The salivary proteome reflects some traits of dietary habits in diabetic and non-diabetic older adults

Christophe Chambon, Eric Neyraud, Thierry Sayd, Pauline Bros, Romane Di Biagio, Frank Hyvrier, Catherine Féart, Perrine André, Fernando Rodriguez-Artalejo, Esther Lopez-Garcia, Esther Garcia-Esquinas, David Gomez-Cabrero, Gordon Proctor, Martine Morzel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Purpose: Objective markers of usual diet are of interest as alternative or validating tools in nutritional epidemiology research. The main purpose of the work was to assess whether saliva protein composition can reflect dietary habits in older adults, and how type 2 diabetes impacted on the saliva-diet correlates. Methods: 214 participants were selected from 2 European cohorts of community-dwelling older adults (3C-Bordeaux and Seniors-ENRICA-2), using a case–control design nested in each cohort. Cases were individuals with type 2 diabetes. Dietary information was obtained using the Mediterranean Diet Adherence Screener (MEDAS). Saliva was successfully obtained from 211 subjects, and its proteome analyzed by liquid chromatography–tandem mass spectrometry. Results: The relative abundance of 246 saliva proteins was obtained across all participants. The salivary proteome differed depending on the intake level of some food groups (especially vegetables, fruits, sweet snacks and red meat), in a diabetic status- and cohort-specific manner. Gene Set Enrichment Analysis suggested that some biological processes were consistently affected by diet across cohorts, for example enhanced platelet degranulation in high consumers of sweet snacks. Minimal models were then fitted to predict dietary variables by sociodemographic, clinical and salivary proteome variables. For the food group «sweet snacks», selected salivary proteins contributed to the predictive model and improved its performance in the Seniors-ENRICA-2 cohort and when both cohorts were combined. Conclusion: Saliva proteome composition of elderly individuals can reflect some aspects of dietary patterns.

Original languageEnglish (US)
Pages (from-to)4331-4344
Number of pages14
JournalEuropean Journal of Nutrition
Volume60
Issue number8
DOIs
StatePublished - Dec 2021

Keywords

  • Ageing
  • Diabetes
  • Gene Set Enrichment Analysis
  • Proteomics
  • Salivary biomarkers
  • Usual diet

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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