Venetoclax and Lintuzumab-Ac225 in AML Patients
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT03867682 |
Recruitment Status :
Recruiting
First Posted : March 8, 2019
Last Update Posted : March 8, 2022
|
- Study Details
- Tabular View
- No Results Posted
- Disclaimer
- How to Read a Study Record
The study is a multicenter, open label Phase I/II trial.
- To determine the maximum tolerated dose (MTD) of lintuzumab-Ac225 added to venetoclax for patients with CD33 positive relapsed/refractory AML. (Phase 1 portion)
- To assess the percentage of patients with CR, CRh, or Overall Response (CR + CRh), up to 6 months after the start of treatment without receiving other AML therapies. (Phase 2 portion)
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Acute Myeloid Leukemia Relapsed Adult AML | Biological: Lintuzumab-Ac225 Drug: Venetoclax Drug: Spironolactone | Phase 1 Phase 2 |
The study is a multicenter, open label Phase I and Phase II trial combining lintuzumab-Ac225 with venetoclax in patients who have relapsed or refractory AML.
The Phase I portion is a dose-finding study which will enroll at least three patients at each dose level. Patients in a dose level will be observed for a minimum of 4 weeks before dose escalation occurs. There is no dose escalation for any individual patient.
The Phase II portion of the study will enroll patients at the MTD dose level of lintuzumab-Ac225 as determined in the Phase I portion of the study. The goal of the Phase II portion will be to further characterize the safety and efficacy of the MTD dose of lintuzumab-Ac225.
Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 38 participants |
Allocation: | N/A |
Intervention Model: | Single Group Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | A Phase I/II Study of Venetoclax and Lintuzumab-Ac225 in Patients With Refractory or Relapsed AML |
Actual Study Start Date : | January 15, 2020 |
Estimated Primary Completion Date : | December 2022 |
Estimated Study Completion Date : | January 2023 |

Arm | Intervention/treatment |
---|---|
Experimental: Phase I and Phase II
Lintuzumab-Ac225 administered on Day 5 of each cycle for four cycles (unless in the 0.5 μCi/kg or 0.25 μCi/kg cohorts, where there is a potential for an additional four cycles, pending PI and Medical Monitor review). Venetoclax taken on Days 1-21 of each cycle for up to 12 cycles. Each cycle is 28 days, with a potential to expand to 42 days to allow for full hematologic recovery. |
Biological: Lintuzumab-Ac225
In the Phase I, patients will be enrolled into the following dose escalation cohorts: 0.50 μCi/kg, 1.0 μCi/kg, and 1.5 μCi/kg. If the 0.50 μCi/kg dose is determined to exceed the MTD, a 0.25 μCi/kg dose will be explored.
Other Name: Actimab Drug: Venetoclax 400 mg daily will be taken orally on Days 1-21 of a 28-day cycle. There will be a ramp up of venetoclax dosing in the first cycle, with 100 mg administered on Day 1, 200 mg on Day 2, and 400 mg on Day 3 and Day 4 and later. Patients on antifungal azoles should receive one-half these doses, up to a maximum of 200 mg of venetoclax.
Other Name: Venclexta Drug: Spironolactone 25 mg by mouth daily, administered on Cycle 1 Day 15 and continued for 12 months after the subject's last treatment with lintuzumab-Ac225.
Other Name: Aldactone |
- Phase I: Maximum Tolerated Dose (MTD) of Lintuzumab-Ac225 [ Time Frame: Cycle 1, up to 48 days ]To determine the maximum tolerated dose (MTD) of lintuzumab-Ac225 added to venetoclax for patients with CD33 positive relapse/refractory AML.
- Phase II: Overall Response (CR + CRh + CRi) [ Time Frame: Up to 6 months ]To assess the percentage of patients with CR, CRh, CRi or Overall Response (CR + CRh + CRi), up to 6 months after the start of treatment without receiving other AML therapies.
- Phase I: Overall Response [ Time Frame: Up to 6 months ]Number of patients who's overall response is CR, CRh, or CRi
- Phase I and II: OS [ Time Frame: End of 6 months, 12 months, 2 years ]Number of patients who died
- Phase I and II: DFS [ Time Frame: End of 6 months, 12 months, 2 years ]Disease-free survival
- Phase I and II: Evaluate incidence of AEs and SAEs [ Time Frame: Through study completion, up to 2 years ]Rate of AEs and SAEs, including infusion-related reactions
- Phase I and II: Evaluate BH3 priming assay results [ Time Frame: Completion of Cycle 1, estimated 1 month ]Summary of assay results
- Phase I and II: MRD status [ Time Frame: From date of first dose until the date of first documented response, first assessment at 6 months ]Number of patients who are MRD negative
- Phase I and II: Lab abnormalities (other than hematologic indices) [ Time Frame: Through study completion, up to 2 years ]Summary of rate of Grade 3/4 lab abnormalities

