An Efficacy and Safety Study of Sirukumab in Participants With Major Depressive Disorder

A double-blind, placebo-controlled, multicenter study of sirukumab as adjunctive treatment to a monoaminergic antidepressant in adults with major depressive disorder. Participants will be randomly assigned to receive either placebo or sirukumab 50 milligram (mg) at a ratio of 1:1 at Day 1, 28 and 56. Participants will primarily be assessed for change from baseline in Hamilton Depression Rating Scale (HDRS17) score at Week 12. Safety will be monitored throughout the study.