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    Clinical Trial Results:
    An Open-label Study Evaluating the Safety, Antiviral Activity, and Pharmacokinetics of IMC-I109V in HLA-A*02:01 Positive Patients with Chronic HBV who are Non-Cirrhotic, Hepatitis B e Antigen-negative, and Virally Suppressed

    Summary
    EudraCT number
    2019-004212-64
    Trial protocol
    BE   GB   PL   RO   DK  
    Global end of trial date
    23 Dec 2024

    Results information
    Results version number
    v1(current)
    This version publication date
    08 Jan 2026
    First version publication date
    08 Jan 2026
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    IMC-I109V-101
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    -
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Immunocore, Ltd
    Sponsor organisation address
    92 Park Drive, Milton Park, Abingdon, Oxon, United Kingdom, OX14 4RY
    Public contact
    Information Desk, Immunocore Ltd, +44(0) 1235438600, info@immunocore.com
    Scientific contact
    Regulatory Affairs, Immunocore Ltd, +44(0) 1235438600, Regaffairsgroup@immunocore.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?
    No
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    28 Mar 2025
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    23 Dec 2024
    Global end of trial reached?
    Yes
    Global end of trial date
    23 Dec 2024
    Was the trial ended prematurely?
    Yes
    General information about the trial
    Main objective of the trial
    Primary (Part 1 – Single Ascending Dose [SAD]) To evaluate the safety and tolerability of IMC-I109V when administered as a single dose in virally suppressed, Hepatitis B e-antigen (HBeAg)-negative participants Primary (Part 2 – Multiple Ascending Dose [MAD]) To evaluate the safety and tolerability of IMC-I109V when administered in a multiple dose schedule up to Week 24 in virally suppressed, HBeAg-negative participants Primary (Part 3 - MAD hepatocellular carcinoma [HCC]) To evaluate the safety and tolerability of IMC-I109V when administered in multiple dose schedule(s) in virally suppressed participants with Hepatitis B virus [HBV]-associated HCC. Participants were HLA-A*02:01-positive adult male and female participants with chronic HBV (CHB) infection who were virally suppressed and were either non-cirrhotic, HBeAg-negative (Part 1 and Part 2 [not conducted]) or had HBV-associated HCC (Part 3).
    Protection of trial subjects
    This trial was conducted in accordance with the ethical principles of Good Clinical Practice, according to the International Conference on Harmonization (ICH) Harmonized Tripartite Guideline, in accordance with local legal and regulatory requirements, and in compliance with the Declaration of Helsinki (with amendments).
    Background therapy
    Nucleos(t)ide analogue therapy
    Evidence for comparator
    Not applicable
    Actual start date of recruitment
    01 Oct 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
    Romania: 4
    Country: Number of subjects enrolled
    Spain: 2
    Country: Number of subjects enrolled
    United Kingdom: 5
    Country: Number of subjects enrolled
    Belgium: 2
    Country: Number of subjects enrolled
    Korea, Republic of: 5
    Country: Number of subjects enrolled
    Hong Kong: 2
    Worldwide total number of subjects
    20
    EEA total number of subjects
    8
    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)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    19
    From 65 to 84 years
    1
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    Seventeen sites in 8 countries screened participants in Part 1 - SAD. Part 2 - was planned but not conducted for strategic reasons. Part 3 - MAD HCC was initiated and 1 participant was screened but not enrolled due to screen failure.

    Pre-assignment
    Screening details
    Part 1: Participants screened: 41 Screen failures: 21 Failure to meet enrollment criteria: 19 Physician decision: 1 Other: 1 Treated: 20 Part 3: Participants screened: 1 Screen failures: 1 Enrolled: 0

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

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Part 1: IMC-I109V 0.8 mcg
    Arm description
    Participants received 1 dose of single-agent IMC-I109V 0.8 mcg on Visit Day 1.
    Arm type
    Experimental

    Investigational medicinal product name
    IMC I109V
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Concentrate for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    Dose: from 0.8 mcg to 20 mcg Strength: 0.20 mg/mL Frequency: Single dose

    Arm title
    Part 1: IMC-I109V 2.4 mcg
    Arm description
    Participants received 1 dose of single-agent IMC-I109V 2.4 mcg on Visit Day 1.
    Arm type
    Experimental

