Study of Safety & PK of Luspatercept (ACE-536) in Pediatric Participants With Beta (β)-Thalassemia

A Phase 2a Study to Evaluate the Safety and Pharmacokinetics of Luspatercept (ACE-536) in Pediatric Participants With Beta (β)-Thalassemia

This is a Phase 2a study to evaluate the safety and pharmacokinetics (PK) of luspatercept in pediatric participants with β-thalassemia.

The study will be conducted in 2 parts for both transfusion-dependent (TD) and non-transfusion-dependent (NTD) β-thalassemia participants: TD Part A will be in adolescent participants aged 12 to <18 years with two dose escalation cohorts, followed by a dose expansion cohorts. NTD Part A will be conducted in the same age group participants as TD Part A with dose confirmation and expansion cohorts. After Part A TD participants have completed at least one year of treatment, all available safety data from Part A adolescent participants will be evaluated before initiating TD and NTD Part B in the age group from 6 to <12 years old. Part B will consist of two dose escalation cohorts for TD and two dose escalation cohorts for NTD.

Upon completion of the Treatment Period, participants of any cohort who are benefiting from the study treatment, will be offered the opportunity to continue luspatercept treatment in the Long-term Treatment Period for up to 5 years from their first dose.

Participants who discontinue study treatment at any time will continue in the Posttreatment Follow-up Period for at least 5 years from their first dose of luspatercept, or 3 years from their last dose, whichever occurs later, or until they withdraw consent/assent, are lost to follow-up, or the End of Trial, whichever occurs first.

Study Overview

• Status: Recruiting
• Conditions: Beta-Thalassemia
• Intervention / Treatment: Drug: ACE-536

Detailed Description

This is a Phase 2a study to evaluate the safety and pharmacokinetics (PK) of luspatercept in pediatric participants who require regular red blood cell (RBC) transfusions due to β-thalassemia and to determine the recommended dose (RD).

The primary endpoints are the determination of the RD and PK parameters (including Cmax, AUC, t1/2, CL/F and Vd/F).

The secondary endpoints include the safety of luspatercept in pediatric participants, the immunogenicity (frequency of antidrug antibodies) of luspatercept, mean change in RBC transfusion burden, mean change in hemoglobin levels, mean change from baseline in mean daily dose of iron chelation therapy (ICT), and mean change from baseline in serum ferritin.

The study will consist of the following periods:

• Screening/Run-in Period
• Treatment Period
• Long-term Treatment Period
• Posttreatment Follow-up Period

Participant screening procedures will occur during the Screening/Run-in Period, within 12 weeks prior to the start of study treatment. Participants who meet the study eligibility criteria will be enrolled into the Treatment Period.

The study will be conducted in a staggered manner, in descending order of age, with 2 parts as described below.

Part A

Adolescent participants aged 12 to < 18 years: Luspatercept 0.75 will be enrolled as outlined below:

Part A Dose Escalation Phase

Part A Dose Escalation Phase will explore up to 2 dose levels of luspatercept, 0.75 mg/kg and 1.0 mg/kg, to evaluate the safety and tolerability of luspatercept in this age group and determine the RD to be used for Part A Expansion Phase:

• Cohort 1: 6 adolescent participants 12 to < 18 years of age receiving luspatercept 0.75 mg/kg, administered subcutaneously (SC) once every 21 days (for up to 4 cycles in the Treatment Period)
• Cohort 2: 6 adolescent participants 12 to < 18 years of age receiving luspatercept 1.0 mg/kg, administered SC once every 21 days (for up to 4 cycles in the Treatment Period)

Part A Expansion Phase

• Cohort 3 - The Expansion Cohort: 30 adolescent participants (12 to < 18 years of age) receiving luspatercept at the RD for up to 12 months in the Treatment Period.

Part B

Children from 6 years to < 12 years of age will be enrolled into Part B as outlined below:

Part B Dose Escalation Phase will explore 2 dose levels of luspatercept, 1.0 mg/kg and 1.2 mg/kg, to evaluate the safety and tolerability of luspatercept in this age group and determine the RD.

