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Completed

NCT Number: NCT03301467

Controlled Trial Evaluating Avacopan in C3 Glomerulopathy

The aim of this trial is to evaluate the effect of avacopan treatment on renal disease activity in patients with complement component 3 glomerulopathy (C3G). Funding Source - FDA OOPD

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Key information

Conditions

C3 Glomerulopathy (C3G) Female Urogenital Diseases Female Urogenital Diseases and Pregnancy Complications Glomerulonephritis Glomerulonephritis, Membranoproliferative Immune System Diseases Kidney Diseases Male Urogenital Diseases Nephritis Urogenital Diseases Urologic Diseases

Age range

12 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Clinical Site, Antwerp, Belgium

Loading trial locations.

About this study

C3 glomerulopathy (C3G) is characterized by evidence of alternative complement activation based on C3 deposition in the glomeruli. There are two forms of the disease: dense deposit disease (DDD) and C3 glomerulonephritis (C3GN). There is no approved treatment for patients with C3G.

This is a randomized, double blind, placebo controlled Phase 2 study to evaluate the safety and efficacy of avacopan (CCX168) in patients with C3G. Patients receive avacopan 30mg or matching placebo orally twice-daily. The placebo-controlled treatment period is 26 weeks (182 days). This will be followed by 26 weeks during which time all patients will receive avacopan (results for this second period will be reported in due course in a follow-up publication). Thereafter, all patients will be followed for eight weeks (56 days) without study drug treatment. The primary objective is to evaluate the efficacy of avacopan compared to placebo based on histologic changes in kidney biopsies taken at baseline and after 26 weeks of treatment. The primary endpoint will be based on the percent change from baseline in the C3G Histologic Index for disease activity.

Study acquired by Amgen and all disclosures were done by previous sponsor ChemoCentryx.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Biopsy-proven C3G, either DDD or C3GN, with or without a renal transplant, and with the following observations upon renal biopsy taken within 12 weeks prior to screening or during screening:
  • ≥2-levels of magnitude greater staining of C3 than any combination of IgG, IgM, IgA, kappa and lambda light chains, and C1q by immunohistochemistry, and
  • evidence of proliferative glomerulonephritis (mesangial hypercellularity of greater than 3 mesangial cells per mesangial area and/or endocapillary hypercellularity defined as an increased number of cells within glomerular capillary lumina, causing luminal narrowing) based on light microscopy, and
  • confirmation of the presence of electron dense deposits in the glomeruli on electron microscopy corresponding with the C3 immunofluorescence positivity;
  • Male or female subjects, aged at least 18 years; where approved, adolescents (12-17 year old) may be enrolled; female subjects of childbearing potential (i.e., those who have experienced menarche and who is not permanently sterile or postmenopausal, defined as at least 12 consecutive months with no menses without an alternative medical cause) may participate if adequate contraception is used during, and for at least the three months after study completion; Male subjects with partners of childbearing potential may participate in the study if they had a vasectomy at least 6 months prior to randomization or if adequate contraception is used during, and for at least the 3 months after study completion; Adequate contraception is defined as resulting in a failure rate of less than 1% per year (combined estrogen and progestogen [oral, intravaginal, or transdermal], or progestogen-only hormonal contraception (oral, injectable, or implantable), intra-uterine device, intra-uterine hormone releasing system, bilateral tubal occlusion, vasectomized partner, or true sexual abstinence, i.e., in line with the preferred and usual lifestyle of the subject);
  • Willing and able to give written Informed Consent and to comply with the requirements of the study protocol; written Assent and Informed Consent must be obtained from the legal guardian in accordance with regional laws or regulations for subjects 12 to 17 years of age; and
  • Judged to be otherwise fit for the study by the Investigator, based on medical history, physical examination, and clinical laboratory assessments. Subjects with clinical laboratory values that are outside of normal limits (other than those specified in the Exclusion Criteria) and/or with other abnormal clinical findings that are judged by the Investigator not to be of clinical significance, may be entered into the study.

