Ryvu Therapeutics Announces Dosing of the First Patient in the POTAMI-61 Phase II Study of RVU120 for the Treatment of Patients with Myelofibrosis (MF)
- The primary goal of the study is to evaluate the safety and efficacy of RVU120 in patients with myelofibrosis (MF), both as a single agent and in combination with ruxolitinib (RUX).
- The study was launched based on RVU120's activity in the RIVER-51 Phase I study in patients with acute myeloid leukemia (AML) and translational data generated in MF.
"We are excited to announce the initiation of the RVU120 Phase II study, POTAMI-61, the fourth Phase II clinical trial included in the RVU120 development plan that Ryvu presented last year. Based on RVU120's effect on bone marrow and hematopoietic cells observed in the RIVER-51 study and translational data generated in myelofibrosis with Prof. Raajit Rampal from
The POTAMI-61 study is an open-label, multicenter Phase II study of RVU120, a novel small-molecule cyclin-dependent kinase (CDK) 8/19 inhibitor, to treat patients with MF. In the POTAMI-61 study, RVU120 is being explored as a single agent for the treatment of patients with primary or secondary MF previously treated with or ineligible for a JAK inhibitor, e.g. ruxolitnib, or in combination with RUX for patients with suboptimal response to JAK inhibitors. Key endpoints will be spleen volume reduction (SVR), total symptom score (TSS) improvement, and bone marrow fibrosis reduction.
The study is being initiated based on RVU120's clinical safety and efficacy data, and strong preclinical and mechanistic rationale. In vivo data demonstrate the beneficial effects of CDK8 inhibition on the improvement of symptoms, i.e., splenomegaly, hepatomegaly, anemia, and thrombopenia. Importantly, disease modification properties of RVU120 were shown by the reduction of mutated allele burden. RVU120 has the potential to become a novel therapeutic strategy in myeloproliferative neoplasms, including MF.
In the POTAMI-61 study, patients will receive RVU120 until disease progression, withdrawal of consent or other reasons specified in the study protocol. The POTAMI-61 study consists of two parts. Part A of the study with a planned enrollment of approximately 20 patients will comprise two cohorts: 1) single-agent therapy with RVU120 in patients resistant or refractory to prior JAK inhibitor treatment or ineligible for JAK inhibitor treatment, and 2) RVU120 in combination with RUX in patients who experience a suboptimal response to prior JAK inhibitor treatment. Depending on results from Part A, cohorts 1 and/or 2 could be expanded in Part B which will further assess safety, tolerability, and antitumor activity in a larger cohort, totaling up to approximately 230 patients for both Part A and Part B combined. RVU120 could also be investigated in a frontline setting in cohort 3. Ryvu will initially proceed with the execution of Part A of the study, while the decision on the potential initiation of Part B will be based on the outcomes of Part A.
Initially, Part A of the study will enroll patients at clinical sites in
POTAMI-61 represents the fourth planned RVU120 Phase II clinical study launched in 2024. Ryvu is already treating patients with acute myeloid leukemia (AML) or high-risk myelodysplastic syndromes (HR-MDS) in the RIVER-52 and RIVER-81 studies, as a single agent or in combination with venetoclax. RVU120 is also being investigated in the REMARK study for the treatment of patients with lower-risk myelodysplastic syndromes (LR-MDS).
POTAMI-61 is part of RVU120's Development Plan presented in
About
Ryvu's most advanced program is RVU120, a selective CDK8/CDK19 kinase inhibitor with the potential to treat hematological malignancies and solid tumors. RVU120 is currently in Phase II development (i) as a monotherapy for the treatment of patients with relapsed/refractory acute myeloid leukemia (r/r AML) and high-risk myelodysplastic syndromes (HR-MDS) – the RIVER-52 study, (ii) in combination with venetoclax for the treatment of patients with r/r AML – the RIVER-81 study, (iii) as a monotherapy for the treatment of patients with lower-risk myelodysplastic syndromes (LR-MDS) – the REMARK study, (iv) as a monotherapy and in combination with ruxolitinib for the treatment of patients with myelofibrosis (MF) – the POTAMI-61 study. MEN1703 (SEL24) is a dual PIM/FLT3 kinase inhibitor licensed to the
The Company was founded in 2007 and is headquartered in Kraków,
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