The purpose of this study is to assess the efficacy of ustekinumab, in adult anti-TNF(alpha) refractory participants with active radiographic axial spondyloarthritis (AxSpA), as measured by the reduction in signs and symptoms of radiographic AxSpA.
This is a Phase 3, multicenter (when more than one hospital or medical school team work on a medical research study), randomized (study medication assigned to participants by chance), double-blind (neither the researchers nor the participants know what treatment the participant is receiving), placebo-controlled (an inactive substance; a pretend treatment \[with no drug in it\] that is compared in a clinical trial with a drug to test if the drug has a real effect) study. The study consists of 3 phases; Screening (up to 8 weeks), Treatment phase: placebo-controlled (Week 0 to 24) and active treatment (Week 24 to Week 52), and Safety Follow-up (up to 12 weeks). Participants will be randomly assigned to 1 of 3 treatment groups: placebo, ustekinumab 45 mg and ustekinumab 90 mg. The total duration of study will be up to 64 weeks. Participants will be primarily assessed for Assessment of SpondyloArthritis International Society (ASAS) 40 response at Week 24. Participants' safety will be monitored throughout the trial.
Placebo subcutaneous (SC) injection at Weeks 0, 4, and 16 in Group 1.
Ustekinumab 45 mg SC injection at Weeks 24 and 28 followed by every 12 weeks (q12w) dosing, with the last administration of study agent at Week 52 in Group 1. Participants will start with ustekinumab 45 mg SC injection at Weeks 0 and 4, followed by q12w dosing, with the last administration of study agent at Week 52 in Group 2.
Ustekinumab 90 mg SC injection at Weeks 24 and 28 followed by q12w dosing, with the last administration of study agent at Week 52 in Group 1. Participants will start with ustekinumab 90 mg SC injection at Weeks 0 and 4, followed by q12w dosing, with the last administration of study agent at Week 52 in Group 3.
Participants who meet EE criteria (less than \[\<\] 10 percent \[%\] improvement from baseline in both total back pain and morning stiffness measures at both Week 12 and Week 16) will be administered open-label golimumab 50 mg SC administrations at Week 16 and every 4 weeks (q4w) thereafter through Week 52 in Group 1, 2 and 3.
Buenos Aires, Argentina
Ciudad de Buenos Aires, Argentina
Ciudad de La Plata, Argentina
Ciudad de San Miguel de Tucuman, Argentina
Córdoba, Argentina