AB Science will hold a virtual conference on Thursday, October 16, 2025 from 2pm to 3pm CET to provide an update on the Phase 1 study with AB8939

Core Insights - AB Science has released initial data on the combination of AB8939 and Venetoclax for treating refractory or relapsed acute myeloid leukemia (AML), showing positive responses in the first three patients with unfavorable genetic profiles [1][2][5] Group 1: Clinical Trial Details - AB8939 is currently in a Phase 1 clinical trial (study AB18001, NCT05211570) targeting refractory and relapsed AML [3][4] - The trial has completed its first two stages, determining the maximum tolerated dose (MTD) at 21.3 mg/m² after 3 and 14 days of monotherapy [4] - The third stage is evaluating the combination of AB8939 and Venetoclax, with initial results showing a 100% disease control rate and a 100% partial response rate among the three patients [5][6] Group 2: Patient Profiles and Responses - The three patients involved in the trial have very difficult-to-treat cytogenetic profiles, including TP53 mutations and complex karyotypes, which are typically associated with poor prognosis [5][6] - Notably, one patient achieved complete remission after the first cycle of treatment, which lasted 14 days [5][6] Group 3: Future Directions - Following the initial encouraging results, the trial will continue with an expansion phase involving about 15 patients with a more homogeneous profile, specifically targeting those in their second or third line of treatment with poor prognostic factors [6] - The ongoing research aims to confirm the initial promising clinical data before initiating a registration clinical trial [6] Group 4: Company Background - AB Science is a pharmaceutical company founded in 2001, specializing in the research, development, and commercialization of protein kinase inhibitors (PKIs) [12][13] - The company focuses on diseases with high unmet medical needs, often lethal or rare, and has developed a proprietary portfolio of molecules [12][13]