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Long-term Follow-up Study of Patients Receiving Onasemnogene Abeparvovec-xioi

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ClinicalTrials.gov Identifier: NCT04042025
Recruitment Status : Not yet recruiting
First Posted : August 1, 2019
Last Update Posted : September 24, 2019
Sponsor:
Information provided by (Responsible Party):
AveXis, Inc.

Brief Summary:
This is a long-term follow-up safety and efficacy study of participants in clinical trials for spinal muscular atrophy (SMA) Type 1, Type 2 or Type 3 who were treated with onasemnogene abeparvovec-xioi. Participants will roll over from their respective previous (parent) study into this long-term study for continuous monitoring of safety as well as monitoring of continued efficacy (developmental milestones) and durability of response to onasemnogene abeparvovec-xioi treatment.

Condition or disease Intervention/treatment Phase
Spinal Muscular Atrophy Type I Spinal Muscular Atrophy Type II Spinal Muscular Atrophy Type III Biological: Onasemnogene Abeparvovec-xioi Phase 4

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 308 participants
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Prevention
Official Title: A Long-term Follow-up Study of Patients in the Clinical Trials for Spinal Muscular Atrophy Receiving AVXS-101
Estimated Study Start Date : October 1, 2019
Estimated Primary Completion Date : December 31, 2034
Estimated Study Completion Date : December 31, 2034


Arm Intervention/treatment
Cohort 1: Intravenous (IV) Onasemnogene Abeparvovec-xioi
Participants received treatment with IV onasemnogene abeparvovec-xioi in an onasemnogene abeparvovec-xioi parent study.
Biological: Onasemnogene Abeparvovec-xioi
Onasemnogene abeparvovec-xioi is a non-replicating recombinant adeno-associated virus serotype 9 containing the human survival motor neuron gene under the control of the cytomegalovirus enhancer/chicken β-actin-hybrid promoter. Onasemnogene abeparvovec-xioi administered as a one-time intravenous (IV) infusion or intrathecal (IT) injection. Dosage determined by participant weight.

Cohort 2: Intrathecal (IT) Onasemnogene Abeparvovec-xioi
Participants received treatment with IT onasemnogene abeparvovec-xioi in an onasemnogene abeparvovec-xioi parent study.
Biological: Onasemnogene Abeparvovec-xioi
Onasemnogene abeparvovec-xioi is a non-replicating recombinant adeno-associated virus serotype 9 containing the human survival motor neuron gene under the control of the cytomegalovirus enhancer/chicken β-actin-hybrid promoter. Onasemnogene abeparvovec-xioi administered as a one-time intravenous (IV) infusion or intrathecal (IT) injection. Dosage determined by participant weight.




Primary Outcome Measures :
  1. Number of participants who reach developmental milestones [ Time Frame: Up to 5 years ]
    Assessed via the developmental milestone checklist, formed of 10 yes/no questions. The developmental milestones are: head control, sitting with support, sitting without support, sitting without support for 30 seconds, hands-and-knees crawling, pulls to stand, standing with assistance, walking with assistance, standing alone and walking alone.

  2. Change from baseline in Hammersmith Functional Motor Scale - Expanded (HFMSE) score [ Time Frame: Up to 2 years ]
    The HFMSE was devised for use in children with SMA Type 2 and Type 3, to give objective information on motor ability and clinical progression. The HFMSE is formed of 33 assessments rated from 0 (unable to perform functional task) to 2 (able to perform functional task unassisted). Higher scores indicated higher levels of motor ability.

  3. Number of participants who experience a clinically significant change from baseline in pulmonary assessment results [ Time Frame: Up to 15 years ]
    Participants will receive pulmonary assessments by a pulmonologist or appropriate clinician. Respiratory device data will be reviewed for participants receiving non-invasive ventilatory support.

  4. Number of participants who experience swallowing dysfunction [ Time Frame: Up to 5 years ]
    Assessed via the swallowing function questionnaire, formed of 4 yes/ no questions and 1 body weight question.

