[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100566488":3},{"organization":4,"armGroups":7,"interventions":10,"overallOfficials":10,"centralContacts":15,"locations":10,"responsibleParty":21,"collaborators":10,"id":23,"slug":24,"hasResults":25,"nctId":26,"briefTitle":27,"officialTitle":28,"acronym":10,"eligibilityCriteria":29,"healthyVolunteers":25,"sex":30,"minAge":31,"maxAge":32,"enrollmentInfo":33,"targetDuration":10,"studyType":36,"phases":10,"briefSummary":37,"conditions":38,"keywords":10,"overallStatus":40,"whyStopped":10,"lastUpdateSubmitDate":41,"lastUpdatePostDateStruct":42,"startDateStruct":45,"completionDateStruct":47,"leadSponsor":49,"locationsCount":10},{"fullName":5,"class":6},"Peking University Third Hospital","OTHER",[8,12],{"label":9,"type":10,"description":11,"interventionNames":10},"IgG4-ROD",null,"IgG4-ROD patients from the Department of Ophthalmology at Peking University Third Hospital.",{"label":13,"type":10,"description":14,"interventionNames":10},"Lacrimal gland ptosis","Patients with lacrimal gland ptosis undergoing surgical repositioning fromthe Department of Ophthalmology at Peking University Third Hospital.",[16],{"name":17,"role":18,"phone":19,"phoneExt":10,"email":20},"Zhengze Sun","CONTACT","+86-15898285532","2411210462@pku.edu.cn",{"type":22,"investigatorFullName":10,"investigatorTitle":10,"investigatorAffiliation":10,"oldNameTitle":10,"oldOrganization":10},"SPONSOR","100566488","key-mechanisms-of-abnormal-t-cell-activation-and-differentiation-in-igg4-related-ophthalmic-disease-100566488",false,"NCT06655831","Key Mechanisms of Abnormal T Cell Activation and Differentiation in IgG4-Related Ophthalmic Disease","Study on the Key Mechanisms of Abnormal T Cell Activation and Differentiation in IgG4-Related Ophthalmic Disease","Inclusion Criteria:\n\n* Experimental Group: IgG4-ROD patients with lacrimal gland involvement, diagnosed based on 2014 and 2020 Japanese criteria for IgG4-ROD and IgG4-RD:\n\nClinical and imaging features: characteristic diffuse or localized swelling or nodular formations of the lacrimal glands.\n\nSerological diagnosis: Elevated serum IgG4 concentration (\\>135 mg\u002FdL).\n\nHistopathological diagnosis (meeting 2 of the 3 criteria below):\n\nDense lymphoplasmacytic infiltration with fibrosis. IgG4+ plasma cell\u002FIgG+ plasma cell ratio \\>40%, and \\>10 IgG4+ plasma cells per high-power field.\n\nCharacteristic fibrosis, especially storiform fibrosis, or obliterative phlebitis.\n\nControl Group: Patients with lacrimal gland ptosis confirmed by pathology and clinical\u002Fimaging features, requiring surgical repositioning.\n\nExclusion Criteria:\n\n* Presence of other autoimmune diseases like Sjögren's syndrome, systemic lupus erythematosus, or rheumatoid arthritis.\n\nLacrimal gland pathology indicating other orbital diseases such as MALT lymphoma or inflammatory pseudotumor.\n\nOther exclusion criteria include mental disorders, malignancies, or any condition deemed unsuitable for study participation.","ALL","18 Years","80 Years",{"count":34,"type":35},20,"ESTIMATED","OBSERVATIONAL","IgG4-related disease (IgG4-RD) is a newly recognized chronic inflammatory condition caused by immune system dysfunction. It is characterized by the infiltration of IgG4+ plasma cells, dense fibrosis, and inflammation involving veins and eosinophils. Common symptoms include elevated serum IgG4 levels and the formation of tumor-like growths that can affect almost any organ, leading to pressure on tissues, irreversible damage, and even organ failure. While estimates suggest a prevalence of 0.28 to 1.08 per 100,000 people, this might be an underestimation due to limited awareness, the new definition of the disease, and its subtle onset.\n\nIgG4-related ophthalmic disease (IgG4-ROD) is a subtype of IgG4-RD that affects the eye area, particularly the lacrimal glands, extraocular muscles, and surrounding nerves. It often presents as painless swelling of the lacrimal glands in one or both eyes, sometimes with discomfort or a sensation of a foreign body. It can also cause thickening of eye muscles, leading to symptoms like bulging eyes, blurred vision, or double vision. In some cases, mass lesions in the orbit may press on the optic nerve, potentially leading to permanent vision loss. While there is currently no cure for IgG4-ROD, steroids are used as the main treatment to control inflammation and fibrosis. However, the disease often recurs, with recurrence rates for IgG4-RD reported between 24% and 63% in various studies. Understanding the causes of IgG4-ROD could help develop better treatments and reduce the chances of relapse.\n\nStudies suggest that T cells play a key role in the development of IgG4-RD, including IgG4-ROD. CD4+ T cells are the main immune cells found in affected tissues. They can help B cells multiply and produce IgG4 antibodies and contribute to tissue fibrosis by releasing certain signaling molecules. Despite treatment with rituximab, a drug that targets B cells, many IgG4-RD patients experience relapses, indicating that T cells remain important in driving the disease. Among the T cell subtypes, T follicular helper cells (Tfh) and CD4+ cytotoxic T cells (CD4+ CTLs) are particularly relevant. Tfh cells support B cells in producing IgG4 antibodies, while CD4+ CTLs can contribute to tissue fibrosis by releasing factors like TGF-β, IL-1β, and IFN-γ. However, the detailed mechanisms of how T cells become abnormally activated and differentiated in IgG4-ROD remain unclear.\n\nThis study will use samples from the lacrimal glands, blood, and tears of IgG4-ROD patients to investigate how T cells become abnormally active and differentiate in this condition. The findings could identify new targets for therapy, helping to reduce the recurrence of IgG4-ROD and provide insights into treating other forms of IgG4-RD.",[39],"IgG4-Related Diseases","NOT_YET_RECRUITING","2024-10-21",{"date":43,"type":44},"2024-10-23","ACTUAL",{"date":46,"type":35},"2024-11-01",{"date":48,"type":35},"2025-02-01",{"name":5,"class":6}]