A Study of TAK-411 in Adults With Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP)

Phase 2

Recruiting

• Conditions: Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP)
• Interventions: Biological: TAK-411

• Registration Number: NCT06798012
• Lead Sponsor: Takeda

Brief Summary

CIDP is an autoimmune disease. This means that the body's germ fighting (immune) system attacks itself. In CIDP, the immune system attacks the protective covering around the nerves called myelin. Over time, these nerves lose their ability to send signals to the muscles in the body. This leads to muscle weakness and loss of sensation in arms and legs among other symptoms. Participants with CIDP can be treated with a protein called immunoglobulin (or IG).

TAK-411 is a special type of immune globulin G (hsIgG) that has been chemically changed. It is made from IG that comes from human plasma. This study will test if TAK-411 can decrease inflammation and improve symptoms of CIDP.

The main aim of this study is to check how TAK-411 affects the physical functioning of adults with CIDP when compared with results of the placebo group of a historical trial.

Participants may be treated with TAK-411 for up to 1 year (51 weeks) and will be followed up for 3 weeks after last dose.

During the study, participants may visit their study clinic up to approximately 21 times.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2025-01-23
• Study First Submitted QC: 2025-01-23
• Study First Posted: 2025-01-29
• Status Verified: 2025-05
• Study Start: 2025-05-14
• Last Update Submitted: 2025-05-15
• Last Update Posted: 2025-05-20
• Primary Completion: 2027-12-02
• Study Completion: 2028-06-08

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 36

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
TAK-411	TAK-411	Participants will receive TAK-411 400 milligrams per kilogram (mg/kg), IV infusion as an induction dose on Day 1 of initial treatment period. The induction dose may be repeated once after 3 weeks if participants exhibit no clinical change. Thereafter, participants will receive TAK-411 200 mg/kg, IV infusion every 3 weeks for a total of 24 weeks (initial treatment period), followed by an optional additional 27 weeks (extended treatment period).

Primary Outcome Measures

Name	Time	Method
Number of Participants With Improvement in Functional Ability at Week 24	At Week 24	Improvement in functional ability is defined as decrease of \>=1 point in INCAT score at Week 24 compared with baseline (last assessment before first investigational product \[IP\] administration on Day 1). INCAT disability scale consists of upper and lower extremity components, which are scored based on a participant's level of impairment/disability in their arms and legs, respectively. Each component is scored from 0 to 5 points, which are summed for an overall INCAT disability score ranging from 0 to 10 points, where a score of 0 indicates no signs of disability (example, no upper limb problems and walking not affected) and a score of 10 indicates most severe disability (example, inability to move either arm for any purposeful movement and restricted to a wheelchair, unable to stand and walk a few steps with help). Adjusted INCAT disability score remains identical to INCAT disability score, except that changes in upper limb function from 0 (normal) to 1 (minor symptoms) are excluded.