• Cohort 4: 6 participants (6 to < 12 years of age) receiving luspatercept 1.0 mg/kg, administered SC once every 21 days (for up to 4 cycles in the Treatment Period)
• Cohort 5: 6 participants (6 to < 12 years of age) receiving luspatercept 1.2 mg/kg, administered SC once every 21 days (for up to 4 cycles in the Treatment Period)

During the Treatment Period of both Part A Dose Escalation Phase and Part B Dose Escalation Phase, once all 6 participants in a dose escalation cohort have completed the first cycle (Study Day 22), the Dose Review Team (DRT), will review all available safety data, including dose-limiting toxicities (DLTs), adverse events (AEs), serious adverse events (SAEs), and laboratory results (including hematology and chemistry) reported during Cycle 1 of each dose level.

A DLT, using the current active version of the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 5.0, is defined as any of the following toxicities at any dose level occurring within 21 days of the first administered dose:

• Treatment-related SAE of ≥ Grade 3
• Treatment-related nonhematologic AE of ≥ Grade 3
• Treatment-related hematologic AE of ≥ Grade 4

The DRT will make a recommendation as to whether or not to enroll the next cohort at the next planned dose level based in part upon the following criteria:

• If a DLT occurs in ≤ 1 participant (out of 6) in a cohort within 21 days following the initial dose of luspatercept, the next planned dose level may proceed;
• If a DLT occurs in ≥ 2 participants (out of 6) in a cohort within 21 days following the initial dose of luspatercept, the next planned dose level should not proceed;
• If a hemoglobin increase of ≥ 2.0 g/dL (confirmed by central lab after initial study treatment administration and not attributable to RBC transfusion) occurs in ≥ 2 participants (out of 6) in a cohort, the decision to proceed to the next planned dose level will need to be evaluated by the DRT.

At least 6 participants eligible for the Dose Determining Set (DDS) are planned to be enrolled per dose escalation cohort with up to 2 cohorts per age group. With up to 2 age groups being considered, a total of up to 24 participants are to be included in the DDS.

To minimize safety risk to participants, best supportive care will be available, including RBC transfusions, iron-chelating agents, use of antibiotic therapy, antiviral and antifungal therapy, and/or nutritional support as needed.

• Study Type: Interventional
• Enrollment (Estimated): 99
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: BMS Study Connect Contact Center www.BMSStudyConnect.com; Phone Number: 855-907-3286; Email: Clinical.Trials@bms.com
• Study Contact Backup: Name: First line of email MUST contain NCT # and Site #.

