Clinical trial Recruiting at 125 sites Phase 3 Interventional Ages 18 and up

Understanding how PF-06823859 works in patients with muscle inflammation disorders

Official title: A PHASE 3, MULTICENTER, DOUBLE-BLIND, RANDOMIZED, PLACEBO-CONTROLLED STUDY TO EVALUATE THE EFFICACY AND SAFETY OF PF-06823859 IN PARTICIPANTS WITH ACTIVE IDIOPATHIC INFLAMMATORY MYOPATHIES (INCLUDING PARTICIPANTS WITH ACTIVE DERMATOMYOSITIS OR POLYMYOSITIS)

Run by Pfizer · NCT05895786 · Data updated 2026-11-12

This study is testing a new medication called PF-06823859 to see if it can help adults with muscle inflammation disorders like dermatomyositis and polymyositis feel better compared to a placebo.

More Myositis trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment318 (estimated)
SponsorPfizer
Industry-sponsored
Locations138 sites (Glendale, Arizona and 137 other locations)
StatusRecruiting
StartedMay 20, 2023
Main results expectedJuly 29, 2030
Study endsJuly 29, 2030
Registry record updatedSeptember 15, 2026
Trial IDNCT05895786 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults aged 18 and older with active dermatomyositis or polymyositis who are on stable doses of corticosteroids or immunosuppressants.

Probably not a fit

Patients with myositis due to non-idiopathic causes, inclusion body myositis, or those with significant comorbidities may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial aims to investigate the effects of the medication PF-06823859 in individuals diagnosed with active idiopathic inflammatory myopathies, specifically dermatomyositis and polymyositis. Participants must be adults aged 18 or older and currently receiving stable doses of corticosteroids or traditional immunosuppressants. The study will compare the effects of PF-06823859 against a placebo to assess its efficacy in reducing muscle inflammation and associated symptoms. The trial seeks to provide insights into the medication's mechanism of action and its potential benefits for patients suffering from these conditions.

Why it matters

Potential benefit: If successful, this study could lead to improved treatment options for patients with muscle inflammation disorders, enhancing their quality of life.

How similar studies have gone: Other studies have explored treatments for idiopathic inflammatory myopathies, but the specific approach of PF-06823859 is novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Male or female adults (≥18 years old or minimum legal adult age as defined per local regulation, whichever is greater)
* Active dermatomyositis (DM) or polymyositis (PM) with age of onset

  * 18 years old.
* Must be receiving a stable dose of standard of care (SOC) background medications at the time of enrollment.

Exclusion Criteria:

* Myositis due to non-Idiopathic inflammatory myopathies (non-IIM)
* Existing diagnosis of inclusion body myositis (IBM)
* Presence of immune-mediated necrotizing myositis (IMNM)
* Myositis with end-stage organ involvement
* Active bacterial, viral or fungal infections or hospitalizations for serious infections within 60 days prior to enrollment
* History of recurrent bacterial, viral, fungal, mycobacterial or other infections
* Clinically significant finding on a chest x-ray
* Have cancer or a history of cancer within 5 years of screening
* Significant current or prior disease conditions that may interfere with the response to or safety of the study medicine, including but not limited to:
* history of major organ transplant
* acute coronary syndrome or any history of significant cerebrovascular disease within 24 weeks of screening
* preexisting demyelinating disorder such as multiple sclerosis, or other severe neurological disorder
* major surgery within 4 weeks of screening, or scheduled to occur during the study, excluding diagnostic surgery
* previous treatment with total lymphoid irradiation
* history of any lymphoproliferative disorder such as Epstein Barr Virus, history of lymphoma, leukemia, or symptoms of current lymphatic or lymphoid disease
* Clinically significant depression, suicidal ideation, or previous history of suicidal behaviors
* Other medical or laboratory abnormality that may increase the risk of study participation
* Previous administration with an investigational product (drug or vaccine) within 30 days or of the first dose of study medicine
* Current use or incomplete appropriate washout period of any prohibited medication(s) or known exposure to anti-interferon beta (PF-06823859) or any type of anti-interferon beta therapy
* Prior SOC medication that does not fulfill the criteria
* Certain laboratory results from screening assessments that may interfere with study participation.
* Investigator site staff directly involved in the conduct of the study and their family members, site staff and sponsor and sponsor delegate employees directly involved in the conduct of the study and their family members

