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Haploidentical Stem Cell Transplantation for Patients With Hematologic Malignancies

28 januari 2009 uppdaterad av: St. Jude Children's Research Hospital

Haploidentical Stem Cell Transplantation Utilizing Purified CD34+ Hematopoietic Cells for Patients With Hematologic Malignancies

Blood and marrow stem cell transplant has improved the outcome for patients with high-risk hematologic malignancies. However, most patients do not have an appropriate HLA (immune type) matched sibling donor available and/or are unable to identify an acceptable unrelated HLA matched donor through the registries in a timely manner. Another option is haploidentical transplant using a partially matched family member donor.

Although haploidentical transplant has proven curative in many patients, this procedure has been hindered by significant complications, primarily regimen-related toxicity including graft versus host disease (GVHD) and infection due to delayed immune reconstitution. These can, in part, be due to certain white blood cells in the graft called T cells. GVHD happens when the donor T cells recognize the body tissues of the patient (the host) are different and attack these cells. Although too many T cells increase the possibility of GVHD, too few may cause the recipient's immune system to reconstitute slowly or the graft to fail to grow, leaving the patient at high-risk for significant infection.

This research project will investigate the use of particular pre-transplant conditioning regimen (chemotherapy, antibodies and total body irradiation) followed by a stem cell infusion from a "mismatched" family member donor. Once these stem cells are obtained they will be highly purified in an effort to remove T cells using the investigational CliniMACS stem cell selection device. The primary goal of this study will be to determine the rate of neutrophil and platelet engraftment, as well as the degree and rate of immune reconstitution in the first 100 days posttransplant for patients who receive this study treatment. Researchers will also study ways to decrease complications that may occur with a transplant from a genetically mismatched family donor.

Studieöversikt

Status

Avslutad

Betingelser

Intervention / Behandling

Detaljerad beskrivning

Secondary outcome evaluations for this clinical study include the following:

  • To estimate overall survival, disease free survival and event free survival for these patients
  • To estimate the incidence of grade 2 to 4 acute GvHD in these patients
  • To estimate the incidence of chronic GvHD and graft failure in these patients
  • To estimate the incidence of non-hematologic peri-transplant regimen-related toxicity and regimen-related mortality in the first 100 days after transplantation in these patients
  • To estimate the number of patients who require donor lymphocyte infusions and/or stem cell boosts after transplantation in this group of patients and evaluate its impact on immune reconstitution and engraftment
  • To estimate the number of patients who develop evidence of EBV reactivation or post transplant lymphoproliferative disease (PTLPD) post transplant in this group of patients
  • Describe the pharmacokinetics of rabbit anti-thymocyte globulin (rATG) in patients receiving allogeneic transplantation and determine the frequency of rATG antibody development
  • Explore dose and patient characteristics as determinants of active rATG pharmacokinetic parameters

Originally this study began as a randomized comparison of two methods of stem cell selection utilizing the CliniMACS device. Both arms provided a purified product of CD34+ hematopoietic cells that was depleted of T-lymphocytes. One arm utilized a positive selection methodology using an anti-CD34 antibody and the other arm utilized negative selection with the anti-CD3 antibody OKT-3. There were no toxicities noted that would have required the study to be interrupted early, however, due to low accrual, it was decided to redesign the study. The new design focused on the standard arm utilizing negative selection, and all subsequent participants were treated in that manner. The patients who were treated on the positive selection arm are continuing to be monitored as specified in the original protocol, but will be reported in a descriptive manner only. The primary and secondary objectives of the current version of this study will be answered only by those patients receiving a haploidentical stem cell transplant utilizing a negative selection methodology.

Studietyp

Interventionell

Inskrivning (Faktisk)

57

Fas

  • Fas 3

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

  • Förenta staterna
    • Tennessee
      • Memphis, Tennessee, Förenta staterna, 38105
        • St. Jude Children's Research Hospital

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

2 år till 21 år (Barn, Vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  • Lacking a HLA-identical sibling or unrelated donor matched at 6 HLA loci formally requested within an approximate 90 day period from search initiation and who has a mismatched family member donor available

  • At least 2 and less than or equal to 21 years of age

    • Must have one of the following diagnosis:
    • Acute lymphoid leukemia (ALL) in second, third, or subsequent remission.
    • ALL in first remission but high risk for relapse.
    • Acute myeloid leukemia (AML) in relapse or remission.
    • Secondary AML / MDS
    • Chronic myeloid leukemia (CML)
    • Juvenile myelomonocytic leukemia (JMML).
    • Myelodysplastic syndrome (MDS).
    • Paroxysmal nocturnal hemoglobinuria (PNH)
    • Non-Hodgkin lymphoma in second or subsequent CR
  • Patients with a shortening fraction ≥ 25%
  • Patients with a creatinine clearance ≥ 40cc/min/1.73m^2
  • Patients with FVC ≥ 40% of predicted or pulse oximetry ≥ 92% on room air
  • Patients with direct bilirubin ≤ 3 mg/dL or SGPT ≤ 500 U/L
  • Patients with a Karnofsky or Lansky (age dependent) performance score of ≥ 70
  • Mismatched family member donor is available, HIV negative and ≥ 18 years of age

Exclusion Criteria:

  • Patients who have received a previous hematopoietic stem cell allograft
  • Patients with a known allergy to rabbit or murine products
  • Patients with isolated CNS, testicular or other isolated extramedullary site of relapse

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Icke-randomiserad
  • Interventionsmodell: Enskild gruppuppgift
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Övrig: 1
Procedur: Stamcellstransplantation
En infusion av HLA-felmatchade donatorstamceller från familjemedlemmar som bearbetats genom användning av den undersökningsbara Miltenyi Biotec CliniMACS-enheten.
Enhet: Miltenyi Biotec CliniMACS
A stem cell selection device.
Läkemedel: TBI, systemic chemotherapy and antibodies as follows:
Transplant recipients received a myeloablative conditioning regimen consisting of total body irradiation, thiotepa, cyclophosphamide, ATG, and OKT3. Rituximab was provided prior to transplant for PTLPD prophylaxis. In addition to T cell depletion of the donor product, cyclosporine was administered for GVHD prophylaxis.

Vad mäter studien?

Primära resultatmått

Resultatmått
Tidsram
To describe rate of hematopoietic and immune reconstitution in first 100 days posttransplant for pediatric patients with high-risk hematologic malignancies receiving haploidentical transplant processed with investigational CliniMACS cell sorting device.
Tidsram: September 2005
September 2005

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

St. Jude Children's Research Hospital

Utredare

  • Huvudutredare: Gregory A. Hale, M.D., St. Jude Children's Research Hospital

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Användbara länkar

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 mars 2002

Primärt slutförande (Faktisk)

1 september 2005

Avslutad studie (Faktisk)

1 januari 2009

Studieregistreringsdatum

Först inskickad

9 september 2005

Först inskickad som uppfyllde QC-kriterierna

9 september 2005

Första postat (Uppskatta)

16 september 2005

Uppdateringar av studier

Senaste uppdatering publicerad (Uppskatta)

29 januari 2009

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

28 januari 2009

Senast verifierad

1 januari 2009

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • HAPSCT

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