The ROCKstar (KD025-213) study

Clinically meaningfula responses with REZUROCK were seen across all patient types after failure of ≥2 prior lines of therapy1,2

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Clinically meaningfula and statistically significantb ORRc in a real-world demographicd of patients1,2

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Clinically meaningfula ORRs observed across key subgroups2

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Responses across all evaluated organs, including those with fibrotic manifestations2

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Most responses were seen between 4 and 8 weeks3

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FFSe rate at 6 and 12 months and OSf rate at 24 months2,3

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Exploratory analyses of LSSg summary score showed clinically meaningful improvements (≥7-point reduction) in patient-reported QOL1

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Reduction in use of CS and CNI therapies2,3,h

aClinically meaningful was defined as a ≥30% ORR.2
bStatistical significance was achieved if the lower bound of the 95% CI of ORR exceeded 30%.2
cProportion of patients who achieved CR or PR according to the 2014 NIH cGVHD Consensus Criteria.1
dROCKstar study select baseline patient characteristics (200-mg once-daily arm): median age of 53 years (range, 21-77); male, n=42 (64%); median of 3 prior lines of systemic therapy; median of 25 months (range, 2-162) from cGVHD diagnosis to enrollment; median prednisone-equivalent dose at enrollment of 0.20 mg/kg/d (range, 0.03-0.95); concomitant PPI use, n=33 (50%); ≥4 organs involved, n=33 (50%); previous aGVHD, n=42 (64%); refractory to prior line of systemic therapy, n=44 (79%)i; NIH-defined disease severity: n=46 (70%) severe, n=18 (27%) moderate, n=2 (3%) mild. Prior systemic therapies included corticosteroids (prednisone), n=65 (99%); tacrolimus, n=40 (61%); ECP, n=31 (47%); ibrutinib, n=22 (33%); and ruxolitinib, n=20 (30%).2,3
eFFS was defined as the absence of relapse, nonrelapse mortality or a need for additional systemic therapy.2
fOS was defined as the time from the first dose of REZUROCK to the date of death due to any cause.3
gThe LSS is a 30-item, 7-subscale symptom scale and QOL measurement tool that evaluates the AEs of cGVHD in the categories of skin, vitality, lung, nutritional status, psychological functioning, eye and mouth.4
hThe final FDA interpretation of the ROCKstar study omitted 1 patient from the REZUROCK 200-mg once-daily arm. As a result, there are minor differences between the ROCKstar publication, where n=66, and the Prescribing Information, where n=65.
iDenominator excludes patients with unknown status.1

STATISTICALLY SIGNIFICANT ORRc FOLLOWING TREATMENT WITH REZUROCK 200 mg ONCE DAILY1,2,5

Bar graph of overall response rate (ORR), 75% with REZUROCK 200 mg once daily (n=65). 95% CI, 63-85; P<.0001 with statistical significance indicated at 30% response.

CR, n=4 (6%). PR, n=45 (69%).1

bStatistical significance was achieved if the lower bound of the 95% CI of ORR exceeded 30%.2
cProportion of patients who achieved CR or PR according to the 2014 NIH cGVHD Consensus Criteria.1
jBased on a final analysis by the FDA as seen through cycle 7 day 1 (n=65).1

CLINICALLY MEANINGFULa ORRs OBSERVED ACROSS KEY SUBGROUPS IN THE 200-mg ONCE-DAILY ARM3

Blue icon that states early cGVHD diagnosis 89% defined as less than 28 months from initial diagnosis (n/N=32/36)
Blue icon that states severe cGVHD 76% (n/N=35/46)
Blue icon that states cGVHD involving greater than or equal to 4 organs 73% (n/N=24/33)
Blue icon that states greater than 3 prior lines of systemic therapy 70% (n/N=21/30)
Blue icon that states refractory to their prior line of systemic therapy 75% (n/N=9/12)
Blue icon that states prior ibrutinib therapy 73% (n/N=16/22)
Blue icon that states prior ruxolitinib therapy 65% (n/N=13/20)

aClinically meaningful was defined as a ≥30% ORR.2

RESPONSES BY ORGAN SYSTEM WITH REZUROCK 200 mg ONCE DAILY IN THE mITT POPULATION (n=66)3

Bar graph of complete and partial responses (CR and PR) by organ system with REZUROCK 200 mg once daily in the modified intent-to-treat (mITT) population. Upper GI tract [(n/N=8/13)(total response 62% with PR 8% and CR 54%)], esophagus [(n/N=9/19)(CR 47%)], lower GI tract [(n/N=4/6)(CR 67%)], mouth [(n/N=16/30)(total response 53% with PR 3% and CR 50%)], joints/fascia [(n/N=38/51)(total response 75% with PR 55% and CR 20%)], liver [(3/9)(total response 33% with PR 11% and CR 22%)], skin [(18/55)(total response 33% with PR 18% and CR 15%)], eyes [(16/48)(total response 33% with PR 16% and CR 17%)] and lungs [(n/N=7/24)(total response 29% with PR 12% and CR 17%)]

CR was observed in all evaluated organs, including those with fibrotic manifestations, such as the lungs, skin, joints/fascia and GI system.2

Most responses were seen between 4 and 8 weeks3

CUMULATIVE RESPONSE RATES OVER TIME IN THE RESPONDER POPULATION WITH REZUROCK 200 mg ONCE DAILY (n/N=49/66)3

Graph showing that the time to response was as early as 4 weeks (n/N=5/49), 63% of responses were observed between weeks 4 and 8, 94% of responses were observed by week 24 and the median time to first response was 1.8 months (95% CI, 1.0-1.9)
Blue icon that states 62% of the responder population

did not experience death or new systemic therapy initiation (95% CI, 46-74) for ≥12 months after response.1

kBased on a final analysis by the FDA (n=65).

