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A Study to Evaluate the Efficacy and Safety of ABC008 for Inclusion Body Myositis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT05721573
Recruitment Status : Recruiting
First Posted : February 10, 2023
Last Update Posted : January 9, 2024
Sponsor:
Collaborator:
Syneos Health
Information provided by (Responsible Party):
Abcuro, Inc.

Brief Summary:
A Phase II/III Randomized, Double-blind, Placebo-controlled, Multicenter Study to Determine the Efficacy and Safety of ABC008 in the Treatment of Subjects with Inclusion Body Myositis

Condition or disease Intervention/treatment Phase
Inclusion Body Myositis Drug: ABC008 Phase 2 Phase 3

Detailed Description:

A Phase II/III Randomized, Double-blind, Placebo-controlled, Multicenter Study to Determine the Efficacy and Safety of ABC008 in the Treatment of Subjects with Inclusion Body Myositis Detailed Description: A Phase II/III Randomized, Double-blind, Placebo-controlled, Multicenter Study to Determine the Efficacy and Safety of ABC008 in the Treatment of Subjects with Inclusion Body Myositis Detailed Description: This is a Phase II/III randomized, double-blind, placebo-controlled, parallel multicenter study with 3 parts.

The study will include a sentinel cohort (Part A) of 30 subjects who will receive first three doses of the study drug. Safety data from subjects in the sentinel cohorts will be evaluated by a Data and Safety Monitoring Board (DSMB) before further dosing of the sentinel cohort, as well as initiation of enrollment in the double-blind safety and efficacy cohort (Part B). After completion of Part A or Part B, subjects have the option of enrolling in an open-label long-term extension study or progressing to the pharmacodynamics (PD) recovery cohort (Part C), to evaluate the recovery of the depletion of killer cell lectin-like receptor G1 (KLRG1)+ cells after the end of treatment with ABC008.

Efficacy, safety, HRQoL, and HRU assessments will be conducted. Blood samples will be obtained to evaluate the serum PK, PD, and immunogenicity of ABC008 throughout the study.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 231 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Masking Description: Double Blind
Primary Purpose: Treatment
Official Title: A Phase II/III Randomized, Double-blind, Placebo-controlled, Multicenter Study to Evaluate the Efficacy and Safety of ABC008 in the Treatment of Subjects With Inclusion Body Myositis
Actual Study Start Date : February 28, 2023
Estimated Primary Completion Date : November 2025
Estimated Study Completion Date : December 2025


Arm Intervention/treatment
Active Comparator: 0.5 mg/kg ABC008

Part A - ABC008 N=12

Part B - ABC008 N= 67

Drug: ABC008
Given by subcutaneous injection

Active Comparator: 2.0 mg/kg ABC008

Part A - ABC008 N=12

Part B - ABC008 N= 67

Drug: ABC008
Given by subcutaneous injection

Placebo Comparator: Placebo

Part A - Placebo N= 6

Part B - Placebo N= 67

Drug: ABC008
Given by subcutaneous injection




Primary Outcome Measures :
  1. Part A - To determine the safety and tolerability of recurrent dosing of ABC008 in subjects with IBM at 2 SC dose levels. [ Time Frame: From Baseline (week 0) through week 20. ]
    Safety as assessed by the incidence, type and severity of Treatment Emergent Adverse Events (TEAEs)

  2. Part B - To determine the efficacy of ABC008 in IBM at two SC dose levels as measured by IBM Functional Rating Scale (IBMFRS) at Week (W)76 [ Time Frame: From Baseline (week 0) through study completion, an average of 76 weeks ]
    Mean change in IBM Functional Rating Scale (IBMFRS)


Secondary Outcome Measures :
  1. Part A - Treatment Emergent Serious Adverse Events (TEASAEs) [ Time Frame: From Baseline (Day 1) through study completion, an average of 80 weeks. ]
    Incidence, type and severity of TEASAEs.

