Shanghai Journal of Stomatology ›› 2023, Vol. 32 ›› Issue (5): 525-531.doi: 10.19439/j.sjos.2023.05.014

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Metabolomics study on the difference of tongue coating metabolites between patients with intra-oral halitosis and healthy individual

LIMAN Aviella-nathania1, ZHU Hong-lai2, YANG Wen-jie1, YE Wei1   

  1. 1. Department of Preventive Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine; College of Stomatology, Shanghai Jiaotong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology. Shanghai 200011;
    2. Xinzhuang Community Health Service Center, Minhang District. Shanghai 201199, China
  • Received:2023-01-29 Revised:2023-03-29 Online:2023-10-25 Published:2023-11-03

Abstract: PURPOSE: To analyze the difference of metabolites of tongue coating between patients with intra-oral halitosis and healthy individuals by untargeted metabolomics, and to explore significant differences in metabolites of intra-oral halitosis as biomarkers. METHODS: The untargeted metabolomics of tongue coating samples from 12 patients with intra-oral halitosis and 12 healthy individuals were studied by liquid chromatography and mass spectrometry combined with principal component analysis and orthogonal partial least squares discriminant analysis. The value of variable importance in projection >1 and P<0.05 of Student's t test in the orthogonal partial least squares-discriminant analysis model were used as the criteria to screen and determine the differential metabolites. RESULTS: There were differences in the metabolites of tongue coating between patients with intra-oral halitosis and healthy individuals, and 11 different metabolites were identified. They were valyl-arginine, glycine-phenylalanine, tryptophyl-proline, deoxyadenosine, 4,5-dihydroniveusin A, N-acetyl-DL-tryptophan, paramethasone acetate, cyclopentanol, [(2-hexylcyclopentylidene) amino]thiourea, L-pipecolic acid and taurine. In the intra-oral halitosis group, the expressions of Glycine-phenylalanine and N-acetyl-DL-tryptophan were significantly up-regulated, while the expressions of taurine were significantly down-regulated. CONCLUSIONS: There are differences in the metabolites of tongue coating between patients with intra-oral halitosis and healthy individuals. The differential metabolites with diagnostic value may be used as diagnostic markers of intra-oral halitosis.

Key words: Intra-oral Halitosis, Tongue coating, Metabolomics, Biomarker

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