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    Clinical Trial Results:
    A randomized, double blind, placebo-controlled, Phase III trial to evaluate the efficacy and safety of intra-articular injections of RTX-GRT7039 in adult subjects with pain associated with osteoarthritis of the knee

    Summary
    EudraCT number
    2021-005029-26
    Trial protocol
    DE   FR   NL   CZ   IT   PL  
    Global end of trial date
    18 Nov 2024

    Results information
    Results version number
    v1(current)
    This version publication date
    03 Jul 2025
    First version publication date
    03 Jul 2025
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    KF7039-01
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT05248386
    WHO universal trial number (UTN)
    U1111-1268-7314
    Sponsors
    Sponsor organisation name
    Grünenthal GmbH
    Sponsor organisation address
    Zieglerstr. 6, Aachen, Germany, 52099
    Public contact
    Grünenthal Trial Information Desk, Grünenthal GmbH, Clinical-Trials@grunenthal.com
    Scientific contact
    Grünenthal Trial Information Desk, Grünenthal GmbH, Clinical-Trials@grunenthal.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
    18 Nov 2024
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    18 Nov 2024
    Global end of trial reached?
    Yes
    Global end of trial date
    18 Nov 2024
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    Demonstrate the analgesic efficacy of intra-articular RTX-GRT7039 compared with placebo.
    Protection of trial subjects
    The trial was conducted according to Good Clinical Practice guidelines, the ethical principles that have their origin in the Declaration of Helsinki, and the applicable local laws and regulations. The applicable regulatory authorities approved the trial as required by national regulations, and the trial activities were only started when approval from the relevant independent ethics committee was available.
    Background therapy
    -
    Evidence for comparator
    -
    Actual start date of recruitment
    26 Aug 2022
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    No
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    Canada: 35
    Country: Number of subjects enrolled
    Japan: 93
    Country: Number of subjects enrolled
    Mexico: 27
    Country: Number of subjects enrolled
    Netherlands: 1
    Country: Number of subjects enrolled
    Poland: 217
    Country: Number of subjects enrolled
    Czechia: 47
    Country: Number of subjects enrolled
    France: 15
    Country: Number of subjects enrolled
    Germany: 32
    Country: Number of subjects enrolled
    Italy: 2
    Worldwide total number of subjects
    469
    EEA total number of subjects
    314
    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)
    179
    From 65 to 84 years
    283
    85 years and over
    7

    Subject disposition

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    Recruitment
    Recruitment details
    This study was conducted in 9 countries (including Canada, Czech Republic, France, Germany, Italy, Japan, Mexico, Netherlands, and Poland) between 26 Aug 2022 (first-subject-in) and 18 Nov 2024 (last-subject-out).

    Pre-assignment
    Screening details
    A total of 902 subjects were screened in the study, of which 469 subjects were enrolled in the study (Randomized Set – all subjects who were randomized, based on treatment as randomized).

    Period 1
    Period 1 title
    Overall study (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Double blind
    Roles blinded
    Subject, Investigator, Monitor

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    RTX-GRT7039
    Arm description
    Intra-articular RTX-GRT7039 400 ng injections. Full Analysis Set: 234 RTX-GRT7039; Safety Analysis Set: 234 RTX-GRT7039.
    Arm type
    Experimental

    Investigational medicinal product name
    RTX-GRT7039
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Injection
    Dosage and administration details
    Fifteen minutes following intra-articular injection of 5 mL ropivacaine 0.5% as local anesthetic, 5 mL (400 ng) RTX-GRT7039 were injected into the joint of the index knee.

    Arm title
    Placebo
    Arm description
    Intra-articular injections of matching placebo. Full Analysis Set: 232 placebo; Safety Analysis Set: 232 placebo.
    Arm type
    Placebo

    Investigational medicinal product name
    Placebo
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Injection
    Dosage and administration details
    Fifteen minutes following intra articular injection of 5 mL ropivacaine 0.5% as local anesthetic, 5 mL of matching placebo were injected into the joint of the index knee.

    Number of subjects in period 1 [1]
    RTX-GRT7039 Placebo
    Started
    234
    232
    Completed
    202
    204
    Not completed
    32
    28
         technical problems
    -
    1
         Consent withdrawn by subject
    15
    10
         Physician decision
    -
    1
         Adverse event, non-fatal
    2
    4
         Not specified
    1
    -
         Lack of efficacy
    14
    12
    Notes
    [1] - The number of subjects reported to be in the baseline period are not the same as the worldwide number enrolled in the trial. It is expected that these numbers will be the same.
    Justification: Reporting groups (Full Analysis Set and Safety Analysis Set) corresponds to all subjects with an Investigational medicinal product (IMP) administration (including incomplete administrations), based on actual treatment received. In Placebo Arm, three (3) subjects were randomized but not exposed to IMP.

