ClinicalTrials.gg
Active, not recruitingNCT05877040Updated May 26, 2023

A Proof of Concept Study With Rituximab in Patients With CIDP Not Responding to Conventional Immune Therapy

A Phase 2 interventional study of Rituximab in Polyradiculoneuropathy, Chronic Inflammatory Demyelinating, sponsored by Istituto Clinico Humanitas. Active, not recruiting at 1 site in Italy. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2023-05-26.

Sponsored by Istituto Clinico Humanitas · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Registered 3 years 11 months after the study started (first participant enrolled Jun 2019, registered May 2023).

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Phase
Phase 2
Study type
Interventional
Enrollment
20
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-13

Among 28 studies in Polyradiculoneuropathy, Chronic Inflammatory Demyelinating with a site in Italy — 11 open to participants now, 15 under way, 8 of them phase 3. Polyradiculoneuropathy, Chronic Inflammatory Demyelinating · Italy.

Enrollment
25th of 26
20 · median 113
Started
2019
with 1 other
Phase 2
7 of 28
1 open now
Primary completion
2023-03
later than 0 of 14 live
Registered
14th of 28
by date
Lead sponsor
3 of 28
Istituto Clinico Humanitas

Among the 28 studies in Polyradiculoneuropathy, Chronic Inflammatory Demyelinating with a site in Italy, this one is the 25th largest by enrollment of the 26 interventional ones that give a count, is one of 2 that started in 2019, is one of 7 in phase 2, reaches primary completion later than 0 of the 14 other live ones, and was the 14th registered.

Polyradiculoneuropathy, Chronic Inflammatory Demyelinating

137 studies on the registry are indexed under Polyradiculoneuropathy, Chronic Inflammatory Demyelinating; 51 are open to participants now.

Browse Polyradiculoneuropathy, Chronic Inflammatory Demyelinating studies →

Open to participants now

11 of the 28 studies in Polyradiculoneuropathy, Chronic Inflammatory Demyelinating with a site in Italy are open now. Recruiting first, the newest first:

6 more — sign in →

All 11 open studies →

A study can be open while its sites in Italy have not opened yet or have stopped. Only those recruiting at a site in Italy →

Who these studies take

Of the 36 Polyradiculoneuropathy, Chronic Inflammatory Demyelinating studies recruiting now, 24 (67%) set no upper age limit and 9 (25%) stop at 75 or younger; 4 take children under 18; 2 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 28 studies in Polyradiculoneuropathy, Chronic Inflammatory Demyelinating with a site in Italy, or all of them as a file.
02

Study summary

Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is a chronic and often disabling neuropathy that often responds to immune therapies. A few phenotypes have been identified even if it is unclear whether they are variants of CIDP or different diseases considering their relatively different responses to therapy. Antibodies against proteins at the node of Ranvier, including contactin 1 and neurofascin 155, have been reported in up to 10% of the patients and were associated to a poor response to CIDP therapy but a positive response to Rituximab supporting the heterogeneity of CIDP. We will examine these antibodies in a large population of Italian CIDP patients included in a Database and correlate their presence with the clinical and electrophysiological features of the neuropathy, its progression and response to therapy. We will perform an open label prospective therapeutic study with Rituximab in patients with CIDP not responsive to conventional immune therapies and will correlate the response to therapy to the clinical phenotype and the presence of anti-neural antibodies.This may lead to a more appropriate choice of therapy in CIDP avoiding the use of expensive and possibly ineffective therapy. We will also collect the biological samples (serum and when available CSF) of the patients with CIDP and store them to allow the formation of a biological bank that may be used in future immunological studies to clarify the pathogenesis a of the disease and possibly to identify biomarkers of the disease and of response to therapy. This study will permit to collect a sufficiently large number of adequately and homogeneously examined patients with CIDP, with different antibody reactivities and with unsatisfactory response to therapy. This will permit to have sufficiently large number of patients to perform an open-label study with Rituximab whose efficacy has been so far reported only in anecdotal reports on small number of patients.