Study Locations

• China
  • Guangzhou, China, 510120
    • Recruiting
    • Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University
    • Contact: Jian-Pei Fang, Site 901; Phone Number: +862081332199
  • Nanning, China, 530021
    • Recruiting
    • The First Affiliated Hospital of Guangxi Medical University
    • Contact: Yongrong Lai, Site 906; Phone Number: +07715356746
  • GX
    • Nanning, GX, China, 530021
      • Recruiting
      • People's Liberation Army The 923rd Hospital
      • Contact: Xiaolin Yin, Site 904; Phone Number: +8613321717899
  • Guangdong
    • Guangzhou, Guangdong, China, 510515
      • Recruiting
      • Southern Medical University Nanfang Hospital
      • Contact: Xiaoqin Feng, Site 902
    • Shenzhen, Guangdong, China, 518028
      • Recruiting
      • Shenzhen Second People's Hospital
      • Contact: Xin Du, Site 905; Phone Number: 13602523722
  • Sichuan
    • Chengdu, Sichuan, China, 610041
      • Recruiting
      • West China Hospital - Sichuan University
      • Contact: Ju Gao, Site 903
• Germany
  • Essen, Germany, 45147
    • Recruiting
    • Universitätsklinikum Essen
    • Contact: Carmen Aramayo-Singelmann, Site 102
  • Ulm, Germany, 89081
    • Recruiting
    • Universitatsklinikum Ulm
    • Contact: Holger Cario, Site 101; Phone Number: +4973150027776
• Greece
  • Athens, Greece, 115 27
    • Recruiting
    • General Children's Hospital "Agia Sophia"
    • Contact: Antonis Kattamis, Site 201; Phone Number: +302107467772 0(000)
• India
  • Kolkata, India, 700094
    • Withdrawn
    • Local Institution - 803
  • Vellore, India, 632004
    • Recruiting
    • Christian Medical College & Hospital
    • Contact: Aby Abraham, Site 804
  • Andhra Pradesh
    • Hyderabad, Andhra Pradesh, India, 500052
      • Recruiting
      • Kamala Hospital and Research Center
      • Contact: Suman Jain, Site 801
  • Maharashtra
    • Mumbai, Maharashtra, India, 400022
      • Recruiting
      • MCGM - Comprehensive Thalassemia Care, Pediatric Hematology-Oncology & BMT Centre, Borivali (E)
      • Contact: Mamta V Manglani, Site 800
    • Nagpur, Maharashtra, India, 440001
      • Recruiting
      • Kingsway Hospitals
      • Contact: Riya Ballikar, Site 805
  • Uttar Pradesh
    • Noida, Uttar Pradesh, India, 201303
      • Recruiting
      • Post Graduate Institute of Child Health
      • Contact: Dr. Nita Radhakrishnan, Site 802; Phone Number: 91-9999041524
• Italy
  • Genoa, Italy, 16128
    • Recruiting
    • Ente Ospedaliero Ospedali Galliera - Centro della Microcitemia e delle Anemie Congenite
    • Contact: Manuela Balocco, Site 303; Phone Number: +390105634557
  • Napoli, Italy, 80131
    • Recruiting
    • AOU dell'Universita degli Studi della Campania Luigi Vanvitelli
    • Contact: Silverio Perrotta, Site 302; Phone Number: +0390815665421 0 000
  • Orbassano, Italy, 10043
    • Recruiting
    • Azienda Ospedaliero Universitaria S. Luigi Gonzaga
    • Contact: Giovanni Battista Ferrero, Site 301
  • Roma
    • Rome, Roma, Italy, 00165
      • Recruiting
      • Ospedale Pediatrico Bambino Gesù IRCCS
      • Contact: Franco Locatelli, Site 304; Phone Number: 390668593697
• Lebanon
  • Beirut, Lebanon
    • Withdrawn
    • Local Institution - 700
• Thailand
  • Bangkok, Thailand, 10330
    • Recruiting
    • Chulalongkorn University Faculty of Medicine - King Chulalongkorn Memorial Hospital
    • Contact: Darintr Sosothikul, Site 503
  • Bangkok, Thailand, 10700
    • Recruiting
    • Siriraj Hospital Mahidol University
    • Contact: Vip Viprakasit, Site 501; Phone Number: 6624122113
  • Phyathai, Thailand, 10400
    • Recruiting
    • Ramathibodi Hospital, Mahidol University
    • Contact: Duantida Songdej, Site 502
• Turkey (Türkiye)
  • Izmir, Turkey (Türkiye), 35100
    • Completed
    • Local Institution - 401
• United States
  • California
    • Los Angeles, California, United States, 90027
      • Completed
      • Local Institution - 601
  • New York
    • New York, New York, United States, 10065-4870
      • Recruiting
      • New York Presbyterian Hospital
      • Contact: Sujit Sheth, Site 602; Phone Number: 212-746-3400

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 6 years to 18 years (Child)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria

• Participants must be 6 years to < 18 years of age at the time of signing the informed consent form (ICF)/informed assent form (IAF).
• Participants (and when applicable, parent/legal representative) must understand and voluntarily sign an ICF/IAF prior to conducting any study-related assessments/procedures.
• Participants (and when applicable, parent/legal representative) is willing and able to adhere to the study visit schedule and other protocol requirements.
• Participants must have documented diagnosis of β-thalassemia or Hemoglobin E/β-thalassemia.

