Trial record 5 of 47 for:    "ZAP70-related severe combined immunodeficiency" OR "Severe Combined Immunodeficiency"

Stem Cell Gene Therapy to Treat X-Linked Severe Combined Immunodeficiency (XSCID)

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00028236
First received: December 17, 2001
Last updated: July 26, 2011
Last verified: July 2011
  Purpose

This is a clinical trial of gene therapy for X-linked severe combined immunodeficiency (XSCID), a genetic disease caused by defects in a protein called the common gamma chain, which is normally on the surface of immune cells called lymphocytes. XSCID patients cannot make T lymphocytes, and their B lymphocytes fail to make essential antibodies for fighting infections. Without T and B lymphocytes patients develop fatal infections in infancy unless they are rescued by a bone marrow transplant from a healthy donor. However, even transplanted patients may achieve only partial immune recovery and still suffer from many infections, auto-immunity and/or and poor growth. A recent, successful trial in France used gene therapy instead of bone marrow transplantation for infants with XSCID. This experience indicates that gene therapy can provide clinical benefit to XSCID patients. We will enroll eight older XSCID patients (1.5-20 years-old), who have previously received at least one bone marrow transplant, but still have poor T and B lymphocyte function that compromises their quality of life. Before enrollment, these subjects will have had some of their own blood-forming stem cells harvested and frozen in a blood bank. These cells have a defective gene, but a correct copy of the gene will be inserted while the cells are grown in sterile conditions outside the patient's body. To do this, the cells will be unfrozen and exposed for four days in a row to growth factors and particles of a retrovirus we have constructed and tested called "GALV MFGS-gc." Retrovirus particles will attach to the patient cells and introduce a correct copy of the common gamma chain gene into cells capable of growing into all types of blood cells, including T and B lymphocytes. XSCID patients who are enrolled in the study will receive a single dose of their own cells that have been modified by the GALV MFGS-gc treatment and also will be given another drug called palifermin to help prevent side effects from the chemotherapy and possibly try to improve the development of the T cells. After this, the patients will be monitored to find out if the treatment is safe and to see if their immune function improves. Study endpoints are (1) efficient and safe clinical-scale transduction of HSC from post-BMT XSCID subjects; (2) administration of a nonmyeloablative conditioning regimen in older patients to improve engraftment; (3) administration of a transduced HSC to eight subjects; (4) administration of KGF to improve thymic function post transplant to improve T cell development; and (5) appropriate follow-up of the treated subjects to monitor vector sequence distribution, gc expression in hematopoietic lineages, and lymphoctye numbers and function as well as general health and immune status.


Condition Intervention Phase
Severe Combined Immunodeficiency
Drug: Gene-Transduced Autologous CD34+ Stem Cells
Phase 1

Study Type: Interventional
Study Design: Primary Purpose: Treatment
Official Title: Ex Vivo Retroviral Gene Transfer For Treatment of X-Linked Severe Combined Immunodeficiency (XSCID)

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Enrollment: 3
Study Start Date: December 2001
Study Completion Date: July 2011
Primary Completion Date: July 2011 (Final data collection date for primary outcome measure)
Intervention Details:
    Drug: Gene-Transduced Autologous CD34+ Stem Cells
    N/A
Detailed Description:

This is a Phase I/II clinical trial of ex vivo hematopoietic stem cell (HSC) gene therapy for X-linked severe combined immunodeficiency (XSCID). XSCID results from defects in the IL2RG gene encoding the common gamma chain (gc) shared by receptors for Interleukin 2 (IL-2), IL-4, IL-7, IL-9, IL-15 and IL-21. XSCID patients generally lack T-lymphocytes and NK cells, and their B-lymphocytes fail to make essential antibodies. XSCID is fatal in infancy without immune reconstitution, such as by allogeneic bone marrow transplantation (BMT). However, many transplanted patients achieve only partial immune reconstitution, and consequently have recurrent infections, autoimmunity and/or poor growth. Recent successful retroviral gene therapy instead of BMT for infants with XSCID indicates that ex vivo gene therapy can provide clinical benefit to XSCID patients.

We will enroll eight older XSCID patients (1.5-20 years-old; greater than or equal to 12 kg body weight), who have had attempted BMT, but who have persistent T-lymphocyte and B-lymphocyte impairments that compromise their quality of life. Prior to enrollment, these subjects will have had autologous CD34+ HSC mobilized by treatment with granulocyte colony stimulating factor (G-CSF), collected from peripheral blood by apheresis, immune selected and cryopreserved in sufficient numbers to achieve entry criteria (greater than or equal to 1.0 x 10(6) CD34+ HSC/kg body weight). HSC procurement will be conducted under a separate, approved and active NIH protocol, 94-I-0073, 'Recruitment of peripheral blood hematopoietic progenitors by granulocyte colony stimulating factor [G-CSF]'.