    Investigational medicinal product name
    IMC I109V
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Concentrate for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    Dose: from 0.8 mcg to 20 mcg Strength: 0.20 mg/mL Frequency: Single dose

    Arm title
    Part 1: IMC-I109V 7.0 mcg
    Arm description
    Participants received 1 dose of single-agent IMC-I109V 7.0 mcg on Visit Day 1.
    Arm type
    Experimental

    Investigational medicinal product name
    IMC I109V
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Concentrate for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    Dose: from 0.8 mcg to 20 mcg Strength: 0.20 mg/mL Frequency: Single dose

    Arm title
    Part 1: IMC-I109V 20.0 mcg
    Arm description
    Participants received 1 dose of single-agent IMC-I109V 20.0 mcg on Visit Day 1.
    Arm type
    Experimental

    Investigational medicinal product name
    IMC I109V
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Concentrate for solution for infusion
    Routes of administration
    Intravenous use
    Dosage and administration details
    Dose: from 0.8 mcg to 20 mcg Strength: 0.20 mg/mL Frequency: Single dose

    Number of subjects in period 1
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Started
    4
    2
    6
    8
    Completed
    4
    2
    6
    8

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Overall Trial
    Reporting group description
    -

    Reporting group values
    Overall Trial Total
    Number of subjects
    20 20
    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)
    0 0
        Children (2-11 years)
    0 0
        Adolescents (12-17 years)
    0 0
        Adults (18-64 years)
    19 19
        From 65-84 years
    1 1
        85 years and over
    0 0
    Age continuous
    Units: years
        arithmetic mean (standard deviation)
    47.7 ( 9.73 ) -
    Gender categorical
    Units: Subjects
        Female
    3 3
        Male
    17 17
    Race
    Units: Subjects
        American Indian or Alaska Native
    0 0
        Asian
    9 9
        Black or African American
    2 2
        Native Hawaiian or other Pacific Islander
    0 0
        White
    8 8
        Not Reported
    0 0
        Unknown
    0 0
        Other
    1 1
        Not Recorded
    0 0
    Ethnicity
    Units: Subjects
        Hispanic or Latino
    0 0
        Not Hispanic or Latino
    20 20
        Not Reported
    0 0
        Unknown
    0 0
        Other
    0 0
    Duration Since HBV Diagnosis
    Units: Subjects
        <5 years
    2 2
        >=5 to <10 years
    3 3
        >=10 years
    15 15
    HBV Genotype
    Units: Subjects
        B/C/D
    0 0
        Other Genotype
    2 2
        Missing
    18 18
    Baseline Fibroscan
    Units: Subjects
        < 7 kPa
    18 18
        >= 7 to < 9 kPa
    2 2
    Baseline HBsAg
    Units: IU/mL
        arithmetic mean (standard deviation)
    1149.3 ( 1181.1 ) -
    Height
    Units: cm
        arithmetic mean (standard deviation)
    174.60 ( 8.17 ) -
    Baseline Weight
    Units: kg
        arithmetic mean (standard deviation)
    77.98 ( 12.04 ) -

    End points

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    End points reporting groups
    Reporting group title
    Part 1: IMC-I109V 0.8 mcg
    Reporting group description
    Participants received 1 dose of single-agent IMC-I109V 0.8 mcg on Visit Day 1.

    Reporting group title
    Part 1: IMC-I109V 2.4 mcg
    Reporting group description
    Participants received 1 dose of single-agent IMC-I109V 2.4 mcg on Visit Day 1.

    Reporting group title
    Part 1: IMC-I109V 7.0 mcg
    Reporting group description
    Participants received 1 dose of single-agent IMC-I109V 7.0 mcg on Visit Day 1.

    Reporting group title
    Part 1: IMC-I109V 20.0 mcg
    Reporting group description
    Participants received 1 dose of single-agent IMC-I109V 20.0 mcg on Visit Day 1.