• Transfusion dependence (TD):

  a. TD participant i. Participant is regularly transfused, defined as: ≥ 4 RBC transfusion events in the 24 weeks prior to enrollment with no transfusion-free period ≥ 42 days during that period.

Note: For the purpose of the study, transfusions administered over 2 or 3 consecutive days are considered as part of a single transfusion event. Participant must have a history of regular transfusions for at least 2 years.

b. NTD participant (ex-US sites only) i. Participant must have received < 4 RBC transfusion events in the 24 weeks prior to enrollment.

ii. Participant must not be on a regular transfusion program and must be RBC transfusion-free for at least 8 weeks prior to enrollment.

iii. Participant must have mean baseline hemoglobin ≤ 10 g/dL, based on a minimum of 2 measurements ≥ 1 week apart within 4 weeks prior to enrollment; hemoglobin values within 21 days post- transfusion will be excluded.

• Participants have Karnofsky (age ≥16 years) or Lansky (age < 16 years) performance status score ≥ 50 at screening.
• Female children of childbearing potential (FCCBP), individuals of childbearing potential (IOCBP), and male (as assigned at birth) participants that have reached puberty (and when applicable, parent/legal representative) must agree to undergo physician-approved reproductive education and discuss the side effects of the study therapy on reproduction.
• Female children of childbearing potential, defined as females who have achieved menarche and/or breast development in Tanner Stage 2 or greater and have not undergone a hysterectomy or bilateral oophorectomy and individuals of childbearing potential (IOCBP) defined as a sexually mature woman who has achieved menarche at some point, has not undergone a hysterectomy or bilateral oophorectomy and has not been naturally postmenopausal for at least 24 consecutive months (ie, has had menses at any time in the preceding 24 consecutive months) must meet the following conditions below (Note: Secondary amenorrhea from any cause does not rule out childbearing potential):
• Medically supervised serum pregnancy tests with a sensitivity of at least 25 mIU/mL must be conducted in Female children of childbearing potential (FCCBP)/ individuals of childbearing potential (IOCBP), including those who commit to complete abstinence. Female children of childbearing potential/ individuals of childbearing potential (IOCBP) must have 2 negative pregnancy tests as verified by the Investigator prior to starting study therapy (one of these tests should be performed by central laboratory). Female children of childbearing potential/ individuals of childbearing potential (IOCBP) must agree to ongoing pregnancy testing during the course of the study at the End of Treatment (EOT) visit and at the 9-week Safety Follow-up visit.
• Female participants must, as appropriate to age and at the discretion of the site Investigator, either commit to true abstinence* from heterosexual contact (which must be reviewed on a monthly basis) or agree to use, and be able to comply with, effective** contraception without interruption, 28 days prior to starting IP, during the study therapy (including dose interruptions), and for 12 weeks (approximately 5 times the mean terminal t1/2 of luspatercept based on multiple-dose PK data) after discontinuation of study therapy.

• Male (as assigned at birth) participants, as appropriate to age and the discretion of the study physician:

  • Must practice true abstinence* (which must be reviewed on a monthly basis) or agree to use a synthetic or latex condom during sexual contact with a pregnant female or a Female children of childbearing potential (FCCBP)/ IOCBP while participating in the study, during dose interruptions and for at least 12 weeks (approximately 5 times the mean terminal t1/2 of luspatercept based on multiple-dose PK data) following IP discontinuation, even if he has undergone a successful vasectomy.

