A Study of Ustekinumab in Participants With Active Polymyositis and Dermatomyositis Who Have Not Adequately Responded to One or More Standard-of-care Treatments
Polymyositis, Dermatomyositis
About this trial
This is an interventional treatment trial for Polymyositis
Eligibility Criteria
Inclusion Criteria:
- Has a diagnosis of polymyositis (PM)/ dermatomyositis (DM) made or confirmed by a physician (such as a rheumatologist, neurologist, or dermatologist) experienced in treatment of PM/DM at least 6 weeks prior to first dose of the study drug
- Has PM or DM which is considered active despite receiving at least 1 standard-of-care treatment by the investigator
- Must be receiving 1 or more of the following protocol-permitted, systemic standard-of-care treatments: i) glucocorticoids, ii) 1 or 2 of the following immunomodulatory drugs: mycophenolate mofetil, azathioprine, oral methotrexate, oral tacrolimus, or oral cyclosporine A
- Regular or as needed treatment with topical use of glucocorticoids are permitted to treat skin lesions on a stable dose for greater than or equal to (>=) 2 weeks prior to first dose of the study drug
- Contraceptive (birth control) use by men or women should be consistent with local regulations regarding the acceptable methods of contraception for those participating in clinical studies
- Must be medically stable on the basis of clinical laboratory tests performed at screening. If the results of the clinical laboratory tests are outside the normal reference ranges, the participant may be included only if the investigator judges the abnormalities or deviations from normal to be not clinically significant
- Demonstrable muscle weakness at screening and Week 0 measured by the Manual Muscle Testing (MMT)-8 less than or equal to (<=)135 units
- Demonstrable muscle weakness at screening measured by any 2 or more of the followings: (i) PhGA greater than or equal to (>=) 1.5 centimeter (cm), (ii) 1 or more muscle enzymes (Creatine kinase [CK], and aldolase) >=1.4*upper limit of normal (ULN), (iii) Myositis disease activity assessment tool (MDAAT)-Extramuscular Global Assessment >=1.5 cm
Exclusion Criteria:
- Has myositis other than PM/DM, including but not limited to amyopathic dermatomyositis (ADM), clinically amyopathic DM, juvenile DM, inclusion body myositis (IBM) immune-mediated necrotizing myopathy diagnosed based on muscle biopsy findings and positive anti-SRP or anti-HMGCR antibody, drug-induced myositis, PM associated with human immunodeficiency virus (HIV), and muscular dystrophy, congenital myopathy, metabolic myopathy, and mitochondrial myopathy
- Has other inflammatory diseases that might confound the evaluations of efficacy, including but not limited to rheumatoid arthritis (RA), psoriatic arthritis (PsA), systemic lupus erythematosus (SLE), psoriasis, or Crohn's disease
- Has severe respiratory muscle weakness confirmed by the investigator based on the consultation with a pulmonologist and the measures of respiratory muscle strength such as maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) and/or maximal voluntary ventilation (MVV) measurements and lung capacity such as forced vital capacity (FVC). The results need to be within population appropriate normal limits
- Has severe muscle damage (Myositis Damage Index-VAS [Muscle Damage] greater than (>) 7 centimeter [cm]), permanent weakness due to a non-IIM cause, or myositis with cardiac dysfunction
- Has glucocorticoid-induced myopathy which the investigator considers the primary cause of muscle weakness
- Has positive test result of anti-melanoma differentiation-associated protein 5 (MDA5) antibody (anti clinically amyopathic dermatomyositis (C-ADM)-140 antibody).
- Has had a nontuberculous mycobacterial infection or opportunistic infection
- Has a history of, or ongoing, chronic or recurrent infectious disease
- Has past history of severe Interstitial lung disease (ILD) flare, severe non-infectious lung inflammation which required active intervention, or multiple relapses of these conditions
- Presence or history of malignancy within 5 years before screening
Sites / Locations
- Tokyo Medical and Dental University Hospital
- Fukushima Medical University Hospital
- Shinko Hospital
- Tokai University Hospital
- Kagoshima University Hospital
- St.Marianna University Hospital
- National Hospital Organization Osaka Minami Medical Center
- Hospital of the University of Occupational and Enviromental Health
- Kumamoto University Hospital
- Kurashiki Central Hospital
- Shinshu University Hospital
- Minaminagano Medical Center Shinonoi General Hospital
- Nagasaki University Hospital
- National Hospital Organization Nagoya Medical Center
- Niigata University Medical & Dental Hospital
- Okayama City General Medical Center Okayama City Hospital
- Kitasato University Hospital
- Saga University Hospital
- Sakai City Medical Center
- Tohoku University Hospital
- Tohoku Medical And Pharmaceutical University Hospital
- Dokkyo Medical University Hospital
- The Jikei University Hospital
- Juntendo University Hospital
- Nippon Medical School Hospital
- Tokyo Medical University Hospital
- National Center for Global Health and Medicine
- Ehime University Hospital
- Fujita Health University Hospital
- University of Tsukuba Hospital
- Yamaguchi University Hospital
- Yokohama Rosai Hospital
Arms of the Study
Arm 1
Arm 2
Experimental
Placebo Comparator
Group 1: Ustekinumab + Placebo
Group 2: Placebo + Ustekinumab
Participants will receive body weight-range based IV dosing of approximately 6 milligram per kilogram (mg/kg) of ustekinumab at Week 0 followed by ustekinumab 90 milligram (mg) subcutaneously (SC) at Week 8 and every 8 Weeks (q8w) administrations through Week 72. At Week 24, participants will receive IV dosing of placebo.
Participants will receive IV dosing of placebo at Week 0 followed by placebo SC administrations at Weeks 8,16 and 24. At Week 24, participants will receive body weight-range based IV dosing of approximately 6 mg/kg of ustekinumab, followed by ustekinumab 90 mg SC q8w administrations Week 32 through Week 72.