Red Blood Cell - IMProving trAnsfusions for Chronically Transfused Recipients (RBC-IMPACT)
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ClinicalTrials.gov Identifier: NCT05255445 |
Recruitment Status :
Recruiting
First Posted : February 24, 2022
Last Update Posted : March 21, 2022
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Condition or disease | Intervention/treatment |
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Sickle Cell Disease Thalassemia Pediatric Cancer | Biological: Red Blood Cell (RBC) Transfusion |
Study Type : | Observational |
Estimated Enrollment : | 500 participants |
Observational Model: | Cohort |
Time Perspective: | Prospective |
Official Title: | Red Blood Cell - IMProving trAnsfusions for Chronically Transfused Recipients (RBC-IMPACT) |
Actual Study Start Date : | March 16, 2022 |
Estimated Primary Completion Date : | March 2024 |
Estimated Study Completion Date : | March 2025 |

Group/Cohort | Intervention/treatment |
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Sickle cell disease (SCD)
Patients with SCD who are chronically transfused (in the U.S. and Brazil)
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Biological: Red Blood Cell (RBC) Transfusion
Simple RBC transfusion |
Thalassemia
Patients with thalassemia who are chronically transfused in the U.S.
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Biological: Red Blood Cell (RBC) Transfusion
Simple RBC transfusion |
Pediatric Hematology-Oncology
Patients in U.S. with pediatric oncologic diagnoses with hypo-proliferative bone marrow requiring single unit red blood cell transfusion
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Biological: Red Blood Cell (RBC) Transfusion
Simple RBC transfusion |
Blood Donors
Allogenic blood donors in the US (estimated: 10,200) and allogenic blood donors in Brazil (estimated: 2,100) with extended donation genotyping using an investigational hematology array.
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- Change in Hemoglobin A or Hemoglobin Level per day (RBC Survival) [ Time Frame: Baseline (immediately pre-) to post-transfusion over 2 years ]Change in hemoglobin A or hemoglobin level per day in between subsequent transfusion episodes, for sickle cell disease and thalassemia cohorts, respectively
- Change in Serum Iron Level [ Time Frame: Baseline (immediately before) and 2-hours after transfusion ]For all groups participating, change in serum iron measured from immediately prior to 2 hours post-transfusion
- Hemoglobin Increment [ Time Frame: Baseline (immediately pre-) to post-transfusion, over 2 years ]Hemoglobin increment [defined as Hb/HbA(post-transfusion)visit(i) - Hb/HbA(pre-transfusion)visit(i)] is associated with "RBC survival"
- Hemolysis Parameter Increment [ Time Frame: Baseline (immediately pre-) to post-transfusion or 2-hours post-transfusion, over 2 years ]Includes serum iron, indirect bilirubin, or plasma free hemoglobin
- Hepcidin Level [ Time Frame: Baseline (immediately before) to 2 hours after transfusion ]Hepcidin level at time of transfusion is a predictor of change in iron parameters (i.e., transferrin saturation, serum iron) following transfusion
- Non-Transferrin-Bound Iron (NTBI) Level [ Time Frame: Baseline (immediately before) to 2 hours after transfusion ]NTBI levels in patients with pediatric oncologic diagnoses with aplasia are elevated at baseline and increase following transfusion
- Number of Clinical Complications [ Time Frame: 2 years ]Increased NTBI, serum iron, or transferrin saturation following transfusion is associated with increased risk of clinical adverse effects (i.e., new infections, SCD complications)
- Rate of Alloimmunization [ Time Frame: 2 years ]Rate of new alloantibody formation
- 4-hydroxynonenal [4-HNE] [ Time Frame: 2 years ]Recipient oxidative stress pre-transfusion is associated with "RBC survival"
- Type I interferon (i.e., MxA protein assay) and other cytokines (i.e., IL-6, MCP-1, IFNgamma) [ Time Frame: 2 years ]Recipient inflammation pre-transfusion is associated with "RBC survival"
- Number of Transfusion Reactions [ Time Frame: 2 years ]Transfusion reactions are associated with "RBC survival"
Biospecimen Retention: Samples Without DNA
Specimens to be stored for future use from enrolled red cell transfusion recipients include whole blood, plasma and serum.
The study will also retain a sample of packed RBCs from the transfused RBC unit, and a retention tube from the donor of that transfused unit (to be used for extended genotyping but not retained in a long-term biorepository).