FFSe,l WITH REZUROCK 200 mg ONCE DAILY IN THE mITT POPULATION2,3

Kaplan-Meier graph showing the FFS rate was 73% at 6 months and 57% at 12 months. Number at risk starts with 66 at month 0 and decreases to 57, 47, 40, 30, 11, 3, 2, and 1 by month 24, respectively

Kaplan-Meier curve of estimated FFS.
eFFS was defined as the absence of relapse, nonrelapse mortality or a need for additional systemic therapy.2
lPrespecified secondary end point; not powered to show statistical significance.

OSf,l WITH REZUROCK 200 mg ONCE DAILY IN THE mITT POPULATION3

Kaplan-Meier graph showing the 2-year OS rate was 87%

Kaplan-Meier curve of estimated OS.
fOS was defined as the time from the first dose of REZUROCK to the date of death due to any cause.3
lPrespecified secondary end point; not powered to show statistical significance.

CLINICALLY MEANINGFUL IMPROVEMENTS IN PATIENT-REPORTED QOL1,m

Blue icon that states 52% of patients reported improvements in QOL (95% CI, 40-65)

(≥7-point reduction in LSSg summary score) with REZUROCK 200 mg once daily in the mITT population in an exploratory analysis

  • Both responders (61%) and nonrespondersn (25%) had improved QOL scores6

gThe LSS is a 30-item, 7-subscale symptom scale and QOL measurement tool that evaluates the AEs of cGVHD in the categories of skin, vitality, lung, nutritional status, psychological functioning, eye and mouth.4
kBased on a final analysis by the FDA (n=65).
mThrough cycle 7 day 1.1
nNonresponders were defined as patients with CR or PR in ≥1 organ, accompanied by progression in another organ (considered progression); outcomes that did not meet the criteria for CR, PR, progression or mixed response; or progression in ≥1 organ or site without a response in any organ or site.30

 

REDUCTION IN USE OF CS AND CNI THERAPIES IN THE 200-mg ONCE-DAILY ARM2,3,l

Patients who received CS therapy2,h

Blue icon that states doses were reduced in 64% of patients (n=42)
Blue icon that states the mean dose was reduced by 43% in patients; a mean CS dose reduction of 49% and 22% was observed in responders and nonresponders, respectively
Blue icon that states treatment was discontinued in 20% of patients (n=13)

Patients who received CNI therapy3,h

Blue icon that states doses were reduced in 42% of patients (n=10)
Blue icon that states treatment was discontinued in 17% of patients (n=4)

hThe final FDA interpretation of the ROCKstar study omitted 1 patient from the REZUROCK 200-mg once-daily arm. As a result, there are minor differences between the ROCKstar publication, where n=66, and the Prescribing Information, where n=65.
lPrespecified secondary end point; not powered to show statistical significance.
nNonresponders were defined as patients with CR or PR in ≥1 organ, accompanied by progression in another organ (considered progression); outcomes that did not meet the criteria for CR, PR, progression or mixed response; or progression in ≥1 organ or site without a response in any other organ or site.7

AE, adverse event; aGVHD, acute graft-versus-host disease; cGVHD, chronic graft-versus-host disease; CNI, calcineurin inhibitor; CR, complete response; CS, corticosteroid; DOR, duration of response; ECP, extracorporeal photopheresis; FDA, US Food and Drug Administration; FFS, failure-free survival; GI, gastrointestinal; LSS, Lee Symptom Scale; mITT, modified intent-to-treat; MOA, mechanism of action; NIH, National Institutes of Healh; ORR, overall response rate; OS, overall survival; PPI, proton pump inhibitor; PR, partial response; QOL, quality of life.

References: 1. REZUROCK. Package insert. Kadmon Pharmaceuticals, LLC. 2. Cutler C, Lee SJ, Arai S, et al; on behalf of the ROCKstar Study Investigators. Belumosudil for chronic graft-versus-host disease after 2 or more prior lines of therapy: the ROCKstar Study. Blood. 2021;138(22):2278-2289. doi:10.1182/blood.2021012021 3. Data on file 1. Kadmon Pharmaceuticals, LLC; 2021. 4. Lee SJ, Cook EF, Soiffer R, et al. Development and validation of a scale to measure symptoms of chronic graft-versus-host disease. Biol Blood Marrow Transplant. 2002;8(8):444-452. doi:10.1053/bbmt.2002.v8.pm12234170 5. Data on file 2. Kadmon Pharmaceuticals, LLC; 2021. 6. Data on file 3. Kadmon Pharmaceuticals, LLC; 2021. 7. Data on file 4. Kadmon Pharmaceuticals, LLC; 2019. 8. Broadening the definition of tolerability in cancer clinical trials to better measure the patient experience. Friends of Cancer Research. Published October 24, 2018. Accessed February 26, 2024. https://www.focr.org/sites/default/files/Comparative Tolerability Whitepaper_FINAL.pdf

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