    • True abstinence is acceptable when this is in line with the preferred and usual lifestyle of the participant. [Periodic abstinence (eg, calendar, ovulation, symptothermal, post-ovulation methods) and withdrawal are not acceptable methods of contraception.] ** Agreement to use highly effective methods of contraception that alone or in combination result in a failure rate of a Pearl index of less than 1% per year when used consistently and correctly throughout the course of the study. Such methods include: Combined (estrogen and progesterone/progestin containing) hormonal contraception: Oral; Intravaginal; Transdermal; Progestogen/progestin only hormonal contraception associated with inhibition of ovulation: Oral; Injectable hormonal contraception; Implantable hormonal contraception; Placement of an intrauterine device (IUD); Placement of an intrauterine hormone-releasing system (IUS); Bilateral tubal occlusion; Vasectomized partner; Sexual Abstinence.

Exclusion Criteria

• Participant has a diagnosis of Hemoglobin S/β-thalassemia or alpha (α)-thalassemia (eg, Hemoglobin H); β-thalassemia combined with α-thalassemia is allowed.
• Participant has of active hepatitis C (HCV) infection, as demonstrated by a positive HCF-ribonucleic acid (RNS) test of sufficient sensitivity, or active infectious hepatitis B (as demonstrated by the presence of hepatitis B surface antigen (HBsAG) and/or hepatitis B virus (HBV)-deoxyribonucleic acid (DNA) positive, or known positive human immunodeficiency virus (HIV).

Note: Participants receiving antiviral therapies should have 2 negative HCV-RNA tests 3 months apart before ICF/IAF signature, ie, one test at the end of the antiviral therapy and the second test 3 months following the first test.

• Participant has deep vein thrombosis (DVT), stroke, or other thromboembolic event(s) (except clogged indwelling catheter) requiring medical intervention ≤ 24 weeks prior to enrollment.
• Participant has platelet count > 1000 x 109/L.
• Participant has treatment with another investigational drug or device ≤ 28 days prior to enrollment.
• Participant has prior exposure to sotatercept (ACE-011) or luspatercept (ACE-536).
• Participant underwent or is scheduled for HSCT or gene therapy.
• Participant use of iron chelation therapy (ICT), if initiated ≤ 8 weeks prior to enrollment (allowed if initiated > 8 weeks before or during treatment).
• Participant received treatment with hydroxyurea immunomodulatory drugs IMiDs (such as thalidomide), other fetal Hb (HbF) inducers or erythropoiesis-stimulating agents (ESAs) ≤ 12 weeks prior to enrollment for NTD participants and ≤ 24 weeks for TD participants.
• Participant is pregnant or breastfeeding female or plan to get pregnant during the study.
• Participant has uncontrolled hypertension. Controlled hypertension for this protocol is considered: blood pressure value corresponding to ≤ Grade 1 according to NCI CTCAE version 5.0 with or without pharmacological treatment.

• Participant has major organ damage, including:

  1. Symptomatic splenomegaly
  2. Liver disease with alanine aminotransferase (ALT)/aspartate aminotransferase (AST) > 3X the upper limit of normal (ULN) for age
  3. Heart disease, heart failure as classified by the New York Heart Association (NYHA) classification 3 or higher, or significant arrhythmia requiring treatment, or recent myocardial infarction within 6 months of enrollment
  4. Lung disease, including pulmonary fibrosis or pulmonary hypertension of Grade ≥ 3 according to NCI-CTCAE version 5.0.
  5. Renal insufficiency defined as:
• A serum creatinine based on age/gender based on threshold derived from Schwartz formula for estimating GFR utilizing child length and stature data published by the Centers for Disease Control.
• Participant has proteinuria ≥ Grade 3 according to NCI CTCAE version 5.0 (which is equivalent to a urine protein/creatinine ratio > 215 mg/mmol of creatinine), or a urine albumin/creatinine ratio > 129 mg/mmol of creatinine.
• Participant use of high dose long-term therapy with systemic glucocorticoids ≤ 12 weeks prior to enrollment (physiologic replacement therapy for adrenal insufficiency is allowed). Low-dose long-term (defined as ≤ 0.2 mg/kg/day or ≤ 10 mg/day of prednisone equivalent), short treatment (eg, for prevention or treatment of transfusion reactions) inhaled, intranasal and topical corticosteroids are allowed.
• Participant has history of severe allergic or anaphylactic reactions or hypersensitivity to recombinant proteins or excipients in the IP (refer to the IB).
• Participant use of cytotoxic agents, immunosuppressants ≤ 28 days prior to enrollment (ie, antithymocite globulin (ATG) or cyclosporine).

