- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04476277
Red Cell Half Life Determination in Patients With and Without Sickle Cell Disease
Background:
Sickle cell disease (SCD) is an inherited blood disorder. It results from a single genetic change (mutation) in red blood cells (RBCs). RBCs are the cells that carry oxygen to the body. In people with SCD, some RBCs are abnormal and die early. This leaves a shortage of healthy RBCs. Researchers want to learn more about how long RBCs live in the human body.
Objective:
To study how long RBCs live in people with and without SCD.
Eligibility:
People age 18 and older who either have SCD, had SCD but were cured with a bone marrow transplant, have the sickle cell trait (SCT), or are a healthy volunteer without SCD or SCT
Design:
Participants will be screened with a medical history and physical exam. They will give a blood sample.
Participants will have a small amount of blood drawn from a vein. In the laboratory, the blood will be mixed with a vitamin called biotin. Biotin sticks to the outside of RBCs without changing their function, shape, or overall lifetime. This process is known as biotin labeling of RBCs. The biotin labeled RBCs will be returned to the participant via vein injection.
Participants will give frequent blood samples. Their RBCs will be studied to see how many biotin labeled RBCs remain over time. This shows how long the RBCs live. Participants will give blood samples until no biotin labeled RBCs can be detected.
During the study visits, participants will report any major changes to their health.
Participation lasts for up to 6 months.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Study Description:
This study will use biotin-labeling of red blood cells (RBCs) to determine the mean potential lifespan (MPL) of RBCs in patients with sickle cell disease (SCD) compared to patients who have successfully undergone curative bone marrow transplantation (BMT, allogeneic or autologous), participants with sickle cell trait, and healthy donors without SCD. Previous studies have corroborated the MPL of healthy donor RBCs to be approximately 115 days while RBCs from patients with SCD have a much more variable but consistently shorter MPL of approximately 32 days. Allogeneic BMT is a curative therapy for the treatment of severe SCD with stable, mixed donor recipient chimerism after BMT sufficient to reverse the sickle cell phenotype by virtue of improved donor red cell survival compared to the ineffective erythropoiesis of SCD. We predict that the hematologic variables associated with red cell survival among patients with SCD vs. participants with SCT and healthy donors can be used to determine the necessary amount of corrected hemoglobin required to overcome the red cell pathology of SCD. Data generated will be used to determine the utility of performing a population study of RBC lifespan in gene therapy treated patients to ultimately target the percentage of transferred globin gene needed to reverse SCD. The data generated will refine our understanding of the degree of correction necessary to reverse the phenotype of SCD.
Objectives:
Primary Objective: To determine and compare red blood cell survival in patients with SCD, patients with SCD who have undergone BMT, participants with SCT, and healthy donors, and validate the association of red cell survival with known markers of increased red cell survival.
Secondary Objectives: To evaluate correlation of markers of hemolysis (reticulocyte count), number of alpha globin genes, and fetal hemoglobin with RBC survival.
Endpoints:
Primary Endpoint: Red blood cell survival
Secondary Endpoints: Relationship of red blood cell survival to hematologic parameters. Antibody detection to biotin.
Study Type
Enrollment (Actual)
Phase
- Early Phase 1
Contacts and Locations
Study Locations
-
-
Maryland
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Bethesda, Maryland, United States, 20892
- National Institutes of Health Clinical Center
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
INCLUSION CRITERIA:
- Age 18 or greater with a confirmed diagnosis of homozygous SCD (HbSS, HbSC, HbSB0), sickle cell trait (HbAS), or healthy volunteer (HbA)
- Normal renal function: creatinine <1.5 mg/dL
- Negative direct antiglobulin test (DAT)
- Ability to give informed consent to participate in the protocol
EXCLUSION CRITERIA:
- Any uncontrolled chronic illness other than sickle cell disease
- Active viral, bacterial, fungal, or parasitic infection
- Consumption of biotin supplements or raw eggs within 30 days
- Blood loss within the previous 8 weeks >540mL
- Pregnancy
- Pre-existing, naturally occurring antibodies against biotin
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Non-Randomized
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Sickle Cell Disease Pre-Transplantation
Autologous cells will be collected in participants with Sickle Cell Disease Pre-Transplantation and biotin-labeled ex vivo and reinfused to measure red cell survival
|
Autologous cells will be collected and biotin-labeled ex vivo and reinfused to measure red cell survival
|
Experimental: Sickle Cell Disease Post-Transplantation
Autologous cells will be collected in participants with Sickle Cell Disease Post-Transplantation and biotin-labeled ex vivo and reinfused to measure red cell survival
|
Autologous cells will be collected and biotin-labeled ex vivo and reinfused to measure red cell survival
|
Experimental: Sickle Cell Trait (HbAS)
Autologous cells will be collected in participants with Sickle Cell Trait (HbAS) and biotin-labeled ex vivo and reinfused to measure red cell survival
|
Autologous cells will be collected and biotin-labeled ex vivo and reinfused to measure red cell survival
|
Experimental: HbAA (Healthy volunteers)
Autologous cells will be collected in participants with HbAA (Healthy volunteers) and biotin-labeled ex vivo and reinfused to measure red cell survival
|
Autologous cells will be collected and biotin-labeled ex vivo and reinfused to measure red cell survival
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mean Red Blood Cells Lifespan in Participants
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Days of Red Blood Cells (RBC) survival in participants with Sickle Cell Disease (SCD), participants with SCD who have undergone stem cell transplant, participants with Sickle Cell Trait, and healthy volunteers. Peripheral blood samples were analyzed by flow cytometry until biotin was not detectable on RBC. |
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of Participants With Antibody Detection
Time Frame: Baseline, 3 months, 6 months
|
Number of participants with Antibody detection to biotin
|
Baseline, 3 months, 6 months
|
Mean White Blood Cell Count
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean White Blood Cell (WBC) count between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Red Blood Cell Count
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Red Blood Cell (RBC) Count between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Hemoglobin Value
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Hemoglobin (Hb) Value between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Hematocrit Value
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Hematocrit (Hct) value between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Value of Mean Corpuscular Volume
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Value of Mean Corpuscular Volume (MCV) between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Absolute Reticulocyte Count
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Absolute Reticulocyte Count (ARC) between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Aspartate Aminotransferase Value
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Aspartate Aminotransferase (AST) value between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Total Bilirubin Value
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Total Bilirubin value between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Lactate Dehydrogenase Value
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Lactate Dehydrogenase (LDH) value between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Adult Hemoglobin Percentage
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Adult Hemoglobin (HbA) percentage between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Sickle Hemoglobin Percentage
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Sickle Hemoglobin (HbS) Percentage between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Fetal Hemoglobin Percentage
Time Frame: Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Mean Fetal Hemoglobin (HbF) Percentage between Sickle Cell Disease Pre-transplantation and Sickle Cell Disease Post-Transplantation
|
Sickle Cell Disease Pre-Transplantation cohort time frame is as follows: baseline, twice weekly up to week 3 then weekly up to week 22. All other cohorts, time frame is as follows: baseline, weekly up to week 4, then every other week up to week 22.
|
Collaborators and Investigators
Investigators
- Principal Investigator: John F Tisdale, M.D., National Heart, Lung, and Blood Institute (NHLBI)
Publications and helpful links
Helpful Links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 200080
- 20-H-0080
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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