Summary

Eligibility
for people ages 18-75 (full criteria)
Location
at UC Davis UCLA UCSF
Dates
study started
completion around
Principal Investigator
by Suphamai Bunnapradist (ucla)

Description

Summary

This trial investigates the efficacy and safety of clazakizumab [an anti-interleukin (IL)-6 monoclonal antibody (mAb)] for the treatment of CABMR in recipients of a kidney transplant.

Official Title

A Pivotal Phase 3 Trial to Evaluate the Safety and Efficacy of Clazakizumab for the Treatment of Chronic Active Antibody-mediated Rejection in Kidney Transplant Recipients

Keywords

Antibody-mediated Rejection, Chronic Active, Antibody-mediated Rejection (AMR), Clazakizumab, Physiologic saline solution

Eligibility

You can join if…

Open to people ages 18-75

  1. Age 18-75 years.
  2. Living donor/deceased donor kidney transplant recipients ≥6 months from time of transplant.
  3. Diagnosis of CABMR determined by kidney biopsy and the presence of HLA DSA using single-antigen bead-based assays. For eligibility, kidney biopsy must not be older than 12 months and DSA analysis must be performed no longer than 6 months prior to the start of Screening.

    NOTE: • Within 3 months prior to the start of Screening, treatments for ABMR or TCMR, with the exception of steroids*, are not allowed (see Exclusion Criterion 3).

    • If treatment for ABMR (including CABMR) or TCMR (other than steroids*) was given between 3 to 12 months of Screening, a repeat kidney biopsy and DSA analysis are required at least 6 weeks after the end of treatment to confirm continuing CABMR and presence of HLA DSA and to determine eligibility.

    • A maximum dose of 2g of methylprednisolone intravenously (or dose equivalent of other steroids), followed by a taper to the original maintenance steroid dose is allowed.

    The following histopathologic and serologic diagnostic criteria (based on Banff 2015 criteria [Loupy et al, 2017]) must be met for inclusion:

    1. Morphologic evidence of chronic tissue injury, as demonstrated by transplant glomerulopathy (TG) (cg) > 0). Biopsies without evidence of chronic tissue injury on light microscopy, but with glomerular basement membrane double contours on electron microscopy (cg1a) are eligible.
    2. Evidence of current/recent antibody interaction with vascular endothelium, including 1 or more of the following:
    3. Linear C4d staining in peritubular capillaries or medullary vasa recta (Banff scores C4d2 or C4d3 by immunofluorescence on frozen sections, or C4d > 0 by immunohistochemistry on paraffin sections).

    ii. At least moderate microvascular inflammation ([glomerulitis score, g + peritubular capillaritis score, ptc] ≥ 2) in the absence of recurrent or de novo glomerulonephritis, although in the presence of acute TCMR, borderline infiltrate, or infection, ptc ≥ 2 alone is not sufficient and g must be ≥ 1.

    NOTE: The local pathologist's diagnosis must be reviewed by a central pathologist to confirm eligibility for entry into the study. Biopsies with other histopathologic changes (eg, BKV nephropathy or recurrent glomerulonephritis) may be eligible if concurrent CABMR changes (as detailed above) are present and determined to be the predominant cause of renal dysfunction.

    1. Serologic evidence of circulating HLA DSA. NOTE: The local laboratory DSA results must be reviewed and confirmed by the central HLA reviewer during the screening period.
  4. Written informed consent obtained from subject (or legally acceptable representative) before any trial-related procedures.

    -

You CAN'T join if...

  1. Multi-organ transplant recipient (except for simultaneous kidney-pancreas or previous multiple kidney transplants) or cell transplant (islet, bone marrow, stem cell) recipient.
  2. Treatment for ABMR (including CABMR) or TCMR within 3 months prior to the start of screening with the exception of steroids.
  3. Received T cell depleting agents (e.g., alemtuzumab, anti-thymocyte globulin) within 3 months prior to the start of screening.
  4. Pregnant, breastfeeding, or unwillingness to practice adequate contraception.
  5. Active tuberculosis (TB) or history of active TB.
  6. History of human immunodeficiency virus (HIV) infection or positive for HIV.
  7. Seropositive for hepatitis B surface antigen (HBsAg)
  8. Hepatitis C virus (HCV) RNA positive.

Locations

  • UCLA Kidney Transplant Research Program
    Los Angeles California 90095 United States
  • University of California Davis Medical Center
    Sacramento California 95817 United States
  • University of California, San Francisco Medical Center
    San Francisco California 94143 United States
  • Kaiser Permanente
    San Francisco California 94118 United States
  • California Pacific Medical Center
    San Francisco California 94109 United States
  • Cedars-Sinai Medical Center
    Los Angeles California 90048 United States
  • California Institute of Renal Research
    San Diego California 92123 United States
  • Keck Medical Center Of USC
    Los Angeles California 90033 United States

Lead Scientist at University of California Health

  • Suphamai Bunnapradist (ucla)
    Professor of Clinical, Medicine. Authored (or co-authored) 212 research publications

Details

Status
in progress, not accepting new patients
Start Date
Completion Date
(estimated)
Sponsor
CSL Behring
ID
NCT03744910
Phase
Phase 3 research study
Study Type
Interventional
Participants
Expecting 350 study participants
Last Updated