Ryvu Therapeutics S.A. Presents Clinical and Translational Data of RVU120 and SEL24 at the 2022 American Society of Hematology Annual Meeting
Additionally, the on-target activity of RVU120 was evaluated in AML and HR-MDS patient samples by measuring changes in pSTAT5 levels. As of the cut-off date, the inhibition of pSTAT5 reached >50% in some patients, a threshold, that may be sufficient for robust efficacy in certain groups of super-responder patients. Combined results from the ongoing dose-escalation trials (in 10-135 mg dose range) in AML/HR-MDS and solid tumor patients indicate that pSTAT5 inhibition is dose-dependent. Ryvu licensee, Menarini Group, and academic collaborators presented new data on SEL24 (MEN1703), a first-in-class, oral, dual type I PIM/FLT3 inhibitor. Combination therapy of SEL24 (MEN1703) with gilteritinib, a highly potent and selective oral FLT3 inhibitor, induces strong tumor regression and complete responses in vivo, demonstrating the potential of concomitant FLT3 and PIM inhibition kinases in AML. SEL24 (MEN1703)-induced PIM inhibition, and the mechanism of action was also demonstrated in vitro in multiple myeloma (MM), classical Hodgkin lymphoma-tumor-associated macrophages (cHL-TAMs), and diffuse large B-cell lymphoma (DLBCL) models. In multiple myeloma preclinical models, SEL24 (MEN1703) induces cytotoxicity of MM cell lines, disrupts MM endothelial cell vessel formation, and decreases the activity of several pathways essential for myeloma cell survival. This study demonstrates the promising therapeutic potential of SEL24 (MEN1703) in MM and reveals the underlying mechanism of PIM inhibition. Indeed PIM-dependent oncogenic signaling pathways were also inhibited following SEL24 (MEN1703) treatment of MM cells.