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Overall study (overall period)
    Reporting group description

    Reporting group values
    Overall study (overall period) Total
    Number of subjects
    466 466
    Age categorical
    Units: Subjects
        18 - 35
    0 0
        36 - 64
    178 178
        >=65
    288 288
    Age continuous
    Units: years
        median (full range (min-max))
    67.0 (41 to 94) -
    Gender categorical
    Units: Subjects
        Female
    337 337
        Male
    129 129

    End points

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    End points reporting groups
    Reporting group title
    RTX-GRT7039
    Reporting group description
    Intra-articular RTX-GRT7039 400 ng injections. Full Analysis Set: 234 RTX-GRT7039; Safety Analysis Set: 234 RTX-GRT7039.

    Reporting group title
    Placebo
    Reporting group description
    Intra-articular injections of matching placebo. Full Analysis Set: 232 placebo; Safety Analysis Set: 232 placebo.

    Primary: LS-mean (SE) change from baseline in WOMAC pain subscale score at Week 12

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    End point title
    LS-mean (SE) change from baseline in WOMAC pain subscale score at Week 12
    End point description
    Difference in mean change from baseline in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain subscale score at Week 12 in the index knee using an 11-point (0-10) numeric rating scale (NRS) between RTX-GRT7039 and placebo.
    End point type
    Primary
    End point timeframe
    At week 12
    End point values
    RTX-GRT7039 Placebo
    Number of subjects analysed
    234
    232
    Units: LS-mean (SE) change
        least squares mean (standard error)
    -2.959 ( 0.15 )
    -2.847 ( 0.15 )
    Statistical analysis title
    Mixed model repeated measures (MMRM) analysis
    Comparison groups
    Placebo v RTX-GRT7039
    Number of subjects included in analysis
    466
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    = 0.569
    Method
    MMRM
    Confidence interval

    Secondary: LS-mean (SE) change from baseline in WOMAC pain subscale score at Week 26

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    End point title
    LS-mean (SE) change from baseline in WOMAC pain subscale score at Week 26
    End point description
    Difference in mean change from baseline in WOMAC pain subscale score at Week 26 in the index knee using an 11-point (0-10) numeric rating scale (NRS) between RTX-GRT7039 and placebo.
    End point type
    Secondary
    End point timeframe
    At Week 26
    End point values
    RTX-GRT7039 Placebo
    Number of subjects analysed
    234
    232
    Units: LS-mean (SE) change
        least squares mean (standard error)
    -2.564 ( 0.15 )
    -2.597 ( 0.16 )
    No statistical analyses for this end point

    Secondary: LS-mean (SE) change from baseline in WOMAC pain subscale score at Week 52

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    End point title
    LS-mean (SE) change from baseline in WOMAC pain subscale score at Week 52
    End point description
    Difference in mean change from baseline in WOMAC pain subscale score at Week 52 in the index knee using an 11-point (0-10) numeric rating scale (NRS) between RTX-GRT7039 and placebo.
    End point type
    Secondary
    End point timeframe
    At week 52
    End point values
    RTX-GRT7039 Placebo
    Number of subjects analysed
    234
    232
    Units: LS-mean (SE) change
        least squares mean (standard error)
    -2.686 ( 0.18 )
    -2.823 ( 0.18 )
    No statistical analyses for this end point

    Secondary: LS-mean (SE) change from baseline in WOMAC physical function subscale score at Week 12

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    End point title
    LS-mean (SE) change from baseline in WOMAC physical function subscale score at Week 12
    End point description
    Difference in mean change from baseline in WOMAC physical function subscale score at Week 12 in the index knee using an 11-point (0-10) numeric rating scale (NRS) between RTX-GRT7039 and placebo.
    End point type
    Secondary
    End point timeframe
    At week 12
    End point values
    RTX-GRT7039 Placebo
    Number of subjects analysed
    234
    232
    Units: LS-mean (SE) change
        least squares mean (standard error)
    -2.802 ( 0.14 )
    -2.740 ( 0.14 )
    No statistical analyses for this end point

    Secondary: LS-mean (SE) change from baseline in WOMAC physical function subscale score at Week 26

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    End point title
    LS-mean (SE) change from baseline in WOMAC physical function subscale score at Week 26
    End point description
    Difference in mean change from baseline in WOMAC physical function subscale score at Week 26 in the index knee using an 11-point (0-10) numeric rating scale (NRS) between RTX-GRT7039 and placebo
    End point type
    Secondary
    End point timeframe
    At week 26
    End point values
    RTX-GRT7039 Placebo
    Number of subjects analysed
    234
    232
    Units: LS-mean (SE) change
        least squares mean (standard error)
    -2.503 ( 0.14 )
    -2.552 ( 0.15 )
    No statistical analyses for this end point

