Refractory Acute Myeloid Leukemia (AML)

This is a Phase 1, open label, dose-escalation study to evaluate the safety, expansion, persistence, and preliminary clinical activity of lentivirally transduced autologous T cells expressing anti-CD64 chimeric antigen receptors (CAR) expressing tandem CD3ζ and 4-1BB (CD3ζ/4-1BB) costimulatory domains in subjects with refractory or relapsed (R/R) acute myeloid leukemia (AML). This CAR T cell product will be referred to as "CD64 CAR T" which is CD64 directed, autologous, genetically modified CAR T cells. The primary objective of the study is to identify the safety profile and maximum tolerated dose (MTD) of CD64 CAR T in subjects with R/R AML as determined by the defined DLTs using a standard Bayesian Optimal Interval (BOIN) design.

Acute myeloid leukemia Acute myeloid leukemia (AML) is a clonal hematopoietic cancer that disrupts normal hematopoiesis, ultimately leading to bone marrow failure and death. The annual incidence rate of AML is 4.1 per 100000 people in the US and is higher in patients older than 65 years. There has been a steady improvement in survival over the decades, more noticeably so in younger patients and in the last decade. Azacitidine and Venetoclax is now the standard treatment of newly diagnosed AML ineligible for intensive chemotherapy, while still facing the dilemma of relapse and refractory disease. Anthracycline-based chemotherapeutics were wildly used in the treatment of fit AML patients. While the cardiovascular toxicity leading to morbidity and mortality limited the use of daunorubicin/idarubicin in unfit patients. Aclarubicin, also known as aclacinomycin A, is an anthracycline type of antibiotic with significant anti-cancer properties. Previous studies have shown that aclarubicin only induces histone eviction without causing DNA damage, and it stands out in pre-clinical models and clinical studies, as it potently kills AML cells. Meanwhile, aclarubicin lacks cardiotoxicity, and can be safely administered even after the maximum cumulative dose of either doxorubicin or idarubicin has been reached. CAG regimen, combined with low-dose cytarabine, aclarubicin and G-CSF has been widely used in China and Japan for treatment of AML. The purpose of this study is to determine the maximum tolerated dose, safety and efficacy of aclarubicin combined with azacitidine and venetoclax for subjects with newly diagnosed and relapsed /refractory AML.

This is a first-in-human, multicenter, open-label, phase 1 study to evaluate the safety, PK, PD and preliminary efficacy of STX-0712 in patients with advanced CMML and AML for whom there are no further treatment options known to confer clinical benefit.