Role of DcR3 in T Cell Activation in SLE and RA
Recruitment status was Recruiting
|First Received Date ICMJE||January 11, 2006|
|Last Updated Date||January 11, 2006|
|Start Date ICMJE||January 2006|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||No Changes Posted|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Role of DcR3 in T Cell Activation in SLE and RA|
|Official Title ICMJE||Role of DcR3 in T Cell Activation in SLE and RA|
Decoy receptor 3 (DcR3), a new member of tumor necrosis factor receptor (TNFR) superfamily, is a decoy receptor for FasL and could inhibit FasL-induced apoptosis, has recently been shown to induce costimulation of T cells. Systemic lupus erythematosus (SLE) is an autoimmune disease with pathogenic autoantibodies and immune complexes results from abnormal immune responses including T and B lymphocyte hyperactivity, and formation of pathogenic subsets of autoantibodies. Rhematoid arthritis (RA) is a multi-systemic autoimmune disease characterized by persistent inflammatory synovitis. Activated T lymphocytes infiltration to synovium is strongly correlated with the symptoms. DcR3 mRNA is expressed in peripheral-blood T cells and is up-regulated after antigenic stimulation. The DcR3 gene has been demonstrated to be overexpressed in patients with sclerosis or SLE; however, role of DcR3 in SLE and RA as well as the effects of DcR3 on T cell immune response is still not clear. This study is to investigate role of DcR3-induced T cell activation in SLE and RA. The genetic polymorphisms of DcR3 in association with SLE and RA will be studied to elucidate the genetic factors associated with development of SLE and RA. For further explore the possible molecular mechanisms of elevated DcR3 in association with SLE, we attempt to study whether DcR3 could induce T cell activation via costimualtion and/or inhibit the activation induced cell death (AICD) of activated T cells in SLE and RA. This study will provide a new direction of therapy in reverse T cell hyper-reactivity in SLE and RA.
Specific Aim 1. Study DcR3-induced T cell activation in SLE and RA. A. Patients and controls Patients with SLE and RA in Department of Internal Medicine, National Taiwan University Hospital will be studied. All patient meet the criteria of the American College of Rheumatologists for diagnosis of SLE and RA. As controls, 20 healthy age- and gender-matched volunteers will be used. All the studies including samples involving human is in accordance with institutional guidelines.
B. Detection of serum DcR3 protein in SLE and RA patients C. T cell proliferation assay
Specific Aim 2. Study effects of DcR3 on activation-induced cell death (AICD) in SLE and RA In order to understand whether DcR3 could reduce the AICD in activated T cells in SLE and RA patients, the T cells from these patients will be assayed their AICD in the presence and absence of soluble DcR3-Fc.
Specific Aim 3. To investigate the association of clinical manifestation of SLE and RA with genetic polymorphism on DcR3 genes.
A. The gene sequencing and single nucleotide polymorphism (SNP) analysis of DcR3 genes.
B. The association of clinical manifestation of SLE and RA with genetic polymorphism on DcR3 genes.
|Study Type ICMJE||Observational|
|Study Design ICMJE||Observational Model: Case Control
Primary Purpose: Screening
Time Perspective: Cross-Sectional
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||Not Provided|
|Publications *||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Recruiting|
|Completion Date||December 2007|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
|Ages||18 Years and older|
|Accepts Healthy Volunteers||Yes|
|Location Countries ICMJE||Taiwan|
|NCT Number ICMJE||NCT00275899|
|Other Study ID Numbers ICMJE||9461701220|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Taiwan University Hospital|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Taiwan University Hospital|
|Verification Date||December 2005|
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