Eculizumab Therapy for Dense Deposit Disease and C3 Nephropathy

Dense Deposit Disease Clinical Trial

Official title:

Eculizumab Therapy for Dense Deposit Disease and C3 Nephropathy

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01221181
• Other study ID #: AAAF2403
• Status: Completed
• Phase: Phase 1
• Start date: July 2010
• Est. completion date: October 2011

Study information

• Verified date: February 2019
• Source: Columbia University
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

This open label, non-blinded, proof of concept efficacy and safety study of eculizumab in patients with biopsy proven DDD or C3 nephropathy. The trial will consist of adult patients with these diseases who have > 1 gram of proteinuria or a decreased glomerular filtration rate (GFR), both predictors of a poor long-term outcome in many glomerular diseases. The patients will be treated with eculizumab for one year.

The goals will be to determine whether treatment leads to an improvement in kidney function, defined by remissions of proteinuria and improvements in estimated GFR (measured by serum creatinine), and to improvement in histologic parameters, including percentage of non-affected glomeruli, interstitial fibrosis, intensity of C3 staining of immunofluorescence, and amount of electron dense deposits by electron microscopy.

Description:

Dense deposit disease (DDD), also called membranoproliferative glomerulonephritis (MPGN) type II, is a rare form of glomerulonephritis named because of the characteristic appearance of electron-dense material in the glomerular basement membrane observed on kidney biopsy. The principle immune defect in DDD is excessive activation of the alternative complement pathway, with deposition of complement components in the glomerular basement membrane. Hence, by immunofluorescence microscopy, there is heavy C3 deposited along the basement membrane. Some patients have been found to have deficiencies of Factor H or Factor I, inhibitors of C3 activation. Others have a C3 nephritic factor, an antibody that activates the alternative complement cascade. It has recently been recognized that C3 nephropathy, a rare glomerular disease with mesangial cell proliferation and C3 deposition by immunofluorescence microscopy, is associated with similar over-activation of the alternative complete cascade.

While DDD affects mostly children and young adults, in the series of 32 patients from Columbia with DDD whose biopsies were read from 1977-2007, 18 patients (56%) were older than 16 years of age at the time of diagnosis, and about 40% of patients were over 30 years old. The age division is important for two reasons. First, in the Columbia series, children appeared to have better clinical outcomes than adults. While 25.9% of all patients had a complete remission, there was a significant distinction between adults, of whom only 7.1% achieved complete remission, and children, of whom 46.1% achieved complete remission. Of the remaining patients who did not achieve remission, 42.9% of adults, compared to only 7.7% of children, progressed to end stage renal disease (ESRD) over a mean follow-up of over 5 years. Second, as there are no large clinical trials to guide specific interventions for DDD and the role of immunomodulatory therapies still remains controversial, many nephrologists advocate using immunomodulatory therapy only in selected adult patients.

Immunomodulatory therapies not specifically targeted to DDD, such as corticosteroids, cyclophosphamide, and calcineurin inhibitors, have either been unsuccessful or not studied in a meaningful number of patients to warrant routine use. However, as the principal defect underlying DDD is excessive activation of the alternative complement pathway, with deposition of complement components in the glomerular basement membrane, a therapy that directly targets the alternative complement pathway may prove particularly beneficial for this disease.

Eculizumab is a humanized monoclonal antibody that binds with high affinity to C5. The drug is FDA-approved for the treatment of paroxysmal nocturnal hemoglobinuria (in which mutations of complement regulatory proteins on hematopoietic cells lead to alternative complement pathway-mediated hemolysis). It is currently being studied for use in atypical hemolytic uremic syndrome, a rare disease marked by diffuse micro-thromboses related to activation of the alternative complement system. Eculizumab prevents cleavage of C5, thereby precluding formation of C5a, which has been implicated in glomerular inflammation in animal models of DDD. Moreover, by inhibiting the activation of C5, it prevents the formation of the membrane attack complex C5-9. Speculatively, this drug could provide effective, targeted therapy for patients with DDD.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 6
• Est. completion date: October 2011
• Est. primary completion date: October 2011
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Adult patients with biopsy proven DDD or C3 nephropathy, at least 18 years of age

• 24-hour urine protein > 1000 mg/day, urine protein:creatinine ratio > 1.0, or acute renal failure (defined as > 50% increase in serum creatinine from baseline)

• Willing and able to sign informed consent

• Patients of childbearing age must agree to use birth control

• Patients must be willing to be vaccinated against meningococcal disease or have documentation of previous vaccination against meningococcal disease

Exclusion Criteria:

• Patients under 18 years of age

• Patients unable to sign informed consent

• Patients having received rituximab or another monoclonal antibody within 6 months of the trial

• Patients currently taking and unable to discontinue other immunomodulatory therapies (e.g. cyclosporine, high-dose steroids, mycophenolate mofetil) unless these other therapies are indicated for prophylaxis of transplant rejection (e.g. stable doses of mycophenolate mofetil and/or calcineurin inhibitor). Patients on chronic steroid therapy who are unable to taper down to <10 mg/day will be excluded.

• Patients of childbearing age who refuse to use birth control

• Patients with a baseline estimated GFR less than 30 ml/min/1.73m2

• Patients with other renal diseases (e.g. diabetic nephropathy, renal vascular disease) that would interfere with interpretation of the study.

• Patients with comorbid conditions that would interfere with completion of the trial (malignancies, congestive heart failure (CHF), recent myocardial infarction).

• Patients with known contraindications to the use of eculizumab, including refusal to receive N. meningitides vaccine prior to therapy

Related Conditions & MeSH terms

• Dense Deposit Disease
• Glomerulonephritis
• Glomerulonephritis, Membranoproliferative
• Kidney Diseases
• Membranoproliferative Glomerulonephritis

Intervention

Drug:
• Eculizumab
Dosage/Frequency: 900 mg IV once a week for 4 weeks, 1200 mg IV week 5, then 1200 mg IV every 2 weeks through week 53.

Locations

Country	Name	City	State
United States	Columbia University Medical Center, Glomerular Center	New York	New York
United States	Columbia University Medical Center, Nephrology Clinical Research Center	New York	New York

Sponsors (2)

Lead Sponsor	Collaborator
Columbia University	Alexion Pharmaceuticals

Country where clinical trial is conducted

United States, 

References & Publications (1)

Bomback AS, Smith RJ, Barile GR, Zhang Y, Heher EC, Herlitz L, Stokes MB, Markowitz GS, D'Agati VD, Canetta PA, Radhakrishnan J, Appel GB. Eculizumab for dense deposit disease and C3 glomerulonephritis. Clin J Am Soc Nephrol. 2012 May;7(5):748-56. doi: 10 — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Number of Patients With Change in Proteinuria or Serum Creatinine Over Treatment Period	This is designed to measure response to eculizumab through clinical and histological data, including a reduction in serum creatinine or in proteinuria, or histopathologic improvement. Any reduction in serum creatinine and/or proteinuria was included in our descriptive analysis.	One year

External Links

•   Eculizumab for dense deposit disease and C3 glomerulonephritis
•   Pathology after eculizumab in dense deposit disease and C3 glomerulonephritis