Abstract
Objective
Primary Sjögren’s syndrome (pSS) is an autoimmune disease with unknown etiology that is considered to be related to environmental and genetic factors. The aim of this study was to clarify the oral microflora characteristics of pSS patients and to reveal the connection between oral bacterial composition and dental caries using a high-throughput sequencing technique.
Methods
Thirty-five pSS patients and 20 healthy controls were enrolled in this study. We collected saliva and plaque samples from pSS patients and saliva samples from healthy controls. We used 16S ribosomal DNA (16S rDNA) high-throughput sequencing targeting the V3–V4 hypervariable region to determine the composition and structure of the microbiota in the three sample sets. Finally, bioinformatics analyses, including the diversity of the microbiota, species differences, and functional prediction were performed.
Results
In the alpha diversity and beta diversity analysis, the Chao1 (P < 0.01), observed species (P < 0.01), and PD whole tree indices (P < 0.01) were significantly lower in the saliva and plaque samples of pSS patients than in the saliva samples of healthy controls, but the Shannon (P < 0.01) and Simpson indices (P < 0.01) were significantly higher in the healthy controls, and their total diversity significantly differed. In the main flora composition at the genus level (top 10), we identified Prevotella and Veillonella as more enriched in the saliva of pSS patients and Fusobacterium, Actinomyces, and Leptotrichia as more enriched in the plaque of pSS patients. Predictive functional analysis showed that the oral microbiota of pSS patients was related to translation, metabolism of cofactors and vitamins, and nucleotide metabolism.
Conclusions
The oral microbial ecology of patients with pSS is dysregulated, resulting in a decrease in overall diversity. Prevotella and Veillonella may be related to pSS, while Fusobacterium, Actinomyces, and Leptotrichia may be related to dental caries in pSS patients.
Key Points • This study revealed differences in the oral microbial composition of patients with pSS compared to healthy controls. • We included a plaque group of pSS patients to identify the microbiota related to pSS and dental caries. • Prevotella and Veillonella may contribute to pSS, and Fusobacterium, Actinomyces, and Leptotrichia are associated with dental caries in pSS patients. |
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Data Availability
Data available on request from the authors.
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Acknowledgements
We thank the patients and healthy volunteers who made this study possible and provided their plaque or saliva samples.
Funding
This work was supported by grants from the Shantou Medical Health Science and Technology Plan (No. 2019–106-21) and the Medical Science Research Foundation of Guangdong Province (No. A2019244).
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Contributions
Clinical analyses and manuscript writing: Yiwen Xie and Yu Fan.
Sample and data collection: Miaotong Su and Yukai Wang.
Statistical analyses: All authors.
Study design: Yiwen Xie and Guohong Zhang.
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The sample collection was approved by the Regional Ethics Board of Shantou Central Hospital (approval number, 2019-scientific research (042)), and written informed consent was obtained from all participants.
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Xie, Y., Fan, Y., Su, M. et al. Characteristics of the oral microbiota in patients with primary Sjögren’s syndrome. Clin Rheumatol (2024). https://doi.org/10.1007/s10067-024-06958-9
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DOI: https://doi.org/10.1007/s10067-024-06958-9