    Primary: Incidence of dose-limiting toxicities

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    End point title
    Incidence of dose-limiting toxicities [1]
    End point description
    A dose-limiting toxicity (DLT) is defined as an AE that is assessed as having a suspected relationship to IMC-I109V, occurs within the defined observation period up to and including Day 8, is unrelated to the underlying disease, intercurrent illness, or concomitant medication, and meets prespecified DLT criteria.
    End point type
    Primary
    End point timeframe
    Up to and Including Day 8
    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: There are no statistical analyses for descriptive data.
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    4
    2
    6
    8
    Units: Participants
        Dose-limiting toxicity
    0
    0
    0
    0
    No statistical analyses for this end point

    Primary: Incidence and severity of treatment-emergent adverse events (TEAEs)

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    End point title
    Incidence and severity of treatment-emergent adverse events (TEAEs) [2]
    End point description
    A treatment-emergent adverse event (TEAE) is defined as an adverse event (AE) that had an onset date, or a worsening in severity from baseline (pre-treatment), on or after the first dose of study drug and up to the 28 days after the last dose of IMC-I109V. Grading of cytokine release syndrome (CRS) is based on the American Society for Transplantation and Cellular Therapy (ASTCT) 2019 consensus grading system. AE severity is graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) version 5.0.
    End point type
    Primary
    End point timeframe
    On or after the first dose of study drug and up to the 28 days after the last dose of study IMC-I109V
    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: There are no statistical analyses for descriptive data.
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    4
    2
    6
    8
    Units: Participants
        Any treatment-emergent adverse event (TEAE)
    1
    0
    2
    4
        Any TEAE Grade ≥3
    0
    0
    1
    1
        Any serious adverse event (SAE)
    0
    0
    0
    1
        Any TEAE leading to death
    0
    0
    0
    0
        Any AE leading to treatment discontinuation
    0
    0
    0
    0
    No statistical analyses for this end point

    Primary: Changes in safety parameters

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    End point title
    Changes in safety parameters [3]
    End point description
    Clinically significant abnormal laboratory findings are those which are not associated with the underlying disease, unless judged by the Investigator to be more severe than expected for the participant's condition. Other safety variables and evaluations include vital signs and electrocardiogram findings.
    End point type
    Primary
    End point timeframe
    On or after the first dose of study drug and up to the 28 days after the last dose of study IMC-I109
    Notes
    [3] - 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: There are no statistical analyses for descriptive data.
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    4
    2
    6
    8
    Units: Participants
        Clinically significant safety laboratory changes
    0
    0
    2
    3
        Clinically significant vital sign changes
    0
    0
    0
    1
        Clinically significant electrocardiogram changes
    0
    0
    0
    0
    No statistical analyses for this end point

    Secondary: Incidence of anti-IMCI109V antibody formation

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    End point title
    Incidence of anti-IMCI109V antibody formation
    End point description
    Overall anti-drug antibody (ADA) incidence equaled subjects with a treatment-induced or treatment-boosted ADA response or with positive post-baseline ADA result but no baseline ADA sample divided by the number of evaluable subjects. Evaluable subjects were subjects with ADA results after first dose.
    End point type
    Secondary
    End point timeframe
    Following administration of 1 dose of study drug, with sample collections occurring pre-dose and 4 weeks post dose
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    4
    2 [4]
    6
    8 [5]
    Units: Participants
    0
    0
    1
    0
    Notes
    [4] - 1 participant had a positive ADA result at baseline, that did not increase on trial.
    [5] - 3 participants had a positive ADA result at baseline, that did not increase on trial.
    No statistical analyses for this end point

    Secondary: Hepatitis B surface antigen (HBsAg) change from baseline

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    End point title
    Hepatitis B surface antigen (HBsAg) change from baseline
    End point description
    End point type
    Secondary
    End point timeframe
    From Baseline through end of trial
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    4
    2
    6
    8
    Units: IU/mL
    log mean (standard deviation)
        Week 1 Day 3 - Log Change from Baseline
    -0.028 ( 0.0333 )
    -0.034 ( 0.0367 )
    -0.074 ( 0.1406 )
    -0.209 ( 0.3436 )
        Week 2 Day 1 - Log Change from Baseline
    -0.000 ( 0.0487 )
    -0.043 ( 0.0005 )
    -0.051 ( 0.1589 )
    -0.121 ( 0.2633 )
        Week 3 Day 1 - Log Change from Baseline
    0.001 ( 0.0399 )
    -0.068 ( 0.0529 )
    -0.051 ( 0.1298 )
    -0.102 ( 0.2435 )
        Week 4 Day 1 - Log Change from Baseline
    0.024 ( 0.0484 )
    -0.073 ( 0.0765 )
    0.005 ( 0.1458 )
    -0.106 ( 0.2419 )
        Week 5 Day 1 - Log Change from Baseline
    0.013 ( 0.0314 )
    -0.054 ( 0.0578 )
    -0.056 ( 0.1232 )
    -0.109 ( 0.2068 )
    No statistical analyses for this end point

