Mobilization and Collection of Peripheral Blood Stem Cells in Patients With Fanconi Anemia Using G-CSF and AMD3100
NCT ID: NCT00479115
Last Updated: 2020-10-30
Study Results
Results available
Outcome measurements, participant flow, baseline characteristics, and adverse events have been published for this study.
View full resultsBasic Information
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Recruitment Status
COMPLETED
Clinical Phase
PHASE1/PHASE2
Total Enrollment
1 participants
Study Classification
INTERVENTIONAL
Study Start Date
2007-05-31
Study Completion Date
2010-12-31
Brief Summary
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The purpose of this research study is to determine whether an experimental drug called AMD3100 used in combination with another medication called G-CSF is safe and can help to increase the amount of blood stem cells (called CD34+ stem cells) found in the peripheral blood of patients with Fanconi anemia. While AMD3100 has been used successfully in adult volunteers and cancer patients, it has not been used in children or patients with Fanconi anemia and in only a few children with cancer.
Fanconi anemia is a rare genetic disease. Most Fanconi anemia patients eventually develop bone marrow failure, a condition in which the bone marrow no longer produces red blood cells (to carry oxygen), white blood cells (to fight infection), and platelets (to help blood clot). The only successful treatment for patients with Fanconi anemia with bone marrow failure is bone marrow transplantation. However, this treatment has many risks and is not available to all patients with Fanconi anemia.
CD34+ cells include stem cells found in the bone marrow or peripheral blood which are capable of making the red blood cells, white blood cells, and platelets. CD34+ stem cells can be collected from bone marrow or peripheral blood and purified using an experimental device called the CliniMACS. However, most Fanconi anemia patients do not have enough CD34+ stem cells in their bone marrow or peripheral blood to be collected using standard methods that work well in children and adults who don't have Fanconi anemia.
Fanconi anemia is a rare genetic disease. Most Fanconi anemia patients eventually develop bone marrow failure, a condition in which the bone marrow no longer produces red blood cells (to carry oxygen), white blood cells (to fight infection), and platelets (to help blood clot). The only successful treatment for patients with Fanconi anemia with bone marrow failure is bone marrow transplantation. However, this treatment has many risks and is not available to all patients with Fanconi anemia.
CD34+ cells include stem cells found in the bone marrow or peripheral blood which are capable of making the red blood cells, white blood cells, and platelets. CD34+ stem cells can be collected from bone marrow or peripheral blood and purified using an experimental device called the CliniMACS. However, most Fanconi anemia patients do not have enough CD34+ stem cells in their bone marrow or peripheral blood to be collected using standard methods that work well in children and adults who don't have Fanconi anemia.
Detailed Description
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Fanconi anemia is a rare autosomal recessive syndrome comprised of progressive bone marrow failure, congenital anomalies and a predisposition to malignancy. The heterozygote rate in the United States may be as high as 1 in 300. The mean age for the onset of aplastic anemia is approximately eight years. Although improved supportive care has prolonged the survival of these patients from only a few years from the diagnosis of bone marrow failure, the mean age of death is still approximately 24 years of age. Most patients die from complications of bone marrow failure including bleeding, or infection, or from malignancy or complications of stem cell transplantation. In a recent 20 year review of patients in the Fanconi anemia registry, the actual risk of developing leukemia or other cancers was approximately 30%.
The diagnosis of Fanconi anemia initially rested upon finding the combination of bone marrow failure with congenital anomalies. These anomalies include cafe au lait spots and/or hypo pigmentation of the skin, short stature, upper limb malformations (often involving the thumb or radius), renal and gastrointestinal abnormalities, microcephaly, and characteristic facies with a broad nasal base, epicanthal folds, narrow set and small eyes and micrognathia. The bone marrow failure is characterized by slow progression to severe bone marrow aplasia and pancytopenia, stress erythropoiesis with fetal features including macrocytosis, elevated hemoglobin F, and i antigen expression. Attempts to culture bone marrow progenitors in vitro from patients with Fanconi anemia demonstrates decreased numbers of myeloid and erythroid colonies (CFU) consistent with clinical bone marrow failure.
Fanconi anemia cells appear to have a defect in DNA repair that leads to increased spontaneous chromosomal breakage. This feature increases the susceptibility of Fanconi anemia cells to DNA bifunctional cross-linking agents such as mitomycin C and diepoxybutane (DEB). The diagnosis of Fanconi anemia now relies upon detecting increased chromosomal breakage after in vitro treatment with DEB. 11 Similarly, cells cultured from patients with Fanconi anemia display increased susceptibility to the cytotoxicity of mitomycin C. More recently, cells from patients with Fanconi anemia have been demonstrated to display G2 phase prolongation/arrest, increased sensitivity to toxicity by oxygen, defective p53 induction and increased apoptosis.