Exclusion criteria

  • Pregnant or nursing;
  • Tubulointerstitial fibrosis appears to be more than 50% based on standard assessment using trichrome staining of the renal biopsy;
  • Use of eculizumab or another anti-C5 antibody within 26 weeks prior to dosing;
  • Secondary C3 disease, e.g., infection-associated disease, or associated with another systemic or autoimmune disease; presence of a monoclonal spike on serum or urine protein electrophoresis or immunofixation assay;
  • Currently on dialysis or likely will require dialysis within 7 days after screening;
  • History or presence of any form of cancer within the 5 years prior to screening, with the exception of excised basal cell or squamous cell carcinoma of the skin, or carcinoma in situ such as cervical or breast carcinoma in situ that has been excised or resected completely and is without evidence of local recurrence or metastasis;
  • Positive hepatitis B virus (HBV), hepatitis C virus (HCV), or human immunodeficiency virus (HIV) viral screening test indicative of acute or chronic infection;
  • Evidence of tuberculosis based on interferon γ release assay (IGRA), tuberculin purified protein derivative (PPD) skin test, or chest radiography done at screening or within 6 weeks prior to screening;
  • WBC count less than 3500/μL, or neutrophil count less than 1500/μL, or lymphocyte count less than 500/μL before start of dosing;
  • Evidence of hepatic disease; AST, ALT, alkaline phosphatase, or bilirubin >3 x the upper limit of normal before start of dosing;
  • Currently using a strong inducer of the CYP3A4 enzyme, such as carbamazepine, phenobarbital, phenytoin, rifampin, or St. John's wort;
  • Known hypersensitivity to avacopan or inactive ingredients of the avacopan capsules (including gelatin, polyethylene glycol, or Cremophor) or inability to swallow the capsules;
  • Participated in any clinical study of an investigational product within 30 days prior to screening or within 5 half-lives after taking the last dose; and
  • History or presence of any medical condition or disease which, in the opinion of the Investigator, may place the subject at unacceptable risk for study participation.

Treatment and study plan

Avacopan

Drug

Orally administered

Other names: CCX168

Avacopan Matching Placebo

Drug

avacopan matching placebo

Other names: placebo

Primary outcomes

  1. Change From Baseline to Week 26 in the C3G Histologic Index for Disease Activity - Subjects With Elevated C5b-9

    Time frame: Week 26

    Change from baseline to Week 26 in the biopsy-based C3G Histologic Index for disease activity - Subjects with Elevated C5b-9 (> 244 ng/mL) in the Intent-to-Treat Population.

    C3G Histological Index for Disease Activity Scores can range from 0 to 21. A decrease indicates improvement.

    C3G=C3 glomerulopathy

  2. Percent Change From Baseline to Week 26 in the C3G Histologic Index for Disease Activity - Combined C5b-9 Strata

    Time frame: Week 26

    Percent change from baseline to Week 26 in the biopsy-based C3G Histologic Index for disease activity - Combined C5b-9 Strata (elevated [> 244 ng/mL] and non-elevated C5b-9) in the Intent-to-Treat Population.

    C3G Histological Index for Disease Activity Scores can range from 0 to 21. A decrease indicates improvement.

    C3G=C3 glomerulopathy

    • Multiple Imputation: Missing Week 26 values are imputed using the regression method to create 100 complete datasets.

Secondary outcomes

  1. Proportion of Subjects Who Have a Histologic Response Defined as a Decrease (Improvement) in the Biopsy-based C3G Histologic Index for Activity of at Least 35% From Baseline to 26 Weeks - Subjects With Elevated C5b-9

    Time frame: Week 26

    Proportion of subjects who have a histologic response defined as a decrease (improvement) in the biopsy-based C3G Histologic Index for activity of at least 35% from baseline to 26 weeks - Subjects with Elevated C5b-9 (> 244 ng/mL) in the Intent-to-Treat Population.

    C3G Histological Index for Disease Activity Scores can range from 0 to 21. A decrease indicates improvement.

    C3G=C3 glomerulopathy

  2. Proportion of Subjects Who Have a Histologic Response Defined as a Decrease (Improvement) in the Biopsy-based C3G Histologic Index for Activity of at Least 35% From Baseline to 26 Weeks - Combined C5b-9 Strata

    Time frame: Week 26

    Proportion of subjects who have a histologic response defined as a decrease (improvement) in the biopsy-based C3G Histologic Index for activity of at least 35% from baseline to 26 weeks - Combined C5b-9 Strata (elevated [> 244 ng/mL] and non-elevated C5b-9) in the Intent-to-Treat Population.

    C3G Histological Index for Disease Activity Scores can range from 0 to 21. A decrease indicates improvement.

