A Study to Understand How the Study Medicine (PF-06823859) Works in People With Active Idiopathic Inflammatory Myopathies [Dermatomyositis (DM) and Polymyositis (PM)] — Stella
Phase 3 — Large-scale testing across thousands of people, comparing the new treatment against current standard treatments.
(138 sites) United States
Arizona Arthritis & Rheumatology Associates, P.C., Glendale, Arizona Mayo Clinic Hospital, Phoenix, Arizona Mayo Clinic in Arizona - Scottsdale, Scottsdale, Arizona 200 UCLA Medical Plaza, Los Angeles, California UCLA Clinical & Translational Research Center (CTRC), Los Angeles, California UCLA, Los Angeles, California Center for Clinical Research - Chapman Pavilion, Orange, California UCI Douglas Hospital, Orange, California UCI Health Center for Innovative Health Therapies, Orange, California University of California - Irvine, Orange, California Mayo Clinic in Florida, Jacksonville, Florida Lal Bhagchandani, M.D, Margate, Florida University of Miami, Miami, Florida University of Miami Dermatology Clinical Trials Unit, Miami, Florida University of Miami, Miami, Florida Unviversity of Miami, Miami, Florida Omega Research Orlando, Orlando, Florida IRIS Research and Development, LLC, Plantation, Florida West Broward Pulmonary Consultants, Plantation, Florida West Broward Rheumatology Associates, Tamarac, Florida KU Clinical Research Center - Clinical and Translational Science Unit (CTSU), Fairway, Kansas KU Clinical Research Center - Clinical and Translational Science Unit (CTSU) Rainbow, Kansas City, Kansas University of Kansas Medical Center - Hoglund Brain Imaging Center, Kansas City, Kansas University of Kansas Medical Center, Kansas City, Kansas Brigham and Women's Hospital, Boston, Massachusetts CTC - Brigham & Women's Hospital, Boston, Massachusetts CTH - Brigham & Women's Hospital, Boston, Massachusetts Washington University Pulmonary Function Laboratory, St Louis, Missouri Washington University School of Medicine, St Louis, Missouri NYU Langone Health - Clinical and Translational Science Institute Research Pharmacy, New York, New York NYU Langone Health Clinical Research Center, New York, New York NYU Langone Health, New York, New York NYU Langone Radiology, New York, New York Cleveland Clinic, Cleveland, Ohio Arthritis & Rheumatology Research Institute, PLLC, Allen, Texas Integrative Rheumatology of South Texas - Harlingen, Harlingen, Texas Integrative Rheumatology of South Texas, Harlingen, Texas Nerve & Muscle Center of Texas, Houston, Texas Biopharma Informatic, LLC, Katy, Texas Pulmonary and Sleep Center of the Valley, Weslaco, Texas Rheumatology & Pulmonary Clinic, Beckley, West Virginia Argentina
Instituto de Investigaciones Clinicas Zarate, Zárate, Buenos Aires CER medical Institute, Quilmes, Buenos Aires F.D. Centro de Investigaciones Médicas Tucuman, SAN M. de Tucuman, Tucumán Province Instituto de Reumatología, Mendoza Bulgaria
Medical Center Artmed, Plovdiv Diagnostic Consultative Centre (DCC) - Foкus 5, Sofia China
Anhui Provincial Hospital, Hefei, Anhui China-Japan Friendship Hospital, Beijing, Beijing Municipality Peking Union Medical College Hospital, Beijing, Beijing Municipality Dongguan People's Hospital, Dongguan, Guangdong Guangdong Provincial People's Hospital, Guangzhou, Guangdong Guangdong Provincial People's Hospital, Guangzhou, Guangdong Cangzhou People's Hospital, Cangzhou, Hebei Xiangya Hospital Central South University, Changsha, Hunan Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Qilu Hospital of Shandong University, Jinan, Shandong France
Centre Hospitalier Universitaire de Reims - l'Hôpital Maison Blanche, Reims Hopitaux Universitaires de Strasbourg, Nouvel Hopital Civil, Strasbourg Germany
Universitaetsklinikum Erlangen, Erlangen, Bavaria Ludwig Maximilians University Munich Klinikum, München Hungary
Pécsi Tudományegyetem Klinikai Központ, Pécs, Baranya Debreceni Egyetem Klinikai Kozpont, Debrecen India
Medanta-The Medicity, Gurugram (Gurgaon), Haryana CHARM HEALTHCARE PRIVATE LIMITED (Previously Dr Shenoy's Care Private Limited), Kochi, Kerala Institute of Post Graduate Medical Education and Research and Seth Sukhlal Karnani Memorial Hospital, Kolkata, West Bengal Israel
Rabin Medical Center, Petah Tikva, Central District Sheba Medical Center, Ramat Gan, Central District Sourasky Medical Center, Tel Aviv, TELL ABĪB Italy
