- Results of REACH3 trial also demonstrate significant improvements in failure-free survival (FFS) and patient-reported symptoms1
- Chronic graft-versus-host disease (GvHD) is a life-threatening complication of stem cell transplants and half of patients become steroid refractory/dependent2,3
- Findings from the study were presented at ASH 2020, and complement previously reported positive results for Jakavi in acute GvHD; data to be submitted to ex-U.S. health authorities4
Basel, December 4, 2020 - Detailed results from the pivotal Phase III REACH3 study demonstrate Jakavi (ruxolitinib) significantly improved outcomes across a range of efficacy measures in patients with steroid-refractory/dependent chronic graft-versus-host disease (GvHD) compared to best available therapy (BAT)1. The results of REACH3, the first successful, randomized Phase III trial in chronic GvHD, were presented today during the 62nd American Society of Hematology Annual Meeting & Exposition (ASH). REACH3 is jointly sponsored by Novartis and Incyte.
"The damaging and sometimes deadly effects of chronic GvHD following stem cell transplant present significant treatment challenges, particularly for the nearly half of patients who do not adequately respond to steroid treatment," said Dr. Robert Zeiser, University Hospital Freiburg, Department of Haematology, Oncology and Stem Cell Transplantation, Freiburg, Germany. "Based on the compelling REACH3 results, we now have a potential new standard of care for these patients."
In REACH3, patients treated with Jakavi achieved significantly greater overall response rate (ORR) compared to BAT (49.7% vs. 25.6%; p<0.0001i) at Week 24, the primary endpoint of the study1. Jakavi also demonstrated statistically significant and clinically meaningful improvements in key secondary endpoints:
- Patients receiving Jakavi had a significant improvement of failure-free survival (FFS; defined as time to the earliest recurrence of the underlying disease, the start of new systemic treatment for chronic GvHD, or death) than patients receiving BAT (median FFS not yet reached vs. 5.7 months; hazard ratio, 0.370, 95% CI, 0.268 to 0.510; p<0.0001)1.
- Patients treated with Jakavi also had greater improvements in patient-reported symptoms than those treated with BAT (24.2% vs. 11.0%; p=0.0011), as measured by the rate of responders who achieved a reduction of = 7 points of total symptom score (TSS) from baseline of the modified Lee Symptom Score (mLSS)1.
- Additionally, best overall response (BOR) rate was achieved in 76.4% of patients in the Jakavi arm compared to 60.4% in the BAT arm (odds ratio [OR], 2.17; 95% CI, 1.34-3.52). The median duration of response was 6.24 months in the BAT arm, but was not reached in the Jakavi arm1.
"These impressive results in chronic GvHD, which complement previous positive findings in the acute form of the disease, clearly define the role Jakavi can play in improving outcomes for patients facing this difficult-to-treat condition," said David Feltquate, Head Hematology Development Unit, Novartis. "Jakavi is the first treatment to demonstrate efficacy in a large-scale randomized clinical trial in steroid-refractory/dependent chronic GvHD, and with these meaningful data we look forward to advancing discussions with regulatory authorities."
No new safety signals were observed in REACH3, and adverse events (AEs) attributable to treatment were consistent with the known safety profile of Jakavi. The most common AEs in the Jakavi vs. BAT arms were anemia (29.1% vs. 12.7%), thrombocytopenia (21.2% vs. 14.6%), hypertension (15.8% vs. 12.7%) and pyrexia (15.8% vs. 9.5%). While 37.6% and 16.5% of patients required Jakavi and BAT dose modifications, respectively, the number of patients who discontinued treatment due to AEs was low (16.4% and 7%, respectively). Mortality rates were similar across treatment arms (19% vs. 16% BAT)1. Deaths reported as primarily due to chronic GvHD were slightly higher for Jakavi.
GvHD, a common and potentially life-threatening complication that can arise after allogeneic stem cell transplants, is a reaction where the donor’s cells attack the recipient’s normal cells because it sees them as foreign2. The two main types of GvHD are acute GvHD, which occurs within 100 days of transplant, and chronic GvHD, which occurs after 100 days of transplant2. Around 50 percent of people experience either acute or chronic GvHD, or both, following allogeneic stem cell transplant3. Symptoms of chronic GvHD can affect the skin, gastrointestinal tract, liver, mouth, lungs and joints5. There is a need for additional treatment options for people who do not respond to initial steroid therapy for GvHD or are considered steroid-refractory3.
In 2019, the US Food and Drug Administration approved ruxolitinib (marketed by Incyte Corporation in the U.S. as Jakafi ) for the treatment of steroid-refractory acute GvHD in adult and pediatric patients 12 years and older based on results of the single-arm Phase II REACH1 trial6. REACH3 (NCT03112603) is a Phase III, randomized, open-label, global multicenter study to evaluate Jakavi compared to BAT in patients with steroid-refractory or steroid-dependent chronic GvHD following allogeneic stem cell transplant7. Regulatory filings for steroid-refractory/dependent GvHD in Europe and other ex-US countries based on these data are planned for the first half of 2021.
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About Jakavi (ruxolitinib)
Jakavi (ruxolitinib) is an oral inhibitor of the JAK 1 and JAK 2 tyrosine kinases. Jakavi is approved by the European Commission for the treatment of adult patients with polycythemia vera (PV) who are resistant to or intolerant of hydroxyurea and for the treatment of diseaserelated splenomegaly or symptoms in adult patients with primary myelofibrosis (MF) (also known as chronic idiopathic MF), post-polycythemia vera MF or post-essential thrombocythemia MF. Jakavi is approved in over 100 countries for patients with MF, including EU countries, Switzerland, Canada, Japan and in more than 85 countries for patients with PV, including EU countries, Switzerland, Japan and Canada. The exact indication for Jakavi varies by country. Additional worldwide regulatory filings are underway in MF and PV.
Novartis licensed ruxolitinib from Incyte Corporation for development and commercialization outside the United States. Ruxolitinib is marketed in the United States by Incyte Corporation as Jakafi for patients with PV who have had an inadequate response to or are intolerant of hydroxyurea, for patients with intermediate or high-risk MF, and steroid-refractory acute GvHD in adult and pediatric patients 12 years and older6.
The recommended starting dose of Jakavi in PV is 10 mg given orally twice daily. The recommended starting dose of Jakavi in MF is 15 mg given orally twice daily for patients with a platelet count between 100,000 cubic millimeters (mm) and 200,000 mm, and 20 mg twice daily for patients with a platelet count of >200,000 mm. Doses may be titrated based on safety and efficacy. There is limited information to recommend a starting dose for MF and PV patients with platelet counts between 50,000/mm and <100,000/mm. The maximum recommended starting dose in these patients is 5 mg twice daily, and patients should be titrated cautiously6.
Jakavi is a registered trademark of Novartis AG in countries outside the United States. Jakafi is a registered trademark of Incyte Corporation. The safety and efficacy profile of Jakavi has not yet been established outside of its approved indications.