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A Pilot Study of HSCT for Patients With High-risk Hemoglobinopathy Using a Nonmyeloablative Preparative Regimen

NCT00427661 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 8

Last updated 2016-08-18

Study results available
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Summary

Hypothesis 1: A novel nonmyeloablative condition regimen will be safe and efficacious in producing stable donor chimerism and cure of severe hemoglobinopathy.

Hypothesis 2: Stable donor chimerism will result in amelioration of cerebral vasculopathy, improved cerebral perfusion and neurocognitive function.

Specific Aim 1: Study the safety and efficacy of a novel non-toxic conditioning regimen for HSCT for patients with severe hemoglobinopathies and the kinetics of lineage specific chimerism after HSCT

We will test our hypothesis that a novel nonmyeloablative condition regimen will be safe and efficacious in producing stable donor chimerism and cure of severe hemoglobinopathy:

Specific Aim 2: Optimize the immunosuppressive regimen for HSCT patients through a thorough understanding of the pharmacokinetics of Busulfan (BU) and mycophenolate mofetil (MMF) in the patient population. This will involve:

1. Determine the pharmacokinetics of intravenously and orally administered MMF and intravenous BU in patients receiving HSCT.
2. Determine the relationship of Area under the curve (AUC) of BU and mean trough concentrations of mycophenolic acid (MPA) to engraftment and graft versus host disease (GVHD).
3. Determine the relationship of Area under the curve (AUC) and steady state concentration of BU to engraftment at day 30 and 1 year post HSCT.

Specific Aim 3: Study the effect of complete or partial donor chimerism on silent and overt cerebral vasculopathy, and neurocognitive functioning in patients with SCD undergoing HSCT. We will test our hypothesis that stable donor chimerism will result in improvement in cerebral vasculopathy and neurocognitive function. This will include.

1. Determine effect of transplantation silent and overt cerebral vasculopathy by comparison MRA and TCD 1 year after HSCT to pre-HSCT studies.
2. Determine effect on HSCT on neurocognitive function. Specific Aim 4: To determine the rate of T cell immune reconstitution in children with sickle cell disease following myeloablative compared to nonmyeloablative stem cell transplantation, using immunophenotyping assays, CDR3 spectratyping TREC analysis, and measurement of T cell specific donor engraftment.

Conditions

Interventions

OTHER

Busulfan; Fludarabine; cyclosporine A and MMF

Hematopoietic stem cell transplantation from a matched sibling or unrelated donor following a reduced intensity conditioning regimen

Sponsors & Collaborators

  • University of Pittsburgh

    lead OTHER

Principal Investigators

  • Lakshmanan Krishnamurti, MD · Children's Hospital Medical Center, Cincinnati

Study Design

Allocation
NA
Purpose
TREATMENT
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
3 Years
Max Age
35 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2002-06-30
Primary Completion
2014-05-31
Completion
2014-05-31

Countries

  • United States

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00427661 on ClinicalTrials.gov