IRCCS Istituto Clinico Humanitas, Rozzano, Milano Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Roma, RM Azienda Ospedaliero Universitaria Policlinico G.Rodolico-San Marco Di Catania, Catania Azienda Ospedaliera Universitaria Careggi, Florence Irccs Ospedale San Raffaele, Milan Japan
Hospital of the university of occupational and environmental health, Kitakyushu-shi, Fukuoka St. Marianna University School of Medicine Hospital, Kawasaki, Kanagawa Tohoku University Hospital, Sendai, Miyagi Okayama City General Medical Center Okayama City Hospital, Okayama, Okayama-ken National Hospital Organization Osaka Minami Medical Center, Kawachi-Nagano, Osaka Shiga University of Medical Science Hospital, Ōtsu, Shiga Institute of Science Tokyo Hospital, Bunkyo-ku, Tokyo Nippon Medical School Hospital, Bunkyo-ku, Tokyo Tokyo Medical University Hospital, Shinjuku-ku, Tokyo Yamaguchi University Hospital, Ube, Yamaguchi University of Yamanashi Hospital, Chuo-shi, Yamanashi Wakayama Medical University Hospital, Wakayama Mexico
Boca Clinical Trials Mexico S.C., Guadajalara, Jalisco Centro Integral en Reumatologia, Guadalajara, Jalisco Cryptex Investigación Clínica S.A. de C.V., Cuauhtémoc, Mexico City CITER Centro de Investigación y Tratamiento de las Enfermedades Reumáticas, Mexico City, Mexico City Private Practice - Dr. Miguel Cortes, Cuernavaca, Morelos Poland
Twoja Przychodnia PCM, Poznan, Greater Poland Voivodeship Pracownia Radiologiczna WIDOK-MED, Krakow, Lesser Poland Voivodeship Małopolskie Centrum Kliniczne, Krakow, Lesser Poland Voivodeship Centrum Medyczne Plejady, Krakow, Lesser Poland Voivodeship Lux Med, Krakow, Lesser Poland Voivodeship 5 Wojskowy Szpital Kliniczny z Polikliniką SPZOZ, Krakow, Lesser Poland Voivodeship Narodowy Instytut Geriatrii, Reumatologii i Rehabilitacji, Warsaw, Masovian Voivodeship Centrum Medycyny Oddechowej Robert Mroz spolka jawna, Bialystok, Podlaskie Voivodeship INTER CLINIC Piotr Adrian Klimiuk, Bialystok, Podlaskie Voivodeship Zaklad Diagnostyki Obrazowej HEM s.c., Bialystok, Podlaskie Voivodeship Nova Reuma Domyslawska i Rusilowicz Spolka Partnerska Lekarza Reumatologa i Fizjoterapeuty, Bialystok, Podlaskie Voivodeship Slovakia
Narodny ustav reumatickych chorob, Piešťany South Korea
Chonnam National University Bitgoeul Hospital, Gwangju, Kwangju-kwangyokshi Ajou University Hospital, Suwon, Kyǒnggi-do Kyung Hee University Hospital, Seoul, Seoul-teukbyeolsi [seoul] Hanyang University Seoul Hospital, Seoul, Seoul-teukbyeolsi [seoul] Seoul National University Hospital, Seoul Spain
Hospital Universitario Infanta Leonor, Madrid, Madrid, Comunidad de Hospital Universitario de Canarias, San Cristóbal de La Laguna, Santa CRUZ DE Tenerife Hospital General Universitario Gregorio Marañon, Madrid Hospital Universitario 12 de Octubre, Madrid Sweden
Karolinska University Hospital Solna, Stockholm Taiwan
Chi Mei Medical Center, Tainan, Tainan China Medical University Hospital, Taichung Taichung Veterans General Hospital, Taichung National Taiwan University Hospital, Taipei Taipei Veterans General Hospital, Taipei Chang Gung Medical Foundation-Linkou Branch, Taoyuan District Turkey (Türkiye)
Ankara University Ibni Sina Hospital, Ankara Hacettepe Universite Hastaneleri, Ankara Memorial Ankara Hastanesi, Ankara Memorial Ankara Hastanesi, Ankara United Kingdom
Queen Elizabeth University Hospital, Glasgow, Glasgow CITY Salford Royal Hospital, Salford, Manchester Doncaster Royal Infirmary, Doncaster
Key details Enrollment target
~318 participants
Primary completion
July 2027
Age range
18 Years and older
Last updated April 2026
Interested in joining? Shanghai Jiaotong University School of Medicine, Renji Hospital, Shanghai, Shanghai Municipality
Ruijin Hospital Shanghai Jiaotong University School of Medicine, Shanghai, Shanghai Municipality Huashan Hospital, Fudan University, Shanghai, Shanghai Municipality Shanghai Jiaotong University School of Medicine, Renji Hospital, Shanghai, Shanghai Municipality West China Hospital, Sichuan University, Chengdu, Sichuan Tianjin Medical University General Hospital, Tianjin, Tianjin Municipality First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan The first Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang The first Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Dongguan People's Hospital, Dongguan