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    Clinical Trial Results:
    A Phase IV Open-label, single-arm, single-dose, multicenter study to evaluate the saFEty, toLerability and effIcacy of gene replacement therapy with intravenous OAV101 (AVXS-101) in pediatric participants from Latin America with spinal muscular atrophy (SMA) - OFELIA

    Summary
    EudraCT number
    2023-000864-67
    Trial protocol
    Outside EU/EEA  
    Global end of trial date
    08 Aug 2023

    Results information
    Results version number
    v1(current)
    This version publication date
    21 Feb 2024
    First version publication date
    21 Feb 2024
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    COAV101A1IC01
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT05073133
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Novartis Pharma AG
    Sponsor organisation address
    Novartis Campus, Basel, Switzerland,
    Public contact
    Clinical Disclosure Office, Novartis Pharma AG, 41 613241111, Novartis.email@Novartis.com
    Scientific contact
    Clinical Disclosure Office, Novartis Pharma AG, 41 613241111, Novartis.email@Novartis.com
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    Yes
    EMA paediatric investigation plan number(s)
    EMEA-002168-PIP01-17
    Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial?
    Yes
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    08 Aug 2023
    Is this the analysis of the primary completion data?
    No
    Global end of trial reached?
    Yes
    Global end of trial date
    08 Aug 2023
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    The primary objective was to assess the safety and tolerability of OAV101 over an 18-months post-infusion period in participants with SMA weighing ≤ 17 kg. The primary endpoint was to evaluate treatment emergent AEs and SAEs; to evaluate important identified and potential risks and to evaluate changes from baseline in vital signs, cardiac safety assessments, and clinical laboratory results. The secondary endpoint was to evaluate the efficacy of OAV101 at 6-, 12-, and 18-months post-infusion in participants with SMA weighing ≤ 17 kg, as measured by Development Motor Milestones according to the World Health Organization Multicentre Growth Reference Study (WHO-MGRS).
    Protection of trial subjects
    The study was in compliance with the ethical principles derived from the Declaration of Helsinki and the International Conference on Harmonization (ICH) Good Clinical Practice (GCP) guidelines. All the local regulatory requirements pertinent to safety of trial subjects were also followed during the conduct of the trial.
    Background therapy
    -
    Evidence for comparator
    -
    Actual start date of recruitment
    04 Nov 2021
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    Yes
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    Brazil: 10
    Country: Number of subjects enrolled
    Argentina: 6
    Worldwide total number of subjects
    16
    EEA total number of subjects
    0
    Number of subjects enrolled per age group
    In utero
    0
    Preterm newborn - gestational age < 37 wk
    0
    Newborns (0-27 days)
    0
    Infants and toddlers (28 days-23 months)
    16
    Children (2-11 years)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    0
    From 65 to 84 years
    0
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    16 participants were enrolled into the study, at five sites from Brazil (three sites) and Argentina (two sites). Six participants were from Argentina and 10 from Brazil.

    Pre-assignment
    Screening details
    On Day -1, participants were admitted to the hospital for pre-treatment baseline procedures including prednisolone treatment per study protocol.

    Period 1
    Period 1 title
    Overall Study (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Not applicable
    Blinding used
    Not blinded

    Arms
    Arm title
    OAV101
    Arm description
    A single IV infusion at 1.1e14 vg/kg over approximately 60 minutes
    Arm type
    Experimental

    Investigational medicinal product name
    Onasemnogene abeparvovec
    Investigational medicinal product code
    OAV101
    Other name
    AVXS-101; Zolgensma; Onasemnogene abeparvovec
    Pharmaceutical forms
    Solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    1.1e14 vg/kg

    Number of subjects in period 1
    OAV101
    Started
    16
    Completed
    14
    Not completed
    2
         Adverse event, serious fatal
    2

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    OAV101
    Reporting group description
    A single IV infusion at 1.1e14 vg/kg over approximately 60 minutes