Secondary Outcome Measures

Name	Time	Method
Number of Participants With Improvement in Functional Ability at Weeks 12 and 54	At 12 and 54 weeks	Improvement in functional ability is defined as decrease of \>=1 point in the adjusted INCAT score at 12 and 54 weeks compared with baseline (last assessment before first IP administration on Day 1). INCAT disability scale consists of upper and lower extremity components, which are scored based on a participant's level of impairment/disability in their arms and legs, respectively. Each component is scored from 0 to 5 points, which are summed for an overall INCAT disability score ranging from 0 to 10 points, where a score of 0 indicates no signs of disability (example, no upper limb problems and walking not affected) and a score of 10 indicates most severe disability (example, inability to move either arm for any purposeful movement and restricted to a wheelchair, unable to stand and walk a few steps with help). Adjusted INCAT disability score remains identical to INCAT disability score, except that changes in upper limb function from 0 (normal) to 1 (minor symptoms) are excluded.
Number of Participants With Infusion Discontinuations, Interruptions, and Infusion Rate Reductions due to TAK-411 Related TEAEs	From start of study drug administration up to 54 weeks
Number of Participants With Antibodies Against Host Cell Proteins (HCP), Beta-1,4-galactosyltransferase (B4GalT1) and Alpha-2,6-sialyltransferase (St6Gal1)	Up to 54 weeks
Change From Baseline in Adjusted Inflammatory Neuropathy Cause and Treatment (INCAT) Score	Baseline (last assessment prior first dose on Day 1), at 12, 24 and 54 weeks	INCAT disability scale consists of upper and lower extremity components, which are scored based on a participant's level of impairment/disability in their arms and legs, respectively. Each component is scored from 0 to 5 points, which are summed for an overall INCAT disability score ranging from 0 to 10 points, where a score of 0 indicates no signs of disability (example, no upper limb problems and walking not affected) and a score of 10 indicates most severe disability (example, inability to move either arm for any purposeful movement and restricted to a wheelchair, unable to stand and walk a few steps with help). Adjusted INCAT disability score remains identical to INCAT disability score, except that changes in upper limb function from 0 (normal) to 1 (minor symptoms) are excluded.
Change From Screening in the Adjusted INCAT Score	Screening, at 12, 24 and 54 weeks	INCAT disability scale consists of upper and lower extremity components, which are scored based on a participant's level of impairment/disability in their arms and legs, respectively. Each component is scored from 0 to 5 points, which are summed for an overall INCAT disability score ranging from 0 to 10 points, where a score of 0 indicates no signs of disability (example, no upper limb problems and walking not affected) and a score of 10 indicates most severe disability (example, inability to move either arm for any purposeful movement and restricted to a wheelchair, unable to stand and walk a few steps with help). Adjusted INCAT disability score remains identical to INCAT disability score, except that changes in upper limb function from 0 (normal) to 1 (minor symptoms) are excluded.
Number of Participants With Improvement in Functional Ability on Inflammatory Rasch-built Overall Disability Scale (I-RODS) Score	At 12, 24 and 54 weeks	Improvement in functional ability defined as increase of greater than or equal to (\>=) 4 points in the raw summed I-RODS score at 12, 24, and 54 weeks compared with baseline. I-RODS is a validated, participants-reported, linearly weighted overall disability scale that was specifically designed to capture current activity and social participation limitations in participants with immune-mediated peripheral neuropathies including CIDP. I-RODS comprises 24 items for which participants are asked to rate their functioning related to a variety of everyday tasks at the moment of completion. The participant assigns a score between 0 and 2 to each item as follows:0 (impossible to perform),1 (performed with difficulty), 2 (easily performed) with a lower score indicating more severe activity and social participation limitations. A total I-RODS score of 0 (complete disability) to 48 (no disability) is tabulated by totalling the 24-item responses where higher score represents better outcomes.
Change From Baseline in I-RODS Score	Baseline (last assessment prior first dose on Day 1), at 12, 24 and 54 weeks	The I-RODS is a validated, participants-reported, linearly weighted overall disability scale that was specifically designed to capture current activity and social participation limitations in participants with immune-mediated peripheral neuropathies including CIDP. The I-RODS comprises 24 items for which participants are asked to rate their functioning related to a variety of everyday tasks at the moment of completion. The participant assigns a score between 0 and 2 to each item as follows: 0 (impossible to perform), 1 (performed with difficulty), 2 (easily performed) with a lower score indicating more severe activity and social participation limitations. A total I-RODS score of 0 (complete disability) to 48 (no disability) is tabulated by totalling the 24-item responses where higher score represents better outcomes.
Change From Screening in I-RODS Score	Screening, at 12, 24 and 54 weeks	The I-RODS is a validated, participants-reported, linearly weighted overall disability scale that was specifically designed to capture current activity and social participation limitations in participants with immune-mediated peripheral neuropathies including CIDP. The I-RODS comprises 24 items for which participants are asked to rate their functioning related to a variety of everyday tasks at the moment of completion. The participant assigns a score between 0 and 2 to each item as follows: 0 (impossible to perform), 1 (performed with difficulty), 2 (easily performed) with a lower score indicating more severe activity and social participation limitations. A total I-RODS score of 0 (complete disability) to 48 (no disability) is tabulated by totalling the 24-item responses where higher score represents better outcomes.
Change From Baseline in Medical Research Council Sum Score (MRC-SS)	Baseline (last assessment prior first dose on Day 1), at 12, 24 and 54 weeks	The MRC-SS is used clinician-reported measure of muscle strength. Assessments are conducted bilaterally on six muscle groups: upper arm abductors, elbow flexors, wrist extensors, hip flexors, knee extensors, and foot dorsal flexors. Each muscle is rated from 0 to 5, where 0 indicates no visible contraction and 5 indicates normal strength. The scores are summed to obtain the MRC-SS, which ranges from 0 (quadriplegic) to 60 (normal strength).
Change From Screening in MRC-SS	Screening, at 12, 24 and 54 weeks	The MRC-SS is used clinician-reported measure of muscle strength. Assessments are conducted bilaterally on six muscle groups: upper arm abductors, elbow flexors, wrist extensors, hip flexors, knee extensors, and foot dorsal flexors. Each muscle is rated from 0 to 5, where 0 indicates no visible contraction and 5 indicates normal strength. The scores are summed to obtain the MRC-SS, which ranges from 0 (quadriplegic) to 60 (normal strength).
Change From Baseline in Bilateral Hand Grip Strength	Baseline (last assessment prior first dose on Day 1), at 12, 24 and 54 weeks	Bilateral hand grip strength assessments will be performed by prescribing physicians or qualified designees using the Martin Vigorimeter, measuring strength in kilopascals (kPa) ranging from 0 to 160 kPa.
Change From Screening in Bilateral Grip Strength	Screening, at 12, 24 and 54 weeks	Bilateral hand grip strength assessments will be performed by prescribing physicians or qualified designees using the Martin Vigorimeter, measuring strength in kPa ranging from 0 to 160 kPa.
Number of Participants With Treatment-Emergent Adverse Events (TEAEs)	From start of study drug administration up to 54 weeks

Trial Locations

Locations (1)

Perelman Center for Advanced Medicine, University of Pennsylvania; 🇺🇸 Philadelphia, Pennsylvania, United States