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Bisantrene infused daily for 7 days of induction cycle 1; followed by bisantrene infusion on Days 1 and 2 and cytarabine arabinoside continuous infusion on Days 1 to 5 of each consolidation cycle for up to 3 cycles.

Each cycle is 28 days, with a potential to expand to 42 days to allow for full hematologic recovery.

Decitabine/cedazuridine daily on Days 1-5, Bisantrene infusion on Days 3 and 5 in 28 day cycle. Treatment repeats every 28 days up to 12 cycles in the absence of disease progression or unacceptable toxicity.

Each has potential to expand to 42 days to allow for full hematologic recovery.

Induction monotherapy cycle: IV bisantrene daily on Days 1 to 7, starting at 250 mg/m2 then adjusted to either 275 mg/m2 or 225 mg/m2 based on confirmed dose (Run-in) Consolidation combination cycle/s: IV bisantrene daily on Days 1 to 2

Bisantrene Dihydrochloride (high dose)

IV bisantrene at escalating doses for 3 dose levels of 50, 65, 85 mg/m2 on Days 3 and 5 until Maximum tolerated dose (MTD) reached.

Bisantrene Dihydrochloride (low dose)

Consolidation cycles: continuous IV cytarabine (100mg/m2) on Days 1 to 5

Cytarabine Hydrochloride

PO fixed-dose decitabine/cedazuridine 35/100 mg tablet daily for 5 days (Days 1 to 5), 1 hour prior bisantrene infusion

Decitabine and cedazuridine

Marinella Messina, PhD

This is a two strata Phase 1b study to assess the safety and efficacy of bisantrene (RC110) in combination with a) cytarabine arabinoside (Ara-C) treatment for patients with relapsed or refractory (R/R) Acute Myeloid Leukemia (AML) with extramedullary disease and able to tolerate intensive chemotherapy; b) in combination with decitabine/cedazuridune (ASTX727) new or relapsed or refractory AML or high risk MDS or CMML with extramedullary disease and unable or not willing to have intensive chemotherapy.

The study is a multicenter, open label in patients with haematological malignancy / myeloproliferative disease (AML, MDS and CMML) and extramedullary disease (EMD) investigating 2 treatment regimens:

1. Stratum 1 will investigate use of high dose intravenous (IV) bisantrene (RC110) in combination with IV Ara-C for R/R AML with EMD able to tolerate intensive chemotherapy. This includes a run-in stage to confirm the dose of bisantrene (RC110) for induction and in combination with Ara-C for consolidation cycles and an expansion and an expansion stage that will treat additional patients at the confirmed bisantrene dose for induction and in combination with Ara-C consolidation cycles;
2. Stratum 2 will investigate use lower doses intravenous (IV) bisantrene (RC-110) in combination with fixed-dose oral decitabine/cedazuridine (ASTX727) to determine the maximum tolerated dose (MTD) for new or R/R AML and HR-MDS/CMML unable to tolerate intensive chemotherapy.

Pre-screening will be conducted to identify patients with EMD diagnosed by standard clinical practice including histology and by fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography (18F FDG-PET/CT) imaging.

A Study of Bisantrene Combined With Cytarabine or With Decitabine for Adult Subjects With Extramedullary AML and MDS

An Open-label Two Strata Study of Bisantrene in Combination With Cytarabine Arabinoside or Bisantrene in Combination With Oral Decitabine/Cedazuridine for the Treatment of Acute Myeloid Leukemia Patients With Extramedullary Disease

Maximum tolerated dose (MTD) based on occurence dose limiting toxicity (DLT) graded according to the National Cancer Institute Common Terminology Criteria (NCI CTCAE) for Adverse Events v5.0 after completion of 2 cycles of treatment

Morphological overall response, defined as complete remission (CR), CR with incomplete hematologic recovery or morphologic leukemia free state (MLFS), after completion of first treatment cycle 1

Assessed based on the occurence of non-hematological Dose limiting toxicity (DLT) as graded according to the National Cancer Institute Common Terminology Criteria (NCI CTCAE) for Adverse Events v5.0 at the completion of cycle 1.

