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Spots Global Cancer Trial Database for A Pediatric Study of a Plerixafor Containing Regimen In Second Allogeneic Stem Cell Transplantation

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Trial Identification

Brief Title: A Pediatric Study of a Plerixafor Containing Regimen In Second Allogeneic Stem Cell Transplantation

Official Title: A Phase I Pediatric Study of a Plerixafor Containing Regimen In Second Allogeneic Stem Cell Transplantation

Study ID: NCT01068301

Interventions

Plerixafor

Study Description

Brief Summary: Patients with refractory hematologic malignancies, including those who develop recurrent disease after allogeneic hematopoietic stem cell transplantation (HSCT) have a dismal prognosis. Historically, both regimen-related mortality and disease recurrence have been significant causes of treatment failure in this heavily pre-treated patient population. Novel therapeutic agents that target molecular signaling mechanisms and increase the sensitivity of leukemic cells to apoptosis may clearly play a role in this setting. This study hypothesizes that interrupting the SDF-1/CXCR4 axis using the selective CXCR4 antagonist plerixafor may be useful as a leukemic stem cell mobilizing agent for patients who are refractory to standard dose chemotherapy and in relapse after an allogeneic transplant. This hypothesis is based on the dependence of leukemia cells on MSCs for survival signals as described above and on the preclinical data that suggest increased efficacy by antileukemia agents when leukemia cells are separated from MSCs. In the present trial, the study proposes to add plerixafor to enhance the conditioning regimen cytotoxicity. At this time the goal is to determine the maximum tolerated dose (MTD) of plerixafor through the process of dose limiting toxicity (DLT) evaluation. Pharmacokinetic studies will be conducted. Additional studies will quantify and the content of leukemia cells and key regulatory and effector T cell populations in the bone marrow and blood before and after exposure to this medication. If the observed outcomes of this trial are promising, it could serve as a platform on which to study further use of plerixafor as a complimentary agent with conditioning as well as other chemotherapeutic regimens for patients with relapsed or refractory hematologic malignancies.

Detailed Description: This study will determine the following objectives: 1. To determine the dose-limiting toxicity (DLT) and maximum tolerated dose (MTD) of plerixafor in combination with fludarabine, thiotepa, and melphalan as a conditioning regimen for children and young adults undergoing a second allogeneic stem cell transplant (SCT) procedure. 2. The study determines the secondary objectives: * To describe the pharmacokinetic properties of plerixafor in this study population * To estimate the cumulative incidence of relapse and overall survival in study participants at one year after this second transplant procedure 3. Other exploratory objectives include: * To study the correlation between the pharmacokinetic properties of plerixafor and key regulatory and effector T cell populations in blood before and after exposure to plerixafor. * To evaluate the content of leukemia cells in bone marrow and in blood before and after exposure to plerixafor * To evaluate key regulatory and effector T cell populations in bone marrow and in blood before and after exposure to plerixafor

Eligibility

Minimum Age:

Eligible Ages: CHILD, ADULT

Sex: ALL

Healthy Volunteers: No

Locations

St. Jude Children's Research Hospital, Memphis, Tennessee, United States

Contact Details

Name: Ashok Srinivasan, MD

Affiliation: St. Jude Children's Research Hospital

Role: PRINCIPAL_INVESTIGATOR

Useful links and downloads for this trial

Clinicaltrials.gov

Google Search Results

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