Cutaneous mucosa-associated lymphoid tissue lymphoma complicating Sjögren's syndrome:A case report and review of literature

BACKGROUND The association of Sjögren's syndrome(SS)and lymphoma is similar.Mucosaassociated lymphoid tissue(MALT)or extranodal marginal zone B-cell lymphoma was the most common lymphomatous histology in SS patients.MALT in SS patients is frequently located in the parotid gland,while MALT lymphoma of the skin with SS is an exceedingly rare entity that needs to be recognized.CASE SUMMARY A 60-year-old woman presented with a 3-year history of progressive dry mouth associated with a 1-year history of enlarging cutaneous nodules.Physical examination revealed two hard subcutaneous nodules on her right lower leg.The results of Schirmer’s test were positive,despite the absence of dry eyes.Labial salivary gland biopsy revealed lymphocytic infiltration and chronic inflammation with a focus score of 2.The patient was diagnosed with SS.She underwent resection of one cutaneous nodule,and histopathological analysis identified the nodule as MALT lymphoma.Her dry mouth symptoms improved,and the nodules decreased after 6 mo of treatment with hydroxychloroquine sulfate and chemotherapy(thalidomide,cyclophosphamide,and dexamethasone).CONCLUSION Lymphoma is a severe complication of SS,shown by the reported unique case of cutaneous MALT lymphoma with SS.

New-onset primary Sjögren's syndrome following exposure to severe acute respiratory syndrome coronavirus 2: A retrospective cohort study

Background:Understanding the clinical implications of autoimmune manifestations associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is essential to reduce its consequences. This study was aimed at determining the activities of new-onset primary Sjögren syndrome (pSS) since the emergence of SARS-CoV-2.Methods:This retrospective cohort study included data from 471 participants with dry mouths and eyes who had been attending Nanjing Drum Tower Hospital since December 2019. By April 2023, patients diagnosed with pSS were sequentially assigned to vaccinated group ( n = 24) or vaccinated and infected group based on exposure ( n = 20). Patients diagnosed with pSS within 3 months of vaccination against SARS-CoV-2 were assigned to a vaccinated group, and those who had been vaccinated and then developed pSS within 3 months of follow up after direct exposure to SARS-CoV-2 were assigned to a vaccinated and infected group. The controls comprised age- and sex-matched patients who had not been exposed to SARS-CoV-2 before December 2019 ( n = 21). We then compared data among the three groups. Results:The vaccinated and infected patients had more fever, malaise, splenomegaly, and weight loss before diagnosis and a higher European Alliance of Associations for Rheumatology Sjögren's syndrome disease activity index at the time of onset than the other two groups. Vaccinated patients had a higher frequency of anti-nuclear antibody (ANA) titers > 1:320 ( n = 12;50%) and anti-phospholipid antibodies (aPL) ( n = 7;29%) than the controls. The frequency of anti-Ro/SSA antibodies (13, 65%), ANA titers > 1:320 ( n = 16;80%), and aPLs ( n = 7;29%) ( n = 5;25%) were all significantly higher in vaccinated patients with infection than those in the controls. Higher doses of glucocorticoids, cyclosporin A, and tacrolimus were administered to the vaccinated and infected than the vaccinated and control groups ( p < 0.05, for all). Conclusions:Patients with new-onset pSS and a history of vaccination and SARS-CoV-2 infection might have more active disease. Further strengthening the assessment of people with a clear history of SARS-CoV infection and the monitoring of potential populations for autoimmune screening should not be overlooked.

Identification and functional analysis of shared gene signatures between systemic lupus erythematosus and Sjogren's syndrome

Background:Systemic lupus erythematosus(SLE)is an autoimmune disease that can affect multiple systems.Sjogren's syndrome(SS)is an autoimmune disease that may be primary SS(pSS)or occur together with other autoimmune diseases,including SLE.This study aimed to explore the shared gene signatures in SLE and pSS.Methods:Gene expression data sets of SLE(GSE50772 and GSE81622)and pSS(GSE84844 and GSE48378)were obtained and analyzed for differentially expressed genes(DEGs)in peripheral blood mononuclear cells(PBMCs).A protein–protein interaction(PPI)network was constructed.Gene ontology(GO)and KEGG pathway enrichment analysis were carried out for the DEGs.Results:We screened 232 and 110 DEGs from the SLE and pSS data sets,respectively.We found 32 shared DEGs,which were all upregulated in patients compared with controls.Among these 32 DEGs,11 genes showed a more than twofold change in all data sets(IFI27,IFI44L,RSAD2,IFIT1,IFI44,USP18,IFI6,HERC5,EPSTI1,OAS1,and OAS3).PPI analysis showed that 29 genes interacted with each other.GO analysis showed that these 32 shared DEGs were mainly enriched in biological processes associated with the type Ⅰ interferon signaling pathway,defense response to viruses,response to viruses,negative regulation of viral genome replication,and the immune response.Kyoto Encyclopedia of Genes and Genomes pathway analysis showed that these 32 DEGs were related to virus infection.Conclusion:This study showed that alterations to biological processes associated with the response to virus infection play critical roles in both SLE and pSS.