Hematopoietic Stem Cell Transplantation
Conditions
Keywords
Hematopoietic stem cells, Umbilical cord blood transplantation, Intrabone infusion, Platelet recovery, Neutrophil recovery, Pediatric patients
Brief summary
The purpose of this study is to determine if the method of intrabone infusion of hematologic stem cells can increase and accelerate hematopoietic reconstitution after umbilical cord blood transplantation in pediatric patients.
Detailed description
Umbilical cord blood transplantation (UCBT) has been increasingly used to treat malignant and non-malignant haematological, immunodeficiency and some metabolic diseases. UCBT offers the advantages of easy procurement, no risk to donors, a reduced risk of transmitting infections, immediate availability of cryopreserved units, and acceptable partial HLA mismatches. However, patients treated with UCBT show delayed hematopoietic and immunological recoveries, have higher rates of infection, and relapse from the original malignant disease, which can all lead to life threatening problems. UCBT can also result in a higher rate of graft failure compared to other hematopoietic stem cell transplantation (HSCT) sources. The problem of a slower hematopoietic recovery post-UCBT has been addressed using a number of different approaches in adult patients.In adults, use of intrabone injection of cord blood results in a faster hematopoietic recovery in a phase II study. However, there is no clinical trial in pediatric patients. This study is addressed to determine if a change in the cord blood stem cell infusion method can increase and accelerate hematopoietic reconstitution after UCBT in pediatric patients.
Interventions
PROCEDUREIntrabone infusion of umbilical cord blood stem cells
Sponsors
Marion Cortier, PhD
Michel Duval, MD
Pierre Teira, MD
Sonia Cellot, MD, PhD
Isabelle Louis, PhD
Elie Haddad, MD, PhD
Marie-France Vachon, MScN
Henrique Bittencourt, MD, PhD
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
1 Years to 21 Years
Healthy volunteers
No
Inclusion criteria
* One to 21 years of age; * More than 10 kg in weight; * Diagnosis of hematopoietic disorders (malignant or not) with an indication for hematopoietic stem cell transplantation; * Absence of an HLA-identical related donor; * Availability of a single cord blood (CB) with at least 3 x 10\^7 nucleated cells (NCs)/kg (if HLA identical or 1 HLA-mismatch) or at least 4 x 10\^7 NCs/kg (if a 2 HLA-mismatch) at freezing. Use of two CB units (double cord transplant) will be allowed provided that: 1) a single CB unit fulfilling the above criteria is not available; 2) a maximum of 2 HLA mismatch is present for each CB unit; and 3) a minimum of 4 x 10\^7 NCs/kg (as the sum for both CB units) is present at freezing. * A myeloablative-conditioning regimen; * A Lansky (for patients less than 16 years of age) or Karnofsky (for patients more than 16 years of age) score equal to or higher than 70%. * Adequate organ function as follows: * Cardiac (ejection fraction \> 50%); * Renal (serum creatinine within the normal range for age, and creatinine clearance or a GFR \> 70 ml/min/1.73m2); * Hepatic (AST or ALT \< 5 x upper limit of normal for age); * Pulmonary (FEV1, FVC, and DLCO ≥ 50% by pulmonary function tests or, in children unable to cooperate, no sign of dyspnea at rest, no exercise intolerance, no supplementary oxygen therapy, and a normal pulmonary radiography or pulmonary scan); * No sign of uncontrolled systemic bacterial, fungal or viral infection; * Written informed consent by the patient or his/her legal guardian
Exclusion criteria
* Non-myeloablative conditioning; * Pregnancy or breastfeeding; * HIV positive serology; * Bone disease (e.g. osteopetrosis, osteogenesis imperfecta) * Previous autologous or allogeneic hematopoietic stem cell transplantation performed up to one year before enrolment, except in the case of non-engraftment or early rejection of a previous allogeneic stem cell transplantation. * Active skin infection at the site of intrabone injection. * History of intolerance/allergy to sedation medications or local anesthetics. * Contraindication to sedation
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Platelet recovery rate | at 100 days post- transplantation | First of seven days of untransfused platelet count higher than 20 x 10\^9/L |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Immunological reconstitution | at 30, 60, 100, 180, and 360 days post- transplantation | Total number of T cells (and subpopulations), B and NK (natural killer) cells in peripheral blood at different time-points |
| Donor chimerism rate | at 30, 60,100, and 180 days post-transplantation | Percentage of donor(s) cells in peripheral blood at different time-points |
| Acute GVHD (grade 2-4) rate | at 180 days | Incidence of grade II-IV acute GVHD (Graft versus Host Disease) |
| Neutrophil recovery rate | at 60 days post- transplantation | First of three days of absolute neutrophil count equal or higher than 0.5 x 10\^9/L |
| Event-free and overall survival | at 2 years | Event-free survival is defined as the time interval between transplantation and relapse, graft rejection, death or last follow-up, whichever occurs first; Overall survival is defined as the time between transplantation and death or last follow-up |
| Adverse infections (grade and frequency) | at one month post-transplantation | Toxicity will be assessed using the Common Terminology Criteria for Adverse Events v4.0 |
| chronic GVHD | at 2 years post-transplantation | Incidence of chronic GVHD (Graft versus Host Disease) will be scored according to NIH consensus on chronic GVHD |
| Infection rate (bacterial, viral, fungal and parasitic) | at 180 days post-transplantation | Clinical and microbiological documented infections will be reported according to anatomic site, date of onset and microorganism |
Countries
Canada
Outcome results
None listed