Fanconi anemia can be classified into at least thirteen complementation groups by somatic cell hybrids. The complementation is based upon correction of the chromosomal sensitivity to cross-linking agents in hybrid cells. Twelve independent genes have been cloned and characterized within these 13 complementation groups. A loss of function in any of these genes including FANC A, B, C, D2, E, F, G, J, L, M, N, and FANC D1 (which is BRCA2) can cause Fanconi anemia. However, complementation groups A, C, and G account for approximately 80-85% of patients with Fanconi anemia in the United States. Discrete mutations in these genes have been identified in families with the disorder. Expression of the complementary cDNA gene in the respective Fanconi anemia cells in vitro corrects the increased chromosomal breakage from DEB and the increased sensitivity to mitomycin C. Expression of gene products in bone marrow progenitors from patients with Fanconi anemia increases survival in in vitro assays.
The current treatment for Fanconi anemia relies upon hematological support in the form of red blood cell and platelet transfusions. Aplastic anemia will transiently respond to androgen therapy in 50% of children. G-CSF has also been utilized in published studies from our own group to improve the number of myeloid cells in the peripheral circulation. Bone marrow transplantation has cured some patients of their bone marrow failure; however, there appears to be more toxicity to the conditioning regimens and there may be increased numbers of solid tumors post transplant compared to patients without the disorder. Survival five years after a matched sibling transplant now exceeds 65% and after an unrelated donor transplant 30%. More recent studies in unrelated donor transplant for Fanconi anemia at Cincinnati Children's Hospital and the University of Minnesota have reported survival rates approaching those observed in matched sibling donor transplants. However, graft failure resulting in death remains a major obstacle. The availability of sufficient numbers of (previously purified and cryopreserved) autologous HSC for re-infusion after graft failure may prevent this complication.
Finally, gene therapy approaches are being pursued, but to date, there is no evidence for cure with this approach in humans, although correction has been reported in murine models. These studies are hampered by the fact that mouse knockouts of FA genes do not develop spontaneous aplastic anemia and thus are not phenocopies of the human disease. Thus in previously reported mouse-studies, gene therapy approaches required ablative total body irradiation of the recipient mice to ensure engraftment of the gene corrected stem cells.
An obvious limitation of Fanconi anemia hematopoietic stem cell gene transfer is that the necessary target for genetic manipulation, the hematopoietic stem cell (or its surrogate, CD34+ cell) is progressively lost during the development of aplastic anemia. Thus at the time of severe aplasia and the greatest need for treatment, target stem cells for genetic modification are deficient. Collection of a meaningful number of HSC prior to the onset of aplastic anemia for eventual use in a therapeutic gene therapy trial will be explored in the study outlined here. Key questions remaining are whether corrected HSC from Fanconi anemia patients will engraft after autologous re-infusion without any cyto-reductive treatment of the recipient and, if engrafted, whether the corrected cells will demonstrate a proliferative advantage over uncorrected stem cells.
The diagnosis of Fanconi anemia initially rested upon finding the combination of bone marrow failure with congenital anomalies. These anomalies include cafe au lait spots and/or hypo pigmentation of the skin, short stature, upper limb malformations (often involving the thumb or radius), renal and gastrointestinal abnormalities, microcephaly, and characteristic facies with a broad nasal base, epicanthal folds, narrow set and small eyes and micrognathia. The bone marrow failure is characterized by slow progression to severe bone marrow aplasia and pancytopenia, stress erythropoiesis with fetal features including macrocytosis, elevated hemoglobin F, and i antigen expression. Attempts to culture bone marrow progenitors in vitro from patients with Fanconi anemia demonstrates decreased numbers of myeloid and erythroid colonies (CFU) consistent with clinical bone marrow failure.
Fanconi anemia cells appear to have a defect in DNA repair that leads to increased spontaneous chromosomal breakage. This feature increases the susceptibility of Fanconi anemia cells to DNA bifunctional cross-linking agents such as mitomycin C and diepoxybutane (DEB). The diagnosis of Fanconi anemia now relies upon detecting increased chromosomal breakage after in vitro treatment with DEB. 11 Similarly, cells cultured from patients with Fanconi anemia display increased susceptibility to the cytotoxicity of mitomycin C. More recently, cells from patients with Fanconi anemia have been demonstrated to display G2 phase prolongation/arrest, increased sensitivity to toxicity by oxygen, defective p53 induction and increased apoptosis.
