A Study to Investigate the Efficacy and Safety of Belumosudil Compared With Best Available Therapy in Participants Aged 12 Years or Older With Chronic Graft-versus-host Disease

NCT07771439 | Not Yet Recruiting Phase 3 DMC FDA Drug

• 2 other identifiers: EFC229652026-525913-30
• Study Type: interventional
• Target: 356
• Locations: 0 countries
• Sites: N/A

Brief Summary

Participants will be randomized 1:1 to receive either belumosudil or Best Available Therapy (BAT), with stratification based on baseline cGVHD severity as defined by the 2014◦NIH consensus criteria (moderate versus severe), use of concomitant CS and/or CNI (ie, tacrolimus or cyclosporine) at baseline (Yes versus No), and the number of prior lines of therapies (2 versus more than 2). While treatment practices for cGVHD differ across regions, ruxolitinib has been approved by the European Commission since May 2022 and is expected to be broadly accessible throughout most EU member states by study initiation. The study will target patients post-ruxolitinib treatment, except where Investigators deemed ruxolitinib treatment for cGVHD not suitable. In the BAT arm, the study doctor will select one BAT based on clinical judgement, local availability etc. prior to randomization. Participants randomized to the BAT arm will have the option to cross-over to open-label belumosudil treatment upon meeting predefined criteria. Study details include:

• The study duration will be defined as 3 years from LPI.
• Individual participant duration on study will consist of:
• Up to 28 days for screening.
• Treatment until clinically significant progression of cGVHD, relapse/recurrence of the underlying disease, start of a new systemic treatment for cGVHD (except change from BAT to belumosudil during the cross-over), experience of an unacceptable adverse event, request from participant or Investigator, or until the end of the study is reached, whichever comes first.
• Thirty days of post treatment safety follow-up.
• Follow-up for cGVHD status as applicable.
• Long-term follow-up until death or end of study, whichever occurs first.

Conditions

Chronic Graft Versus Host Disease

Outcome Measures

Primary Outcomes (1)

• Overall response rate

  Overall response rate at 24 weeks defined as the proportion of participants who achieve an overall response (PR or CR) without the requirement of new systemic therapy as per NIH consensus response criteria (2014) at Week 24.

  at week 24

Secondary Outcomes (17)

• Time from the date of randomization to the date of start of new systemic treatment for cGVHD, relapse or recurrence of underlying disease, or death, whichever occurs first.

  Until the end of study, up to approximately 3 years from Last Participant In

• Proportion of participants achieving at least 6-point reduction from baseline in the modified Lee cGVHD Symptom Scale score at Week 24.

  at 24 week

• Proportion of participants who achieve an overall response (CR or PR) within up to 24 weeks and without the requirement of new systemic therapy as per NIH consensus response criteria (2014).

  up to 24 weeks

• Proportion of participants who achieve an overall response (CR or PR) based on NIH consensus response criteria (2014) at any time until start of new systemic therapy for cGVHD.

  Until the end of study, up to approximately 3 years from Last Participant In

• The time from first response of PR or CR until documented progression, new systemic treatment for cGVHD, or death, whichever occurs first.

  Until the end of study, up to approximately 3 years from Last Participant In

Study Arms (2)

Belumosudil

EXPERIMENTAL

Participants will receive belumosudil

Drug: Belumosudil

best available therapy(BAT)

OTHER

Participants will receive BAT based on the Investigator's judgment

Other: Best available therapy (BAT)

Interventions

Belumosudil DRUG

Pharmaceutical form:Tablet-Route of administration:oral

Also known as: SAR445761

Belumosudil

Best available therapy (BAT) OTHER

Participants will receive BAT based on the Investigator's judgment

best available therapy(BAT)

Eligibility Criteria

• Age: 12 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

• Participant must be at least 12 years of age at the time of signing the informed consent.
• Participants who have undergone allo-HCT.
• Participants with active moderate to severe cGVHD at the time of enrollment, defined using the NIH Consensus diagnosis and staging criteria for which the physician believes a new line of systemic therapy is required.
• Participant receiving systemic CNI and/or CS must be on a stable dose/regimen (prednisone equivalent \<1 mg/kg/day for CS) for at least 2 weeks prior to randomization.
• cGVHD is refractory to, or has recurred following, at least 2 prior lines of systemic treatment. Participants must have received a minimum of 2 and a maximum of 5 prior systemic therapies for cGVHD.
• Participant must have received ruxolitinib for the treatment of cGVHD unless the Investigator believes treatment with ruxolitinib for cGVHD was not suitable for the participant.
• Participants and/or their LAR must accept to be treated with 1 of the following BAT options as recommended to them by the Investigator on Cycle 1 Day 1:
• ECP,
• Low-dose MTX,
• MMF,
• Rituximab,
• mTOR inhibitors (sirolimus, everolimus)
• Imatinib,
• Ibrutinib,
• Proteasome inhibitors,

You may not qualify if:

• Any evidence (histologic, cytogenetic, molecular, hematologic, or mixed) of progressive or relapsed underlying disease or post-transplant lymphoproliferative disease after most recent allo-HCT.
• Participants who meet any of the following criteria regarding systemic cGVHD treatments:
• Participants who newly initiated any systemic cGVHD treatment within 14 days prior to the date of randomization.
• Participants receiving systemic ruxolitinib treatment who are unable to meet the following requirements:
• Ruxolitinib must be tapered and discontinued within 14 days following the first dose of belumosudil or BAT (allowing for a maximum overlap period of up to 14 days with belumosudil or BAT treatment).
• No dose increases of ruxolitinib are permitted from 14 days prior to the date of randomization until permanent discontinuation of ruxolitinib (dose reductions and discontinuations are permitted during this period).
• Participants receiving other systemic cGVHD treatment (apart from CS and CNI) including investigational treatments who have not completed a washout period of at least 14 days or 5 half-lives (whichever is shorter) prior to the first dose of belumosudil or BAT treatment.
• Note: Topical and organ-specific treatment for cGVHD and other supportive agents are allowed.
• Participant has had previous exposure to belumosudil.
• Participants with a Karnofsky Performance Scale (KPS) score \<60 (if aged ≥16 years) or Lansky Performance Score of \<60 (if aged \<16 years).
• Clinically uncontrolled chronic or ongoing infectious disease requiring antibiotic, antiviral, or antifungal treatment within 14 days prior to the date of randomization.
• Impairment of GI function (unrelated to cGVHD) or GI disease (unrelated to cGVHD) that may significantly alter the absorption of belumosudil (such as ulcerative disease, malabsorption syndrome, uncontrolled nausea, vomiting, diarrhea, or small bowel resection).
• Administration of live or live-attenuated vaccines is prohibited within 28 days or 5 elimination half-lives of the respective vaccine, whichever is longer, prior to study treatment administration and until study intervention discontinuation.
• Has a forced expiratory volume in the first second (FEV1) ≤39% or has lung score of 3 according to 2014 NIH consensus diagnostic and staging criteria.
• Has any of the following lab results:

Sponsors & Collaborators

• Sanofi: lead

Related Links

• For EU sites click here and navigate to 'Locations and contact points'

MeSH Terms

Conditions

Bronchiolitis Obliterans Syndrome

Interventions

belumosudil

Condition Hierarchy (Ancestors)

Organizing Pneumonia; Bronchiolitis Obliterans; Bronchiolitis; Bronchitis; Bronchial Diseases; Respiratory Tract Diseases; Lung Diseases, Obstructive; Lung Diseases; Graft vs Host Disease; Immune System Diseases

Central Study Contacts

Trial Transparency email recommended (Toll free for US & Canada)

CONTACT

800-633-1610; Contact-US@sanofi.com

Study Design

• Study Type: interventional
• Phase: phase 3
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: INDUSTRY
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: August 4, 2026
• First Posted: August 18, 2026
• Study Start: September 7, 2026
• Primary Completion (Estimated): September 14, 2029
• Study Completion (Estimated): March 2, 2032
• Last Updated: September 15, 2026

Record last verified: 2026-09

Data Sharing

• IPD Sharing: Will share