    Secondary: Hepatitis B core-related antigen (HBcrAg) change from baseline

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    End point title
    Hepatitis B core-related antigen (HBcrAg) change from baseline
    End point description
    End point type
    Secondary
    End point timeframe
    From Baseline through end of trial
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    3
    2
    3
    4
    Units: IU/mL
    log mean (standard deviation)
        Week 1 Day 3 - Log Change from Baseline
    -0.008 ( 0.0073 )
    -0.005 ( 0.0074 )
    -0.003 ( 0.0139 )
    -0.018 ( 0.0154 )
        Week 2 Day 1 - Log Change from Baseline
    -0.013 ( 0.0010 )
    -0.004 ( 0.0247 )
    -0.005 ( 0.0203 )
    -0.014 ( 0.0210 )
        Week 3 Day 1 - Log Change from Baseline
    -0.004 ( 0.0073 )
    -0.005 ( 0.0074 )
    0.004 ( 0.0194 )
    -0.017 ( 0.0155 )
        Week 4 Day 1 - Log Change from Baseline
    -0.004 ( 0.0073 )
    -0.018 ( 0.0049 )
    0.007 ( 0.0065 )
    -0.006 ( 0.0215 )
        Week 5 Day 1 - Log Change from Baseline
    -0.008 ( 0.0073 )
    -0.012 ( 0.0027 )
    0.004 ( 0.0194 )
    -0.006 ( 0.0215 )
    No statistical analyses for this end point

    Secondary: HBV RNA change from baseline

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    End point title
    HBV RNA change from baseline
    End point description
    End point type
    Secondary
    End point timeframe
    From Baseline through end of trial
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    0 [6]
    1 [7]
    2 [8]
    0 [9]
    Units: IU/mL
    log mean (standard deviation)
        Week 1 Day 3 - Log Change from Baseline
    ( )
    -0.013 ( 0 )
    0.007 ( 0.0275 )
    ( )
        Week 2 Day 1 - Log Change from Baseline
    ( )
    0.000 ( 0 )
    0.006 ( 0.0307 )
    ( )
        Week 3 Day 1 - Log Change from Baseline
    ( )
    0.008 ( 0 )
    0.011 ( 0.0095 )
    ( )
        Week 4 Day 1 - Log Change from Baseline (n=1, n=1)
    ( )
    0.018 ( 0 )
    0.000 ( 0 )
    ( )
        Week 5 Day 1 - Log Change from Baseline (n=1, n=0)
    ( )
    -0.035 ( 0 )
    0 ( 0 )
    ( )
    Notes
    [6] - All values for participants in this arm were below the limit of detection.
    [7] - Note: "0" was used when a value was not available or when standard deviation was not calculable.
    [8] - Note: "0" was used when a value was not available or when standard deviation was not calculable.
    [9] - All values for participants in this arm were below the limit of detection.
    No statistical analyses for this end point

    Secondary: Maximum plasma concentration (Cmax) for IMC-I109V

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    End point title
    Maximum plasma concentration (Cmax) for IMC-I109V
    End point description
    End point type
    Secondary
    End point timeframe
    Pre-dose, end of infusion (EOI), 2 hours post-EOI, 4 hours post-EOI, 8 hours post-EOI, 12 hours post-EOI, 24 hours post-EOI, 48 hours post-EOI, and 72 hours post-EOI
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    4
    2
    6
    8
    Units: pg/mL
        arithmetic mean (full range (min-max))
    133 (102 to 136)
    694 (610 to 778)
    1400 (1060 to 1930)
    3380 (2020 to 5060)
    No statistical analyses for this end point