Fanconi anemia can be classified into at least thirteen complementation groups by somatic cell hybrids. The complementation is based upon correction of the chromosomal sensitivity to cross-linking agents in hybrid cells. Twelve independent genes have been cloned and characterized within these 13 complementation groups. A loss of function in any of these genes including FANC A, B, C, D2, E, F, G, J, L, M, N, and FANC D1 (which is BRCA2) can cause Fanconi anemia. However, complementation groups A, C, and G account for approximately 80-85% of patients with Fanconi anemia in the United States. Discrete mutations in these genes have been identified in families with the disorder. Expression of the complementary cDNA gene in the respective Fanconi anemia cells in vitro corrects the increased chromosomal breakage from DEB and the increased sensitivity to mitomycin C. Expression of gene products in bone marrow progenitors from patients with Fanconi anemia increases survival in in vitro assays.
The current treatment for Fanconi anemia relies upon hematological support in the form of red blood cell and platelet transfusions. Aplastic anemia will transiently respond to androgen therapy in 50% of children. G-CSF has also been utilized in published studies from our own group to improve the number of myeloid cells in the peripheral circulation. Bone marrow transplantation has cured some patients of their bone marrow failure; however, there appears to be more toxicity to the conditioning regimens and there may be increased numbers of solid tumors post transplant compared to patients without the disorder. Survival five years after a matched sibling transplant now exceeds 65% and after an unrelated donor transplant 30%. More recent studies in unrelated donor transplant for Fanconi anemia at Cincinnati Children's Hospital and the University of Minnesota have reported survival rates approaching those observed in matched sibling donor transplants. However, graft failure resulting in death remains a major obstacle. The availability of sufficient numbers of (previously purified and cryopreserved) autologous HSC for re-infusion after graft failure may prevent this complication.
Finally, gene therapy approaches are being pursued, but to date, there is no evidence for cure with this approach in humans, although correction has been reported in murine models. These studies are hampered by the fact that mouse knockouts of FA genes do not develop spontaneous aplastic anemia and thus are not phenocopies of the human disease. Thus in previously reported mouse-studies, gene therapy approaches required ablative total body irradiation of the recipient mice to ensure engraftment of the gene corrected stem cells.
An obvious limitation of Fanconi anemia hematopoietic stem cell gene transfer is that the necessary target for genetic manipulation, the hematopoietic stem cell (or its surrogate, CD34+ cell) is progressively lost during the development of aplastic anemia. Thus at the time of severe aplasia and the greatest need for treatment, target stem cells for genetic modification are deficient. Collection of a meaningful number of HSC prior to the onset of aplastic anemia for eventual use in a therapeutic gene therapy trial will be explored in the study outlined here. Key questions remaining are whether corrected HSC from Fanconi anemia patients will engraft after autologous re-infusion without any cyto-reductive treatment of the recipient and, if engrafted, whether the corrected cells will demonstrate a proliferative advantage over uncorrected stem cells.
Conditions
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Fanconi Anemia
Study Design
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Allocation Method
NA
Intervention Model
SINGLE_GROUP
Primary Study Purpose
SUPPORTIVE_CARE
Blinding Strategy
NONE
Study Groups
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AMD3100
Group Type
EXPERIMENTAL
AMD3100
Intervention Type
DRUG
240 mcg/kg subcutaneously, minimum of two days; maximum of eight days
AmCell CliniMACs
Intervention Type
DEVICE
CD34+ cell selection from peripheral collection
Interventions
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AMD3100
240 mcg/kg subcutaneously, minimum of two days; maximum of eight days
Intervention Type
DRUG
AmCell CliniMACs
CD34+ cell selection from peripheral collection
Intervention Type
DEVICE
Eligibility Criteria
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Inclusion Criteria
1. Patients must have had a diagnosis of Fanconi anemia confirmed by a positive test for increased chromosomal breakage with mitomycin C or diepoxybutane from peripheral blood, bone marrow or amniotic fluid.
2. Bone marrow biopsy/aspirate with cellularity (mononuclear cells per ml of bone marrow obtained), CD34+ content (% of MNC), and normal cytogenetics within three months of collection.
3. For the first two cohorts: Absolute neutrophil count \> 750/mm3, Hemoglobin \> 8 gm/dl without transfusion, platelet count \> 50,000/mm3 without transfusion (within 30 days prior to bone marrow collection or PB stem cell mobilization). For the final cohort, the platelet count will be \>30,000/mm3 without transfusion (within 30 days prior to bone marrow collection or PB stem cell mobilization).
4. Minimum weight: 7.5 kg.
5. Age:
First cohort - \> 7 Second cohort - \> 3 Third cohort - \>1.