Where it's running

  • Arizona Arthritis & Rheumatology Research, PLLC
    Glendale, Arizona, United States
    Recruiting
  • Neuromuscular Research Center
    Phoenix, Arizona, United States
    Recruiting
  • Mayo Clinic Hospital
    Phoenix, Arizona, United States
    Recruiting
  • Mayo Clinic in Arizona - Scottsdale
    Scottsdale, Arizona, United States
    Recruiting
  • 200 UCLA Medical Plaza
    Los Angeles, California, United States
    Recruiting
  • UCLA Clinical & Translational Research Center (CTRC)
    Los Angeles, California, United States
    Recruiting
Show 44 more locations
  • UCLA
    Los Angeles, California, United States
    Recruiting
  • Samir Macwan, M.D., Inc.
    Rancho Mirage, California, United States
    Recruiting
  • Mayo Clinic in Florida
    Jacksonville, Florida, United States
    Recruiting
  • University of Miami
    Miami, Florida, United States
    Recruiting
  • University of Miami Dermatology Clinical Trials Unit
    Miami, Florida, United States
    Recruiting
  • University of Miami
    Miami, Florida, United States
    Recruiting
  • Unviversity of Miami
    Miami, Florida, United States
    Recruiting
  • IRIS Research and Development, LLC
    Plantation, Florida, United States
    Recruiting
  • West Broward Pulmonary Consultants
    Plantation, Florida, United States
    Recruiting
  • Brigham and Women's Hospital
    Boston, Massachusetts, United States
    Recruiting
  • CTC - Brigham & Women's Hospital
    Boston, Massachusetts, United States
    Recruiting
  • CTH - Brigham & Women's Hospital
    Boston, Massachusetts, United States
    Recruiting
  • NYU Langone Health - Clinical and Translational Science Institute Research Pharmacy
    New York, New York, United States
    Recruiting
  • NYU Langone Health Clinical Research Center
    New York, New York, United States
    Recruiting
  • NYU Langone Health
    New York, New York, United States
    Recruiting
  • NYU Langone Radiology
    New York, New York, United States
    Recruiting
  • Cleveland Clinic
    Cleveland, Ohio, United States
    Recruiting
  • RAO Research LLC
    Oklahoma City, Oklahoma, United States
    Recruiting
  • UPMC Arthritis and Autoimmunity Center, Falk Clinic
    Pittsburgh, Pennsylvania, United States
    Recruiting
  • UPMC Montefiore Clinical and Translational Research Center (CTRC)
    Pittsburgh, Pennsylvania, United States
    Recruiting
  • UPMC Presbyterian Shadyside Hospital
    Pittsburgh, Pennsylvania, United States
    Recruiting
  • Integrative Rheumatology of South Texas
    Edinburg, Texas, United States
    Recruiting
  • Arthritis & Rheumatology Research Institute, PLLC
    Frisco, Texas, United States
    Recruiting
  • Integrative Rheumatology of South Texas
    Harlingen, Texas, United States
    Recruiting
  • Nerve & Muscle Center of Texas
    Houston, Texas, United States
    Recruiting
  • Biopharma Informatic, LLC
    Katy, Texas, United States
    Recruiting
  • Pulmonary and Sleep Center of the Valley
    Weslaco, Texas, United States
    Recruiting
  • CER medical Institute
    Quilmes, Buenos Aires F.D., Argentina
    Recruiting
  • Alto Dorrego
    Villa Nueva, Mendoza Province, Argentina
    Recruiting
  • Centro de Investigaciones Médicas Tucuman
    SAN M. de Tucuman, Tucumán Province, Argentina
    Recruiting
  • Instituto de Reumatología Medical Center S.A.
    Mendoza, Argentina
    Recruiting
  • Diagnostic Consultative Center - Fokus-5 - Medical Establishment for Outpatient Care OOD
    Sofia, Sofia (stolitsa), Bulgaria
    Recruiting
  • Medical Center Artmed
    Plovdiv, Bulgaria
    Recruiting
  • Anhui Provincial Hospital
    Hefei, Anhui, China
    Recruiting
  • China-Japan Friendship Hospital
    Beijing, Beijing Municipality, China
    Recruiting
  • Peking Union Medical College Hospital
    Beijing, Beijing Municipality, China
    Recruiting
  • Dongguan People's Hospital
    Dongguan, Guangdong, China
    Recruiting
  • Guangdong Provincial People's Hospital
    Guangzhou, Guangdong, China
    Recruiting
  • Xiangya Hospital Central South University
    Changsha, Hunan, China
    Recruiting
  • Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School
    Nanjing, Jiangsu, China
    Recruiting
  • The Second Affiliated Hospital of Nanchang University
    Nanchang, Jiangxi, China
    Recruiting
  • The Second Affiliated Hospital of Nanchang University
    Nanchang, Jiangxi, China
    Recruiting
  • Shanghai Jiaotong University School of Medicine, Renji Hospital
    Shanghai, Shanghai Municipality, China
    Recruiting
  • Ruijin Hospital Shanghai Jiaotong University School of Medicine
    Shanghai, Shanghai Municipality, China
    Recruiting

+88 more sites. See ClinicalTrials.gov for the full list.

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
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Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.