A Phase 2/3 interventional study of Nipocalimab and Placebo in Polyradiculoneuropathy, Chronic Inflammatory Demyelinating, sponsored by Janssen Research & Development, LLC. Recruiting at 120 sites in 19 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-11-03.
Sponsored by Janssen Research & Development, LLC (part of Johnson & Johnson) · Phase 2/3, Interventional, and Treatment
The main purpose of this study is to evaluate the safety and efficacy of nipocalimab compared to placebo in delaying relapse in adults with chronic inflammatory demyelinating polyneuropathy (CIDP) who initially respond to nipocalimab in Stage A.
137 studies on the registry are indexed under Polyradiculoneuropathy, Chronic Inflammatory Demyelinating; 51 are open to participants now.
This study's planned enrollment of 201 is above the median of 37 across 85 interventional studies indexed under Polyradiculoneuropathy, Chronic Inflammatory Demyelinating.
Browse Polyradiculoneuropathy, Chronic Inflammatory Demyelinating studies →Janssen Research & Development, LLC is the lead sponsor of 932 studies on the registry; 76 are open to participants now.
Of its 285 completed or terminated interventional studies of FDA-regulated products, 136 (48%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Excipients
The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants in Stage A (Open-label) will receive a loading dose of nipocalimab (Dose 1) intravenous (IV) infusion on Day 1, followed by nipocalimab (Dose 2) IV infusion once every 2 weeks (q2w) from Week 2 to Week 12. Participants who demonstrate evidence of clinical improvement in Stage A (responders) will enter Stage B (Double-blind) and receive nipocalimab (Dose 2) IV infusion q2w starting on Day 1 up to Week 52. After completion of Stage B or discontinuation from Stage B due to relapse, participants will have the option to enter the open label extension (OLE) phase and receive nipocalimab (Dose 2) IV infusion q2w starting on OLE Day 1 until 2 years after marketing authorization in a participant's local country or until nipocalimab becomes available commercially or via other continued access program, whichever comes first.
Drug: Nipocalimab
Participants receiving nipocalimab in Stage A and who demonstrate evidence of clinical improvement in Stage A (responders) will enter Stage B (Double-blind) and receive placebo IV infusion q2w starting on Day 1 up to Week 52. After completion of Stage B or discontinuation from Stage B due to relapse, participants will have the option to enter the open label extension (OLE) phase and receive nipocalimab (Dose 2) IV infusion q2w starting on OLE Day 1 until 2 years after marketing authorization in a participant's local country or until nipocalimab becomes available commercially or via other continued access program, whichever comes first.
Drug: Placebo
Nipocalimab will be administered intravenously.
Also known as: JNJ-80202135, M281
Placebo will be administered intravenously.
Stage B: Time to First Occurrence of a Relapse Event
Stage B time to first occurrence of a relapse event will be reported.
Time frame: Up to 52 weeks
Stage A: Time to Initial Confirmed Evidence of Clinical Improvement (ECI)
Time to initial confirmed ECI will be reported.
Time frame: 12 weeks
Stage A: Percentage of Responders as Determined by ECI
Stage A percentage of responders as determined by ECI will be reported.
Time frame: 12 weeks
Stage A: Change from Baseline Over Time in Adjusted Inflammatory Neuropathy Cause and Treatment (INCAT) Disability Scale Score
Change from Stage A baseline over time in adjusted INCAT disability scale score will be reported. The INCAT disability scale is a clinician-rated assessment that measures activity limitation and degree of functional disability. The INCAT scale is an ordinal scale scored from 0 to 10, with higher scores indicating more disability.
Time frame: Baseline to 12 weeks
Stage A: Change from Stage A Baseline Over Time in Medical Research Council (MRC) Muscle Grading Scale Sum Score
Change from Stage A baseline over time in MRC muscle grading scale sum score will be reported. The MRC muscle grading scale is a clinician-rated outcome that provides a strength rating (on a scale from 0 \[no visible contraction\] to 5 \[normal\]) in 6 muscles collected bilaterally: deltoid, biceps, wrist extensors, iliopsoas, quadriceps, tibialis anterior. Lower scores indicate greater impairment.
Time frame: Baseline to 12 weeks
Stage A: Change from Baseline Over Time in Inflammatory Rasch-Built Overall Disability Scale (I-RODS) Centile Score
Change from Stage A baseline over time in I-RODS centile score will be reported. The I-RODS comprises of 24 items representing common daily activities that address upper and lower limb disability and range in difficulty from very easy to very difficult. Lower scores indicate greater activity and social participation limitations.
Time frame: Baseline to 12 weeks
Stage A: Change from Baseline Over Time in Mean Grip Strength (Dominant Hand)
Change from Stage A baseline over time in mean grip strength (dominant hand) will be reported. Grip Strength is a quantifiable, objective performance outcome measure of hand strength, which can be measured using various devices (for example, Martin Vigorimeter and Jamar Dynamometer).
Time frame: Baseline to 12 weeks
Stage A: Change from Baseline Over Time in Mean Grip Strength (Non-Dominant Hand)
Change from Stage A baseline over time in mean grip strength (non-dominant hand) will be reported. Grip Strength is a quantifiable, objective performance outcome measure of hand strength, which can be measured using various devices (for example, Martin Vigorimeter and Jamar Dynamometer).
