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Phase I/II Gene Transfer Clinical Trial of scAAV9.U1a.hSGSH

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT02716246
Recruitment Status : Recruiting
First Posted : March 23, 2016
Last Update Posted : June 26, 2020
Sponsor:
Information provided by (Responsible Party):
Abeona Therapeutics, Inc

Tracking Information
First Submitted Date  ICMJE March 17, 2016
First Posted Date  ICMJE March 23, 2016
Last Update Posted Date June 26, 2020
Actual Study Start Date  ICMJE March 2016
Estimated Primary Completion Date December 2022   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures  ICMJE
 (submitted: February 12, 2019)
  • Product safety [ Time Frame: 24 months ]
    Determination of safety based on the development of unacceptable toxicity: defined as the occurrence of two or more unanticipated Grade III or higher treatment-related adverse events.
  • Change from baseline in age equivalent developmental score [ Time Frame: 24 months ]
    Change from baseline in the Age Equivalent Developmental Score calculated by the Mullen Scales of Early Learning or the Kaufman Assessment Battery for Children, based on developmental age, compared with natural history study data at 6, 12, 18, and 24 months
Original Primary Outcome Measures  ICMJE
 (submitted: March 17, 2016)
Development of unacceptable toxicity: [ Time Frame: 24 months ]
Determination of safety based on the development of unacceptable toxicity: defined as the occurrence of two or more unanticipated Grade III or higher treatment-related toxicity.
Change History
Current Secondary Outcome Measures  ICMJE
 (submitted: September 3, 2019)
  • Change from baseline of CSF heparan sulfate after treatment [ Time Frame: 24 months ]
    Change from baseline of CSF heparan sulfate after treatment at 1, 6, 12, and 24 months
  • Change from baseline of plasma or urine glycosaminoglycans or heparan sulfate after treatment [ Time Frame: 24 months ]
    Change from baseline of plasma or urine glycosaminoglycans or heparan sulfate after treatment at Month 1, 6, 12, 18, 24
  • Change from baseline in CSF or plasma or leukocyte SGSH enzyme activity levels after treatment [ Time Frame: 24 months ]
    Change from baseline in CSF or plasma or leukocyte SGSH enzyme activity levels after treatment at Month 1, 6, 12, 24
  • Change from baseline in liver and/or spleen volumes after treatment [ Time Frame: 24 months ]
    Change from baseline in liver and/or spleen volumes after treatment as measured by MRI at Month 1, 6, 12, 24
  • Change from baseline in brain volume after treatment [ Time Frame: 24 months ]
    Change from baseline in brain volume after treatment as measured by MRI at Month 1, 6, 12, 24
  • Change from baseline in Cognitive Age Equivalent (Developmental Age) [ Time Frame: 24 months ]
    Change from baseline in Cognitive Age Equivalent (Developmental Age) compared to natural history study calculated using the Bayley Scales of Infant and Toddler Development or the Kaufman Assessment Battery for Children at Month 6, 12, 18, 24
  • Change from baseline in Adaptive Age Equivalent score [ Time Frame: 24 months ]
    Change from baseline in Adaptive Age Equivalent score after treatment compared to natural history study data, as assessed by parent report using the Vineland Adaptive Behavior Scale II Survey form at Month 6, 12, 18, 24
  • Change from baseline Developmental Quotient [ Time Frame: 24 months ]
    Change from baseline Developmental Quotient after treatment compared to natural history study data assessed by Mullen Scales of Early Learning or the Kaufman Assessment Battery for Children, based on chronological and developmental age, at Month 6, 12, 18, 24
  • Change from baseline in the Sanfilippo Behavior Rating Scale [ Time Frame: 24 months ]
    Change from baseline in the Sanfilippo Behavior Rating Scale at Month 6, 12, 18, 24
  • Change from baseline in the Leiter International Performance Scale - Revised [ Time Frame: 24 months ]
    Change from baseline in the Leiter-R at Month 6, 12, 18, 24
  • Change from baseline in Pediatric Quality of Life Inventory (PedsQL) total score [ Time Frame: 24 months ]
    Change from baseline in Pediatric Quality of Life Inventory (PedsQL) total score at Month 6, 12, 18, 24
  • Change from baseline in parent quality of life, using the Parenting Stress Index, 4th ed. [ Time Frame: 24 months ]
    Change from baseline in parent quality of life, using the Parenting Stress Index, 4th ed short form (PSI-4) at Month 12, 24
  • Determination of vector shedding analysis [ Time Frame: 24 months ]
    Determination of vector shedding in plasma, saliva, urine, and feces to provide preliminary data for the Environmental Risk Assessment
Original Secondary Outcome Measures  ICMJE
 (submitted: March 17, 2016)
  • Increase in CSF and blood leukocyte SGSH enzyme activity levels at 6 and/or 12 months [ Time Frame: 12 months ]
  • Reduced liver and spleen volumes at 6 and/or 12 months after treatment, as measured by magnetic resonance imaging (MRI) [ Time Frame: 12 months ]
  • Improved adaptive functioning, or arrest of decline in adaptive functioning at 6 and/or 12 months, as assessed by parent report using the Vineland Adaptive Behavior Scale [ Time Frame: 12 months ]
  • Improved cognitive ability or arrest of cognitive deterioration at 6 and/or 12 months after treatment, as measured by direct testing of the child using the Leiter International Performance Scale and the Mullen Scales of Early Learning [ Time Frame: 12 months ]
  • Reduction of urine glycosaminoglycans or heparan sulfate at 6 and/or 12 months after treatment [ Time Frame: 12 months ]
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
 