    Secondary: Half-life (t1/2) for IMC-I109V

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    End point title
    Half-life (t1/2) for IMC-I109V
    End point description
    End point type
    Secondary
    End point timeframe
    Pre-dose, end of infusion (EOI), 2 hours post-EOI, 4 hours post-EOI, 8 hours post-EOI, 12 hours post-EOI, 24 hours post-EOI, 48 hours post-EOI, and 72 hours post-EOI
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    0 [10]
    2
    6
    8
    Units: Hours
        arithmetic mean (full range (min-max))
    ( to )
    9.40 (9.28 to 9.52)
    11.0 (9.43 to 13.2)
    14.0 (9.21 to 20.7)
    Notes
    [10] - Due to insufficient data in the elimination phase after dosing, t1/2 could not be estimated.
    No statistical analyses for this end point

    Secondary: Area under the concentration curve from time zero to the last measurable concentration sampling time (AUClast) for IMC-I109V

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    End point title
    Area under the concentration curve from time zero to the last measurable concentration sampling time (AUClast) for IMC-I109V
    End point description
    End point type
    Secondary
    End point timeframe
    Pre-dose, end of infusion (EOI), 2 hours post-EOI, 4 hours post-EOI, 8 hours post-EOI, 12 hours post-EOI, 24 hours post-EOI, 48 hours post-EOI, and 72 hours post-EOI
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    4
    2
    6
    8
    Units: h*pg/mL
        arithmetic mean (full range (min-max))
    455 (115 to 720)
    7100 (6280 to 7910)
    15500 (12700 to 23900)
    40500 (29900 to 55900)
    No statistical analyses for this end point

    Secondary: Total body clearance of drug from the plasma (CL) for IMC-I109V

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    End point title
    Total body clearance of drug from the plasma (CL) for IMC-I109V
    End point description
    End point type
    Secondary
    End point timeframe
    Pre-dose, end of infusion (EOI), 2 hours post-EOI, 4 hours post-EOI, 8 hours post-EOI, 12 hours post-EOI, 24 hours post-EOI, 48 hours post-EOI, and 72 hours post-EOI
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    0 [11]
    2
    6
    8
    Units: L/h
        arithmetic mean (full range (min-max))
    ( to )
    0.280 (0.246 to 0.314)
    0.362 (0.237 to 0.452)
    0.437 (0.293 to 0.578)
    Notes
    [11] - Due to insufficient data in the elimination phase after dosing, CL could not be estimated.
    No statistical analyses for this end point

    Secondary: Area under the concentration curve from time zero to infinity (AUCinf) for IMC-I109V

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    End point title
    Area under the concentration curve from time zero to infinity (AUCinf) for IMC-I109V
    End point description
    End point type
    Secondary
    End point timeframe
    Pre-dose, end of infusion (EOI), 2 hours post-EOI, 4 hours post-EOI, 8 hours post-EOI, 12 hours post-EOI, 24 hours post-EOI, 48 hours post-EOI, and 72 hours post-EOI
    End point values
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Number of subjects analysed
    0 [12]
    2
    6
    8
    Units: h*pg/mL
        arithmetic mean (full range (min-max))
    ( to )
    8700 (7630 to 9770)
    20200 (15500 to 29500)
    47900 (34600 to 68200)
    Notes
    [12] - Due to insufficient data in the elimination phase after dosing, AUCinf could not be estimated.
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    On or after the first dose of study drug and up to the 28 days after the last dose of study IMC-I109
    Adverse event reporting additional description
    The safety analysis set consists of all participants who receive at least one dose of investigational product, IMC-I109V.
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    26.0
    Reporting groups
    Reporting group title
    Part 1: IMC-I109V 0.8 mcg
    Reporting group description
    Participants received 1 dose of single-agent IMC-I109V 0.8 mcg on Visit Day 1

    Reporting group title
    Part 1: IMC-I109V 2.4 mcg
    Reporting group description
    Participants received 1 dose of single-agent IMC-I109V 2.4 mcg on Visit Day 1.

    Reporting group title
    Part 1: IMC-I109V 7.0 mcg
    Reporting group description
    Participants received 1 dose of single-agent IMC-I109V 7.0 mcg on Visit Day 1.