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: | Child, Adult, Older Adult |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Sampling Method: | Non-Probability Sample |
All transfused patients with sickle cell disease (in the U.S or Brazil) and thalassemia on simple chronic transfusion from hospitals affiliated with REDS-IV-P Domestic hubs or Brazil hemocenters. (Aim #1)
Chronically transfused patients with sickle cell disease or thalassemia, and patients with pediatric oncology diagnoses with hypo-proliferative bone marrow receiving care at hospitals affiliated with REDS-IV-P Domestic hubs or Brazil hemocenters (for SCD only). (Aim #2).
Inclusion Criteria (Aim #1):
- Well-characterized transfusion-dependent form of SCD or thalassemia (including Hemoglobin E-thalassemia and sickle-beta thalassemia) on chronic simple transfusion therapy
- On a regular simple RBC transfusion schedule (i.e., 1-3 units scheduled every 2-6 weeks and on a minimum 6-month chronic transfusion trial)
- Seen at any participating domestic hub hospital (i.e., Columbia University Irving Medical Center/Morgan Stanley Children's Hospital of New York, Weill Cornell Medical Center/Komansky Children's Hospital, Boston Children's Hospital, Froedtert & Medical College of Wisconsin/Children's Wisconsin, University of California San Francisco, Benioff Children's Hospital Oakland) or enrolled in the Brazil REDS-IV-P sickle cell disease cohort and seen at any participating Brazil hemocenter (i.e., Childrens Institute and Adult Clinics at Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - HCFMUSP, HEMOAM - Amazonas, HEMOMINAS - Minas Gerais, HEMOPE -Pernambuco, and HEMORIO - Rio de Janeiro)
Exclusion Criteria (Aim #1):
- Institutionalization or imprisonment
- Foster care
Inclusion criteria (Aim #2):
- Either included in Aim #1 (consented patient with SCD or thalassemia) or patient with pediatric oncologic diagnosis under care in a pediatric hematology/oncology service with anemia due to chemotherapy or primary/secondary hypo-proliferative bone marrow requiring a RBC transfusion (including HSCT)
- [In domestic study only] Age ≤21 years old (many pediatric services include care of patients up to age 21, therefore the protocol will not limit by age but instead on whether they are seen in a pediatric service)
- Planned transfusion of RBC from an aliquot or unit from a single donor
- Seen at any participating domestic hub hospital (i.e., Columbia University Irving Medical Center/Morgan Stanley Children's Hospital of New York, Weill Cornell Medical Center/Komansky Children's Hospital, Boston Children's Hospital, Froedtert & Medical College of Wisconsin/Children's Wisconsin, University of California San Francisco, Benioff Children's Hospital Oakland) or at any REDS-IV-P participating Brazil hemocenter (i.e., Childrens Institute and Adult Clinics at Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo - HCFMUSP, HEMOAM - Amazonas, HEMOMINAS - Minas Gerais, HEMOPE -Pernambuco, and HEMORIO - Rio de Janeiro).