    Reporting group values
    OAV101 Total
    Number of subjects
    16 16
    Age categorical
    Units: Subjects
        In utero
    0 0
        Preterm newborn infants (gestational age < 37 wks)
    0 0
        Newborns (0-27 days)
    0 0
        Infants and toddlers (28 days-23 months)
    16 16
        Children (2-11 years)
    0 0
        Adolescents (12-17 years)
    0 0
        Adults (18-64 years)
    0 0
        From 65-84 years
    0 0
        85 years and over
    0 0
    Age Continuous
    Units: months
        arithmetic mean (standard deviation)
    15.79 ( 5.89 ) -
    Sex: Female, Male
    Units: Participants
        Female
    11 11
        Male
    5 5

    End points

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    End points reporting groups
    Reporting group title
    OAV101
    Reporting group description
    A single IV infusion at 1.1e14 vg/kg over approximately 60 minutes

    Primary: Number of Participants with treatment emergent AEs and SAEs

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    End point title
    Number of Participants with treatment emergent AEs and SAEs [1]
    End point description
    An AE is any untoward medical occurrence (eg any unfavorable and unintended sign [including abnormal laboratory findings], symptom or disease) in a clinical investigation participant after providing written informed consent for participation in the study. Therefore, an AE may or may not be temporally or causally associated with the use of a medicinal (investigational) product. Changes from baseline in vital signs, cardiac safety assessments, and clinical laboratory results are reported as Adverse Events if clinically significant and as applicable, per investigator assessment. Disc. = discontinuation
    End point type
    Primary
    End point timeframe
    Up to Month 18
    Notes
    [1] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point.
    Justification: Not applicable for AEs and also not applicable for single arm studies.
    End point values
    OAV101
    Number of subjects analysed
    16
    Units: Participants
        Any treatment-emergent adverse events (AEs)
    16
        Any treatment-emergent AEs related to OAV101
    11
        Any serious treatment-emergent adverse events
    11
        Serious treatment-emergent AEs related to OAV101
    3
        Treatment-emergent AEs leading to study disc.
    0
        Treatment-emergent AEs leading to death
    2
        Treatment-emergent AEs of special interest
    12
    No statistical analyses for this end point

    Primary: Evaluation of important identified and important potential risks - treatment-emergent adverse events of special interest

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    End point title
    Evaluation of important identified and important potential risks - treatment-emergent adverse events of special interest [2]
    End point description
    An AE is any untoward medical occurrence (eg any unfavorable and unintended sign [including abnormal laboratory findings], symptom or disease) in a clinical investigation participant after providing written informed consent for participation in the study. Therefore, an AE may or may not be temporally or causally associated with the use of a medicinal (investigational) product. Adverse events of special interest (AESI) are defined by the important identified risk and important potential risk: Hepatotoxicity, Thrombocytopenia, Cardiac adverse events, Sensory abnormalities suggestive of ganglionopathy, and Thrombotic microangiopathy. These were assessed by the investigator. PT = preferred term
    End point type
    Primary
    End point timeframe
    Up to Month 18
    Notes
    [2] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point.
    Justification: Not applicable for AEs and also not applicable for single arm studies.
    End point values
    OAV101
    Number of subjects analysed
    16
    Units: Participants
        Risk name: Hepatotoxicity
    11
        -PT: Aspartate aminotransferase increased
    5
        -PT: Alanine aminotransferase increased
    5
        -PT: Blood alkaline phosphatase increased
    2
        -Preferred term: Bilirubin conjugated increased
    2
        -PT: Gamma-glutamyltransferase increased
    5
        -Preferred term: Hepatic enzyme increased
    3
        -Preferred term: Hepatic failure
    1
        -Preferred term: Transaminases increased
    2
        Risk name: Thrombocytopenia
    5
        -Preferred term: Platelet count decreased
    4
        -Preferred term: Thrombocytopenia
    1
        Risk name: Thrombotic microangiopathy
    2
        -Preferred term: Thrombotic microangiopathy
    2
    No statistical analyses for this end point

    Secondary: Number of participants who achieve Development Motor Milestones according to the World Health Organization-Multicentre Growth Reference Study (WHO-MGRS)

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    End point title
    Number of participants who achieve Development Motor Milestones according to the World Health Organization-Multicentre Growth Reference Study (WHO-MGRS)
    End point description
    The World Health Organization-Multicentre Growth Reference Study (WHO-MGRS) was used to measure developmental motor milestones. This was assessed via the milestone checklist. The 6 developmental milestones are: sitting without support, hands-and-knees crawling, standing with assistance, walking with assistance, standing alone and walking alone. A yes response indicates that the patient reached a particular development milestone.
    End point type
    Secondary
    End point timeframe
    Baseline (Screening), and at Weeks 26, 52 and 78
    End point values
    OAV101
    Number of subjects analysed
    16
    Units: Participants
        Screening - Sitting without support
    6
        Screening - Hands-and-knees crawling
    2
        Screening - Standing with assistance
    1
        Screening - Walking with assistance
    0
        Screening - Standing alone
    0
        Screening - Walking alone
    0
        Week 26 Sitting without support (n=14)
    12
        Week 26 Hands-and-knees crawling (n=14)
    2
        Week 26 Standing with assistance (n=14)
    2
        Week 26 Walking with assistance (n=14)
    2
        Week 26 Standing alone (n=14)
    1
        Week 26 Walking alone (n=14)
    0
        Week 52 Sitting without support (n=13)
    10
        Week 52 Hands-and-knees crawling (n=13)
    4
        Week 52 Standing with assistance (n=13)
    7
        Week 52 Walking with assistance (n=13)
    3
        Week 52 Standing alone (n=13)
    6
        Week 52 Walking alone (n=13)
    2
        Week 78 Sitting without support (n=12)
    10
        Week 78 Hands-and-knees crawling (n=12)
    3
        Week 78 Standing with assistance (n=12)
    7
        Week 78 Walking with assistance (n=12)
    2
        Week 78 Standing alone (n=12)
    3
        Week 78 Walking alone (n=12)
    1
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    Adverse events are reported from the single dose of study treatment plus 18 months post treatment, up to a maximum duration of 18 months.
    Adverse event reporting additional description
    Consistent with EudraCT disclosure specifications, Novartis has reported under the Serious adverse events field “number of deaths resulting from adverse events” all those deaths, resulting from serious adverse events that are deemed to be causally related to treatment by the investigator.
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    24.0
    Reporting groups
    Reporting group title
    OAV101A1
    Reporting group description
    A single IV infusion at 1.1e14 vg/kg over approximately 60 minutes

    Serious adverse events
    OAV101A1
    Total subjects affected by serious adverse events
         subjects affected / exposed
    11 / 16 (68.75%)
         number of deaths (all causes)
    2
         number of deaths resulting from adverse events
    1
    Blood and lymphatic system disorders
    Thrombotic microangiopathy
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences causally related to treatment / all
    2 / 2
         deaths causally related to treatment / all
    1 / 1
    General disorders and administration site conditions
    Pyrexia
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Gastrointestinal disorders
    Vomiting
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    Hepatobiliary disorders
    Hepatic failure
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    1 / 1
    Respiratory, thoracic and mediastinal disorders
    Pneumonia aspiration
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Upper respiratory tract congestion
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Renal and urinary disorders
    Renal failure
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    1 / 1
         deaths causally related to treatment / all
    1 / 1
    Infections and infestations
    Bronchiolitis
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences causally related to treatment / all
    0 / 4
         deaths causally related to treatment / all
    0 / 0
    COVID-19
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences causally related to treatment / all
    0 / 2
         deaths causally related to treatment / all
    0 / 0
    Gastroenteritis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences causally related to treatment / all
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    Respiratory tract infection
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences causally related to treatment / all
    0 / 4
         deaths causally related to treatment / all
    0 / 1
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    OAV101A1
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    16 / 16 (100.00%)
    Investigations
    Alanine aminotransferase increased
         subjects affected / exposed
    5 / 16 (31.25%)
         occurrences all number
    5
    White blood cell count increased
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Transaminases increased
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    3
    Platelet count decreased
         subjects affected / exposed
    4 / 16 (25.00%)
         occurrences all number
    4
    Hepatic enzyme increased
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences all number
    3
    Gamma-glutamyltransferase increased
         subjects affected / exposed
    5 / 16 (31.25%)
         occurrences all number
    5
    Blood lactate dehydrogenase increased
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Blood alkaline phosphatase increased
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Bilirubin conjugated increased
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Aspartate aminotransferase increased
         subjects affected / exposed
    5 / 16 (31.25%)
         occurrences all number
    9
    Injury, poisoning and procedural complications
    Femur fracture
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Blood and lymphatic system disorders
    Thrombocytopenia
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    General disorders and administration site conditions
    Pyrexia
         subjects affected / exposed
    7 / 16 (43.75%)
         occurrences all number
    14
    Immune system disorders
    Hypersensitivity
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Gastrointestinal disorders
    Constipation
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Vomiting
         subjects affected / exposed
    7 / 16 (43.75%)
         occurrences all number
    8
    Stomatitis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Salivary hypersecretion
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Diarrhoea
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    3
    Nausea
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Respiratory, thoracic and mediastinal disorders
    Tonsillitis
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Laryngitis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Cough
         subjects affected / exposed
    4 / 16 (25.00%)
         occurrences all number
    4
    Catarrh
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Upper respiratory tract congestion
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    5
    Rhinorrhoea
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Skin and subcutaneous tissue disorders
    Subcutaneous emphysema
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Rash
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Psychiatric disorders
    Irritability
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Infections and infestations
    Viral infection
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Urinary tract infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    2
    Upper respiratory tract infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Rhinitis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Pneumonia bacterial
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Pneumonia
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    3
    Influenza
         subjects affected / exposed
    3 / 16 (18.75%)
         occurrences all number
    3
    Gastroenteritis
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Coxsackie viral infection
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Conjunctivitis
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    COVID-19
         subjects affected / exposed
    2 / 16 (12.50%)
         occurrences all number
    2
    Asymptomatic bacteriuria
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Metabolism and nutrition disorders
    Hypoglycaemia
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1
    Decreased appetite
         subjects affected / exposed
    1 / 16 (6.25%)
         occurrences all number
    1

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    24 Mar 2022
    Numbering correction in the Protocol summary section exclusion criteria; Removal of Canada as a participant country; Adjustment of project title considering the removal of Canada; Removal of Murray´s Secretions Severity Rating Scale; Removal of Yale Pharyngeal Severity Rating Scale; Removal of Anti-SMN antibodies in serum assessment as an exploratory objective; Protocol improvements to confirm that the participants may be discharged 12-48 hours after the infusion, based on Investigator judgment; Protocol improvements to confirm that the safety profile of OAV101 is described in the Investigator Brochure (IB) or package insert; Numbering adjustment performed for items 6.1.2 Additional Study Treatment and 6.1.3 Supply of study treatment; Adjustment in the item 8-1 Assessment Schedule – visit window.

    Interruptions (globally)

    Were there any global interruptions to the trial? No

    Limitations and caveats

    Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data.
    None reported
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    The status and protocol content of GB trials is no longer updated since 1 January 2021. For the UK, as of 31 January 2021, EU Law applies only to the territory of Northern Ireland (NI) to the extent foreseen in the Protocol on Ireland/NI. Legal notice
    As of 31 January 2023, all EU/EEA initial clinical trial applications must be submitted through CTIS . Updated EudraCT trials information and information on PIP/Art 46 trials conducted exclusively in third countries continues to be submitted through EudraCT and published on this website.

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