Extension Study to Evaluate Long-Term Effects of Luspatercept in Patients With Myelodysplastic Syndromes (MDS) (A536-05/MK-6143-003)

Acceleron Pharma

Status and phase

Completed

Phase 2

Conditions

Myelodysplastic Syndromes

Treatments

Drug: Luspatercept

Study type

Interventional

Funder types

Industry

Identifiers

NCT02268383

MK-6143-003 (Other Identifier)

2014-001280-13 (EudraCT Number)

A536-05

Details and patient eligibility

About

This study is an open-label extension study for participants previously enrolled in study MK-6143-001 (formerly called A536-03, ClinicalTrials.gov Identifier NCT01749514), to evaluate the long-term safety and tolerability of luspatercept (MK-6143) in participants with low or intermediate-1 risk MDS.

Full description

This study is an open-label extension study to evaluate the safety, tolerability, and pharmacodynamic effects of up to 24 months of luspatercept treatment in participants with low or intermediate-1 risk myelodysplastic syndromes previously treated with luspatercept for up to 3 months in MK-6143-001 study (NCT01749514). The starting dose level in this study will be 1.0 mg/kg by subcutaneous (SC) injection every 3 weeks. Dose titration/modification rules will be followed for individual participants and will be based upon safety and efficacy data collected during the course of treatment.

Enrollment

75 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Completion of the treatment period in the base study MK-6143-001 (ClinicalTrials.gov Identifier: NCT01749514)
Adequate birth control measures
Patient is able to adhere to the study visit schedule, understand and comply with all protocol requirements
Patient understands and is able to provide written informed consent
In addition, patients with treatment interruption (defined as patients who complete their end-of-study visit in MK-6143-001 and cannot directly roll over to MK-6143-003) must also meet the following criteria:
- Documented diagnosis of idiopathic/de novo MDS or non-proliferative chronic myelomonocytic leukemia (CMML) according to the World Health Organization (WHO) criteria 16 (white blood count (WBC) < 13,000/μL) that meets International Prognostic Scoring System (IPSS) classification of low or intermediate-1 risk disease as determined by microscopic and standard cytogenetic analyses of the bone marrow and peripheral complete blood count (CBC) obtained during screening;
Anemia defined as:
- Mean hemoglobin concentration < 10.0 g/dL of 2 measurements (one performed within one day prior to Cycle 1 Day 1 and the other performed 7-28 days prior to Cycle 1 Day 1), for non-transfusion dependent (NTD) patients (defined as having received ˂ 4 units of red blood cells (RBCs) within 8 weeks prior to Cycle 1 Day 1), OR
- Transfusion Dependent (TD), defined as having received ≥ 4 units of RBCs within 8 weeks prior to Cycle 1 Day 1
Platelet count ≥ 30 x 109/L
Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1, or 2 (if related to anemia)
Adequate renal (creatinine ≤ 2.0 x upper limit of normal [ULN]) and hepatic (total bilirubin < 2 x ULN and aspartate aminotransferase (AST) and alanine aminotransferase (ALT) < 3 x ULN) function

Exclusion criteria

Discontinuation/withdrawal from the base study A536-03 (due to patient request, patient unwillingness or inability to comply with the protocol, pregnancy, use of prohibited medication [e.g. azacitidine], medical reason or adverse event (AE), hypersensitivity reaction to the study drug, at the discretion of the sponsor, or loss to follow-up) prior to completion of the treatment period
Prior treatment with azacitidine or decitabine
Treatment within 28 days prior to Cycle 1 Day 1 with:
- An erythropoiesis-stimulating agent (ESA),
- Granulocyte colony-stimulating factor (G-CSF) and granulocyte-macrophage colony stimulating factor (GM-CSF),
- Lenalidomide
Iron chelation therapy if initiated within 56 days prior to Cycle 1 Day 1
Treatment with another investigational drug (including sotatercept [ACE-011]) or device, or approved therapy for investigational use ≤ 28 days prior to Cycle 1 Day 1, or if the half-life of the previous investigational product is known, within 5 times the half-life prior to Cycle 1 Day 1, whichever is longer
Major surgery within 28 days prior to Cycle 1 Day 1. Patients must have completely recovered from any previous surgery prior to Cycle 1 Day 1
Known positive for human immunodeficiency virus (HIV), active infectious hepatitis B (HBV) or active infectious hepatitis C (HCV)
Uncontrolled hypertension defined as systolic blood pressure (SBP) ≥ 150 mm Hg or diastolic blood pressure (DBP) ≥ 100 mm Hg
Pregnant or lactating females
History of severe allergic or anaphylactic reactions or hypersensitivity to recombinant proteins or excipients in the investigational drug
Any other condition not specifically noted above which, in the judgment of the investigator, would preclude the patient from participating in the study