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RecruitingAccepts healthy volunteersPhase 1/Phase 2

Repeat Peripheral Blood Stem Cell Transplantation for Patients With Sickle Cell Disease and Falling Donor Myeloid Chimerism Levels

National Heart, Lung, and Blood Institute (NHLBI) · NCT04008368

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Key facts

Compensation
Not posted. Ask the study team before screening.
Who can join
Ages 2–80 · All sexes
Healthy volunteers
Accepted
Study type
Interventional · Phase 1, Phase 2
Target enrollment
32
US sites recruiting
1
Study start
October 24, 2019
Record last updated
October 26, 2026

Status re-checked against ClinicalTrials.gov within the last 12 hours.

What the study is about

Background

Sickle cell disease can often be treated with blood stem cell transplants. But for some people the disease returns. This study will give a second transplant to people whose disease has returned but still have some donor cells in their body.

Objective

To cure people s sickle cell disease by giving a second treatment that makes more room in their bone marrow for donor cells.

Eligibility

People ages 4 and older with sickle cell disease who had a transplant but the disease returned, and their donor relatives. Donors can be 2 years of age or older.

Design

Participants will be screened with medical history, physical exam, and blood tests.

Recipients will also be screened with heart and breathing tests, x-rays, a bone marrow sample, and teeth and eye exams. They must have a caregiver.

Donors will have 7-8 visits. They will take a drug for 5-6 days to prepare them for the donation. For the donation, blood is taken from a vein in the arm or groin. The stem cells are collected. The rest of the blood is returned. This may be repeated.

Recipients will get a long IV line in their arm or chest for about 1-2 months. They will take drugs to help their body accept the donor cells. They will get the donor cells and red blood cell transfusions through the line. They will stay in the hospital about 30 days after the transfusion of donor cells.

In first 3 months after the infusion, recipients will have many visits. Then they will have visits every 6 months to 1 year for 5 years. During those visits they will repeat some of the screening tests....

Being studied: CliniMACS CD34 Reagent

Conditions: Myeloid Chimerism

Eligibility criteria

Copied from the official record. The study team makes the final decision at screening.

Show full criteria
  • INCLUSION CRITERIA:

Inclusion criteria- recipient

  • Patient with history of SCD or beta thalassemia who previously underwent allogeneic hematopoietic stem cell transplantation (HSCT)
  • Patient with recurrent SCD defined as HbS greater than or equal to 50% for donors with sickle cell trait and greater than or equal to 10% for donors with HbAA with recurrent clinical manifestations (for example but not limited to recurrent painful crises, acute chest syndrome, priapism, or severe anemia) or patients with recurrent beta thalassemia defined as clinical manifestations such as transfusion-dependence or evidence of extramedullary hematopoiesis. The HbS requirement may be waived by the PI or designee for reasons such as the patient is requiring chronic transfusion therapy or otherwise meets clinical criteria for return of SCD.
  • Persistent donor chimerism levels
  • Age greater than or equal to 4 years
  • Negative beta-HCG
  • Ejection fraction greater than or equal to 35%
  • DLCO greater than or equal to 35% (Note: This criterion may be omitted in young children (e.g. near the age of 5 years old) or other individuals who may have difficulty understanding or complying with the instructions for accurate testing.)

Inclusion- donor

Related donor from original transplant, deemed suitable and eligible, and willing to donate, per clinical evaluations who are additionally willing to donate blood for research. Related donors will be evaluated in accordance with existing Standard NIH Policies and Procedures for determination of eligibility and suitability for clinical donation. Age >= 2 years \<80 years old

EXCLUSION CRITERIA

Exclusion criteria- recipient

  • ECOG performance status of 3 or more or if \<16 years of age Lansky score of 50 or lower.
  • Evidence of uncontrolled bacterial, viral, or fungal infections (currently taking medication and progression of clinical symptoms) within one month prior to signing the consent
  • Patients with fever or suspected minor infection should await resolution of symptoms before signing the consent
  • Major anticipated illness or organ failure incompatible with survival from PBSC transplant
  • Pregnant or breastfeeding
  • History of secondary malignancies (other than localized skin cancer)
  • Donor-specific HLA antibodies with mean fluorescent intensity >= 2,000

Exclusion- donor

None

Recruiting US locations

  • National Institutes of Health Clinical Center

    Bethesda, MD 20892

    Site contact: For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR) · 800-411-1222 · prpl@cc.nih.gov

Study contacts (from the official record)

  • Julia M Varga, R.N. · (301) 402-3595 · julia.varga@nih.gov
  • Courtney F Joseph, M.D. · (301) 402-6496 · courtney.fitzhugh@nih.gov
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