    C3G=C3 glomerulopathy

  3. Change From Baseline to Week 26 in the C3G Histologic Index for Disease Chronicity - Subjects With Elevated C5b-9

    Time frame: Week 26

    Change from baseline to Week 26 in the biopsy-based C3G Histologic Index for disease chronicity over the placebo-controlled treatment period - Subjects with Elevated C5b-9 (> 244 ng/mL) in the Intent-to-Treat Population.

    C3G Histological Index for Disease Chronicity Scores can range from 0 to 10. A decrease indicates improvement.

    C3G=C3 glomerulopathy

  4. Change From Baseline to Week 26 in the C3G Histologic Index for Disease Chronicity - Combined C5b-9 Strata

    Time frame: Week 26

    Change from baseline to Week 26 in the biopsy-based C3G Histologic Index for disease chronicity over the placebo-controlled treatment period - Combined C5b-9 Strata (elevated [> 244 ng/mL] and non-elevated C5b-9) in the Intent-to-Treat Population.

    C3G Histological Index for Disease Chronicity Scores can range from 0 to 10. A decrease indicates improvement.

    C3G=C3 glomerulopathy

  5. Renal Function as Assessed by Percent Change From Baseline Over 26 Weeks in eGFR - Subjects With Elevated C5b-9

    Time frame: Week 26

    The percent change from baseline over 26 weeks in estimated Glomerular Filtration Rate (eGFR) - Subjects with Elevated C5b-9 (> 244 ng/mL) in the Intent-to-Treat Population.

  6. Renal Function as Assessed by Percent Change From Baseline Over 26 Weeks in eGFR - Combined C5b-9 Strata

    Time frame: Week 26

    The percent change from baseline over 26 weeks in estimated Glomerular Filtration Rate (eGFR) - Combined C5b-9 Strata (elevated [> 244 ng/mL] and non-elevated C5b-9) in the Intent-to-Treat Population.

  7. Renal Function as Assessed by Change From Baseline Over 26 Weeks in eGFR - Subjects With Elevated C5b-9

    Time frame: Week 26

    The change from baseline over 26 weeks in estimated Glomerular Filtration Rate (eGFR) - Subjects with Elevated C5b-9 (> 244 ng/mL) in the Intent-to-Treat Population.

  8. Renal Function as Assessed by Change From Baseline Over 26 Weeks in eGFR - Combined C5b-9 Strata

    Time frame: Week 26

    The change from baseline over 26 weeks in estimated Glomerular Filtration Rate (eGFR) - Combined C5b-9 Strata (elevated [> 244 ng/mL] and non-elevated C5b-9) in the Intent-to-Treat Population.

  9. Percent Change From Baseline Over 26 Weeks in UPCR in Patients With Abnormal UPCR at Baseline - Subjects With Elevated C5b-9

    Time frame: Week 26

    Percent change from baseline Over 26 Weeks in UPCR in patients with Abnormal UPCR at Baseline (>= 0.15 g/g) - Subjects with Elevated C5b-9 (> 244 ng/mL) in the Intent-to-Treat Population.

    LSM=Least Squares Mean; UPCR = Urine Protein : Creatinine Ratio

  10. Percent Change From Baseline Over 26 Weeks in UPCR in Patients With Abnormal UPCR at Baseline - Combined C5b-9 Strata

    Time frame: Week 26

    Percent change from baseline Over 26 Weeks in UPCR in patients with Abnormal UPCR at Baseline (>= 0.15 g/g) - Combined C5b-9 Strata (elevated [> 244 ng/mL] and non-elevated C5b-9) in the Intent-to-Treat Population.

    LSM=Least Squares Mean; UPCR = Urine Protein : Creatinine Ratio

  11. Percent Change From Baseline Over 26 Weeks in Urinary MCP-1 - Subjects With Elevated C5b-9

    Time frame: Week 26

    Percent change from baseline over 26 weeks in urinary MCP-1: creatinine ratio - Subjects with Elevated C5b-9 (> 244 ng/mL) in the Intent-to-Treat Population.

    LSM=Least Squares Mean; MCP-1=Monocyte Chemoattractant Protein-1

  12. Percent Change From Baseline Over 26 Weeks in Urinary MCP-1 - Combined C5b-9 Strata

    Time frame: Week 26

    Percent change from baseline over 26 weeks in urinary MCP-1: creatinine ratio - Combined C5b-9 Strata (elevated [> 244 ng/mL] and non-elevated C5b-9) in the Intent-to-Treat Population.

