Sjogren's syndrome (SS) is an autoimmune disease. Its mechanism and treatment methods are unclear. The purpose of this study was to investigate the effects of rutin (Ru) on SS. Proteomics was used to detect differential proteins in the submandibular glands of normal mice and SS mice. Salivary secretion (SAS) and salivary gland index (SGI) were detected. Oxidative stress and inflammatory cytokine in submandibular glands were detected. The levels of NLRP3, ASC, Caspase-1, IL-1β, and p-NF-κBp65 in submandibular gland tissues and submandibular gland cells of overexpressed calcium-sensing receptor (over-CaR) mice and overexpressed CaR primary submandibular gland cells (over-CaR-PSGs) were detected. In total, 327 differential proteins were identified in the submandibular gland tissues of SS mice compared to control mice. CaR was one of the most differential proteins and significantly increased compared to control mice. Ru could significantly increase SGI and SGI, and inhibit oxidative stress and inflammatory cytokine in submandibular glands. In addition, Ru was shown to further improve SS via regulation of the CaR/NOD-like receptor thermal protein domain associated protein 3 (NLRP3)/nuclear factor kappa-B (NF-κB) signal pathway. Overexpression of CaR counteracted partial activity of Ru. CaR may be an important target for the treatment of SS. In addition, Ru improved the SS via the CaR/NLRP3/NF-κB signal pathway. This study provides a basis for the treatments for SS.
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