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Gene Transfer for X-Linked Severe Combined Immunodeficiency in Newly Diagnosed Infants (LVXSCID-ND)

Primary Purpose

Severe Combined Immunodeficiency Disease, X-linked

Status
Suspended
Phase
Phase 1
Locations
United States
Study Type
Interventional
Intervention
CL20-i4-EF1α-hγc-OPT
Busulfan
CliniMacs
Sponsored by
St. Jude Children's Research Hospital
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Severe Combined Immunodeficiency Disease, X-linked focused on measuring SCID, SCID-X1, X-linked SCID, immunodeficiency, gene therapy

Eligibility Criteria

undefined - 24 Months (Child)MaleDoes not accept healthy volunteers

Inclusion Criteria:

* Treatment Eligibility Criteria:

  • Age <2 years at the time of enrollment.
  • No prior therapy with allogeneic stem cell transplantation.
  • A clinical diagnosis of SCID-X1 documented in the medical record.
  • A proven mutation in the common gamma chain gene as defined by direct sequencing of patient DNA.
  • Age > 2 months to < 1 year of age at the time of busulfan administration.
  • Less than 300 CD3+ T-cells by flow cytometry or higher if evidence of maternal engraftment as supported by peripheral blood FISH analysis for XY and XX.
  • Lymphocyte proliferation to phytohemagglutinin (PHA) <10% of the lower limit of normal for the laboratory.

Treatment Exclusion Criteria:

  • Availability of a HLA matched sibling for allogeneic transplantation
  • Prior therapy with allogeneic stem cell transplantation
  • Positive for HIV infection by genome PCR
  • Presence of a medical condition indicating that survival will be less than 16 weeks such as the requirement for mechanical ventilation, severe failure of a major organ system, or evidence of a serious, progressive infection that is refractory to medical therapy.
  • The presence of any medical contraindications to general anesthesia and bone marrow harvest by aspiration
  • A social situation indicating that the family may not be able to comply with protocol procedures and recommended medical care.

Sites / Locations

  • University of California-San Francisco
  • St. Jude Children's Research Hospital
  • Seattle Children's Research Institute

Arms of the Study

Arm 1

Arm Type

Experimental

Arm Label

Treatment

Arm Description

Participants will undergo a bone marrow harvest in the operating room to obtain bone marrow cells. Cells will be isolated and purified utilizing the CliniMacs device. These cells will undergo vector transduction with the lentiviral vector that contains a normal copy of the γc gene gene (CL20-i4-EF1α-hγc-OPT) and then the transduced cells will be reinfused back into the patient. Participants will receive a conditioning regimen of busulfan 3 days prior and 2 days prior to infusion of vector-corrected cells.intervention: CL20-i4-EF1α-hγc-OPT

Outcomes

Primary Outcome Measures

Number of patients with adequate cell collection and processing
The number of patients who underwent no more than two bone marrow harvests and cryopreservation of at least 1.0 million cells/kg following vector transduction.
Number of patients with adequate neutrophil count recovery after busulfan conditioning
Adequate recovery is defined as absolute neutrophil count (ANC) >500 cells/μl by day +42 unless the patient is neutropenic prior to busulfan administration.
Number of patients without Grade 4 adverse event (AE)
The number of patients experiencing no directly related grade 4 or greater adverse event.
Number of patients with successful reconstitution
Reconstitution with transduced cells defined as detection of vector-marked peripheral blood cells by real time PCR at or above 0.02% VCN in total WBC.
Number of patients with treatment failure
Treatment failure will be defined as lack of adequate cell collection and processing, lack of neutrophil count recovery by day +42, occurrence of grade 4 or greater toxicities by day +42, and/or lack of detection of >0.02% transduced cells in peripheral blood by day +42 post gene transfer.

