Ruxolitinib for people with inclusion body myositis
Official title: Blocking Interferon-γ by Ruxolitinib for Treating Inclusion Body Myositis: a Phase IIb Trial
Run by Assistance Publique - Hôpitaux de Paris · NCT06536166 · Data updated 2026-11-12
This trial will test whether ruxolitinib can help improve walking distance, muscle strength, and breathing in adults 45 and older with inclusion body myositis.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 45 Years and up |
| Sex | All |
| Enrollment | 80 (estimated) |
| Sponsor | Assistance Publique - Hôpitaux de Paris Academic / other |
| Drugs / interventions | ruxolitinib |
| Locations | 21 sites (Angers, France and 20 other locations) |
| Status | Recruiting |
| Started | May 27, 2025 |
| Main results expected | June 10, 2028 |
| Study ends | September 10, 2028 |
| Registry record updated | May 29, 2026 |
| Trial ID | NCT06536166 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults aged 45 or older with biopsy-confirmed inclusion body myositis who can walk for at least six minutes (with or without assistive devices) and can give informed consent are ideal candidates.
✕Probably not a fit
People who are non-ambulatory, pregnant or breastfeeding, have significant cognitive impairment, or do not meet the biopsy-based diagnostic criteria are unlikely to benefit from participation.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a randomized, double-blind, placebo-controlled Phase 2 trial enrolling 60 participants with biopsy-proven inclusion body myositis who can walk for at least six minutes. Participants are randomized 1:1 to receive ruxolitinib 15 mg twice daily or placebo for 12 months, with regular clinic visits. Outcomes include the 6-minute walk test, quantitative muscle strength, functional scales, respiratory function tests, and muscle MRI. The trial is based on preclinical data showing a strong IFNγ/JAK-STAT signature in IBM muscle and that JAK inhibition can prevent IFNγ-related muscle suppression in models.
Why it matters
Potential benefit: If successful, ruxolitinib could slow muscle decline and improve mobility, strength, and quality of life for people with IBM.
How similar studies have gone: Preclinical studies and some early reports support JAK inhibition in IBM, but large randomized controlled evidence in IBM is currently limited, making this approach relatively novel in this disease.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Age ≥ 45 years * Effective contraception for the duration of the clinical trial for fertile women of childbearing age * Defined diagnosis of IBM according to data-derived criteria (Llyod et al, 2014): Patient must fulfill the three following criteria for being diagnosed as IBM: (1) finger flexor or quadriceps weakness; and (2) muscle biopsy showing endomysial inflammation; and (3) muscle biopsy showing invasion of nonnecrotic muscle fibers or rimmed vacuoles * To be able to walk 6 min without assistance from another person (external assist devices permitted \[e.g., canes, walkers, or rollators\]) * Patient informed and having signed the consent for participation, possibly assisted by a trusted person Exclusion Criteria: * Pregnancy or breastfeeding * Patient under guardianship, curatorship, safeguard of justice or deprived of liberty * Patient with cognitive disorders or unable, according to the investigator, to understand the study and/or to give informed consent * Quadriceps weakness (manual muscle testing, MRC) below or equal 1 * Forced vital capacity (FVC) or forced expiratory volume (FEV) \< 50% of predicted value * Concomitant use of immunomodulatory drugs including previous treatment with JAK inhibitor, or medications acting on muscle anabolism or catabolism * Live vaccine within the 4 weeks before starting treatment * Comorbidity or active chronic disease which contraindicate ruxolitinib: * Lipid parameters abnormalities/elevations * Severe renal impairment (stage 4) and end-stage renal disease (stage 5) * Hepatic impairment * Cytopenia * Recent history (\<6 months) of cardiovascular or thromboembolic disease (documented coronaropathy or hospitalization for acute arterial thrombosis or stroke or deep venous thrombosis or pulmonary embolism) * Active smoking more than 20 pack-years or history of respiratory or skin cancer or recent history (\<6 months) of other neoplastic disease * Very high cardiovascular risk (red color) at SCORE 2 in case of recent history (\<6 months) of cardiovascular or thromboembolic disease and non-controlled cardiovascular risk factors * History of Stevens-Johnson's syndrome or Lyell's syndrome * Active SARS-CoV-2 infection (patient can be included once infection resolved) * Any medical condition which limits the ability of participant to participate in study * Necessity to use a drug incompatible with ruxolitinib * Hypersensitivity to the IMP's active substance (ruxolitinib) or to any of the excipients * Non-affiliation to a social security scheme or to another social protection scheme, patient on state medical aid * Foreseeable inability, according to the investigator, to participate in all the visits, treatments and measures provided for in the protocol * Concomitant participation in another clinical trial on medical product for human use, to a clinical investigation on a medical device, to interventional study involving human participants or in the exclusion period at the end of a previous clinical trial on medical product for human use, a clinical investigation on a medical device, or study involving human participants. Participation in non-interventional research is permitted.
Where it's running
-
CHU Caen Normandie
Caen, France, France Recruiting -
Hôpital Henri-Mondor, APHP
Créteil, France, France Recruiting -
Hôpital Roger Salengro, CHU de Lille
Lille, France, France Recruiting -
Hôpital Dupuytren, CHU de Limoges
Limoges, France, France Recruiting -
CHU Nancy
Nancy, France, France Recruiting -
Hôpital Pasteur, CHU de Nice
Nice, France, France Recruiting
Show 15 more locations
-
Hôpital Pitié-Salpêtrière, APHP
Paris, France, France Recruiting -
Hôpital Christian Cabrol, CHU Reims
Reims, France, France Recruiting -
Hôpital Bellevue, CHU Saint-Etienne
Saint-Etienne, France, France Recruiting -
Hôpital Pierre-Paul Riquet, CHU de Toulouse
Toulouse, France, France Recruiting -
CHU d'Angers
Angers, France, France Enrolling by invitation -
Centre hospitalier de la Côte Basque
Bayonne, France, France Enrolling by invitation -
Hôpital CHU Jean Minjoz, CHU Besançon
Besançon, France, France Enrolling by invitation -
Hôpital Pellegrin - Tripode, CHU de Bordeaux
Bordeaux, France, France Active not recruiting -
Hôpital de la Cavale Blanche, CHU de Brest
Brest, France, France Enrolling by invitation -
Hôpital Pierre Wertheimer, CHU de Lyon
Bron, France, France Active not recruiting -
Hôpital Raymond Poincaré, APHP
Garches, France, France Active not recruiting -
Hôpital de la Timone, APHM
Marseille, France, France Not yet recruiting -
Hôpital Gui de Chauliac, CHU de Montpellier
Montpellier, France, France Enrolling by invitation -
Hôtel-Dieu, CHU Nantes
Nantes, France, France Active not recruiting -
Hôpital de Hautepierre, Hôpitaux Universitaires de Strasbourg
Strasbourg, France, France Active not recruiting
Study contacts
- Study coordinator: François Jérôme AUTHIER, Pr
- Email: francois-jerome.authier@aphp.fr
- Phone: +33 1 4981 2735
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.