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    Clinical Trial Results:
    A Long-Term Safety Study of Maralixibat, an Apical Sodium Dependent Bile Acid Transporter Inhibitor (ASBTi), in the Treatment of Cholestatic Liver Disease in Subjects Who Previously Participated in a Maralixibat Study.

    Summary
    EudraCT number
    2019-002755-42
    Trial protocol
    BE   GB   PL   FR   ES  
    Global end of trial date
    04 Sep 2024

    Results information
    Results version number
    v1(current)
    This version publication date
    18 May 2025
    First version publication date
    18 May 2025
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    MRX-800
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT04168385
    WHO universal trial number (UTN)
    -
    Other trial identifiers
    INDs: 119916; 119917; 147617
    Sponsors
    Sponsor organisation name
    Mirum Pharmaceuticals Inc.
    Sponsor organisation address
    989 E Hillsdale Blvd. Suite 300, Foster City, United States, 94404
    Public contact
    Chief Development Officer, Mirum Pharmaceuticals Inc., +1 6506674085, medinfo@mirumpharma.com
    Scientific contact
    Chief Development Officer, Mirum Pharmaceuticals Inc., +1 6506674085, medinfo@mirumpharma.com
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    No
    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
    16 Oct 2024
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    04 Sep 2024
    Global end of trial reached?
    Yes
    Global end of trial date
    04 Sep 2024
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    Evaluate the long-term safety of maralixibat in subjects with cholestatic liver disease including, but not limited to, ALGS and PFIC.
    Protection of trial subjects
    All study participants (caregivers as applicable) were required to read and sign an Informed Consent Form (ICF). Participants were re-consented to the most current version of the ICF(s) during their participation in the study.
    Background therapy
    -
    Evidence for comparator
    -
    Actual start date of recruitment
    16 Jan 2020
    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
    Poland: 2
    Country: Number of subjects enrolled
    Spain: 1
    Country: Number of subjects enrolled
    United Kingdom: 11
    Country: Number of subjects enrolled
    Belgium: 2
    Country: Number of subjects enrolled
    France: 4
    Country: Number of subjects enrolled
    United States: 26
    Country: Number of subjects enrolled
    Australia: 4
    Country: Number of subjects enrolled
    Canada: 2
    Worldwide total number of subjects
    52
    EEA total number of subjects
    9
    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)
    0
    Children (2-11 years)
    34
    Adolescents (12-17 years)
    12
    Adults (18-64 years)
    6
    From 65 to 84 years
    0
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    A total of 52 participants were enrolled at 17 sites across 8 countries (Australia, Belgium, Canada, France, Poland, Spain, United Kingdom and United States). Participants were previously on maralixibat for an average of 4 years before entering this study.

    Pre-assignment
    Screening details
    The screening period starts when informed consent (by the legally authorized representative) is signed. The duration of the screening period is up to 4 weeks, during which all procedures listed for the screening visit in the schedule of assessment must be completed. A total of 43 subjects completed the study and a total of 9 discontinued early.

    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
    Maralixibat
    Arm description
    Maralixibat chloride oral solution orally twice daily Up to 1.2* mg/kg/day), and according to indication. *equivalent to 1.14 mg/kg/day maralixibat. Doses reported here are in maralixibat chloride. Participants with ALGS received maralixibat doses in the range of 0.15 mg/kg QD to 0.45 mg/kg BID. Participants with PFIC received maralixibat doses in the range of 0.3 mg/kg QD to 0.6 mg/kg BID.
    Arm type
    Experimental

    Investigational medicinal product name
    Maralixibat Chloride
    Investigational medicinal product code
    Other name
    Maralixibat
    Pharmaceutical forms
    Oral solution in bottle
    Routes of administration
    Oral use
    Dosage and administration details
    Four different strengths of the maralixibat oral solution (5, 10, 15, and 20 mg/mL) were used; dosing was based on participant weight.

    Number of subjects in period 1
    Maralixibat
    Started
    52
    Completed
    43
    Not completed
    9
         Consent withdrawn by subject
    1
         Adverse event
    3
         Liver transplant
    4
         Listed for liver transplant
    1

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Maralixibat
    Reporting group description
    Maralixibat chloride oral solution orally twice daily Up to 1.2* mg/kg/day), and according to indication. *equivalent to 1.14 mg/kg/day maralixibat. Doses reported here are in maralixibat chloride. Participants with ALGS received maralixibat doses in the range of 0.15 mg/kg QD to 0.45 mg/kg BID. Participants with PFIC received maralixibat doses in the range of 0.3 mg/kg QD to 0.6 mg/kg BID.

    Reporting group values
    Maralixibat Total
    Number of subjects
    52 52
    Age categorical
    Age at time of the baseline visit.
    Units: Subjects
        5 to 8 years
    12 12
        9 to 12 years
    25 25
        13 to 18 years
    10 10
        > 18 years
    5 5
    Age continuous
    Age at time of the baseline visit.
    Units: years
        arithmetic mean (standard deviation)
    11.3 ( 4.19 ) -
    Gender categorical
    Units: Subjects
        Female
    26 26
        Male
    26 26
    Subject analysis sets

    Subject analysis set title
    ALGS
    Subject analysis set type
    Safety analysis
    Subject analysis set description
    Includes all participants with Alagille Syndrome (ALGS) who received at least one dose of maralixibat.

    Subject analysis set title
    PFIC
    Subject analysis set type
    Safety analysis
    Subject analysis set description
    Includes all participants with Progressive Familial Intrahepatic Cholestasis (PFIC) who received at least one dose of maralixibat.

    Subject analysis sets values
    ALGS PFIC
    Number of subjects
    40
    12
    Age categorical
    Age at time of the baseline visit.
    Units: Subjects
        5 to 8 years
    8
    4
        9 to 12 years
    18
    7
        13 to 18 years
    9
    1
        > 18 years
    5
    0
    Age continuous
    Age at time of the baseline visit.
    Units: years
        arithmetic mean (standard deviation)
    12 ( 4.28 )
    8.8 ( 2.82 )
    Gender categorical
    Units: Subjects
        Female
    19
    7
        Male
    21
    5

    End points

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    End points reporting groups
    Reporting group title
    Maralixibat
    Reporting group description
    Maralixibat chloride oral solution orally twice daily Up to 1.2* mg/kg/day), and according to indication. *equivalent to 1.14 mg/kg/day maralixibat. Doses reported here are in maralixibat chloride. Participants with ALGS received maralixibat doses in the range of 0.15 mg/kg QD to 0.45 mg/kg BID. Participants with PFIC received maralixibat doses in the range of 0.3 mg/kg QD to 0.6 mg/kg BID.

    Subject analysis set title
    ALGS
    Subject analysis set type
    Safety analysis
    Subject analysis set description
    Includes all participants with Alagille Syndrome (ALGS) who received at least one dose of maralixibat.

    Subject analysis set title
    PFIC
    Subject analysis set type
    Safety analysis
    Subject analysis set description
    Includes all participants with Progressive Familial Intrahepatic Cholestasis (PFIC) who received at least one dose of maralixibat.

    Primary: Incidence of Treatment-Emergent Adverse Events

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    End point title
    Incidence of Treatment-Emergent Adverse Events [1]
    End point description
    TEAE = Treatment-emergent Adverse Event; AESI = Adverse Event of Special Interest.
    End point type
    Primary
    End point timeframe
    From Baseline through End of Treatment (up to approximately 4 years)
    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: The primary endpoint data was a count of occurrences, and no statistical analysis was performed.
    End point values
    Maralixibat ALGS PFIC
    Number of subjects analysed
    52
    40
    12
    Units: Number of participants
        At least one TEAE
    48
    36
    12
        TEAE ≥ 3
    13
    9
    4
        Serious TEAE
    13
    10
    3
        Serious Treatment-Related Adverse Event
    0
    0
    0
        Serious Treatment-Related TEAE
    0
    0
    0
        TEAE Leading to Discontinuation of Study Drug
    4
    3
    1
        TEAE Leading to Death
    1
    1
    0
        Treatment-emergent AESI
    1
    0
    1
    No statistical analyses for this end point

    Secondary: Long-Term Effect on Pruritus

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    End point title
    Long-Term Effect on Pruritus
    End point description
    Change from Baseline in Pruritus Severity assessed using the Clinician Scratch Score (CSS), a 5-point scale where 0 indicates no evidence of scratching and 4 indicates cutaneous mutilation with bleeding, hemorrhage, and scarring.
    End point type
    Secondary
    End point timeframe
    From Baseline through Week 160, including Change from Baseline values.
    End point values
    ALGS PFIC
    Number of subjects analysed
    40
    12
    Units: Pruritus severity score
        arithmetic mean (standard deviation)
    -0.4 ( 0.89 )
    -0.3 ( 1.12 )
    No statistical analyses for this end point

    Secondary: Long-Term Effect on Serum Bile Acid Levels

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    End point title
    Long-Term Effect on Serum Bile Acid Levels
    End point description
    End point type
    Secondary
    End point timeframe
    From Baseline through Week 160, including Change from Baseline values.
    End point values
    Maralixibat ALGS PFIC
    Number of subjects analysed
    52
    40
    12
    Units: Serum bile acid levels (µmol/L)
        arithmetic mean (standard deviation)
    -56.994 ( 111.0334 )
    -15.948 ( 31.4239 )
    -82.647 ( 136.4354 )
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    Baseline to end of treatment
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    22.1
    Reporting groups
    Reporting group title
    PFIC
    Reporting group description
    All participants in the PFIC arm who received maralixibat and were included in the AE analysis.

    Reporting group title
    ALGS
    Reporting group description
    All participants in the ALGS arm who received maralixibat and were included in the AE analysis.

    Serious adverse events
    PFIC ALGS
    Total subjects affected by serious adverse events
         subjects affected / exposed
    3 / 12 (25.00%)
    11 / 40 (27.50%)
         number of deaths (all causes)
    0
    1
         number of deaths resulting from adverse events
    0
    0
    Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    Nodular lymphocyte predominant Hodgkin lymphoma
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Vascular disorders
    Hypertension
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    General disorders and administration site conditions
    Condition aggravated
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Oedema peripheral
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Pyrexia
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Respiratory, thoracic and mediastinal disorders
    Fibrinous bronchitis
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Hepatopulmonary syndrome
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Injury, poisoning and procedural complications
    Gastrointestinal procedural complication
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Femur fracture
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Ulna fracture
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    1 / 1
    Congenital, familial and genetic disorders
    Coarctation of the aorta
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Alagille syndrome
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 2
         deaths causally related to treatment / all
    0 / 0
    0 / 1
    Arteriovenous malformation
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Cardiac disorders
    Tachycardia
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Nervous system disorders
    Ataxia
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Cerebral haemorrhage
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Dizziness
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Headache
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Neuralgia
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Seizure
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Syncope
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Blood and lymphatic system disorders
    Febrile neutropenia
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 2
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Gastrointestinal disorders
    Abdominal mass
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Anal fissure
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Constipation
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Colitis ulcerative
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Dyspepsia
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Nausea
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Skin and subcutaneous tissue disorders
    Rash
         subjects affected / exposed
    0 / 12 (0.00%)
    1 / 40 (2.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Pruritus
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Musculoskeletal and connective tissue disorders
    Arthritis
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Infections and infestations
    Lung abscess
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    PFIC ALGS
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    12 / 12 (100.00%)
    39 / 40 (97.50%)
    Vascular disorders
    Hypertension
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    2
    General disorders and administration site conditions
    Pyrexia
         subjects affected / exposed
    2 / 12 (16.67%)
    8 / 40 (20.00%)
         occurrences all number
    4
    11
    Fatigue
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    2
    Oedema peripheral
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    3
    Peripheral swelling
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Immune system disorders
    Seasonal allergy
         subjects affected / exposed
    1 / 12 (8.33%)
    5 / 40 (12.50%)
         occurrences all number
    1
    7
    Allergy to arthropod sting
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Hypersensitivity
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Respiratory, thoracic and mediastinal disorders
    Cough
         subjects affected / exposed
    2 / 12 (16.67%)
    3 / 40 (7.50%)
         occurrences all number
    2
    3
    Epistaxis
         subjects affected / exposed
    0 / 12 (0.00%)
    6 / 40 (15.00%)
         occurrences all number
    0
    13
    Nasal congestion
         subjects affected / exposed
    3 / 12 (25.00%)
    1 / 40 (2.50%)
         occurrences all number
    3
    1
    Oropharyngeal pain
         subjects affected / exposed
    2 / 12 (16.67%)
    4 / 40 (10.00%)
         occurrences all number
    2
    4
    Sleep apnoea syndrome
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    1
    Rhinorrhoea
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Psychiatric disorders
    Depression
         subjects affected / exposed
    0 / 12 (0.00%)
    3 / 40 (7.50%)
         occurrences all number
    0
    3
    Insomnia
         subjects affected / exposed
    0 / 12 (0.00%)
    3 / 40 (7.50%)
         occurrences all number
    0
    3
    Executive dysfunction
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Attention deficit/hyperactivity disorder
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Anxiety
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Investigations
    Alanine aminotransferase increased
         subjects affected / exposed
    1 / 12 (8.33%)
    3 / 40 (7.50%)
         occurrences all number
    1
    3
    Blood bilirubin increased
         subjects affected / exposed
    2 / 12 (16.67%)
    2 / 40 (5.00%)
         occurrences all number
    4
    2
    Ultrasound liver abnormal
         subjects affected / exposed
    1 / 12 (8.33%)
    4 / 40 (10.00%)
         occurrences all number
    1
    4
    Vitamin D decreased
         subjects affected / exposed
    1 / 12 (8.33%)
    3 / 40 (7.50%)
         occurrences all number
    1
    4
    Weight decreased
         subjects affected / exposed
    0 / 12 (0.00%)
    3 / 40 (7.50%)
         occurrences all number
    0
    3
    Aspartate aminotransferase increased
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    1
    Vitamin A decreased
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    2
    Blood calcium decreased
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Blood phosphorus decreased
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Hepatic enzyme increased
         subjects affected / exposed
    2 / 12 (16.67%)
    0 / 40 (0.00%)
         occurrences all number
    6
    0
    Spleen scan abnormal
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Bilirubin conjugated increased
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Anti-transglutaminase antibody increased
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Injury, poisoning and procedural complications
    Contusion
         subjects affected / exposed
    1 / 12 (8.33%)
    2 / 40 (5.00%)
         occurrences all number
    1
    2
    Radius fracture
         subjects affected / exposed
    1 / 12 (8.33%)
    2 / 40 (5.00%)
         occurrences all number
    1
    2
    Vaccination complication
         subjects affected / exposed
    0 / 12 (0.00%)
    3 / 40 (7.50%)
         occurrences all number
    0
    5
    Skin abrasion
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    1
    Stress fracture
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    1
    Femur fracture
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    2
    Sunburn
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Arthropod bite
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Face injury
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Oral contusion
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Hand fracture
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Stoma site haemorrhage
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Nervous system disorders
    Headache
         subjects affected / exposed
    1 / 12 (8.33%)
    4 / 40 (10.00%)
         occurrences all number
    1
    4
    Lethargy
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    3
    Head discomfort
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Blood and lymphatic system disorders
    Splenomegaly
         subjects affected / exposed
    0 / 12 (0.00%)
    3 / 40 (7.50%)
         occurrences all number
    0
    4
    Anaemia
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    2
    Ear and labyrinth disorders
    Ear pain
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    3
    Gastrointestinal disorders
    Abdominal pain
         subjects affected / exposed
    3 / 12 (25.00%)
    8 / 40 (20.00%)
         occurrences all number
    7
    12
    Abdominal pain upper
         subjects affected / exposed
    1 / 12 (8.33%)
    3 / 40 (7.50%)
         occurrences all number
    1
    3
    Constipation
         subjects affected / exposed
    2 / 12 (16.67%)
    1 / 40 (2.50%)
         occurrences all number
    2
    2
    Dental caries
         subjects affected / exposed
    2 / 12 (16.67%)
    1 / 40 (2.50%)
         occurrences all number
    3
    1
    Diarrhoea
         subjects affected / exposed
    4 / 12 (33.33%)
    3 / 40 (7.50%)
         occurrences all number
    7
    3
    Gastrooesophageal reflux disease
         subjects affected / exposed
    1 / 12 (8.33%)
    2 / 40 (5.00%)
         occurrences all number
    2
    2
    Nausea
         subjects affected / exposed
    1 / 12 (8.33%)
    2 / 40 (5.00%)
         occurrences all number
    1
    6
    Toothache
         subjects affected / exposed
    3 / 12 (25.00%)
    2 / 40 (5.00%)
         occurrences all number
    4
    2
    Vomiting
         subjects affected / exposed
    2 / 12 (16.67%)
    2 / 40 (5.00%)
         occurrences all number
    2
    2
    Pancreatic failure
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Food poisoning
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Aphthous ulcer
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Hepatobiliary disorders
    Hepatic mass
         subjects affected / exposed
    1 / 12 (8.33%)
    5 / 40 (12.50%)
         occurrences all number
    1
    5
    Biliary colic
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Liver injury
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Cholelithiasis
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Skin and subcutaneous tissue disorders
    Acne
         subjects affected / exposed
    0 / 12 (0.00%)
    3 / 40 (7.50%)
         occurrences all number
    0
    3
    Alopecia
         subjects affected / exposed
    2 / 12 (16.67%)
    2 / 40 (5.00%)
         occurrences all number
    2
    2
    Pruritus
         subjects affected / exposed
    3 / 12 (25.00%)
    3 / 40 (7.50%)
         occurrences all number
    6
    3
    Rash
         subjects affected / exposed
    3 / 12 (25.00%)
    2 / 40 (5.00%)
         occurrences all number
    3
    2
    Rash erythematous
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    1
    Xanthoma
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    2
    Dry skin
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    2
    Rash papular
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    1
    Erythema
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    1
    Urticaria
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Milia
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Endocrine disorders
    Delayed puberty
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Musculoskeletal and connective tissue disorders
    Back pain
         subjects affected / exposed
    1 / 12 (8.33%)
    4 / 40 (10.00%)
         occurrences all number
    1
    4
    Pain in extremity
         subjects affected / exposed
    3 / 12 (25.00%)
    4 / 40 (10.00%)
         occurrences all number
    4
    6
    Myalgia
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Epiphyses delayed fusion
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Growing pains
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Infections and infestations
    Ear infection
         subjects affected / exposed
    2 / 12 (16.67%)
    2 / 40 (5.00%)
         occurrences all number
    2
    3
    Nasopharyngitis
         subjects affected / exposed
    4 / 12 (33.33%)
    8 / 40 (20.00%)
         occurrences all number
    6
    17
    Upper respiratory tract infection
         subjects affected / exposed
    5 / 12 (41.67%)
    4 / 40 (10.00%)
         occurrences all number
    8
    6
    Otitis media
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    4
    Corona virus infection
         subjects affected / exposed
    9 / 12 (75.00%)
    9 / 40 (22.50%)
         occurrences all number
    14
    10
    Gastroenteritis viral
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    1
    Lower respiratory tract infection
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    2
    Urinary tract infection
         subjects affected / exposed
    1 / 12 (8.33%)
    1 / 40 (2.50%)
         occurrences all number
    1
    1
    Tonsillitis
         subjects affected / exposed
    2 / 12 (16.67%)
    0 / 40 (0.00%)
         occurrences all number
    2
    0
    Viral infection
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Body tinea
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Otitis externa
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Gastrointestinal viral infection
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Impetigo
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Fungal skin infection
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Large intestine infection
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0
    Metabolism and nutrition disorders
    Vitamin D deficiency
         subjects affected / exposed
    3 / 12 (25.00%)
    4 / 40 (10.00%)
         occurrences all number
    4
    4
    Vitamin E deficiency
         subjects affected / exposed
    1 / 12 (8.33%)
    3 / 40 (7.50%)
         occurrences all number
    2
    3
    Vitamin A deficiency
         subjects affected / exposed
    0 / 12 (0.00%)
    2 / 40 (5.00%)
         occurrences all number
    0
    2
    Vitamin K deficiency
         subjects affected / exposed
    1 / 12 (8.33%)
    0 / 40 (0.00%)
         occurrences all number
    1
    0

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    12 Nov 2020
    Released in 2020, this amendment expanded the MRX-800 study to include participants with biliary atresia, in addition to those with Alagille syndrome (ALGS) and progressive familial intrahepatic cholestasis (PFIC). The study continued to focus on evaluating the long-term safety of maralixibat in individuals with rare cholestatic liver diseases. Key changes made: - Expanded Population: Inclusion criteria were revised to allow enrolment of participants with biliary atresia and those who had previously discontinued maralixibat studies for non-safety reasons. - Study Objectives: Primary, secondary, and exploratory objectives were updated to reflect the inclusion of biliary atresia and new outcome measures. - New Assessments: Growth and neurodevelopmental evaluations were added for participants with biliary atresia. Pharmacokinetic testing was removed to reduce participant burden. - Dose Adjustments: The protocol allowed for higher maralixibat dosing in some cases, based on individual response and safety. - Safety Monitoring: Additional monitoring and liver safety guidelines were introduced for biliary atresia, including criteria for treatment interruption and investigation of cholangitis. - Outcome Measures: New endpoints included changes in bilirubin levels and growth parameters specific to biliary atresia. - Other Updates: Adjustments were made to pregnancy testing procedures, geographic scope of study sites, drug packaging, and data collection processes. Provisions for study conduct during events such as pandemics were also added.

    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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