Secondary Outcome Measures

Full Information

First Posted
January 13, 2012
Last Updated
April 14, 2023
Sponsor
St. Jude Children's Research Hospital
Collaborators
National Heart, Lung, and Blood Institute (NHLBI), Assisi Foundation, California Institute for Regenerative Medicine (CIRM)
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1. Study Identification

Unique Protocol Identification Number
NCT01512888
Brief Title
Gene Transfer for X-Linked Severe Combined Immunodeficiency in Newly Diagnosed Infants
Acronym
LVXSCID-ND
Official Title
A Pilot Feasibility Study of Gene Transfer for X-Linked Severe Combined Immunodeficiency in Newly Diagnosed Infants Using a Self-Inactivating Lentiviral Vector to Transduce Autologous CD34+ Hematopoietic Cells
Study Type
Interventional

2. Study Status

Record Verification Date
April 2023
Overall Recruitment Status
Suspended
Why Stopped
voluntary hold
Study Start Date
August 17, 2016 (Actual)
Primary Completion Date
August 2025 (Anticipated)
Study Completion Date
August 2034 (Anticipated)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
St. Jude Children's Research Hospital
Collaborators
National Heart, Lung, and Blood Institute (NHLBI), Assisi Foundation, California Institute for Regenerative Medicine (CIRM)

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
Yes
Data Monitoring Committee
Yes

5. Study Description

Brief Summary
SCID-X1 is a genetic disorder of blood cells caused by DNA changes in a gene that is required for the normal development of the human immune system. The purpose of this study is to determine if a new method, called lentiviral gene transfer, can be used to treat SCID-X1. This method involves transferring a normal copy of the common gamma chain gene into the participant's bone marrow stem cells. The investigators want to determine if the procedure is safe, whether it can be done according to the methods they have developed, and whether the procedure will provide a normal immune system for the patient. It is hoped that this type of gene transfer may offer a new way to treat children with SCID-X1 that do not have a brother or sister who can be used as a donor for stem cell transplantation.
Detailed Description
Bone marrow CD34+ cells will be obtained in the operating room, transduced with the lentiviral vector that contains a normal copy of the γc gene, and reinfused without any myeloreductive conditioning. Participants will be monitored for hematopoietic recovery from busulfan and for severe adverse events for 42 days post gene therapy. The primary endpoint assessing the efficacy of this approach will be T-cell immune reconstitution 52 weeks (± 4) weeks after transplantation. Continued and detailed evaluation of all aspects of immune reconstitution, protocol-related toxicity, and retroviral integration sites will also be performed. This study will evaluate the first use of a SIN lentiviral vector for the treatment of SCID-X1 and may lead to a new form of therapy that could be applied to the majority of newly diagnosed patients. OBJECTIVES Assess the safety, feasibility and efficacy of lentiviral gene transfer in newly diagnosed SCID-X1 patients transplanted with autologous CD34+ cells that have been transduced with a self-inactivating lentiviral vector (CL20-i4-EF1α-hγc-OPT) expressing a γc gene. Primary Objective 1: Evaluate the safety and feasibility of infusing at least 1 million transduced CD34+ cells per kilogram of body weight in SCID-X1 infants. Primary Objective 2: Evaluate the efficacy of lentiviral gene transfer for inducing significant T-cell reconstitution 52 weeks (± 4 weeks) after transplantation. Significant reconstitution of T cells is defined as at least 2 of the following 3 criteria being present: The development of T-cell proliferative responses to phytohemagglutinin (PHA) that are ≥ 50% the value seen in normal controls ≥ 1000 autologous CD3+ T-cells/μl in the peripheral blood ≥ 500 autologous CD4+ T-cells/μl in the peripheral blood ≥ 200 autologous CD4+ CD45RA T-cells/μl in the peripheral blood OTHER PRE-SPECIFIED OBJECTIVES: Correlate busulfan and its metabolite pharmacokinetics with toxicity, efficacy, engraftment of vector-transduced cells, and event-free survival and overall survival. Evaluate the efficacy of busulfan dose-targeting with busulfan administration every 24 hours for a total of 2 doses in order to achieve a cumulative busulfan area under the curve of 22 mg*hr/L. Evaluate B-cell function during longterm follow-up of protocol patients. Evaluation will include γc expression in circulating B-cells, measurement of serum IgG, IgA, and IgM concentration, measurement of antibody responses to vaccination, evaluation of IgG production after cessation of intravenous gamma globulin therapy in patients with clinical indications to discontinue IVIG. Evaluate NK cell numbers in long term follow-up of protocol patients. Evaluation will include flow cytometry evaluation of NK cell numbers. Determine the vector copy number and the location of vector-integration sites in sorted blood cells. Sorted T-cells, B-cells, NK cells, granulocytes and monocytes will be evaluated for vector copy number. Vector copy number in sorted T-cells will be evaluated as a potential safety measure and will be reported to the FDA if the vector copy number is greater than 5 copies per T cell in any patient at any time. Studies on sorted cells will also include deep sequencing with an automated sequencer to characterize insertion sites, and expression array analysis of T-cell clones to assay for gene expression alterations within 100 kb of the insertion sites. Evaluate the overall, long-term safety of lentiviral gene transfer. This will include complete clinical evaluation of any AEs resulting from the gene transfer procedure. If any oncogenic event is seen, this evaluation will include complete molecular characterization of the tumor clone including insertion site analysis, gene expression analysis, and evaluation for the LMO2, Cdkn2a, Notch1, Cyclin D2 gene alterations.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Severe Combined Immunodeficiency Disease, X-linked
Keywords
SCID, SCID-X1, X-linked SCID, immunodeficiency, gene therapy

