Clinical trial · Interventional
Rituximab in Treating Patients With Peripheral Neuropathy Caused by Monoclonal Gammopathy of Undetermined Significance
A Phase II Trial of Rituximab for Peripheral Neuropathy Associated With Monoclonal Gammopathy of Undetermined Significance (MGUS)
NCT00588822CI-TRIAL-00014427terminatedPhase 2Results postedClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Why stopped (as posted): Discontinuation due to the high response rate at the 1st stage and slow accrual.
Summary
Brief summary (as posted)
This study was done to find out if the investigational medication, rituximab, could help relieve the symptoms of peripheral neuropathy (such as numbness \[abnormal protein in the blood\] and weakness of the lower and upper extremities) in people who have monoclonal gammopathy of undetermined significance and people with a symptomatic or smoldering Waldestrom macroglobulinemia. Rituximab is an antibody which attacks a particular type of white blood cell (B Cell). By targeting the B-cells which make the abnormal protein which is involved in causing the nerve trouble, it is hoped that damage to nerve fibers will be stopped and improvement will be allowed to proceed.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Precancerous Condition | Monoclonal Gammopathy of Undetermined Significance | ONTOLOGY_EXACT | 0.90 |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Rituximab | Biological | Rituximab | ALIAS |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- Rituximab
- description
- Subjects will receive rituximab administered at the standard dose and schedule as an initial cycle of therapy, followed by a re-evaluation at 6 months. If the neuropathy is stable or responding at 6 months, the subject will receive Cycle 2 of rituximab, followed by a re-evaluation at 12 months. Rituximab will be given as a 375 mg/m\^2 intravenous infusion once weekly for four doses (days 1, 8, 15, and 22).
- interventionNames
- Biological: Rituximab
Primary outcomes (1)
- measure
- Percentage of Subjects With at Least 10 Points Improvement in the Neuropathy Impairment Score (NIS) for Either Side of the Body at 6 Months
- timeFrame
- baseline, 6 months
- description
- The Neuropathy Impairment Score \[previously called the Neurologic Disability Score (NDS)\] is derived from a neurologic examination obtained in a standard way by a specially trained neurologist. Decisions are based on the neurologist's judgment of what is normal considering site, age, sex, weight, height, and physical fitness. The instrument has 35 items, each ranked for left and right sides of the body; weakness is scored 0=normal, 1=25% disability, 2=50% disability, 3=75% disability and 4=100% disability. NIS total score was calculated as the sum of the 35 items, ranging from 0 to 140, with higher score indicating greater disability or impairment. The neurologist measured the NIS score on both sides of the body, but recorded worst score and reported as 1 for each individual subject (i.e., each subject had only 1 reported score.) Improvement was defined as at least 10 points improvement in NIS total score, that is, reduction in the number of points on the scale.
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 21 Years
- Maximum age
- 90 Years
Show eligibility criteria text
DISEASE CHARACTERISTICS:
* Diagnosis of monoclonal gammopathy of undetermined significance (MGUS), as evidenced by 1 of the following criteria:
* Documented monoclonal protein in the serum (\< 3 g/dL) or urine
* Monoclonal serum free light chain, with at least 50% of patients having an immunoglobulin M (IgM) paraprotein (the balance being immunoglobulin G (IgG) or immunoglobulin A (IgA) subtypes)
* Neuropathy Impairment Score (NIS) ≥ 25
* Stable or progressive neuropathy (i.e., not currently improving), as judged by NIS values that have not fallen ≥ 10 (between enrollment and the last documented value), at least 1 month but not greater than 3 months prior to enrollment
* No evidence of amyloidosis or overt lymphoma, overt myeloma, or Waldenström macroglobulinemia with end organ damage
* No evidence of multiple myeloma, Amyloid Light-chain (AL)-amyloidosis
* No evidence of Polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes (POEMS) syndrome, diabetes mellitus, alcohol induced neuropathy, untreated hypothyroidism, vitamin B12 deficiency, Sjögren syndrome, and other causes of neuropathy
PATIENT CHARACTERISTICS:
Inclusion Criteria:
* Not pregnant
* Negative serum pregnancy test
* Fertile patients must use an acceptable method of birth control during treatment and for 6 months after completion of treatment
* One of the following birth control measures must be used: birth control pills, intrauterine device, contraceptive injections (Depo-Provera), barrier methods such diaphragm, condom or contraceptive sponge with spermicide
* Adequate bone marrow function as indicated by sufficient precursors of all three cell lines and cellularity of at least 20% on bone marrow biopsy within 6 months
* Platelets \> 100,000/mm\^3
* Absolute neutrophil count (ANC) \> 1,000/mm\^3
* Hemoglobin \> 7 g/dL
* Serum creatinine \< 3.0 mg/dL
* Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) \< 2 times upper limit of normal
* No history of psychiatric disorder requiring hospitalization, psychiatric consultation, or psychotropic medications within the last year
* Patients with controlled depression are eligible, as defined by the following:
* Stable for at least 6 months
* No increase in psychotropic medications
Exclusion criteria:
* History of HIV infection or seropositivity
* History or serological profile suggesting prior hepatitis B virus (HBV) infection (i.e., HbsAg or anti-HBs with anti-HBc)
* Prior HBV vaccination with isolated anti-HBs antibodies is not an exclusion criterion
* HBV infection or non-vaccination-related HBV seropositivity
* Active infection
* New York Heart Association class III or IV heart disease
* History or baseline ECG tracing demonstrating severe recurrent or severe recent (within 3 months) cardiac dysrhythmia (e.g., ventricular tachycardia, torsades de pointes ("Twisting of the Points," a rapid polymorphic Ventricular Tachycardia), or other serious ventricular dysrhythmias) requiring implanted defibrillator treatment
* Confirmed diagnosis of systemic lupus erythematosus (SLE)
* An isolated low titer positive antinuclear antibody test without clinical evidence of SLE is not an exclusion criterion
* Concomitant malignancies or previous malignancies within the last five years, with the exception of adequately treated basal cell or squamous cell carcinoma of the skin or carcinoma in situ of the cervix
* Malignancy associated with a paraneoplastic neuropathy
* A history of severe allergic or anaphylactic reactions to humanized or murine monoclonal antibodies
* A history of known severe primary or secondary immunodeficiency (e.g., common variable immunodeficiency)
* Significant other uncontrolled medical illnesses that may interfere with drug delivery or interpretation of results
PRIOR CONCURRENT THERAPY:
* No live vaccine therapy within 30 days of enrollment
* No plasmapheresis within 3 months
* No high-dose intravenous immunoglobulin, chemotherapeutic agents, or high-dose corticosteroids (\> 10 mg daily or every other day) within 3 months
* No systemic corticosteroids within 3 months (unless needed for adrenal insufficiency or at a stable dose ≤ 10 mg daily)
* No high-dose (\> 250 mg/day) vitamin B6 within the past month
* No prior treatment with thalidomide or neurotoxic drugs (e.g., vinca alkaloids, taxol, or platinum)References
Publications (0)
Data not yet available
No reference posted for this study.