6. Ability of patient or parent/legal guardian to consent for bone marrow harvest.
7. Ability of patient or parent/legal guardian to consent for placement of temporary apheresis catheter.
8. Ability of patient or parent/legal guardian to consent for apheresis collection.
9. Ability of patient or parent/legal guardian to consent for PRBC/platelet transfusions.
2. Bone marrow biopsy/aspirate with cellularity (mononuclear cells per ml of bone marrow obtained), CD34+ content (% of MNC), and normal cytogenetics within three months of collection.
3. For the first two cohorts: Absolute neutrophil count \> 750/mm3, Hemoglobin \> 8 gm/dl without transfusion, platelet count \> 50,000/mm3 without transfusion (within 30 days prior to bone marrow collection or PB stem cell mobilization). For the final cohort, the platelet count will be \>30,000/mm3 without transfusion (within 30 days prior to bone marrow collection or PB stem cell mobilization).
4. Minimum weight: 7.5 kg.
5. Age:
First cohort - \> 7 Second cohort - \> 3 Third cohort - \>1.
6. Ability of patient or parent/legal guardian to consent for bone marrow harvest.
7. Ability of patient or parent/legal guardian to consent for placement of temporary apheresis catheter.
8. Ability of patient or parent/legal guardian to consent for apheresis collection.
9. Ability of patient or parent/legal guardian to consent for PRBC/platelet transfusions.
Exclusion Criteria
1. Myeloid or lymphoid leukemia.
2. Clonal cytogenetic abnormality of bone marrow or peripheral blood lymphocytes (in \>2 metaphases by G-banded karyotype or any chromosome deletions of chromosome 7 by Fluorescence in situ hybridization or FISH).
3. Pregnancy or lactation. Women with childbearing potential who are to be collected will be advised that the marrow harvest procedure or the risk of G-CSF used for stem cell mobilization may be teratogenic and will be required to take adequate measures to prevent contraception.
4. Concurrent enrollment in any study using an investigational drug (defined as a drug not approved by the FDA) with the exception of androgens or thyroxine.
5. Physical or emotional status that would prevent compliance, ability to understand treatment plan or adequate follow-up.
6. HIV positive patients.
7. Patients with neoplastic or non-neoplastic disease of any major organ system that would compromise their ability to withstand the bone marrow harvest or apheresis procedure.
8. Patients with uncontrolled (culture or biopsy positive) infection requiring intravenous antivirals, antibiotics, or antifungals. Patients on prolonged antifungal therapy are still eligible if they are culture or biopsy negative in residual radiographic lesions, and they meet the other organ function criteria.
9. Patients unable to tolerate general anesthesia.
10. Known adverse reaction to E. coli products or G-CSF and any contraindication to leukocytosis or hypocalcemia or (where indicated) central line placement.
2. Clonal cytogenetic abnormality of bone marrow or peripheral blood lymphocytes (in \>2 metaphases by G-banded karyotype or any chromosome deletions of chromosome 7 by Fluorescence in situ hybridization or FISH).
3. Pregnancy or lactation. Women with childbearing potential who are to be collected will be advised that the marrow harvest procedure or the risk of G-CSF used for stem cell mobilization may be teratogenic and will be required to take adequate measures to prevent contraception.
4. Concurrent enrollment in any study using an investigational drug (defined as a drug not approved by the FDA) with the exception of androgens or thyroxine.
5. Physical or emotional status that would prevent compliance, ability to understand treatment plan or adequate follow-up.
6. HIV positive patients.
7. Patients with neoplastic or non-neoplastic disease of any major organ system that would compromise their ability to withstand the bone marrow harvest or apheresis procedure.
8. Patients with uncontrolled (culture or biopsy positive) infection requiring intravenous antivirals, antibiotics, or antifungals. Patients on prolonged antifungal therapy are still eligible if they are culture or biopsy negative in residual radiographic lesions, and they meet the other organ function criteria.
9. Patients unable to tolerate general anesthesia.
10. Known adverse reaction to E. coli products or G-CSF and any contraindication to leukocytosis or hypocalcemia or (where indicated) central line placement.
Minimum Eligible Age
1 Year
Maximum Eligible Age
30 Years
Eligible Sex
ALL
Accepts Healthy Volunteers
No
Sponsors
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National Heart, Lung, and Blood Institute (NHLBI)
NIH
Sponsor Role
collaborator
Children's Hospital Medical Center, Cincinnati
OTHER
Sponsor Role
lead
Responsible Party
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Responsibility Role
SPONSOR
Principal Investigators
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Stella Davies, MD
Role: PRINCIPAL_INVESTIGATOR
Children's Hospital Medical Center, Cincinnati
Locations
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Cincinnati Children's Hospital Medical Center
Cincinnati, Ohio, United States
Site Status
Countries
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United States
Other Identifiers
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CCHMCEH004
Identifier Type: -
Identifier Source: org_study_id