    Reporting group title
    Part 1: IMC-I109V 20.0 mcg
    Reporting group description
    Participants received 1 dose of single-agent IMC-I109V 20.0 mcg on Visit Day 1.

    Serious adverse events
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Total subjects affected by serious adverse events
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    1 / 8 (12.50%)
         number of deaths (all causes)
    0
    0
    0
    0
         number of deaths resulting from adverse events
    0
    0
    0
    0
    Vascular disorders
    Shock
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    1 / 8 (12.50%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    1 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    Part 1: IMC-I109V 0.8 mcg Part 1: IMC-I109V 2.4 mcg Part 1: IMC-I109V 7.0 mcg Part 1: IMC-I109V 20.0 mcg
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    1 / 4 (25.00%)
    0 / 2 (0.00%)
    2 / 6 (33.33%)
    4 / 8 (50.00%)
    Investigations
    Alanine aminotransferase increased
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    1 / 6 (16.67%)
    2 / 8 (25.00%)
         occurrences all number
    0
    0
    1
    2
    Aspartate aminotransferase increased
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    1 / 6 (16.67%)
    1 / 8 (12.50%)
         occurrences all number
    0
    0
    1
    1
    Amylase increased
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    1 / 6 (16.67%)
    0 / 8 (0.00%)
         occurrences all number
    0
    0
    1
    0
    Lymphocyte count decreased
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    1 / 8 (12.50%)
         occurrences all number
    0
    0
    0
    2
    Cardiac disorders
    Ventricular extrasystoles
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    1 / 8 (12.50%)
         occurrences all number
    0
    0
    0
    1
    General disorders and administration site conditions
    Chills
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    1 / 6 (16.67%)
    2 / 8 (25.00%)
         occurrences all number
    0
    0
    1
    2
    Pyrexia
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    1 / 6 (16.67%)
    1 / 8 (12.50%)
         occurrences all number
    0
    0
    1
    1
    Injection site reaction
         subjects affected / exposed
    1 / 4 (25.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    0 / 8 (0.00%)
         occurrences all number
    1
    0
    0
    0
    Malaise
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    1 / 8 (12.50%)
         occurrences all number
    0
    0
    0
    1
    Pain
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    1 / 6 (16.67%)
    0 / 8 (0.00%)
         occurrences all number
    0
    0
    1
    0
    Gastrointestinal disorders
    Nausea
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    1 / 8 (12.50%)
         occurrences all number
    0
    0
    0
    1
    Respiratory, thoracic and mediastinal disorders
    Hypoxia
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    1 / 8 (12.50%)
         occurrences all number
    0
    0
    0
    1
    Skin and subcutaneous tissue disorders
    Rash pruritic
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    1 / 6 (16.67%)
    0 / 8 (0.00%)
         occurrences all number
    0
    0
    1
    0
    Renal and urinary disorders
    Oliguria
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    1 / 8 (12.50%)
         occurrences all number
    0
    0
    0
    1
    Musculoskeletal and connective tissue disorders
    Myalgia
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    2 / 8 (25.00%)
         occurrences all number
    0
    0
    0
    2
    Metabolism and nutrition disorders
    Hypoglycaemia
         subjects affected / exposed
    0 / 4 (0.00%)
    0 / 2 (0.00%)
    0 / 6 (0.00%)
    1 / 8 (12.50%)
         occurrences all number
    0
    0
    0
    1