Response is defined as MRD negativity with and without morphological complete remission (CR), at low level molcular MRD with CR and MRD relapse (coversion MRD negativity to positivity) at the completion of cycle 1

Response evaluation by 18F-FDG-PET/CT is based on the 5-point scale Deauville criteria for complete metabolic response (defined as Deauville Score (DS) 1, 2, or 3) or for partial metabolic response (defined DS of 4 or 5 with decrease in number or activity in bone marrow/EMD disease at the completion of cycles 1,2 and 4..

Dermal response based on improvement on the static investigator global assessment (IGA) 5-point disease severity scores, where higher score indicate more disease, defined as decrease of at least two points relative to baseline at the completion of cycles 1,2 3 and 4.

Dermal therapeutic improvement based on the static investigator global assessment (IGA) 5-point disease severity scores, where higher score indicate more disease, defined as decrease of at least two points relative to baseline at the completion of cycles 1,2 3 and 4.

Safety and tolerability based on the incidence and severity of adverse events assessed using National Cancer Institute-Common Terminology Criteria for Adverse Events \[NCI-CTCAE\] v5.0, grade per event, patient, and cycle of treatment.

Proportion of patients who receive subsequent allogeneic HSCT

EFS assessed between treatment start until the date of the earliest of these events: death, progression or off protocol-treatment for any reason using the Kaplan-Meier method

OS assessed between treatment start until death due to any cause using the Kaplan-Meier method

Morphological overall response, defined as either CR or CR as complete remission (CR), CR with incomplete hematologic recovery, CR with incomplete count recovery or MLFS. For patients with MDS/CMML, overall response, defined as either CR or modified CR mCR with haematological improvement (HI) at the end of cycle 1

Response is defined as MRD negativity with and without morphological complete remission (CR), at low level molecular MRD with CR and MRD relapse (coversion MRD negativity to positivity) at the completion of cycle 4.

Response evaluation by 18F-FDG-PET/CT, based on the 5-point scale Deauville criteria for complete metabolic response (defined as as Deauville Score (DS) 1, 2, or 3) or for partial metabolic response (defined as DS of 4 or 5 with decrease in number or activity in bone marrow/EMD disease) at the the completion of cycles 4, 6, 9 and 12

Dermal clinical improvement based on the static investigator global assessment (IGA) 5-point disease severity scores, where higher score indicate more disease, defined as as disease severity score of 1 (almost clear) or 0 (clear) and at least a two grade/point decrease in severity score relative to baseline the completion of cycles 4, 6, 9 and 12

Dermal therapeutic improvement based on the static investigator global assessment (IGA) 5-point disease severity scores, where higher score indicate more disease, defined as decrease of at least two points relative to baseline the completion of cycles 4, 6, 9 and 12.

EFS assessed between treatment start until the date of the earliest of these events: death, progression or off protocol-treatment for any reason assessed

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
A Study of Bisantrene Combined With Cytarabine or With Decitabine for Adult Subjects With Extramedullary AML and MDS	NCT05456269	Acute Myeloid L... Recurrent Acute... Refractory Acut... Higher Risk Mye... Chronic Myelomo...	Bisantrene Dihy... Bisantrene Dihy... Cytarabine Hydr... Decitabine and ...	18 Years -	Race Oncology Ltd
A Study of Bisantrene Combined With Cytarabine or With Decitabine for Adult Subjects With Extramedullary AML and MDS	NCT05456269	Acute Myeloid L... Recurrent Acute... Refractory Acut... Higher Risk Mye... Chronic Myelomo...	Bisantrene Dihy... Bisantrene Dihy... Cytarabine Hydr... Decitabine and ...	18 Years -	Race Oncology Ltd

Spots Global Cancer Trial Database for bisantrene dihydrochloride (high dose)