Study of Safety & PK of Luspatercept (ACE-536) in Pediatric Participants With Beta (β)-Thalassemia
Public ClinicalTrials.gov record NCT04143724. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Phase 2a Study to Evaluate the Safety and Pharmacokinetics of Luspatercept (ACE-536) in Pediatric Participants With Beta (β)-Thalassemia
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
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. If neither commercial treatment nor an LTFU (long-term follow-up) protocol is available at that time, continued treatment will be provided within this study or via an alternative mechanism, at the Sponsor's discretion.
Study identification
- NCT ID
- NCT04143724
- Recruitment status
- Recruiting
- Study type
- Interventional
- Phase
- Phase 2
- Enrollment
- 99 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 6 Years to 17 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Nov 6, 2019
- Primary completion
- Jan 30, 2028
- Completion
- Aug 30, 2035
- Last update posted
- Jul 9, 2026
2019 – 2035
United States locations
- U.S. sites
- 2
- U.S. states
- 2
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Local Institution - 601 | Los Angeles | California | 90027 | Completed |
| New York Presbyterian Hospital | New York | New York | 10065-4870 | Recruiting |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
Non-U.S. locations
This page focuses on the U.S. directory. The official record also lists 24 non-U.S. sites.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04143724, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 9, 2026 · Synced Sep 17, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04143724 live on ClinicalTrials.gov.