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 1, Phase 2
Interventional Study Model
Single Group Assignment
Masking
None (Open Label)
Allocation
N/A
Enrollment
28 (Anticipated)

8. Arms, Groups, and Interventions

Arm Title
Treatment
Arm Type
Experimental
Arm Description
Participants will undergo a bone marrow harvest in the operating room to obtain bone marrow cells. Cells will be isolated and purified utilizing the CliniMacs device. These cells will undergo vector transduction with the lentiviral vector that contains a normal copy of the γc gene gene (CL20-i4-EF1α-hγc-OPT) and then the transduced cells will be reinfused back into the patient. Participants will receive a conditioning regimen of busulfan 3 days prior and 2 days prior to infusion of vector-corrected cells.intervention: CL20-i4-EF1α-hγc-OPT
Intervention Type
Genetic
Intervention Name(s)
CL20-i4-EF1α-hγc-OPT
Other Intervention Name(s)
self inactivating lentiviral vector, IND 14570
Intervention Description
Participants will undergo infusion with autologous CD34+ bone marrow cells transduced with a lentiviral vector that contains a normal copy of the human γc gene.
Intervention Type
Drug
Intervention Name(s)
Busulfan
Other Intervention Name(s)
Busulfex®, Myleran®
Intervention Description
Given intravenously (IV).
Intervention Type
Device
Intervention Name(s)
CliniMacs
Intervention Description
Isolation and purification of CD34+ stem cells will be done after the unmodified frozen backup is obtained and in accordance with our FDA IND and in accordance with the CliniMacs manual of operations.
Primary Outcome Measure Information:
Title
Number of patients with adequate cell collection and processing
Description
The number of patients who underwent no more than two bone marrow harvests and cryopreservation of at least 1.0 million cells/kg following vector transduction.
Time Frame
Day 0
Title
Number of patients with adequate neutrophil count recovery after busulfan conditioning
Description
Adequate recovery is defined as absolute neutrophil count (ANC) >500 cells/μl by day +42 unless the patient is neutropenic prior to busulfan administration.
Time Frame
Day 42 post gene transfer
Title
Number of patients without Grade 4 adverse event (AE)
Description
The number of patients experiencing no directly related grade 4 or greater adverse event.
Time Frame
42 days post gene transfer
Title
Number of patients with successful reconstitution
Description
Reconstitution with transduced cells defined as detection of vector-marked peripheral blood cells by real time PCR at or above 0.02% VCN in total WBC.
Time Frame
42 days post gene transfer
Title
Number of patients with treatment failure
Description
Treatment failure will be defined as lack of adequate cell collection and processing, lack of neutrophil count recovery by day +42, occurrence of grade 4 or greater toxicities by day +42, and/or lack of detection of >0.02% transduced cells in peripheral blood by day +42 post gene transfer.
Time Frame
42 days post gene transfer
Other Pre-specified Outcome Measures:
Title
Pharmacokinetic (PK) variables of busulfan
Description
Blood collections for pharmacokinetic sampling will be performed with dose 1 and used to determine dose modifications for dose 2, if needed. The specific times for blood collects will be institution specific. Summary statistics will be reported.
Time Frame
Days -2 and -1 prior to therapy
Title
Number of patients who achieve the desired therapeutic busulfan AUC
Description
The efficacy of busulfan dose-targeting with busulfan administration every 24 hours for a total of 2 doses in order to achieve a cumulative busulfan AUC of 22 mg*hr/L will be evaluated. The number of patients who achieve the desired therapeutic busulfan AUC will be reported
Time Frame
Day 0
Title
B-cell function evaluated by Immune response
Description
Evaluation may include γc expression in circulating B-cells, measurement of serum IgG, IgA, and IgM concentration, measurement of antibody responses to vaccination, evaluation of IgG production after cessation of intravenous gamma globulin therapy in patients with clinical indications to discontinue IVIG. Summary statistics will be reported.
Time Frame
52 weeks post gene transfer
Title
Number of NK cells
Description
Evaluation will include flow cytometry evaluation of NK cell numbers. Summary statistics will be reported.
Time Frame
52 weeks post gene transfer
Title
Vector copy number by location of vector-integration sites in sorted blood cells
Description
Sorted T-cells, B-cells, NK cells, granulocytes and monocytes will be evaluated for vector copy number. Studies on sorted cells will also include deep sequencing with an automated sequencer to characterize insertion sites, and expression array analysis of T-cell clones to assay for gene expression alterations within 100 kb of the insertion sites. Summary statistics will be reported.
Time Frame
up to 10 years post gene transfer
Title
Event-free survival (EFS)
Description
Event is defined as death, requiring boost post infusion, or an oncogenic event . EFS is defined as time from busulfan infusion to event defined here with all patients surviving at the time of analysis censored.
Time Frame
from baseline up to 10 years post gene transfer
Title
Overall survival (OS)
Description
OS is defined as time from busulfan infusion to death with all patients surviving at the time of analysis censored.
Time Frame
up to 10 years post gene transfer