    LSM=Least Squares Mean; MCP-1=Monocyte Chemoattractant Protein-1

  13. Change From Baseline Over 26 Weeks in EQ-5D-5L Health Scale VAS and Index Score - Subjects With Elevated C5b-9

    Time frame: Week 26

    Change from baseline over 26 weeks in EQ-5D-5L Health Scale VAS and Index Score - Subjects with Elevated C5b-9 (> 244 ng/mL) in the Intent-to-Treat Population.

    EQ-5D-5L: EuroQuality of Life-5 Domains-5 Levels. The EQ-5D-5L consists of 2 pages: the EQ-5D descriptive system and the EQ visual analogue scale (EQ VAS). The descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. The answers given can be converted into an Index Score ranging from 0 for death to 1 for perfect health. The EQ-5D questionnaire also includes a Visual Analog Scale (VAS), by which respondents can report their perceived health status with a grade ranging from 0 (the worst imaginable health) to 100 (the best imaginable health).

  14. Change From Baseline Over 26 Weeks in EQ-5D-5L Health Scale VAS and Index Score - Combined C5b-9 Strata

    Time frame: Week 26

    Change from baseline over 26 weeks in EQ-5D-5L Health Scale VAS and Index Score - Combined C5b-9 Strata (elevated [> 244 ng/mL] and non-elevated C5b-9) in the Intent-to-Treat Population.

    EQ-5D-5L: EuroQuality of Life-5 Domains-5 Levels. The EQ-5D-5L consists of 2 pages: the EQ-5D descriptive system and the EQ visual analogue scale (EQ VAS). The descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. The answers given can be converted into an Index Score ranging from 0 for death to 1 for perfect health. The EQ-5D questionnaire also includes a Visual Analog Scale (VAS), by which respondents can report their perceived health status with a grade ranging from 0 (the worst imaginable health) to 100 (the best imaginable health).

  15. Change From Baseline Over 26 Weeks in SF-36 v2 - Subjects With Elevated C5b-9

    Time frame: Week 26

    Change from baseline over 26 weeks in SF-36 v2 - Subjects with Elevated C5b-9 (> 244 ng/mL) in the Intent-to-Treat Population.

    SF-36v2: Medical Outcomes Survey Short Form-36 version 2.

    SF-36v2 measures each of the following eight health domains: Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and Mental Health. Scores on each item are summed and averaged. The SF-36v2 component domain scores range from 0 (worst health) to 100 (best health).

  16. Change From Baseline Over 26 Weeks in SF-36 v2 - Combined C5b-9 Strata

    Time frame: Week 26

    Change from baseline over 26 weeks in SF-36 v2 - Combined C5b-9 Strata (elevated [> 244 ng/mL] and non-elevated C5b-9) in the Intent-to-Treat Population.

    SF-36v2: Medical Outcomes Survey Short Form-36 version 2.

    SF-36v2 measures each of the following eight health domains: Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and Mental Health. Scores on each item are summed and averaged. The SF-36v2 component domain scores range from 0 (worst health) to 100 (best health).

  17. Number of Subjects With Treatment-emergent SAEs, AEs, Relatedness to Study Medication and Withdrawals Due to AEs

    Time frame: From day 1 throughout the study period (day 182/week 26)

    Number of Subjects with Treatment-emergent SAEs, AEs, relatedness to study medication and Withdrawals Due to AEs

    AEs=Adverse events SAEs=Serious adverse events TEAE=Treatment-emergent adverse events 'Possibly related' refers to the Investigators' causality assessment

  18. Number of Treatment-emergent SAEs, AEs, Relatedness to Study Medication and Withdrawals Due to AEs

    Time frame: From day 1 throughout the study period (day 182/week 26)

    Number of Treatment-emergent SAEs, AEs, relatedness to study medication and Withdrawals Due to AEs

    AEs=Adverse events SAEs=Serious adverse events TEAE=Treatment-emergent adverse events 'Possibly related' refers to the Investigators' causality assessment

Sponsors and collaborators

Lead sponsor

Amgen

Industry

Collaborators

  • Medpace, Inc.

Registry information

Official study title

A Randomized, Double Blind, Placebo Controlled Phase 2 Study to Evaluate the Safety and Efficacy of Avacopan (CCX168) in Patients With C3 Glomerulopathy

Acronym: ACCOLADE

Important dates

Study start
2017
Primary completion
2021
Study completion
2021
First posted
Oct 4, 2017
Registry last updated
Mar 13, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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