• Participant has history of malignancy with the exception of:

  1. Curatively resected nonmelanoma skin cancer.
  2. Curatively treated carcinoma in situ.
  3. Other solid tumor with no known active disease in the opinion of the Investigator.
• Participant who has extramedullary hematopoiesis (EMH) complications or requires treatment to control the growth of EMH masse(s) during the screening period.
• Participants with any medical or psychiatric condition that in the opinion of the investigator would put the participant at unacceptable risk of participating in the study or may impact interpretation of the study results.
• Participants who use herbs or food supplements (eg: Chinese traditional medicine), if, per investigator's judgment, likely to impact the safety and efficacy assessment, for 24 weeks before initiating the study treatment for TD participants, and 12 weeks for NTD participants.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Sequential Assignment
• Masking: None (Open Label)

Number of Arms

9

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Cohort 1: TD Dose Escalation Cohort: 12 to < 18 years Luspatercept 0.75 mg/kg	Drug: ACE-536; Specified dose on specified days; Other Names: Luspatercept; BMS-986346
Experimental: Cohort 2: TD Dose Escalation Cohort: 12 to < 18 years: Luspatercept 1.0 mg/kg	Drug: ACE-536; Specified dose on specified days; Other Names: Luspatercept; BMS-986346
Experimental: Cohort 3: TD Dose Expansion Cohort: 12 to <18 years Luspatercept 1.0 mg/kg	Drug: ACE-536; Specified dose on specified days; Other Names: Luspatercept; BMS-986346
Experimental: Cohort 4: TD Dose Escalation Cohort: 6 to < 12 years Luspatercept 1.0 mg/kg	Drug: ACE-536; Specified dose on specified days; Other Names: Luspatercept; BMS-986346
Experimental: Cohort 5: TD Dose Escalation Cohort: 6 to <12 years Luspatercept 1.2 mg/kg	Drug: ACE-536; Specified dose on specified days; Other Names: Luspatercept; BMS-986346
Experimental: Cohort 6: NTD Dose Confirmation Cohort: 12 to < 18 years Luspatercept 1.0 mg/kg	Drug: ACE-536; Specified dose on specified days; Other Names: Luspatercept; BMS-986346
Experimental: Cohort 7: NTD Dose Expansion Cohort: NTD 12 to < 18 years	Drug: ACE-536; Specified dose on specified days; Other Names: Luspatercept; BMS-986346
Experimental: Cohort 8: NTD Dose Escalation Cohort: 6 to < 12 years Luspatercept 1.0 mg/kg	Drug: ACE-536; Specified dose on specified days; Other Names: Luspatercept; BMS-986346
Experimental: Cohort 9: NTD Dose Escalation Cohort: 6 to < 12 years Luspatercept 1.2 mg/kg	Drug: ACE-536; Specified dose on specified days; Other Names: Luspatercept; BMS-986346

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Pharmacokinetics - Cmax	Maximum serum concentration of drug	Time from Cycle 1 Day 1 of Treatment Period up to a maximum of 1 year
Pharmacokinetics - AUC	Area under the curve	Time from Cycle 1 Day 1 of Treatment Period up to a maximum of 1 year
Pharmacokinetics (PK) - t1/2	Half-life	Time from Cycle 1 Day 1 of Treatment Period up to a maximum of 1 year
Pharmacokinetics (PK) - CL/F	Apparent oral clearance	Time from Cycle 1 Day 1 of Treatment Period up to a maximum of 1 year
Pharmacokinetics (PK) - Vd/F	Apparent volume of distribution	Time from Cycle 1 Day 1 of Treatment Period up to a maximum of 1 year
Determination of the Recommended Dose (RD	Determine the recommended dose of luspatercept that is safe and tolerable in pediatric participants with transfusion-dependent B-thalassemia or non-transfusion-dependent β-thalassemia	Cycle 1 up to the day before Cycle 2 Day 1 or Study Day 22 if not receiving the second treatment cycle

