A Phase 2B Open-Label, Single-Arm, Repeat-Dose Study to Evaluate the Reliability of an Autoinjector

The primary objective of this study is to assess the suitability of the autoinjector for self-administration of belimumab by subjects with SLE in real-life conditions. The study will assess the use of the autoinjector inside the clinic setting and outside the clinic setting. The study will also assess the safety and tolerability of belimumab administered subcutaneously (SC) via the autoinjector. Subjects will self-administer belimumab SC into the thigh or abdomen using the autoinjector device for 8 weekly doses. Subjects will return for a follow-up visit 4 weeks after the last SC dose of belimumab. All injections will be assessed by the investigators for success based on direct observation and/or the subject diary. A total of 118 subjects (treated with at least one dose of study drug) are planned to be enrolled in this study.