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• W2896927478 abstract "Background In the patients with primary Sjogren’s syndrome (pSS), overexpression of CD40 was reported. The increased CD40 expression contributes to enhance CD40-CD40L interaction and promotes the inflammatory response in various ways. Objectives To investigate whether CD40 DNA vaccine could inhibit the immune response and slow the disease progression of SS in non-obese diabetic (NOD) mice. Methods Female 8-week-old NOD mice were randomly divided into 3 groups. CD40 DNA vaccine group received pTaget CD40 DNA vaccine at a weekly dose of 50 ug for 4 weeks. Vector and NS group were administered an equivalent amount of empty vector or NS. Serum anti-CD40 antibody was measured by ELISA. Lymphocytes infiltration in the salivary glands was monitored by focus score (FS) calculation. Salivary CD40 was stained by immunohistochemistry. Splenic lymphocyte phenotypes were analysed by flow cytometry. CD40, TNF-α and IL-6 levels in the salivary glands were detected by PCR. Serum ANA was monitored by immunoflurescene. Results 1) CD40 DNA vaccination induced anti-CD40 antibody response We found the positive rate on anti-CD40 antibody in vaccine group was 80% at week 6% and 100% at week 10, which was significantly increased compared with that in nonvaccinated ones.(p 2) Expression of CD40 decreased in salivary glands in vaccine group At week 10, CD40 expression on ductal epithelial and endothelial cells in NOD mice of vaccine group was significantly decreased positive staining. CD40 mRNA expression level showed a significantly reduction compared to vector group (0.51±0.31 vs. 1.56±0.53, p 3) Down-regulation of lymphocytes infiltration in the salivary glands of mice in vaccine group At week 10, infiltration of lymphocytes was inhibited in treated group while increased in control group (F=5.275, P 4) CD40 DNA vaccine reduced the expression of TNF-α and IL-6 in the salivary glands In vaccine group, the expression level of TNF-α mRNA in salivary glands were declined significantly as compared to baseline (0.41±0.25 vs. 0.98±0.16, p 5) Disturbances in spleen DC and plasma cell subpopulations At week 6, the total numbers of CD11c+DC decreased as compared with two control groups (p 6) Level of ANA reduced in the vaccine group At week 10, the expression of ANA in HEp-2 cells is strong positive (++++) in both control groups, but only positive (+) in vaccine group. Conclusions These findings indicate that CD40 DNA vaccine can downregulate the expression of proinflammatory cytokines of TNF-α and IL-6, decrease the percentage of DCs and plasma cells, ameliorate the pathologic change in NOD mice with SS, and thus inhibit the autoimmune inflammation. Disclosure of Interest None declared" @default.
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• W2896927478 date "2018-06-01" @default.
• W2896927478 modified "2023-09-26" @default.
• W2896927478 title "FRI0255 Injection of cd40 dna vaccine ameliorates the autoimmune pathology of non-obese diabetic mice with sjogren’s syndrome" @default.
• W2896927478 doi "https://doi.org/10.1136/annrheumdis-2018-eular.3939" @default.
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