Descriptive Information
Brief Title  ICMJE Phase I/II Gene Transfer Clinical Trial of scAAV9.U1a.hSGSH
Official Title  ICMJE Phase I/II Gene Transfer Clinical Trial of scAAV9.U1a.hSGSH for Mucopolysaccharidosis (MPS) IIIA
Brief Summary Open-label, dose-escalation clinical trial of scAAV9.U1a.hSGSH injected intravenously through a peripheral limb vein
Detailed Description Self-complementary adeno-associated virus serotype 9 carrying the human SGSH gene under the control of a U1a promoter (scAAV9.U1a.hSGSH) will be delivered one time through a venous catheter inserted into a peripheral limb vein. A tapering course of prophylactic enteral prednisone or prednisolone will be administered for a period of at least two months.
Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 1
Phase 2
Study Design  ICMJE Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Condition  ICMJE
  • MPS IIIA
  • Sanfilippo Syndrome
  • Sanfilippo A
  • Mucopolysaccharidosis III
Intervention  ICMJE Biological: ABO-102
Self-complementary adeno-associated virus serotype 9 carrying the human SGSH gene under the control of a U1a promoter (scAAV9.U1a.hSGSH) will be delivered one time through a venous catheter inserted into a peripheral limb vein.
Other Name: scAAV9.U1a.hSGSH
Study Arms  ICMJE
  • Experimental: Cohort 1 Low Dose
    Dose of 0.5 X 10^13 vg/kg
    Intervention: Biological: ABO-102
  • Experimental: Cohort 2 Mid Dose
    Dose of 1 X 10^13 vg/kg
    Intervention: Biological: ABO-102
  • Experimental: Cohort 3 High Dose
    Dose of 3 X 10^13 vg/kg
    Intervention: Biological: ABO-102
Publications *

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruitment Information
Recruitment Status  ICMJE Recruiting
Estimated Enrollment  ICMJE
 (submitted: February 12, 2019)
22
Original Estimated Enrollment  ICMJE
 (submitted: March 17, 2016)
9
Estimated Study Completion Date  ICMJE December 2022
Estimated Primary Completion Date December 2022   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE

Inclusion Criteria:

  • Diagnosis of MPS IIIA confirmed by the following methods:
  • No detectable or significantly reduced SGSH enzyme activity by leukocyte assay, and
  • Genomic DNA analysis demonstrating homozygous or compound heterozygous mutations in the SGSH gene
  • Age 6 months to 2 years or children older than 2 years with a minimum cognitive Developmental Quotient (DO) of 60 or above (calculated by Bayley Scales of lnfant and Toddler Development - Third Edition)

Exclusion Criteria:

  • Inability to participate in the clinical evaluation as determined by PI
  • Identification of two nonsense or null variants on genetic testing of the SGSH gene
  • At least one S298P mutation in the SGSH gene
  • Has evidence of an attenuated phenotype of MPS IIIA
  • Presence of a concomitant medical condition that precludes lumbar puncture or use of anesthetics
  • Active viral infection based on clinical observations
  • Concomitant illness or requirement for chronic drug treatment that in the opinion of the PI creates unnecessary risks for gene transfer or precludes the child from participating in the protocol assessments and follow up
  • Subjects with total anti-AAV9 antibody titers ≥ 1:100 as determined by ELISA binding immunoassay
  • Subjects with a positive response for the ELISPOT for T-cell responses to AAV9
  • Serology consistent with exposure to HIV, or serology consistent with active hepatitis B or C infection
  • Bleeding disorder or any other medical condition or circumstance in which a lumbar puncture (for collection of CSF) is contraindicated according to local institutional policy
  • Visual or hearing impairment sufficient to preclude cooperation with neurodevelopmental testing
  • Uncontrolled seizure disorder
  • Any item (braces, etc.) which would exclude the subject from being able to undergo MRI according to local institutional policy
  • Any other situation that precludes the subject from undergoing procedures required in this study
  • Subjects with cardiomyopathy or significant congenital heart abnormalities
  • The presence of significant non-MPS IlIA related CNS impairment or behavioral disturbances that would confound the scientific rigor or interpretation of results of the study
  • Abnormal laboratory values Grade 2 or higher as defined in CTCAE v4.03 for GGT, total bilirubin, creatinine, hemoglobin, WBC count, platelet count, PT and aPTT
  • Female participant who is pregnant or demonstrates a positive urine or bhCG result at screening assessment (if applicable)
  • Any vaccination with viral attenuated vaccines less than 30 days prior to the scheduled date of treatment (and use of prednisolone)
  • Previous treatment by Haematopoietic Stem Cell transplantation
  • Previous participation in a gene/cell therapy or ERT clinical trial
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 6 Months and older   (Child, Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE
Contact: Medical Affairs +1 646-813-4701 sanfilippo@abeonatherapeutics.com
Listed Location Countries  ICMJE Australia,   Spain,   United States
Removed Location Countries France,   Germany
 
Administrative Information
NCT Number  ICMJE NCT02716246
Other Study ID Numbers  ICMJE ABT001
Has Data Monitoring Committee Yes
U.S. FDA-regulated Product
Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
IPD Sharing Statement  ICMJE
Plan to Share IPD: No
Plan Description: There is no plan to share data
Responsible Party Abeona Therapeutics, Inc
Study Sponsor  ICMJE Abeona Therapeutics, Inc
Collaborators  ICMJE Not Provided
Investigators  ICMJE Not Provided
PRS Account Abeona Therapeutics, Inc
Verification Date June 2020

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP