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Rezurock® (belumosudil) patient-reported outcomes correlated with clinical response in chronic graft-versus-host disease

  • Results demonstrate strong, but not universal, correlation between organ clinical responses and clinically meaningful improvements in patient-reported outcomes from a pooled analysis of ROCKstar and KD025-208 clinical trials

Paris, April 21, 2022. Results from a pooled analysis of Rezurock® (belumosudil) for the treatment of chronic graft-versus-host disease (cGVHD) show certain organ clinical responses correlated with clinically meaningful changes in patient-reported outcomes (PROs). Kadmon, a Sanofi Company, will present the results at the 2022 American Society for Transplantation and Cellular Therapy (ASTCT) and the Center for International Blood & Marrow Transplant Research (CIBMTR) Tandem Meetings in Salt Lake City, Utah.

Jonathan Ieyoub
Head of Sanofi US Rezurock Medical
“These Rezurock data reinforce the importance of patient-reported outcome measures by showing their correlation to clinical response. Knowing the impact that chronic graft-versus-host disease has on patients, the results add support for use of patient-reported outcomes to assess responses in clinical care.”

The pooled analysis of the ROCKstar (KD025-213) and KD025-208 studies demonstrates a very strong, but not universal, correlation between organ clinical response measures and clinically meaningful changes in PROs in patients treated with Rezurock. In particular, the clinically meaningful changes in PROs were reported in the skin, mouth, eye, upper GI, lung (clinical lung scale score), and overall measures. These data support use of PROs for response assessment in cGVHD clinical trials and patient care to help capture the patient’s perspective on cGVHD disease activity.

About the Pooled Analysis

The pooled analysis of clinical and PRO data included 170 (91.3%) patients enrolled in two Rezurock studies (n=132, KD025-213; n=54, KD025-208) who had baseline PROs, at least one follow-up PRO, and at least one response assessment. The median age was 54.5 years, 98 (58%) were men, the median number of prior treatments was 3, 70% had severe cGVHD, and the median duration of follow-up at the time of data cut-off was 15 months (range, 0.6-44 months).

Organ responses, defined as complete responses (CR) and partial responses (PR), were 35% (48/135) in skin, 68% (84/124) in joints, 57% (56/99) in mouth, 41% (52/128) in eyes, 73% (19/26) in upper GI, 87% (13/15) in lower GI, 23% (14/61) in lungs, and 77% (130/170) overall. For all organs except for joints, oesophagus, and lower GI there was at least one PRO that was statistically correlated at p<0.05 with National Institutes of Health (NIH) organ response. NIH clinical lung response, but not the lung response based on FEV1% change, was associated with the lung PRO.

Correlation of NIH organ response (CR+PR) with clinically meaningful patient-reported outcomes (PROs)
Organ Response measure Clinically meaningful change Patient-reported outcome Clinically meaningful change OR, 95% CI, for improvement in PRO predicting NIH response p-value
Skin NIH Skin score [0-3] 1 pt LSS skin scale [0-100] 11 pts 2.16 (1.12-4.16) 0.021
  Sclerotic skin [0-10] 2 pts LSS skin scale [0-100] 11 pts 1.66 (0.91-3.01) 0.098
  Sclerotic skin [0-10] 2 pts Skin tightening [0-10] 2 pts 2.50 (1.28-4.87) 0.007
Joint P-ROM [4-25] 2 pts LSS single item joints [0-4] 1 pt 1.49 (0.84-2.66) 0.175
  NIH joint score [0-3] 1 pt LSS single item joints [0-4] 1 pt 1.26 (0.73-2.20) 0.408
Mouth Oral mucositis rating scale 2 pts LSS mouth scale [0-100] 13 pts 6.36 (2.94-13.74) <0.0001
  Oral mucositis rating scale 2 pts Mouth sensitivity [0-10] 2 pts 4.53 (2.25-9.09) <0.0001
GI NIH esophagus score [0-3] 1 pt LSS nutrition scale [0-100] 7 pts 1.32 (0.53-3.29) 0.546
  NIH upper GI score [0-3] 1 pt LSS nutrition scale [0-100] 7 pts 4.44 (1.74-11.35) 0.002
  NIH lower GI score [0-3] 1 pt LSS nutrition scale [0-100] 7 pts 0.91 (0.27-3.05) 0.878
Eye NIH eye score [0-3] 1 pt LSS eye scale [0-100] 15 pts 3.39 (1.98-5.82) <0.0001
  NIH eye score [0-3] 1 pt Worst eye compliant [0-10] 2 pts 2.35 (1.33-4.15) 0.003
Lung FEV1% 10% LSS lung scale [0-100] 8 pts 0.90 (0.43-1.87) 0.779
  NIH lung score [0-3] 1 pt LSS lung scale [0-100] 8 pts 2.81 (1.70-4.65) <0.0001
Overall NIH responder [CR+PR] vs. nonresponder   LSS summary scale [0-100] 7 pts 1.89 (1.17-3.06) 0.010
  NIH responder [CR+PR] vs. nonresponder   Overall cGVHD [0-10] 2 pts 2.37 (1.48-3.77) <0.001
  Overall severity [0-10] 2 pts LSS summary scale [0-100] 7 pts 1.84 (1.08-3.11) 0.024
  Overall severity [0-10] 2 pts Overall cGVHD [0-10] 2 pts 3.46 (2.17-5.52) <0.0001
Pt, point; LSS, Lee symptom scale; GI, gastrointestinal; P-ROM, photographic range of motion

About cGVHD

cGVHD is a complication that can occur following allogeneic stem cell transplantation, resulting in significant morbidity and mortality. In cGVHD, transplanted immune cells (graft) attack the patient's cells (host), leading to inflammation and fibrosis in multiple tissues, including skin, mouth, eye, joints, liver, lung, oesophagus and gastrointestinal tract. Approximately 14,000 patients in the United States are living with cGVHD.

About Rezurock® (belumosudil)

Rezurock® (belumosudil) is the first and only approved therapy inhibiting Rho-associated coiled-coil kinase 2 (ROCK2). Rezurock is approved in the United States for the treatment of adult and pediatric patients 12 years and older with cGVHD after failure of at least two prior lines of systemic therapy. For more information, visit www.Rezurock.com.

About Sanofi
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