Saliva in the diagnosis of diseases

Chen-Zi Zhang, Xing-Qun Cheng, Ji-Yao Li, Ping Zhang, Ping Yi, Xin Xu, Xue-Dong Zhou, Chen-Zi Zhang, Xing-Qun Cheng, Ji-Yao Li, Ping Zhang, Ping Yi, Xin Xu, Xue-Dong Zhou

Abstract

Saliva is secreted from the salivary glands and has multiple functions, including mouth cleaning and protection, antibacterial effects and digestion. With the rapid advancement in salivaomics, saliva is well recognized as a pool of biological markers. Saliva, as a non-invasive and safe source, could be a substitute for blood in the diagnosis and prognosis of diseases. This review summarizes the latest advancements in saliva-related studies and addresses the potential value of saliva in the early diagnosis of oral diseases, such as dental caries and periodontal disease, as well as cancer, diabetes and other systemic disorders. Saliva biomarkers range from changes in the biochemical indices of DNA, RNA and proteins to the diversification of microbiota structures. This study integrates data reported in the recent literature and discusses the clinical significance and prospects for the application of saliva in the early diagnosis of diseases, translational medicine and precision medicine.

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