Exclusion criteria (Aim #2):
- Institutionalization or imprisonment
- Foster care
- Current active auto-immune hemolytic anemia based on positive direct antiglobulin test (DAT) with laboratory evidence of hemolysis and increased transfusion requirement
- [In domestic study only] Microangiopathic hemolytic anemia

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): NCT05255445
Contact: Kathy Chapman, MT | 301-738-3697 | KathyChapman@westat.com | |
Contact: Sunitha Mathew, MPH | 301-294-4472 | SunithaMathew@westat.com |
United States, California | |
UCSF Benioff Children's Hospital | Recruiting |
Oakland, California, United States, 94609 | |
Contact: Shannon Kelly, MD shannon.kelly@ucsf.edu | |
Vitalant Research Institute | Not yet recruiting |
San Francisco, California, United States, 94118 | |
Contact: Brian Custer, PhD, MPH bcuster@vitalant.org | |
United States, Massachusetts | |
Boston Children's Hospital | Not yet recruiting |
Boston, Massachusetts, United States, 02115 | |
Contact: John Manis, MD john.manis@childrens.harvard.edu | |
United States, New York | |
Weill Cornell Medical Collection (WCMC)/New York Presbyterian Hospital (NYPH) | Not yet recruiting |
New York, New York, United States, 10021 | |
Contact: Melissa Cushing, MD mec2013@med.cornell.edu | |
Columbia University Irving Medical Center/New York Presbyterian Hospital (NYPH) | Not yet recruiting |
New York, New York, United States, 10032 | |
Contact: Eldad A Hod, MD eh2217@cumc.columbia.edu | |
New York Blood Center (NYBC) | Not yet recruiting |
New York, New York, United States, 10065 | |
Contact: Bruce Sachais, MD, PhD bsachais@nybc.org | |
United States, Wisconsin | |
Children's Wisconsin | Not yet recruiting |
Milwaukee, Wisconsin, United States, 53226 | |
Contact: Brian Branchford, MD bbranchford@versiti.org | |
Froedtert Hospital | Not yet recruiting |
Milwaukee, Wisconsin, United States, 53226 | |
Contact: Lisa Baumann Kreuziger, MD, MS lisakreuziger@versiti.org | |
Versiti Wisconsin, Inc. | Not yet recruiting |
Milwaukee, Wisconsin, United States, 53233 | |
Contact: Alan Mast, MD, PhD aemast@versiti.org | |
Brazil | |
HEMOAM - Amazonas | Not yet recruiting |
Manaus, Amazonas, Brazil, 69050-001 | |
Contact: Nelson A Fraiji, MD, PhD nfraiji@hemoam.am.gov.br | |
HEMOMINAS - Minas Gerais | Not yet recruiting |
Belo Horizonte, Minas Gerais, Brazil, 30622-020 | |
Contact: André Belisário, PhD andrebelisario@yahoo.com.br | |
HEMOPE - Pernambuco | Not yet recruiting |
Recife, Pernambuco, Brazil, 52011-000 | |
Contact: Paulo Loureiro, MD, PhD paula.loureiro10@gmail.com | |
Contact: Dahra Teles, MD dahra.teles@gmail.com | |
HEMORIO - Rio De Janeiro | Not yet recruiting |
Rio De Janeiro, Brazil, 20211-030 | |
Contact: Luiz Amorim, MD, PhD luizamorimfilho@gmail.com | |
Childrens Institute and Adult Clinics at Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo | Not yet recruiting |
São Paulo, Brazil, 05403-000 | |
Contact: Carla Dinardo, MD, PhD caludinardo@gmail.com | |
Contact: Miriam Park, MD, PhD parkmiriam0@gmail.com |
Principal Investigator: | Eldad A Hod, MD | Columbia University | |
Principal Investigator: | Brian Custer, PhD, MPH | Vitalant Research Institute |
Responsible Party: | Westat |
ClinicalTrials.gov Identifier: | NCT05255445 |
Other Study ID Numbers: |
75N92019D00032 75N92019D00033 ( Other Grant/Funding Number: National Heart, Lung and Blood Institute ) 75N92019D00034 ( Other Grant/Funding Number: National Heart, Lung and Blood Institute ) 75N92019D00035 ( Other Grant/Funding Number: National Heart, Lung and Blood Institute ) 75N92019D00036 ( Other Grant/Funding Number: National Heart, Lung and Blood Institute ) 75N92019D00037 ( Other Grant/Funding Number: National Heart, Lung and Blood Institute ) 75N92019D00038 ( Other Grant/Funding Number: National Heart, Lung and Blood Institute ) |
First Posted: | February 24, 2022 Key Record Dates |
Last Update Posted: | March 21, 2022 |
Last Verified: | March 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Yes |
Plan Description: | De-identified public use datasets will be created and delivered to NHLBI at the end of the study (and end of the REDS-IV-P program) and will be made available indefinitely for future analysis |
Supporting Materials: |
Study Protocol Clinical Study Report (CSR) |
Time Frame: | At the end of the REDS-IV-P program, estimated in March 2026, the public use data sets will be available and will be available indefinitely for future analytic use. |
Access Criteria: | Public use datasets will be posted to NIH/NHLBI data repository systems. |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | No |
Transfusion Red Blood Cell Sickle Cell Disease Thalassemia Pediatric Oncology |
RBC survival Genetic Non-genetic Observational Blood donor |
Anemia, Sickle Cell Thalassemia Anemia, Hemolytic, Congenital Anemia, Hemolytic |
Anemia Hematologic Diseases Hemoglobinopathies Genetic Diseases, Inborn |