Allogeneic Stem Cell Transplantation, Severe Homzygous 0/+Thalassemia or Sever Variants of Beta 0/+ Thalassemia, THALLO (THALLO)
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|ClinicalTrials.gov Identifier: NCT00578292|
Recruitment Status : Terminated (Stem cell transplant was determined SOC for this disease (study is not relevant))
First Posted : December 21, 2007
Results First Posted : May 1, 2020
Last Update Posted : May 1, 2020
Patients have severe beta-thalassemia or one of the thalassemia variants. Thalassemia is a hereditary disease in which the bone marrow produces abnormal red blood cells that have a shorter life span than normal red blood cells. Because of that, the patient has chronically low red blood cell numbers (anemia) and need regular blood transfusions to help the patient feel better and to help prevent damage to important organs such as the heart. The following treatments are currently available to patients: lifelong blood transfusions and drugs that help remove iron from the body, and long-term antibiotics to prevent infections. These treatments are difficult for patients to take, and do not stop the effects of the disease.
Currently, the only treatment that may cure thalassemia is bone marrow or blood stem cell transplantation. Special blood or bone marrow cells from a healthy person might allow the bone marrow to create healthy cells, which will replace the abnormal red blood cells of thalassemia. There is a lot of experience using special blood or bone marrow cells from a healthy brother or sister who is the same HLA (immune) type. For patients who do not have such a donor in the family, an unrelated volunteer donor can be used. It is important for the patient to realize that this kind of transplant can have more problems than a transplant from a brother or sister.
Because we do not know the long-term effects of this treatment and because this type of transplant has not been used often for people with thalassemia, this is a research study. We hope, but cannot promise, that the transplanted marrow/stem cells will produce healthy cells and the patient will no longer have severe thalassemia.
|Condition or disease||Intervention/treatment||Phase|
|Thalassemia||Drug: Busulfan Drug: Fludarabine Drug: Campath 1H Drug: Cyclophosphamide Drug: MESNA||Not Applicable|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||10 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||Pilot Study of Allogeneic Stem Cell Transplantation From Unrelated Donors for Patients With Severe Homozygous Beta 0/+ Thalassemia or Severe Variants of Beta 0/+ Thalassemia|
|Study Start Date :||February 2004|
|Actual Primary Completion Date :||May 2016|
|Actual Study Completion Date :||May 2016|
Experimental: Bone Marrow or Stem Cell Infusion
Mesna, Cyclophosphamide, Busulfan, Fludarabine, Campath 1H
Bone Marrow or Stem Cell infusion with pre-meds to take place on Day 0.
Bone marrow dose/stem cell dose: To ensure the probability for bone marrow engraftment, 4 x 10e8 nucleated cells/kg patient weight or 5 x 10e6/kg of CD34+ cells/kg patient weight if the product is mobilized peripheral blood, will be the target to be obtained from the unrelated donor.
4.0 mg/kg/day divided into four doses daily for four days; total dose = 16 mg/kg
Days -9 through -6
Other Name: Myleran
30mg/m2 Day -5 through Day -2
Other Name: Fludara
Drug: Campath 1H
Per institutional guidelines Days -5 through -2
Other Name: Alemtuzumab
50 mg/kg Days -5 through -2
Other Name: Cytoxan
10 mg/kg x 5 Days -5 through -2
Other Name: Mesnex
- Engraftment Rate After Transplant [ Time Frame: up to 30 days ]Engraftment is defined as an absolute neutrophil count (ANC) >500/microL x 3 days.
- Number of Participants With Stable Mixed Hematopoietic Chimerism (HC) [ Time Frame: 1 year post-transplant ]Stable hematopoietic chimerism is defined as having 50-99 percent of donor cells.
- Number of Participants With Transient Mixed Hematopoietic Chimerism (HC) [ Time Frame: 1 year post-transplant ]Transient mixed hematopoietic chimerism is defined as any mixed chimerism return to 100 percent donor.
- Number of Participants With Infectious Complications [ Time Frame: up to day 100 ]All AEs and SAEs (including infections) will be collected for evaluation of infectious complications.
- Hematopoietic Reconstitution [ Time Frame: 1 year post-transplant ]Hematopoietic: defined as transfusion independence.
- Immune Reconstitution [ Time Frame: 1 year post-transplant ]Immune reconstitution: defined as absolute lymphocyte count (ALC) >1000x10e3/microL
- Number of Participants With ACUTE GVHD [ Time Frame: Assessed weekly from Day 0 to day 100 ]Acute GVHD is graded by the method of Przepiorka D. et al, which evaluates skin involvement, lower and upper GI, and liver function (bilirubin), each being graded in stages from 0 to 4, where 0 means no acute GVHD, and 4 is the highest stage of acute GVHD
- Number of Participants With CHRONIC GVHD [ Time Frame: Assessed monthly from month 3 to month 12 ]Chronic GVHD is graded by NIH guidelines for chronic GVHD, which evaluates skin, joints, oral, ocular, hepatic, esophagus, GI, respiratory, platelet, and musculoskeletal involvement, in stages from 0 to 3 where 0 means no chronic GVHD, and 3 is the highest stage of chronic GVHD.
- Event-free Survival [ Time Frame: up to 2 years post transplant ]Event-free survival is calculated from the date of transplant to the date of graft failure, disease recurrence or death from any cause.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00578292
|United States, Texas|
|Texas Children's Hospital|
|Houston, Texas, United States, 77030|
|Principal Investigator:||Tami John, MD||Baylor College of Medicine/Texas Children's Hospital|
|Study Director:||Tami John, MD||Baylor College of Medicine/Texas Children's Hospital|