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
-
Refractory or relapsed AML which will include:
- Refractory disease will be defined as at least 1 prior treatment with no remission.
- Relapsed disease will be defined as 5% or more blasts in bone marrow seen after remission.
- Patients with AML arising from myelodysplastic syndromes (including CMML) or myeloproliferative neoplasms (secondary AML, ts-AML) are also eligible.
- Circulating blast count ≤ 200/μL within 10 days prior to first cycle of treatment. Hydroxyurea should be used to keep the peripheral blast count ≤ 200/μL until the first day of protocol treatment, to the extent that this is possible
- ECOG ≤ 2
- Estimated creatinine clearance ≥ 50 mL/min
- AST and ALT ≤ 3.0 x ULN
- Bilirubin ≤ 3.0 x ULN
Exclusion Criteria:
- Active CNS Leukemia.
- Known HIV infection or known hepatitis B or hepatitis C infection (with a detectable viral load).
- Participant has received strong and/or moderate CYP3A inducers within 7 days prior to the initiation of study treatment.
-
Secondary refractory AML (e.g., treated for current relapse without achieving remission);
a. With the exception that single agent FLT3 inhibitors, IDH1/IDH2 inhibitors are allowed for current relapse without achieving remission.
- Have received prior radiation to maximally tolerated levels to any critical normal organ.
- Clinically significant cardiac disease.
- Active, uncontrolled serious infection.
- Have other non-myeloid malignancy within 2 years of entry (with exceptions).
- Psychiatric disorder that would preclude study participation
- Previous solid organ transplant (prior treatment with SCT is allowed but not if patient has GVHD or is still receiving immunosuppression/GVHD therapy).

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03867682
Contact: Actinium Pharmaceuticals, Inc. | +1-646-677-3878 | actimab@actiniumpharma.com |
United States, California | |
University of California | Recruiting |
Los Angeles, California, United States, 90095 | |
United States, Kentucky | |
University of Louisville | Recruiting |
Louisville, Kentucky, United States, 40202 | |
United States, Louisiana | |
Ochsner Clinic Foundation | Recruiting |
New Orleans, Louisiana, United States, 70121 | |
United States, New York | |
Weill Cornell Medicine | Recruiting |
New York, New York, United States, 10021 | |
United States, Washington | |
Fred Hutchinson Cancer Research Center | Recruiting |
Seattle, Washington, United States, 98109 |
Study Chair: | Avinash Desai, MD | Actinium Pharmaceuticals, Inc. |
Responsible Party: | Actinium Pharmaceuticals |
ClinicalTrials.gov Identifier: | NCT03867682 |
Other Study ID Numbers: |
LIN-AC225-AML02 |
First Posted: | March 8, 2019 Key Record Dates |
Last Update Posted: | March 8, 2022 |
Last Verified: | February 2022 |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Lintuzumab-Ac225 Venetoclax Lintuzumab Refractory AML |
Venetoclax Lintuzumab Spironolactone Antineoplastic Agents Mineralocorticoid Receptor Antagonists Hormone Antagonists |
Hormones, Hormone Substitutes, and Hormone Antagonists Physiological Effects of Drugs Diuretics, Potassium Sparing Diuretics Natriuretic Agents Antineoplastic Agents, Immunological |