Transplant conditioning for non-malignant diseases using immune suppression

A Study of Hematopoietic Stem Cell Transplantation (HSCT) in Non-Malignant Disease Using a Reduced-Intensity Preparatory Regime

Phase1; Phase2 Interventional Washington University School of Medicine · NCT00920972

This study is testing a new way to prepare children with non-cancer diseases for a stem cell transplant to see if it helps their bodies accept the donor cells while causing fewer side effects.

Quick facts

PhasePhase1; Phase2
Study typeInterventional
Enrollment220 (estimated)
AgesN/A to 20 Years
SexAll
SponsorWashington University School of Medicine Academic / other
Drugs / interventionschemotherapy, radiation
Locations28 sites (Phoenix, Arizona and 27 other locations)
Trial IDNCT00920972 on ClinicalTrials.gov

What this trial studies

This study investigates a preparative regimen that maximizes host immunosuppression without myeloablation to facilitate the engraftment of donor hematopoietic cells in children with non-malignant disorders. It employs reduced intensity conditioning to minimize early and late toxicities associated with transplant, such as graft versus host disease (GVHD). The trial evaluates the safety and efficacy of this approach by monitoring major toxicities within the first 100 days post-transplantation, utilizing matched and mismatched donor stem cells from both bone marrow and umbilical cord blood sources.

Who should consider this trial

Good fit: Ideal candidates include children under 21 years with specific non-malignant disorders requiring HLA-matched bone marrow or umbilical cord blood transplants.

Not a fit: Patients with HIV, invasive infections, or those who are pregnant or lactating may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could significantly reduce transplant-related toxicities while improving donor cell engraftment in pediatric patients with non-malignant disorders.

How similar studies have performed: Other studies utilizing reduced intensity conditioning for transplant have shown promise, indicating potential for success in this novel approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

Stratum 1: Patient must have non-malignant disorder, excluding thalassemia. Must be receiving a 8/8 HLA-matched bone marrow, related or unrelated Stratum 2: Patient must have thalassemia receiving 8/8 HLA-matched bone marrow or 5-8/8 HLA-matched UCB. Related or unrelated.

Stratum 3: Patient must have a hemoglobinopathy receiving 7/8 HLA-matched bone marrow or 5-8/8 HLA-matched UCB. Related or unrelated.

Stratum 4: Patient must have a non-malignant disorder (excluding hemoglobinopathy) receiving 7/8 HLA-matched bone marrow or 5-8/8 HLA-matched UCB. Related or unrelated.

All strata:

* Recipient age \< 21 years
* Lansky/Karnofsky \>/= 40
* Adequate pulmonary, renal, liver, and other organ function as defined in protocol
* Negative pregnancy test
* Adequate total nucleated cell or CD34+ dose of product as defined in protocol
* If sickle cell, Hemoglobin S \<30%

Exclusion Criteria:

* HIV positive
* Invasive infection
* Pregnancy/lactating

Where this trial is running

Phoenix, Arizona and 27 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Metabolic DisordersHematologic, Immune, or Bone Marrow DisordersHemoglobinopathiesNon-malignant DisordersBone marrowTransplantTransplantationHematopoietic
Last reviewed 2026-06-09 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.