This is an extension study for all participants who completed study 211LE201 (NCT01499355) through Week 52 and did not discontinue BIIB023 or placebo. Eligible participants from Study 211LE201 will be followed for up to 108 weeks.~Participants who received BIIB023 low dose or high dose in 211LE201 will continue to receive the same dosing in this study (211LE202; NCT01930890) in addition to background therapy. Participants who received placebo in 211LE201 are randomized to receive either BIIB023 low dose or high dose in addition to background therapy.
The primary objective of the study is to evaluate the long-term safety and tolerability of BIIB023 in participants with lupus nephritis (LN).