  5. Number of participants who experience a clinically significant change from baseline in physical examination findings [ Time Frame: Up to 5 years ]
    The physical examination includes review of the following systems: head, ears, eyes, nose and throat, lungs/thorax, cardiovascular, abdomen, musculoskeletal, neurologic, dermatologic, lymphatic, and genitourinary. In addition, visual inspection of the spine, back, shoulders, and hips looking for spinal curvature and asymmetry will be carried out. Joints will be assessed for loss of mobility and contractures.

  6. Number of participants who experience a clinically significant change from baseline in vital signs measurements [ Time Frame: Up to 5 years ]
    Vital sign measurements will include blood pressure, respiratory rate, pulse, axillary temperature, and pulse oximetry.

  7. Change from baseline in height measurements [ Time Frame: Up to 5 years ]
  8. Change from baseline in weight measurements [ Time Frame: Up to 5 years ]
  9. Number of participants who experience a clinically significant change from baseline in clinical laboratory assessments [ Time Frame: Up to 5 years ]
    Blood samples will be collected for hematology (including complete blood cell count) and chemistry.

  10. Number of participants who experience a clinically significant change from baseline in cardiac assessments [ Time Frame: Up to 5 years ]
    Cardiac assessments will include a 12-lead electrocardiogram, transthoracic echocardiogram and 24-hour Holter monitor.

  11. Number of participants who experience a clinically significant change from baseline in observational phase questionnaire results [ Time Frame: Year 6 to Year 15 ]
    The observational phase questionnaire includes 7 yes/no questions. Observation categories include: adverse events, hospitalizations, concomitant medications, ventilatory support and feeding support.

  12. Number of participants who experience at least one serious adverse event (SAE) [ Time Frame: Up to 15 years ]

    An adverse event (AE) is defined as the development of an undesirable medical condition or the deterioration of a pre-existing medical condition following or during exposure to a pharmaceutical product, whether or not considered casually related to the product. An SAE is defined as an AE occurring during any study phase that fulfills one or more of the following criteria:

    • Results in death
    • Is immediately life-threatening
    • Requires in-patient hospitalization or prolongation of existing hospitalization
    • Results in persistent or significant disability or incapacity
    • Results in a congenital abnormality or birth defect
    • Is an important medical event that may jeopardize the patient/subject or may require medical intervention to prevent one of the outcomes listed above.

  13. Number of participants who experience at least one adverse event of special interest (AESI) [ Time Frame: Up to 15 years ]

    An AESI is defined as an AE occurring during any study phase that fulfills one of the following criteria:

    • Liver function enzyme elevations 2 × the upper limit of normal
    • New neoplasms or malignancies
    • New incidence or exacerbation of a pre-existing neurologic disorder
    • New incidence or exacerbation of a prior rheumatologic or other autoimmune disorder
    • New incidence of hematologic disorder.



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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Participants with SMA (with 1, 2 or 3 copies of SMN2) who received onasemnogene abeparvovec-xioi gene replacement therapy in an AveXis clinical study
  • Participant/parent/legal guardian willing and able to complete the informed consent process and comply with study procedures and visit schedule

Exclusion Criteria:

  • Parent/legal guardian unable or unwilling to participate in the long-term follow-up safety study

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04042025


Contacts
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Contact: AveXis MedInfo 833-828-3947 medinfo@avexis.com

  Show 37 Study Locations
Sponsors and Collaborators
AveXis, Inc.
Investigators
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Study Chair: Doug Feltner, MD AveXis, Inc.

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Responsible Party: AveXis, Inc.
ClinicalTrials.gov Identifier: NCT04042025     History of Changes
Other Study ID Numbers: AVXS-101-LT-002
2019-002611-26 ( EudraCT Number )
First Posted: August 1, 2019    Key Record Dates
Last Update Posted: September 24, 2019
Last Verified: September 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by AveXis, Inc.:
Gene replacement
Additional relevant MeSH terms:
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Spinal Muscular Atrophies of Childhood
Muscular Atrophy
Muscular Atrophy, Spinal
Atrophy
Pathological Conditions, Anatomical
Neuromuscular Manifestations
Neurologic Manifestations
Nervous System Diseases
Signs and Symptoms
Spinal Cord Diseases
Central Nervous System Diseases
Motor Neuron Disease
Neurodegenerative Diseases
Neuromuscular Diseases
Heredodegenerative Disorders, Nervous System
Genetic Diseases, Inborn