Autologous CD34+ HSC will be transduced ex vivo with the gibbon ape leukemia virus (GALV) envelope-pseudotyped, replication-defective, murine onco-retrovirus vector, MFGS-gc that encodes the common gamma chain. Transductions will occur in flexible gas-permeable plastic containers using serum-free medium supplemented with 1% human serum albumin and five recombinant growth factors (50 ng/mL Flt3-L, 50 ng/mL SCF, 50 ng/mL TPO, 25 ng/mL IL-6, and 5 ng/mL IL-3). Subjects who are older than the age of 3 will be given a conditioning regimen consisting of Fludarabine and Busulfan then they will receive a single infusion of transduced HSC. Prior to the chemotherapy, and following the infusion of the cells, the same patients will also be given Keratinocyte growth factor (KGF), also known as palifermin. Subjects will be monitored for safety and efficacy; the latter evidenced by new development of autologous transduced lymphocytes with functional gc. Study endpoints are (1) efficient and safe clinical-scale transduction of HSC from post-BMT XSCID subjects; (2) administration of a nonmyeloablative conditioning regimen to improve engraftment; (3) administration of transduced HSC to eight subjects; (4) administration of KGF to improve thymic function post transplant to improve T cell development; and (5) appropriate follow up of treated subjects to monitor vector sequence distribution, gc expression in hematopoietic lineages, and lymphocyte numbers and function; as well as general health and immune status.

  Eligibility

Ages Eligible for Study:   18 Months to 20 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

Patients must have XSCID as defined by either a deleterious mutation in IL2RG, the absence of or less than 5% of normal detectable gc protein, or evidence of functionally defective gc protein.

Patients must be between 1.5 and 20 years of age.

Patients must weigh at least 12 kg.

Patients will have evidence of combined B-cell and T-cell immune deficiency over at least a 6 month period despite previous allogeneic BMT at least 12 months prior to study entry. T-cell immune deficiency is defined as one or more of the following: Total T-cell count less than 500/ul; less than 50% of normal value for in vitro mitogen stimulation; or absent proliferation in vitro to antigens. B-cell immune deficiency is defined as one or more of the following: IgM, IgA or IgE values which are 2 or more standard deviations below the established value for normal, IgG values falling to less than 30% of normal during unintended interruptions or delay in the periodic administration of IVIG; or documented failure to respond to a specific antigen challenge.

Patients must have less than or equal to 3% of their mobilized CD34+ cells deriving from their allogeneic bone marrow donor.

Willingness to remain hospitalized for several days to several weeks.

Have a primary care physician at home.

Consent to permit blood and/or tissue samples for storage.

EXCLUSION CRITERIA:

Any current or preexisting hematologic malignancy.

Current treatment with any chemotherapeutic agent.

Current treatment with any immunosuppressive agent, excluding corticosteroids.

Documented HIV-1 infection.

Documented Hepatitis B infection.

Childhood malignancy (occurring before 18 years of age) in the patient or a first degree relative, or known genotype of the subject conferring a predisposition to cancer.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00028236

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
  More Information

Publications:
Responsible Party: Harry L. Malech, M.D./National Institute of Allergy and Infectious Diseases, National Institutes of Health
ClinicalTrials.gov Identifier: NCT00028236     History of Changes
Other Study ID Numbers: 020057, 02-I-0057
Study First Received: December 17, 2001
Last Updated: July 26, 2011
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Peripheral Blood Stem Cells
Common Gamma Chain (GC)
Immune Reconstitution
T Lymphocytes
B Lymphocytes
X-Linked Severe Combined Immune Deficiency (XSCID)
Gene Therapy
NK Cell
Bone Marrow Transplantation
Engraftment
XSCID
Immune Deficiency
Immune System

Additional relevant MeSH terms:
Immunologic Deficiency Syndromes
Severe Combined Immunodeficiency
X-Linked Combined Immunodeficiency Diseases
Immune System Diseases
Infant, Newborn, Diseases
DNA Repair-Deficiency Disorders
Metabolic Diseases
Genetic Diseases, X-Linked
Genetic Diseases, Inborn

ClinicalTrials.gov processed this record on July 26, 2014