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Characterising salivary peptidome across diurnal dynamics and variations induced by sampling procedures
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Characterising salivary peptidome across diurnal dynamics and variations induced by sampling procedures
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Journal Article
Characterising salivary peptidome across diurnal dynamics and variations induced by sampling procedures
2023
Overview
ObjectivesThis study aimed to characterise diurnal dynamics of salivary peptidome and variations induced by sampling procedures.Materials and methodsA supervised short-term longitudinal study was conducted amongst ten healthy participants. Saliva samples were collected by different procedures (stimulated/unstimulated conditions, forepart/midstream segments) on three consecutive days. The peptidome compositions of saliva samples were analysed using matrix-assisted laser desorption/ionisation-time of flight-mass spectrometry (MALDI-TOF MS).ResultsThe salivary peptidome exhibited a stable trend generally, even though some diurnal dynamics happened in aspects of both overall structure and certain single peptides. The results indicated saliva samples collected under unstimulated and stimulated conditions have significantly different structures of peptidome, whilst the peptidome profile of stimulated saliva was more abundant than that of unstimulated saliva. It was also indicated that the midstream segment effect might exist in the segmented process of saliva sampling.ConclusionsIn summary, salivary peptidome was able to maintain stability though some dynamic changes might happen within a short-term period. Stimulated and unstimulated saliva samples had significantly different peptidome profiles, whilst the stimulated whole saliva was a larger pool of low molecular weight peptides.Clinical relevanceThe stability of the salivary peptidome highlights the reliability of salivary peptidome as a source of diagnostic biomarker. We recommend keeping one collection condition (stimulated/unstimulated) consistently within one study on salivary peptidome. Stimulated whole saliva would be preferred if more abundant peptidome profile is needed.
Publisher
Springer Nature B.V
Subject
