Abstract
Objective
To reveal the characteristics and potential role of natural killer T-like cells (NKT-like cells) in the pathogenesis of primary Sjögren’s syndrome (pSS).
Methods
Forty-six patients with pSS and 30 healthy subjects were enrolled in the study. The frequencies and cell count of NKT-like cells as well as other lymphocyte subsets were analyzed by flow cytometry. The clinical and laboratory indicators of pSS patients were also collected. Then, the correlation between NKT-like cells and pSS patient manifestations was analyzed by Spearman’s rank test. In addition, NKT-like cells before and after therapy were also compared.
Results
Both the number and the frequencies of NKT-like cells were significantly decreased in pSS patients. The counts of NKT-like cells were positively correlated with CD4+ T cells (r = 0.464, P = 0.001), CD8+ T cells (r = 0.363, P = 0.013), NK cells (r = 0.488, P = 0.001), and IgM levels (r = 0.443, P = 0.002), while negatively correlated with the disease duration (r = − 0.33, P = 0.027). Moreover, after effective therapy, NKT-like cells were recovered both in the cell counts and frequencies.
Conclusion
In pSS, NKT-like cells were fundamentally decreased, potentially contributing to the disease pathogenesis. Modulating the status of NKT-like cells might provide a novel strategy for treating the disease.
Key Points
• NKT-like cells were significantly decreased in pSS patients.
• NKT-like cells were correlated with pSS patient manifestations.
• NKT-like cells might be serverd as a new marker for assessing the status of pSS.
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Funding
This work was supported by grants from the Research and Development project of Peking University People’s Hospital (RDC2019-01 to Dr. Yingni Li), the National Natural Science Foundation of China (81971523 and 81671604 to Dr. F. Hu, 81871281 to Dr. Yuan Jia), the Beijing Nova Program (Z181100006218044 to Dr. F. Hu), and the Clinical Medicine Plus X-Young Scholars Project of Peking University (PKU2021LCXQ014 to Dr. F. Hu). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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All procedures performed in studies involving human participants were in accordance with a protocol approved by the ethical committee of Peking University People’s Hospital. All the participants gave written informed consent.
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Zhou, X., Li, Q., Li, Y. et al. Diminished natural killer T-like cells correlates with aggravated primary Sjögren’s syndrome. Clin Rheumatol 41, 1163–1168 (2022). https://doi.org/10.1007/s10067-021-06011-z
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DOI: https://doi.org/10.1007/s10067-021-06011-z