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Purpose

The primary objective of this study is to evaluate the long-term safety of avacopan in participants with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV).

Condition

Eligibility

Eligible Ages
Between 18 Years and 100 Years
Eligible Genders
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  • Participants has provided informed consent before initiation of any study-specific activities/procedures. - Newly diagnosed or relapse of granulomatosis with polyangiitis or microscopic polyangiitis, consistent with Chapel-Hill Consensus Conference definitions (Jennette et al, 2013), where induction treatment with cyclophosphamide or rituximab is needed. - Age >/= 18 years (or >/= legal age within the country if it is older than 18 years). - Positive test for anti-positive antiproteinase 3 or antimyeloperoxidase (current or historic) antibodies. - At least 1 Birmingham Vasculitis Activity Score (BVAS) major item, or at least 3 BVAS nonmajor items, or at least the 2 renal items of proteinuria and hematuria. - eGFR >/= 15 mL/min/1.73 m^2 (using Chronic Kidney Disease Epidemiology Collaboration equations).

Exclusion Criteria

  • Alveolar hemorrhage requiring invasive pulmonary ventilation support anticipated to last beyond the screening period of the study. - Any other known multisystem autoimmune disease including eosinophilic granulomatosis with polyangiitis (GPA [Churg-Strauss]), systemic lupus erythematosus, immunoglobulin (Ig) A vasculitis (Henoch-Schönlein), rheumatoid vasculitis, Sjogren's syndrome, anti-glomerular basement membrane disease, or cryoglobulinemic vasculitis. - Any medical condition requiring or expected to require continued use of immunosuppressive therapies, including corticosteroids that may cause confoundment with study assessments and study conclusions. - Received dialysis or plasma exchange within 12 weeks before signing of the informed consent. - Have had a kidney transplant. - Malignancy (except curatively treated nonmelanoma skin cancers, curatively treated cervical carcinoma in situ, or breast ductal carcinoma in situ within the last 5 years before signing the informed consent). - Acute or chronic, active hepatitis B virus or hepatitis C virus, or human immunodeficiency virus infection during screening. - Positive test for active or latent tuberculosis during screening. - White blood cell count < 3500/µL, neutrophil count < 1500/µL, or lymphocyte count < 500/µl. Note: Complete Blood Count can be repeated once in the screening period per investigator discretion. In this case, eligibility will be determined based on the repeat complete blood count. - Evidence of clinically significant hepatic disease including prior diagnosis of cirrhosis. - Aspartate aminotransferase (AST), alanine aminotransferase (ALT), or alkaline phosphatase (ALP) >2.0 times the upper limit of normal (ULN). - Total bilirubin > 1.5 times the ULN. A participant with documented Gilbert's syndrome with total bilirubin < 2 x ULN may be eligible. - Active infection and/or infection requiring oral or intravenous (IV) anti-infective agents within 4 weeks before signing of the informed consent or completion of oral anti-infective agents within 2 weeks prior to signing informed consent. - History of any clinically significant cardiovascular disease, such as symptomatic congestive heart failure, unstable angina, myocardial infarction or stroke, within 12 weeks before signing of the informed consent. - Received cyclophosphamide (CYC) within 12 weeks before signing the informed consent; if on azathioprine (AZA), mycophenolate, or methotrexate at the time of screening, these drugs must be withdrawn before receiving the CYC or rituximab (RTX). Note: If induction therapy with cyclophosphamide was started within 1 week before signing the informed consent for the current episode of newly diagnosed or relapse of GPA or MPA, the participant may be eligible, provided no cyclophosphamide was received within 12 weeks before the start of the current induction therapy and if on AZA, mycophenolate, or MTX, these were withdrawn prior to receiving the current induction therapy with cyclophosphamide. - Have been taking an oral daily dose of a glucocorticoid of more than 10 mg prednisone equivalent for more than 6 weeks continuously before signing of the informed consent. - Received RTX or other B-cell depleting therapies within 26 weeks before signing of the informed consent. Note: If induction therapy with rituximab was started within 1 week before signing the informed consent for the current episode of newly diagnosed or relapse of GPA or MPA, the participant may be eligible, provided no rituximab was received within 26 weeks before the start of the current induction therapy and if on AZA, mycophenolate, or MTX, these were withdrawn prior to receiving the current induction therapy with RTX. - Received any of the following within 12 weeks before signing the informed consent: - antitumor necrosis factor treatment - abatacept - alemtuzumab - IV Ig - belimumab - tocilizumab. - Taking a strong or moderate inducer of the cytochrome P450 3A4 (CYP3A4) enzyme unless the strong or moderate CYP3A4 inducer can be changed to an alternative medicine at least 1 week before Day 1. - Received an investigational drug within 30 days or within 5 half-lives (whichever is longer) before signing of the informed consent. - Previously received avacopan without clinical benefit per the Investigator's opinion or received avacopan within 60 days before signing of the informed consent.

Study Design

Phase
Phase 4
Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel Assignment
Primary Purpose
Treatment
Masking
Double (Participant, Investigator)

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
Group A: Avacopan + Standard of Care (SoC) 		Avacopan 30 mg twice daily for 5 years + SoC background immunosuppressive therapy.
  • Drug: Avacopan
    Administered orally.
    Other names:
    • CCX168
  • Drug: Standard of Care
    All participants will receive SoC background immunosuppressive therapy for induction and maintenance, at the discretion of the Investigator and as supported by current guidelines, product labels and local practices and informed by the individual participant's clinical condition, preferences, and values.
Experimental
Group B: Avacopan/Placebo + SoC 		Avacopan 30 mg twice daily for 1 year, followed by placebo twice daily for 4 years + SoC background immunosuppressive therapy.
  • Drug: Avacopan
    Administered orally.
    Other names:
    • CCX168
  • Drug: Placebo
    Administered orally.
  • Drug: Standard of Care
    All participants will receive SoC background immunosuppressive therapy for induction and maintenance, at the discretion of the Investigator and as supported by current guidelines, product labels and local practices and informed by the individual participant's clinical condition, preferences, and values.
Placebo Comparator
Group C: Placebo + SoC 		Placebo twice daily for 5 years + SoC background immunosuppressive therapy.
  • Drug: Placebo
    Administered orally.
  • Drug: Standard of Care
    All participants will receive SoC background immunosuppressive therapy for induction and maintenance, at the discretion of the Investigator and as supported by current guidelines, product labels and local practices and informed by the individual participant's clinical condition, preferences, and values.

Recruiting Locations

Massachusetts General Hospital
Boston, Massachusetts 02114

More Details

Status
Recruiting
Sponsor
Amgen

Study Contact

Amgen Call Center
866-572-6436
medinfo@amgen.com

Notice

Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.