03

Conditions studied

  • Polyradiculoneuropathy, Chronic Inflammatory Demyelinating
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

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.

Inclusion criteria

  1. Subject is ≥ 18 years of age at Visit1 (screening) and who signed the form for the study
  2. Subject has a documented diagnosis of definite or probable CIDP according to the EFNS/PNS criteria 2010 (Joint Task Force of the EFNS and the PNS, 2010)
  3. Subject has not improved after and adequate dose of therapy with intravenous immunoglobulins (IVIg) corresponding to at least 2 g/kg monthly for two months, corresponding to the equivalent of at least 1 mg/kg daily of oral prednisone for two months or a course of at least 4 plasma exchanges within two weeks.
  4. Subject can take steroids at the maximum dosage equivalent to 25 mg/day of prednisone or pulsed 600 mg/monthly of methylprednisolone as far as the dosage has not been increased (+ 20%) in the previous 6 months and has not determined a satisfactory response to therapy.
  5. Female subjects of according with the CTFG guidelinesa must have a negative serum pregnancy test and agree to use a highly effective method of in accordance with the CTFG guidelinesb during the study and for a period of 12 months after their last dose of study drug.
  6. Male subject, when sexually active, with a partner of childbearing potential according with the CTFG guidelinesa must be willing to use a highly effective method of birth control in accordance with the CTFG recommendationsb during the study and for 12 months after the final administration of rituximab.

Exclusion criteria

Exclusion Criteria:

Subject has a current diagnosis or has a history of Type 1 or Type 2 diabetes mellitus 2. Subject has IgM paraproteinemia with anti-myelin associated glycoprotein antibodies 3. Subject has Multifocal Motor Neuropathy with conduction block (MMN) 4. Clinical or known evidence of associated medical conditions that might cause neuropathy, including but not limited to connective tissue disease, Lyme disease, cancer (with the exclusion of benign skin cancer), Castleman's disease and systemic lupus erythematosus, malignant plasma cell dyscrasia, lymphoma, osteosclerotic myeloma, POEMS, or assumption of agents that may lead to neuropathy (eg, amiodarone therapy).

  1. Female who is pregnant or lactating 6. Subjects with any medical or psychiatric condition (acute or chronic) that, in the opinion of the investigator, could harm the subject or would compromise the subject's ability to participate in the study.
  1. Subjects with congestive heart failure or a moderate or severe impairment of cardiac function 8. Subjects with renal impairment defined as: serum creatinine > 1.4 mg/dL for females and 1.5 mg/dL for males 9. Subjects with an absolute leukocyte count \<4000/mm3, lymphocyte count \<800/mm3, count \<100,000/mm3 10. Subjects with liver impairment defined as total or conjugated >1.5 × (ULN) range, unless in context of Gilbert's syndrome; (AST), alanine aminotransferase (ALT) >3 × ULN range; alkaline phosphatase (AP) >1.5 × ULN range; gamma-glutamyl-transferase (GGT) >3 × ULN range 11. Subjects with a history of ongoing chronic infections including but not limited to (HIV), , , active or latent tuberculosis or is tested positive for HIV (anti-HIV1 or anti-HIV2 antibodies) hepatitis B (HBsAG positive or HBcAb positive without HBsAb) or hepatitis C (HCV antibodies) at the screening visit.
  1. Subject has a family history of primary immunodeficiency 13. Subject has a clinically relevant active infection (eg. sepsis, pneumonia, and abscess) or has had a serious infection (resulting in hospitalization or parenteral antibiotic treatment) within 6 weeks prior to the first dose of rituximab.
  1. Subject has an active neoplastic disease or history of neoplastic disease within 5 years of study entry (except for basal or squamous cell carcinoma of the skin or carcinoma in situ of the uterine cervix which has been definitely treated with standard of care approaches).
  1. Subject was treated with plasma exchange or immunoabsorption within one month before inclusion, with /chemotherapeutic medications including azathioprine, cyclophosphamide, cyclosporine, mycophenolate, etanercept, methotrexate within 6 months before inclusion, other immunosuppressive medications (including mitoxantrone, alemtuzumab, cladribine, pimecrolimus , IPP-201101) at any time; total lymphoid irradiation or hematopoietic stem cell transplantation at any time; any biological therapy within 12 months before inclusion.
  1. Subject has received a within 8 weeks prior to the baseline visit or intends to have live vaccination during the course of the study or within 7 weeks following the final dose of rituximab.
  1. Subject has had prior treatment with rituximab in the 12 months before inclusion 18. History of to Rituximab or to drugs of similar chemical classes
Terms in these criteria, in plain language(15)

