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Salivary S100A8/A9 in Sjögren's syndrome accompanied by lymphoma

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)900-906
JournalJournal of Oral Pathology and Medicine
Volume47
Issue number9
Early online date6 Aug 2018
DOIs
Publication statusPublished - 1 Oct 2018

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Abstract

Background
Sjögren's syndrome (SS) is an autoimmune inflammatory disease that affects the exocrine glands. The absence of early diagnostic markers contributes to delays in its diagnosis. Identification of changes in the protein profile of saliva is considered one of the promising strategies for the discovery of new biomarkers for SS.

Objective
To identify salivary protein biomarkers with potential for use in discriminating between different lymphoma risk subgroups of SS.

Method
Parotid and whole mouth saliva samples were collected from patients with SS, including those in subgroups at higher risk of developing or with confirmed lymphoma, non‐SS sicca disease controls and healthy subjects. An initial proteomics analysis by mass spectrometry (LCMSMS) identified S100A8/A9 as a biomarker and was followed by validation with an enzyme‐linked immunosorbent assay (ELISA).

Results
Significant differences were found in levels of S100A8/A9 in parotid saliva but not whole mouth saliva between patients with SS compared with healthy and disease control subjects (P = 0.001 and 0.031, respectively). Subgroups of patients with SS based on lymphoma risk showed significant differences in salivary levels of S100A8/A9.

Conclusion
The results suggest that salivary levels of S100A8/A9 can aid in differentiating between SS, disease control and healthy control subjects, especially the subgroups of SS with lymphoma or at higher risk of lymphoma.

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