10. Eligibility

Sex
Male
Gender Based
Yes
Maximum Age & Unit of Time
24 Months
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: * Treatment Eligibility Criteria: Age <2 years at the time of enrollment. No prior therapy with allogeneic stem cell transplantation. A clinical diagnosis of SCID-X1 documented in the medical record. A proven mutation in the common gamma chain gene as defined by direct sequencing of patient DNA. Age > 2 months to < 1 year of age at the time of busulfan administration. Less than 300 CD3+ T-cells by flow cytometry or higher if evidence of maternal engraftment as supported by peripheral blood FISH analysis for XY and XX. Lymphocyte proliferation to phytohemagglutinin (PHA) <10% of the lower limit of normal for the laboratory. Treatment Exclusion Criteria: Availability of a HLA matched sibling for allogeneic transplantation Prior therapy with allogeneic stem cell transplantation Positive for HIV infection by genome PCR Presence of a medical condition indicating that survival will be less than 16 weeks such as the requirement for mechanical ventilation, severe failure of a major organ system, or evidence of a serious, progressive infection that is refractory to medical therapy. The presence of any medical contraindications to general anesthesia and bone marrow harvest by aspiration A social situation indicating that the family may not be able to comply with protocol procedures and recommended medical care.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Stephen Gottschalk, MD
Organizational Affiliation
St. Jude Children's Research Hospital
Official's Role
Principal Investigator
Facility Information:
Facility Name
University of California-San Francisco
City
San Francisco
State/Province
California
ZIP/Postal Code
94158
Country
United States
Facility Name
St. Jude Children's Research Hospital
City
Memphis
State/Province
Tennessee
ZIP/Postal Code
38105
Country
United States
Facility Name
Seattle Children's Research Institute
City
Seattle
State/Province
Washington
ZIP/Postal Code
98101
Country
United States

12. IPD Sharing Statement

Citations:
PubMed Identifier
30995372
Citation
Mamcarz E, Zhou S, Lockey T, Abdelsamed H, Cross SJ, Kang G, Ma Z, Condori J, Dowdy J, Triplett B, Li C, Maron G, Aldave Becerra JC, Church JA, Dokmeci E, Love JT, da Matta Ain AC, van der Watt H, Tang X, Janssen W, Ryu BY, De Ravin SS, Weiss MJ, Youngblood B, Long-Boyle JR, Gottschalk S, Meagher MM, Malech HL, Puck JM, Cowan MJ, Sorrentino BP. Lentiviral Gene Therapy Combined with Low-Dose Busulfan in Infants with SCID-X1. N Engl J Med. 2019 Apr 18;380(16):1525-1534. doi: 10.1056/NEJMoa1815408.
Results Reference
derived
Links:
URL
http://www.stjude.org
Description
St. Jude Children's Research Hospital
URL
http://www.stjude.org/protocols
Description
Clinical Trials Open at St. Jude

Learn more about this trial

Gene Transfer for X-Linked Severe Combined Immunodeficiency in Newly Diagnosed Infants

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