An Open-Label Extension Study to Evaluate the Long-Term Effects of ACE-536 for the Treatment of Anemia in Patients With Low or Intermediate-1 Risk Myelodysplastic Syndromes (MDS) Previously Enrolled in Study A536-03
An Open-Label Extension Study to Evaluate the Long-Term Effects of ACE-536 for the Treatment of Anemia in Patients With Low or Intermediate-1 Risk Myelodysplastic Syndromes (MDS) Previously Enrolled in Study A536-03
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.
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.
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:
Anemia defined as:
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:
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