  2. Part A - Treatment Emergent Adverse Events (TEAEs) onset within 24 hours of Study Medication Administration. [ Time Frame: From Baseline (Day 1) through study completion, an average of 80 weeks. ]
    Incidence, type, and severity of TEAEs with onset within 24 hours from the start of any of study medication administration

  3. Part A - Treatment Emergent Adverse Events leading to study medication or study discontinuation. [ Time Frame: From Baseline (Day 1) through study completion, an average of 80 weeks. ]
    Incidence of TEAEs leading to study medication or study discontinuation

  4. Part A - Clinically significant changes in standard laboratory parameters, vital signs, and ECGs [ Time Frame: From Baseline (Day 1) through study completion, an average of 80 weeks. ]
    Incidence of clinically significant changes in standard laboratory parameters, vital signs, and ECGs

  5. Part A - Adverse Events of Special Interest (AESI) [ Time Frame: From Baseline (Day 1) through study completion, an average of 80 weeks. ]
    Incidence of AESIs.

  6. Part B - Manual Muscle Test 12 (MMT 12) [ Time Frame: From Baseline (Day 1) through study completion, an average of 76 weeks. ]
    Mean change in MMT 12

  7. Part B - Hand Grip Dynamometry [ Time Frame: From Baseline (Day 1) through study completion, an average of 76 weeks. ]
    Mean change in hand grip strength by dynamometry.

  8. Part B - Quadriceps Dynamometry [ Time Frame: From Baseline (Day 1) through study completion, an average of 76 weeks. ]
    Mean change in quadriceps strength by dynamometry.

  9. Part B - Modified Timed Up and Go (mTUG) [ Time Frame: From Baseline (Day 1) through study completion, an average of 76 weeks. ]
    Mean change in mTUG.



Information from the National Library of Medicine

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Ages Eligible for Study:   40 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Adult males and females age >40 years at the time of the first dose of study medication;
  • Weight >40 and <150 kg;
  • Diagnosis of either clinico-pathologically defined IBM, clinically defined IBM, or probable IBM according to the European Neuromuscular Centre (ENMC) IBM 2011 research diagnostic criteria (Rose et al., 2013). Documented histopathology results must be available prior to Baseline (Day 1) to confirm eligibility;
  • Able to arise from a chair (with armrests), with use of their arms but without support from another person or device (e.g., cane, walking stick), at Screening and Baseline (Day 1);
  • Able to walk 3 meters, turn around, walk back to the chair, and sit down, with or without assistive device. Once arisen from the chair, subject may use any walking device but cannot be supported by another person, furniture, or a wall;

Exclusion Criteria:

  • Any other form of myositis or myopathy other than IBM, e.g., metabolic or drug-induced myopathy, drug-induced myositis, anti-synthetase syndrome, polymyositis or dermatomyositis, cancer-associated myositis (myositis diagnosed within 3 years, either before or after), myositis in overlap with another autoimmune disease (e.g., systemic lupus, systemic sclerosis, rheumatoid arthritis), or muscular dystrophy;
  • Any condition, e.g., severe degenerative arthritis with limited range of motion, which precludes the ability to quantitate muscle strength or perform functional assessments (e.g., mTUG), in the Investigator's opinion;.
  • Presence of another autoimmune or autoinflammatory disease other than indication under study, e.g., rheumatoid arthritis, psoriatic arthritis, axial spondyloarthropathy, inflammatory bowel disease, systemic lupus erythematosus. Subjects with Sjogren's syndrome, T-cell large granular lymphocyte leukemia (T-LGLL), or well-controlled thyroid disease are permitted;

Information from the National Library of Medicine

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

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05721573


Contacts
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Contact: Armando Reyes 1 617 865 5079 IBM-201_clinicaltrial@abcuro.com

Locations
Show Show 39 study locations
Sponsors and Collaborators
Abcuro, Inc.
Syneos Health
Additional Information:
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Responsible Party: Abcuro, Inc.
ClinicalTrials.gov Identifier: NCT05721573    
Other Study ID Numbers: ABC008-IBM-201
First Posted: February 10, 2023    Key Record Dates
Last Update Posted: January 9, 2024
Last Verified: January 2024
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Abcuro, Inc.:
Muscular Diseases
Inflammatory Myopathy
Myositis
Neuromuscular Diseases
Nervous System Disease
Additional relevant MeSH terms:
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Myositis
Myositis, Inclusion Body
Muscular Diseases
Musculoskeletal Diseases
Neuromuscular Diseases
Nervous System Diseases