RecruitingPhase 1/2

Partial Stem Cell Transplant for Sickle Cell Disease From Matched Donors

United States90 participantsStarted 2026-07-01

Plain-language summary

This is a non-ablative (partial) stem cell transplant for patients with severe sickle cell disease or beta-thalassemia requiring red cell transfusions. The intensity of the transplant is slightly increased from our previous transplant regimens. The goal is to aim for higher percentage of donor cells to stably remain in the recipients long term.

Who can participate

Age range

4 Years – 65 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion criteria

. Patients with sickle cell disease at high risk for disease related morbidity or mortality, defined by having an end-organ damage (A, B, C, D, OR E) or complication(s) not ameliorated by sickle cell-specific therapies (F):
. Patients with beta-thalassemia who have grade 2 or 3 iron overload, determined by the presence of 2 or more of the following:
. Non disease specific

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Donor myeloid chimerism

Timeframe: 1 year

Trial details

NCT IDNCT07599176

SponsorNational Heart, Lung, and Blood Institute (NHLBI)

Sponsor typeNIH

Study typeINTERVENTIONAL

Primary completion2032-06-30

Contact for this trial

Kelly S Norris, R.N.

(301) 529-7104 kelly.norris@nih.gov

View on ClinicalTrials.gov More Sickle Cell Disease trials