed, which showed significant predictive values in oncological diagnostics. The most frequently encountered risks of bias were the absence of data regarding blinding, sample size justification, and randomisation. In conclusion, salivary metabolites seem to be potentially reliable for detecting the most common systemic cancers. However, further research is desirable to confirm these outcomes and to detect new potential metabolic biomarkers in saliva.
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