Utility of a Measure of Lupus Low Disease Activity State (LLDAS) in SLE

Study Overview
=================
Brief Summary
-----------------
This study is a secondary, pooled analysis of two completed phase 3 clinical trials: (i) GSK-HGS1006-C1056 (BLISS-76): A Phase 3, Multi-Center, Randomized, Double-Blind, Placebo-Controlled, 76-Week Study to Evaluate the Efficacy and Safety of Belimumab (HGS1006, LymphoStat-B™), a Fully Human Monoclonal Anti-BLyS Antibody, in Subjects with Systemic Lupus Erythematosus (SLE); and, (ii) GSK-HGS1006-C1057 (BLISS-52): A Phase 3, Multi-Center, Randomized, Double-Blind, Placebo-Controlled, 52-Wk Study to Evaluate the Efficacy and Safety of Belimumab (HGS1006, LymphoStat-B™), a Fully Human Monoclonal Anti-BLyS Antibody, in Subjects With Systemic Lupus Erythematosus (SLE) The study will assess the discriminant validity of a proposed measure of low disease activity (the Lupus Low Disease Activity State, LLDAS) in patients with SLE.

Detailed Description
-----------------
Systemic Lupus Erythematosus (SLE) is a multisystem autoimmune disease with an estimated incidence of 5-50 cases per 100,000 people. Despite advances in therapy, there is still significant mortality and morbidity associated with this disease. There have been no clearly defined treatment goals in SLE, hindering the development of treat to target approaches and evaluation of new therapies. Although remission is aimed for, it rarely occurs. A more achievable clinical state and treatment goal of low disease activity has been described recently and a preliminary single centre validation study has demonstrated its association with improved outcomes. This endpoint is termed Lupus Low Disease Activity State (LLDAS). The proposed study will assess the discriminant validity of the proposed LLDAS criteria in a clinical trial dataset. The objective of the research is to validate the Lupus Low Disease Activity State (LLDAS) tool as a study endpoint in SLE. The data available from the belimumab BLISS trials will be used to evaluate the LLDAS score. The outcome of these studies will be validation of the LLDAS instrument in a clinical trial dataset, for the first time. This will allow future studies to consider incorporating LLDAS attainment as a trial endpoint, for example allowing comparison of frequency of achieving LLDAS to discriminate between treatments. The findings will be interpreted using statistical methods and will be published / presented to the public and to peers via peer-reviewed publications, conference presentations, and where relevant the lay media.

Official Title
-----------------
Utility of a Measure of Lupus Low Disease Activity State (LLDAS) in SLE: Pooled Analysis of the HGS1006-C1056 (BLISS-76) and HGS1006-C1057 (BLISS-52) Trials

Conditions
-----------------
Systemic Lupus Erythematosus

Participation Criteria
=================
Eligibility Criteria
-----------------
Key Inclusion Criteria: Clinical diagnosis of SLE by ACR criteria. Active SLE disease. Autoantibody-positive. On stable SLE treatment regimen. Key Exclusion Criteria: Pregnant or nursing Have received treatment with any B cell targeted therapy. Have received treatment with a biological investigational agent in the past year. Have received IV cyclophosphamide within 180 days of Day 0. Have severe lupus kidney disease. Have active central nervous system (CNS) lupus. Have required management of acute or chronic infections within the past 60 days. Have current drug or alcohol abuse or dependence. Have a historically positive test or test positive at screening for HIV, hepatitis B, or hepatitis C.

Ages Eligible for Study
-----------------
Minimum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------
What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of participants who attain the Lupus Low Disease Activity State (LLDAS) | A composite end-point involving SLEDAI-2K ≤4 with no reported renal, central nervous system, cardiopulmonary, vasculitis or gastrointestinal activity and no reported fever, hemolytic anemia or new disease activity since last assessment), SELENA-SLEDAI Physician Global Assessment ≤1, a current prednisolone dose of ≤7.5 mg daily and tolerance of maintenance doses of immunosuppressive drugs and approved biologic agents. | 52 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of patients achieving a SLE Responder Index (SRI) Response | a ≥ 4 point reduction from baseline in SELENA-SLEDAI score, and no worsening (increase of < 0.30 points from baseline) in PGA, and no new BILAG A organ domain score or 2 new BILAG B organ domain scores compared with baseline. SELENA SLEDAI is calculated from 24 individual descriptors; 0 indicates inactive disease and the maximum theoretical score is 105; scores > 20 are rare. PGA is a visual analog scale scored from 0 to 3 (1=mild, 2=moderate, 3=severe). BILAG uses a single score for each of the 8 organ domains; range is from severe to no disease (A to E). | 52 weeks |