    Secondary: LS-mean (SE) change from baseline in WOMAC physical function subscale score at Week 52

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    End point title
    LS-mean (SE) change from baseline in WOMAC physical function subscale score at Week 52
    End point description
    Difference in mean change from baseline in WOMAC physical function subscale score at Week 52 in the index knee using an 11-point (0-10) numeric rating scale (NRS) between RTX-GRT7039 and placebo
    End point type
    Secondary
    End point timeframe
    At Week 52
    End point values
    RTX-GRT7039 Placebo
    Number of subjects analysed
    234
    232
    Units: LS-mean (SE) change
        least squares mean (standard error)
    -2.664 ( 0.16 )
    -2.728 ( 0.16 )
    No statistical analyses for this end point

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    Adverse events were documented from the time of enrollment (i.e., the time the informed consent form is signed) up to the time of the last protocol scheduled contact.
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    27.0
    Reporting groups
    Reporting group title
    RTX-GRT7039
    Reporting group description
    Intra-articular RTX-GRT7039 400 ng injections. Full Analysis Set: 234 RTX-GRT7039 Safety Analysis Set: 234 RTX-GRT7039

    Reporting group title
    Placebo
    Reporting group description
    Intra-articular injections of matching placebo. Full Analysis Set: 232 placebo; Safety Analysis Set: 232 placebo.

    Serious adverse events
    RTX-GRT7039 Placebo
    Total subjects affected by serious adverse events
         subjects affected / exposed
    17 / 234 (7.26%)
    14 / 232 (6.03%)
         number of deaths (all causes)
    0
    0
         number of deaths resulting from adverse events
    0
    0
    Neoplasms benign, malignant and unspecified (incl cysts and polyps)
    Breast cancer
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Gastric cancer
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Lymphoma
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         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
    Femoral neck fracture
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Fall
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         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 / 234 (0.00%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Joint dislocation
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Lumbar vertebral fracture
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Meniscus injury
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Patella fracture
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         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
    2 / 234 (0.85%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Cardiac disorders
    Atrial flutter
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Coronary artery disease
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Supraventricular tachycardia
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Nervous system disorders
    Altered state of consciousness
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Gastrointestinal disorders
    Large intestine polyp
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Varices oesophageal
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Reproductive system and breast disorders
    Vaginal prolapse
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         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
    Epistaxis
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Skin and subcutaneous tissue disorders
    Skin lesion
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (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
    Osteoarthritis
         subjects affected / exposed
    4 / 234 (1.71%)
    3 / 232 (1.29%)
         occurrences causally related to treatment / all
    0 / 4
    0 / 3
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Arthralgia
         subjects affected / exposed
    1 / 234 (0.43%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Spinal pain
         subjects affected / exposed
    2 / 234 (0.85%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Spondyloarthropathy
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (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
    Cellulitis
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Diverticulitis
         subjects affected / exposed
    1 / 234 (0.43%)
    0 / 232 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Intervertebral discitis
         subjects affected / exposed
    0 / 234 (0.00%)
    1 / 232 (0.43%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    RTX-GRT7039 Placebo
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    53 / 234 (22.65%)
    40 / 232 (17.24%)
    Injury, poisoning and procedural complications
    Procedural pain
         subjects affected / exposed
    31 / 234 (13.25%)
    9 / 232 (3.88%)
         occurrences all number
    40
    9
    Musculoskeletal and connective tissue disorders
    Arthralgia
         subjects affected / exposed
    13 / 234 (5.56%)
    20 / 232 (8.62%)
         occurrences all number
    18
    26
    Infections and infestations
    Nasopharyngitis
         subjects affected / exposed
    10 / 234 (4.27%)
    12 / 232 (5.17%)
         occurrences all number
    11
    14

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    27 Jul 2022
    This global amendment incorporates changes that have been implemented as requested by the health authorities during their review of the clinical trial application, including update IMP administration, exclusion criteria, concomitant treatments, imputation methods, storage conditions, documentation requirements, contraception definitions, and editorial adjustments.
    01 Dec 2022
    This amendment incorporates changes that have been implemented in order to enhance trial feasibility and recruitment, including correction and clarifications on safety endpoints, eligibility criteria, no re-injection in case of pregnancy, addition of re-screening procedures, addition of important medical events definition, and editorial updates.
    01 Feb 2023
    This amendment incorporates an update on the qualification of the person administering IMP

    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.
    The study failed to meet its primary endpoint and is not intended to contribute to the evaluation of product effectiveness.
    For support, Contact us.
    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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