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    06 May 2020
    Version 2.0 includes revisions in response to Medicines and Healthcare products Regulatory Agency (MHRA) and Investigator feedback, as well as administrative changes. Main changes to Version 2.0: - Indicated that the proposed 28-day follow-up period for Part 1 – SAD will serve to fully characterize the HBV biomarker kinetics and to confirm that all laboratory abnormalities have resolved - Indicated that the proposed 24-week follow up period for Part 2 – MAD will serve to evaluate criteria for HBV functional cure, fully characterize the HBV biomarker kinetics, assess durability of response, and continue to monitor safety signals - Added a new section for infusion duration justification and clarified that based on the anticipated pharmacokinetic (PK) profile of IMC-I109V, there is no significant impact on Cmax for a variety of infusion durations within the range permitted by dosing formulation stability. - Revised duration of contraception (from 6 to 3 months) and prohibited egg donation - Provided guidance regarding the use of live and non-live vaccines before and after administration of IMC-I109V administration - Specified the all participants receiving the lead-in doses and the first target dose of IMC-I109V in Part 2 – MAD should be observed for 24 hours from the end of infusion. - Clarified that 2 additional cohorts may be enrolled in Part 1 at higher (rather than intermediate) doses after Cohort 5: 120 mcg (2-fold from 60 mcg) and 180 mcg (0.5-fold from 120 mcg). - Clarified that study participants in Part 1 – SAD may be considered for inclusion in Part 2 – MAD (number of participants from Part 1 participating in any given Part 2 cohort would be limited to 30%) and expansion cohort in Part 2 if they meet all of the retreatment criteria
    03 Mar 2021
    Version 3.0 includes revisions in response to changes requested by MHRA Health Authorities and administrative changes. Main changes in Version 3.0: - Added ibuprofen as a possible non-steroidal anti-inflammatory agent for premedication - Added HBeAg assessment at screening - Updated the schedule of activities to ensure that vital signs are collected during the 2-hour infusion in the Part 1 - SAD and the first 3 doses in Part 2 - MAD - Provided clarification on the justification of the proposed maximum dose of 180 mcg for Part 1 - SAD - Changed the maximum age for inclusion from 55 to 65 years - Allowed patients with HCC Stage 0 to participate in the study - Clarified that participants must receive entecavir and/or tenofovir (including tenofovir alafenamide) as indicated by the Principal Investigator during their participation in the study - Added additional non-mandatory premedication - Clarified the rules during dose escalation in Part 1 - SAD and lead-in doses in Part 2 - MAD - Added reasons for early study termination
    09 May 2022
    Version 4.0 includes revisions to reduce participant burden and address slow accrual of study participants. Main changes in Version 4.0: - Removed the Week 1 Day 5 visit - Corrected the number and timing of vital signs and samples to be taken for PK, peripheral blood mononuclear cells (PBMC), whole blood messenger RNA (mRNA) and plasma - Amended SAD cohort size to 2-4 participants - Amended Inclusion/Exclusion Criteria regarding quantitative HBsAg (qHBsAg) and thresholds for alanine aminotransferase (ALT) and platelet counts - Amended clinically active dose definition with respect to ALT change post-dosing and futility criteria for consistency with change to clinically active dose definition - Updated ALT criteria for dose modification
    03 Apr 2023
    Version 5.0 includes Part 3 - MAD in participants with HBV-associated HCC who are virally suppressed. In addition to the inclusion of Part 3, revisions to Version 5.0: - Added HBV Genotyping to enable determination of benefit / risk for any patient identified as having genotypes other than B, C, D or E - Changed pregnancy test changed from serum to urine - Added severe acute respiratory coronavirus 2 (SAR-COV-2) antigen testing pre-dose - Changed PK sample 48 hours post EOI to optional sample on Day 3 - Removed serum sample collection 4 hours post EOI - Updated summary data of patients dosed with Immune-mobilizing monoclonal T-cell receptor against virus (ImmTAC) molecules - Added option for additional cohorts evaluating dosing less frequently than every week - Clarified contraindications to intra-patient dose escalation - Allowed people with treated HIV to be considered for enrollment - Allowed people in observational studies to be permitted with approval of the Medical Monitor - Updated criteria for steroid premedication; changed preferred corticosteroid from intravenous (IV) methylprednisolone to oral prednisolone and reduction in recommended dose of corticosteroid - Provided for overnight monitoring to be discontinued for any dose that has been deemed to be safe and tolerable in ≥ 10 patients - Reduced infusion time to 1 hour - Changed preferred corticosteroid for premedication from dexamethasone to prednisolone and use of mandatory corticosteroid premedication for any participants not receiving extended monitoring - Modified definition of Grade 3 events that will be considered a DLT - Removed cap on proportion of participants in Part 2 who have also participated in Part 1 - Added provision for unscheduled visits to collect additional blood samples if needed

    Interruptions (globally)

    Were there any global interruptions to the trial? Yes
    Date
    Interruption
    Restart date
    23 Dec 2024
    Following portfolio review, the study was terminated early (prior to treating subjects in Part 2) by the Sponsor as a strategic decision (not based on any safety signal).
    -

    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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