| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Systemic Lupus Erythematosus (SLE) |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Systemic Lupus Erythematosus (SLE) |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Immune System Diseases [C20] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| 
| E.1.2 | Version | 17.0 |  
| E.1.2 | Level | LLT |  
| E.1.2 | Classification code | 10025139 |  
| E.1.2 | Term | Lupus erythematosus systemic |  
| E.1.2 | System Organ Class | 100000004859 |  | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| The primary objective of this study is to evaluate the efficacy of LY2127399 120 mg Q4W + SoC or 120 mg Q2W + SoC compared to placebo + SoC as assessed by the proportion of patients who achieve a response as defined by the SRI-5 at Week 52 in patients with SLE. 
 Response is defined as follows:
 - Reduction of ≥5 points from baseline in SELENA-SLEDAI score;
 - No new BILAG A or no more than 1 new BILAG B disease activity scores;
 and
 - No worsening (defined as an increase of ≥0.3 points from baseline) in PGA.
 |  | 
| E.2.2 | Secondary objectives of the trial | 
| The secondary objectives of the study are as follows: - To evaluate the efficacy of LY2127399 120 mg Q4W + SoC or 120 mg Q2W + SoC compared to placebo + SoC from baseline to Week 52
 - To evaluate the impact of LY2127399 120 mg Q4W + SoC or 120 mg Q2W + SoC compared to placebo + SoC from baseline to Week 52 on key patient-reported outcomes (PROs)
 - To evaluate the safety and tolerability of LY2127399 120 mg Q4W + SoC or 120 mg Q2W + SoC compared to placebo + SoC.
 - To characterize the time course of change in absolute B cell counts and changes in serum Ig levels to treatment with LY2127399 versus placebo over the study period.
 - To characterize the population PK of LY2127399 and explore PK/pharmacodynamic (PD) relationships.
 - To assess the potential development of anti-LY2127399 antibodies and the impact on patient safety, efficacy, and LY2127399 PK.
 |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| [1] Clinical diagnosis of SLE by American College of Rheumatology (ACR) criteria [2] Have positive antinuclear antibodies (ANA)
 [3] Agree not to become pregnant throughout the course of the trial
 [4] Have the appropriate Safety of Estrogens in Lupus Erythematosus National Assessment - Systemic Lupus Erythematosus Disease Activity Index (SELENA-SLEDAI) score at screening
 
 |  | 
| E.4 | Principal exclusion criteria | 
| [1] Have active severe Lupus kidney disease [2] Have active Central Nervous System or peripheral neurologic disease
 [3] Have received intravenous immunoglobulin (IVIg) within 180 days of randomization
 [4] Have active or recent infection within 30 days of screening
 [5] Have had a serious infection within 90 days of randomization
 [6] Have evidence or test positive for Hepatitis B
 [7] Have Hepatitis C
 [8] Are human immunodeficiency virus (HIV) positive
 [9] Have evidence of active or latent tuberculosis (TB)
 [10] Presence of significant laboratory abnormalities at screening
 [11] Have had a malignancy in the past 5 years, except for cervical carcinoma in-situ or basal cell or squamous epithelial skin cell that were completely resected with no reoccurrence in the 3 yrs prior to randomization
 [12] Have received greater than 40 mgs of prednisone or equivalent in the past 30 days
 [13] Have changed your dose of antimalarial drug in the past 30 days
 [14] Have changed your dose of immunosuppressive drug in the past 90 days
 [15] Have previously received rituximab
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Proportion of patients achieving an SLE Responder Index response at week 52 
 
 
 |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point |  | 
| E.5.2 | Secondary end point(s) | 
| - Proportion of patients able to decrease dose of prednisone or equivalent with no increase in disease activity at week 52 - Change from baseline to 52 weeks in anti-double stranded deoxyribonucleic acid (anti-dsDNA) level
 - Change from baseline to 52 week endpoint in Systemic Lupus Erythematosus Disease Activity Index (SLEDAI2K) score
 - Time to first severe SLE flare (SFI)
 - Proportion of patients with no worsening in Physician Global Assessment (PGA) score at 52 weeks
 - Change from baseline to 52 week endpoint in Brief Fatigue Inventory (BFI) scores
 - Change from baseline to 52 week endpoint Lupus Quality of Life (LupusQoL) composite and domain scores
 - Time to first new British Isles Lupus Assessment Group (BILAG A) or 2 new BILAG B SLE flares
 - Change from baseline to 52 week endpoint in PGA
 - Proportion of patients with an increase in corticosteroids dose at 52 weeks
 - Change from baseline to 52 weeks endpoint in SELENA-SLEDAI disease activity score
 - Proportion of patients achieving a response as measured by modified SRI with no BILAG A or no more than 1 BILAG B organ domain flares at 52 weeks
 - Change from baseline to 52 week endpoint BILAG numeric scores
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | Yes | 
| E.6.4 | Safety | Yes | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | Yes | 
| E.6.7 | Pharmacodynamic | Yes | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | No | 
| E.6.11 | Pharmacogenomic | Yes | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | Yes | 
| E.6.13.1 | Other scope of the trial description | 
| Dosing intervals of 120 mg every 2 weeks versus every 4 weeks |  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | Yes | 
| E.7.4 | Therapeutic use (Phase IV) | No | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | No | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | Yes | 
| E.8.1.5 | Parallel group | Yes | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | Yes | 
| E.8.1.7.1 | Other trial design description | 
| 3 arm study to investigate dosing intervals (2 weeks vs 4 weeks vs placebo) |  | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | No | 
| E.8.2.2 | Placebo | Yes | 
| E.8.2.3 | Other | No | 
| E.8.2.4 | Number of treatment arms in the trial | 3 | 
| E.8.3 | The trial involves single site in the Member State concerned | No | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | Yes | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 5 | 
| E.8.5 | The trial involves multiple Member States | Yes | 
| E.8.5.1 | Number of sites anticipated in the EEA | 47 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | Yes | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
| Argentina |  
| Austria |  
| Belarus |  
| Bulgaria |  
| Canada |  
| Chile |  
| Colombia |  
| Croatia |  
| Egypt |  
| Germany |  
| Guatemala |  
| Italy |  
| Japan |  
| Korea, Republic of |  
| Macedonia, the former Yugoslav Republic of |  
| Peru |  
| Philippines |  
| Poland |  
| Singapore |  
| Thailand |  
| Turkey |  
| Ukraine |  
| United States |  | 
| E.8.7 | Trial has a data monitoring committee | Yes | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial | 
| End of study (trial) is the date of the last visit or last scheduled procedure shown in the Study Schedule for the last active patient in the study. |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 4 | 
| E.8.9.1 | In the Member State concerned months | 4 | 
| E.8.9.1 | In the Member State concerned days | 0 | 
| E.8.9.2 | In all countries concerned by the trial years | 4 | 
| E.8.9.2 | In all countries concerned by the trial months | 4 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |