Who Is Eligible for Myositis Clinical Trials?
Myositis trials enroll across the four major subtypes: dermatomyositis (DM), polymyositis (PM), immune-mediated necrotizing myopathy (IMNM), and inclusion body myositis (IBM). Most trials use the 2017 EULAR/ACR classification criteria. Active disease is typically defined by elevated CK, proximal muscle weakness, and/or active skin disease in DM. Myositis-specific and myositis-associated antibodies (MSAs and MAAs) are increasingly used for trial stratification.
- Confirmed inflammatory myositis per 2017 EULAR/ACR criteria
- Subtype-specific trials: DM, PM, IMNM, or IBM depending on study
- Active disease: elevated CK, proximal muscle weakness, or active DM skin findings
- MSA/MAA testing (anti-Jo-1, anti-MDA5, anti-NXP2, etc.) for stratification in many trials
- ILD trials: HRCT-confirmed myositis-ILD with spirometry within a specified range
What Treatments Are Being Tested?
| Drug Class | How It Works | Who It Is For |
|---|---|---|
| Type I interferon pathway inhibitors | Block the interferon signature overactive in DM โ anifrolumab and similar agents | Dermatomyositis with positive interferon signature |
| IL-6 inhibitors | Target IL-6 driving muscle inflammation and systemic features | Active DM/PM with elevated inflammatory markers |
| JAK inhibitors | Oral agents showing promising results in refractory DM and DM-ILD | DM and DM-ILD, often refractory to standard therapy |
| Anti-FcRn agents | Block IgG recycling, reducing pathogenic autoantibody levels rapidly | IMNM and MDA5-positive DM with ILD |
| IVIG and IVIG alternatives | High-dose immunoglobulin for acute muscle disease โ newer SC formulations in trials | Active DM/PM/IMNM with significant weakness |
What to Expect as a Trial Participant
Myositis trials measure muscle strength using manual muscle testing (MMT8), CK levels, and patient-reported function. DM trials also assess skin disease using the CDASI. ILD trials include pulmonary function tests and HRCT.
- Screening: MMT8, CK and aldolase, MSA/MAA antibody panel, HRCT if ILD suspected, skin assessment in DM
- Baseline: Randomization โ most trials are double-blind
- Treatment visits: Every 4-8 weeks with muscle assessments and labs
- Pulmonary monitoring: FVC and DLCO at regular intervals if ILD present
- Compensation: Most sites pay $75-$250 per visit
Frequently Asked Questions
Other Rheumatology Trials
Trial data sourced live from ClinicalTrials.gov. Content reviewed by Mahiar Rabie, MS, MD. This page is for informational purposes only and does not constitute medical advice. Eligibility for any specific trial must be confirmed with the trial coordinator.