Time frame: Baseline to 12 weeks
Stage B: Time to First Adjusted INCAT Disability Scale Score Deterioration Relative to Baseline
Time to first adjusted INCAT disability scale score deterioration relative to Stage B baseline will be reported.
Time frame: Up to 52 weeks
Stage B: Time to First Switch to Intravenous Immunoglobulin (IVIg) or Other Standard of Care (SoC) as a Result of Investigator-assessed Lack of Efficacy as Confirmed by an Independent RAC Relative to Baseline
Time to first switch to IVIg or other SoC as a result of investigator-assessed lack of efficacy as confirmed by an independent Relapse Adjudication Committee (RAC) relative to Stage B baseline will be reported.
Time frame: Up to 52 weeks
Stage B: Change from Baseline Over Time in Adjusted INCAT Disability Score
Change from Stage B baseline over time in adjusted INCAT disability score will be reported.
Time frame: Up to 52 weeks
Stage B: Change from Baseline Over Time in MRC Muscle Grading Scale Sum Score
Change from Stage B baseline over time in MRC Muscle Grading Scale Sum score will be reported.
Time frame: Up to 52 weeks
Stage B: Change from Baseline Over Time in I-RODS Centile Score
Change from Stage B baseline over time in I-RODS centile score will be reported.
Time frame: Up to 52 weeks
Stage B: Change from Baseline Over Time in Mean Grip Strength (Dominant Hand)
Change from Stage B baseline over time in mean grip strength (dominant hand) will be reported. Grip Strength is a quantifiable, objective performance outcome measure of hand strength, which can be measured using various devices (for example, Martin Vigorimeter and Jamar Dynamometer).
Time frame: Up to 52 weeks
Stage B: Change from Baseline Over Time in Mean Grip Strength (Non-Dominant Hand)
Change from Stage B baseline over time in mean grip strength (non-dominant hand) will be reported. Grip Strength is a quantifiable, objective performance outcome measure of hand strength, which can be measured using various devices (for example, Martin Vigorimeter and Jamar Dynamometer).
Time frame: Up to 52 weeks
Stage B: Number of Participants with Binary Response Endpoint Satisfying all 4 Conditions: a) An Improved Adjusted INCAT Disability Score Compared to Baseline; b) Not Relapsing; c) Not Switching to SoC; d) Not Discontinuing Treatment
Number of participants with Binary response endpoint satisfying all 4 conditions: a) an improved adjusted INCAT Disability Score compared to Stage B baseline; b) not relapsing; c) not switching to SoC; d) not discontinuing treatment, will be reported.
Time frame: Up to 52 weeks
Percentage of Participants with Treatment-emergent Adverse Events (TEAEs)
An adverse event (AE) is any untoward medical occurrence in a participant participating in a clinical study that does not necessarily have a causal relationship with the pharmaceutical/biological agent under study. TEAEs are defined as AEs with onset or worsening on or after date of first dose of study treatment
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Percentage of Participants with Serious Adverse Events (SAEs)
SAE is an adverse event resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly/birth defect; suspected transmission of any infectious agent via a medicinal product or medically important.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Number of Participants with Change in Electrocardiogram (ECG) Values Over Time
Number of participants with change in ECG values over time will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Number of Participants with Change in Vital Signs Values Over Time
Number of participants with change in vital signs values over time will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Number of Participants with Change in Clinical Laboratory Values Over Time
Number of participants with change in clinical laboratory values over time will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Number of Participants with Clinically Significant ECG Abnormalities
Number of participants with clinically significant ECG abnormalities will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Number of Participants with Clinically Significant Vital Signs Abnormalities
Number of participants with clinically significant vital signs abnormalities will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Number of Participants with Clinically Significant Clinical Laboratory Abnormalities
Number of participants with clinically significant clinical laboratory abnormalities will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Percentage of Participants with Suicidal Ideation or Suicidal Behavior based on the Columbia-Suicide Severity Rating Scale (C-SSRS)
Percentage of participants with suicidal ideation or suicidal behavior based on the C-SSRS will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Serum Nipocalimab Concentrations Over Time in Participants Receiving Active Study Intervention
Serum nipocalimab concentrations over time in participants receiving active study intervention will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Number of Participants with Anti-drug Antibodies (ADA) to Nipocalimab
Number of participants with ADA to Nipocalimab will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Titers of ADA to Nipocalimab
Titers of ADA to nipocalimab will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Number of Participants with Neutralizing Antibodies (NAb) to Nipocalimab
Number of participants with NAb to Nipocalimab will be reported.
Time frame: Stage A: 12 weeks; Stage B: Up to 52 weeks
Change from Baseline in Total Serum Immunoglobulin (IgG) Concentrations Levels Over Time
Change from baseline in total serum IgG concentrations levels over time will be reported.
Time frame: Stage A: Baseline to 12 weeks; Stage B: Baseline up to 52 weeks
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Showing the first 100 of 120 sites across 19 countries. Choose a country and city above to see the rest.
Plan to share: Yes — The data sharing policy of Johnson \& Johnson Innovative Medicine is available at www.innovativemedicine.jnj.com/our-innovation/clinical-trials/transparency. As noted on this site, requests for access to the study data can be submitted through Yale Open Data Access (YODA) Project site at yoda.yale.edu
Data sharing details ↗ · innovativemedicine.jnj.com
No publications or documents are linked to this record.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
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Studies of the drug tested here: Nipocalimab
Polyradiculoneuropathy, Chronic Inflammatory Demyelinating →
Janssen Research & Development, LLC →