Protocol Number: 04-I-0022
Patients 18 to 75 years of age who have a history of at least one relapse of the disease despite standard treatments, who have had active WG within the previous 12 months and are in remission, who are receiving either methotrexate or azathioprine for remission maintenance, and who have circulating ANCA, may be eligible for this study. A minimum of 22 visits to the clinic will be required to complete the entire study. Patients will undergo a comprehensive medical evaluation, with laboratory studies and x-rays. There may also be consultations and possible biopsies of affected organs only if medically indicated for diagnosis and treatment of the disease. In the 4-week period that patients will receive rituximab infusions, the methotrexate or azathioprine will be continued at the same dosage unless there are side effects that requite the medication to be temporarily stopped or the dosage reduced. Patients will receive four doses of rituximab, at 375 mg per meter squared of body surface area, once a week. It will be infused into a vein, through an intravenous catheter. For the first dose, patients will be admitted as inpatients for at least 24 hours, for monitoring during the infusion and for any reactions associated with it. The second, third, and fourth rituximab infusions may be given either on an inpatient or outpatient basis to be decided on how the patient tolerates the first infusion. Following the four infusions, there will be blood tests to monitor the safety of the medication and the status of the disease, to be done at home every week for 4 weeks. Results will be sent to the researchers by fax. Patients will be asked to return to the clinic 1 month after the fourth infusion and every 1 to 3 months afterward. If there are no side effects or a relapse of the disease, the methotrexate or azathioprine will be continued for 2 years past remission. If by then the disease then remains in remission, the dose of either medication will be gradually decreased and eventually stopped. The usual schedule is to reduce methotrexate by 2.5 mg per month and to reduce azathioprine by 25 mg per month. If at that point there are no signs of active disease, the patients' illness will be considered to be in continued remission and no further treatment will be necessary. If relapse does occur, treatment would be different than previously. In most cases, treatment would involve prednisone and cyclophosphamide or methotrexate If the ANCA finding is negative after rituximab treatment and again becomes positive, and there is evidence of a return of B lymphocytes, patients may receive a second course of four rituximab infusions.
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