Last Update: Jan 22, 2026
A Phase 2, Randomized, Open-label, Controlled Study to Evaluate the Efficacy and Safety of Rapcabtagene Autoleucel Versus Comparator in Participants With Severe Refractory Idiopathic Inflammatory Myopathies (IIM)
ClinicalTrials.gov Identifier:
Novartis Reference Number:CYTB323L12201
All compounds are either investigational or being studied for (a) new use(s). Efficacy and safety have not been established. There is no guarantee that they will become commercially available for the use(s) under investigation.

Study Description

A Phase 2, randomized, open-label, controlled study to evaluate the efficacy and safety of rapcabtagene autoleucel versus comparator in participants with severe refractory idiopathic inflammatory myopathies (IIM) This is a Phase 2, randomized, active-controlled study. This study comprises two cohorts:

* A lead-in cohort enrolling participants to receive rapcabtagene autoleucel
* A randomized cohort with participants receiving either rapcabtagene autoleucel or a comparator option.

Participants in the comparator arm whose signs and symptoms are not fully controlled may receive rapcabtagene autoleucel treatment once the participant is confirmed to be eligible

After end of study (EOS), participants who received rapcabtagene autoleucel infusion will enter a long-term follow-up (LTFU) period after rapcabtagene autoleucel infusion. This LTFU will be described in a separate study protocol.

Idiopathic Inflammatory Myopathies
Phase2
Recruiting
123
Dec 17, 2024
Jul 17, 2030
All
18 Years - 75 Years (Adult, Older Adult)

Interventions

Other

Active Comparator Option

Investigator choice of treatment as per protocol
Biological

Rapcabtagene autoleucel

Single infusion of rapcabtagene autoleucel after lymphodepleting therapy with fludarabine (adjusted based on renal impairment) and cyclophosphamide daily for 3 days.

Eligibility Criteria

Key Inclusion Criteria:

1. Men and women, aged ≥ 18 and ≤75 years, with a diagnosis of probable or definite myositis according to American College of Rheumatology/European League Against Rheumatism 2017 (ACR/EULAR 2017) criteria
2. Participants who had inadequate response to prior therapy
3. Diagnosed with active disease
4. Participant must meet criteria for severe myositis

Key Exclusion Criteria:

1. Any condition during Screening that could prevent a complete washout of medications or could otherwise make the participant ineligible for anti-CD19 CAR-T therapy and further participation in the study
2. BMI at Screening of ≤17 or ≥40 kg/m2
3. Severe muscle damage at Screening
4. Inadequate organ function
5. Hypersensitivity and/or contraindications to any product (including its ingredients) to be given to the participant as per the study protocol
6. Other inflammatory and non-inflammatory myopathies
7. Any medical conditions that are not related to IIM that would jeopardize the ability of the participant to tolerate CD19 CAR-T cell therapy

Other protocol-defined inclusion/exclusion criteria may apply.

Novartis Investigative Site

Recruiting

Rennes,35033,France

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Lyon,69003,France

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Brest,29200,France

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Paris,75013,France

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Hamburg,20246,Germany

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Cologne,North Rhine-Westphalia,50937,Germany

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Jena,Thuringia,07740,Germany

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Aachen,52074,Germany

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Leipzig,Saxony,04103,Germany

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Mainz,55131,Germany

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Nuremberg,90419,Germany

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Ulm,89081,Germany

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Ramat Gan,5265601,Israel

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Tel Aviv,6423906,Israel

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Haifa,3109601,Israel

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Monza,MB,20900,Italy

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Brescia,BS,25123,Italy

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Milan,MI,20122,Italy

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Sapporo,Hokkaido,0608648,Japan

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Kanazawa,Ishikawa-ken,920 8641,Japan

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Yokohama,Kanagawa-ku,236-0004,Japan

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Sendai,Miyagi,9808574,Japan

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Bunkyo-ku,Tokyo,113-8603,Japan

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Bunkyo-ku,Tokyo,1138519,Japan

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Shinjuku-ku,Tokyo,1608582,Japan

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Fukuoka,8128582,Japan

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Kyoto,6068507,Japan

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Izumo,Shimane,693 8501,Japan

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Suita,Osaka,565 0871,Japan

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Amsterdam,North Holland,1105 az,Netherlands

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Singapore,119074,Singapore

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Singapore,169608,Singapore

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Singapore,S308433,Singapore

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Santiago Compostela,A Coruna,15706,Spain

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Salamanca,37007,Spain

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Málaga,29010,Spain

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Madrid,28041,Spain

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Pamplona,Navarre,31008,Spain

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Córdoba,14004,Spain

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Barcelona,08035,Spain

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Taipei,10002,Taiwan

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Taichung,407219,Taiwan

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Kaohsiung City,83301,Taiwan

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Sheffield,South Yorkshire,S10 2jf,United Kingdom

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London,Nw1 2bu,United Kingdom

FL Medical Clinic Orlando Health

Recruiting

Zephyrhills,Florida,33542,United States

Julio Gonzalez-Paoli
William Daily Johnston

University Of Iowa

Recruiting

Iowa City,Iowa,52242,United States

Darby Donovan
Hanna Zembrzuska

University Of Alabama

Recruiting

Birmingham,Alabama,35294,United States

James Andrews
Hannah Howell

LDS Hospital

Recruiting

Salt Lake City,Utah,84143,United States

Tara Sou
Dany Saad

Northwestern University

Recruiting

Chicago,Illinois,60611,United States

Matthew Selle
Matthew Selle
George Georges

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