Salivary Biomarkers of Stress, Anxiety and Depression

Stress, anxiety and depressive disorders are often characterized by the activation of the stress axis, which results in similar symptoms at some point in these disorders. These disorders are closely related to each other-they occur simultaneously or follow one another. The diagnosis of stress, anxiety and depression is not a perfect procedure currently-it is based on patient observation and an interview with the patient and their family. There are no laboratory tests that would dispel the doubts of the doctor making the diagnosis and allow the appropriate treatment to be implemented as soon as possible. Therefore, this study will review the components of saliva that could be helpful in the quick diagnosis of stress, anxiety and/or depression. Such potential salivary biomarkers could also be useful in monitoring the effectiveness of pharmacological treatment prescribed by a psychiatrist. The following are promising salivary biomarkers of stress, anxiety or depression: cortisol, immunoglobulin A (sIgA), lysozyme, melatonin, alpha-amylase (sAA), chromogranin A (CgA) and fibroblast growth factor 2 (FGF-2). To the best valuable potential salivary markers of stress, we can include cortisol, lysozyme, sAA and CgA. To differentiate depression from stress, salivary cortisol and melatonin can be helpful. Fluctuations in the concentrations of the above-mentioned substances in saliva indicate a particularly strong relationship with typical human psychological problems, such as stress, depression or anxiety.

Automated summary

Stress, anxiety and depression are often characterized by activation of the stress axis, leading to similar symptoms and closely related occurrences. Current diagnosis methods lack laboratory tests for confirmation, hence studying salivary components may aid in quick diagnosis and treatment monitoring. Promising salivary biomarkers such as cortisol, sIgA, lysozyme, melatonin, sAA, CgA, and FGF-2, show fluctuations in saliva concentrations, indicating strong associations with psychological issues like stress, depression, and anxiety.