Eligibility Criteria
Inclusion Criteria:
- Weight of at least 88 lbs (40 kg)
- Diagnosis of Wegener’s granulomatosis (WG) or microscopic polyangiitis (MPA) according to the definitions of the Chapel Hill Consensus Conference
- Newly diagnosed patient of WG or MPA OR must be experiencing a disease flare characterized by: (a) active disease with a BVAS/WG of 3 or greater that would normally require treatment with CYC; OR (b) disease severe enough to require treatment with CYC; OR (c) must be positive for either PR3-ANCA or MPO-ANCA at the screening
- Willing to use acceptable forms of contraception for the duration of the study and for up to 1 year after stopping study medications
- Willing to report pregnancies (female participants or male participants’ partners) occurring at any time during the study and for up to 1 year after stopping study medications
Exclusion Criteria:
- Diagnosis of Churg Strauss syndrome as defined by the Chapel Hill Consensus Conference
- Have limited disease that would not normally be treated with CYC
- Requires mechanical ventilation because of alveolar hemorrhage
- History of severe allergic reactions to human or chimeric monoclonal antibodies
- Active systemic infection
- Have a deep-space infection, such as osteomyelitis, septic arthritis, or pneumonia, complicated by pleural cavity or lung abscess, within 6 months prior to study entry
- History of or current hepatitis B or C infection
- HIV infected
- Acute or chronic liver disease that, in the opinion of the investigator, may interfere with the study
- History of or active cancer diagnosed within the last 5 years. Individuals with squamous cell or basal cell carcinomas of the skin and individuals with cervical carcinoma in situ who have received curative surgical treatment may be eligible for this study.
- History of anti-glomerular basement membrane (anti-GBM) disease
- Other uncontrolled disease, including drug and alcohol abuse, that may interfere with the study
- Pregnancy or breastfeeding
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