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Immunogenicity	Frequency of antidrug antibodies (ADA)	Time from Cycle 1 Day 1 of Treatment Period up to a maximum of 1 year
Safety - Incidence of Adverse Events (AEs)	An AE is any noxious, unintended, or untoward medical occurrence that may appear or worsen in a participant during the course of a study. It may be a new intercurrent illness, a worsening concomitant illness, an injury, or any concomitant impairment of the participant's health, including laboratory test values, regardless of etiology. Any worsening (ie, any clinically significant adverse change in the frequency or intensity of a preexisting condition) should be considered an AE	From enrollment until at least 9 weeks after last dose of study treatment
Mean change from baseline in mean daily dose of iron chelation therapy (ICT)	Change from baseline as continuous variable	12 weeks prior to enrollment; Treatment Period and up to End of Treatment including Long-term Treatment Period - Up to 5 years
Mean change from baseline in serum ferritin	Change from baseline as continuous variable	12 weeks prior to enrollment; Treatment Period and up to End of Treatment including Long-term Treatment Period - Up to 5 years
Mean change in Red Blood Cell (RBC) Transfusion Burden for transfusion-dependent β-thalassemia participants	Change from baseline as continuous variable	12 weeks prior to enrollment; Treatment Period and up to End of Treatment including Long-term Treatment Period - Up to 5 years
Mean change in hemoglobin levels for non-transfusion-dependent β-thalassemia participants	Change from baseline as continuous variable	12 weeks prior to enrollment; Treatment Period and up to End of Treatment including Long-term Treatment Period - Up to 5 years

Collaborators and Investigators

• Sponsor: Celgene
• Collaborators: Acceleron Pharma, Inc., a wholly-owned subsidiary of Merck & Co., Inc., Rahway, NJ USA
• Investigators: Study Director: Bristol-Myers Squibb, Bristol-Myers Squibb

Publications and helpful links

Helpful Links

• BMS Clinical Trial Information
• BMS Clinical Trial Patient Recruiting

Study record dates

Study Major Dates

• Study Start (Actual): November 7, 2019
• Primary Completion (Estimated): July 2, 2027
• Study Completion (Estimated): June 11, 2035

Study Registration Dates

• First Submitted: October 2, 2019
• First Submitted That Met QC Criteria: October 28, 2019
• First Posted (Actual): October 29, 2019

Study Record Updates

• Last Update Posted (Estimated): January 6, 2026
• Last Update Submitted That Met QC Criteria: January 2, 2026
• Last Verified: January 1, 2026

More Information

Terms related to this study

• Keywords: Pharmacokinetics; Luspatercept; ACE-536; Beta-Thalassemia; Red Blood Cell Transfusion
• Additional Relevant MeSH Terms: Genetic Diseases, Inborn; Hematologic Diseases; Anemia, Hemolytic, Congenital; Anemia, Hemolytic; Anemia; Hemoglobinopathies; Thalassemia; Congenital, Hereditary, and Neonatal Diseases and Abnormalities; Hemic and Lymphatic Diseases; beta-Thalassemia; Hematinics; luspatercept
• Other Study ID Numbers: ACE-536-B-THAL-004; U1111-1241-4168 (Other Identifier: WHO); 2022-502499-22 (Other Identifier: EU CT Number)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES

IPD Plan Description

Information relating to our policy on data sharing and the process for requesting data can be found at the following link:

https://www.celgene.com/research-development/clinical-trials/clinical-trials-data-sharing/

• IPD Sharing Time Frame: See Plan Description
• IPD Sharing Access Criteria: See Plan Description
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP; ICF; ANALYTIC_CODE; CSR

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No