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.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

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.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

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.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Live vaccines

Vaccines made with a weakened form of the germ, such as measles–mumps–rubella (MMR), chickenpox and yellow fever. They can be risky when the immune system is weakened. Flu injections are not live; the nasal flu spray is.

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.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
20 participants (actual)

Study arms

  • Experimental
    Treated

    Drug: Rituximab

Interventions

  • Open label proof-of-concept study with intravenous Rituximab, given at the dose of 1g in one day, followed by the same dose after two weeks

06

What researchers measure

Primary outcomes

  1. Inflammatory Neuropathy Cause and Treatment (INCAT) Disability Scale

    The proportion of patients with CIDP not responsive to conventional immune therapies that improve after therapy with rituximab

    Time frame: 6 months

  2. Medical Research Council sum score

    The proportion of patients with CIDP not responsive to conventional immune therapies that improve after therapy with rituximab

    Time frame: 6 months

  3. Inflammatory Rasch-built Overall Disability Scale (I-RODS)

    The proportion of patients with CIDP not responsive to conventional immune therapies that improve after therapy with rituximab

    Time frame: 6 months

Secondary outcomes

  1. Inflammatory Neuropathy Cause and Treatment (INCAT) Disability Scale

    Proportion of patients with CIDP not responsive to conventional immune therapies that improve after therapy with rituximab

    Time frame: 12 months

  2. Medical Research Council sum score

    Proportion of patients with CIDP not responsive to conventional immune therapies that improve after therapy with rituximab

    Time frame: 12 months

  3. Inflammatory Rasch-built Overall Disability Scale (I-RODS)

    Proportion of patients with CIDP not responsive to conventional immune therapies that improve after therapy with rituximab

    Time frame: 12 months

  4. Treatment discontinuation

    Proportion of patients discontinuing treatment with rituximab due to side effects or voluntary withdrawal or developing these effects within 12 months following treatment

    Time frame: 12 months

  5. Duration of clinical improvement after therapy with rituximab

    Time frame: 24 months

  6. Proportion of patients that improve 6 and 12 months after therapy with rituximab in subgroups defined according to the presence or absence of antibody reactivities

    Time frame: 6 and 12 months

  7. Proportion of patients that improve 6 and 12 months after therapy with rituximab in subgroups defined according to the CIDP clinical form (typical or atypical)

    Time frame: 6 and 12 months

07

Study locations

1 site
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Jun 2019 to primary completion in Mar 2023, 45 months.

How these figures are worked out, and which studies are left out of them.

Registered
May 17, 2023
First posted
May 26, 2023
StartActual
Jun 1, 2019
Primary completionActual
Mar 30, 2023
CompletionEst.
Sep 30, 2023
Last update
May 26, 2023
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 26, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT05877040
Responsible party
Sponsor
First posted
May 26, 2023
Start date
Jun 1, 2019
Primary completion
Mar 30, 2023
Completion
Sep 30, 2023 (estimated)
Last update
May 26, 2023

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in May 2023. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: Rituximab

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