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Antibody-mediated RejectionPhase 1/2NCT03380377

Clazakizumab for Chronic and Active Antibody Mediated Rejection Post-Kidney Transplant

A Phase 1/2 study testing Clazakizumab in people with Antibody-mediated Rejection and Kidney Transplant; Complications, run by Stanley Jordan, MD at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Antibody mediated rejection (ABMR) is a unique, significant and often severe form of allograft rejection. This single center, phase I/II, open label single-arm exploratory study focuses on enrolling ten patients with biopsy proven chronic antibody medicated rejection and/or donor specific antibody present at time of… Read more about this study

Who is it for?
Ages 15 to 75 years
What is being tested?
Clazakizumab
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
10 participants
Where
1 siteUnited States
Study dates
21 Feb 2018to 16 Apr 2024
Phase
Phase 1/2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 15 to 75 years
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Age 15-75 years at the time of screening.
  • Biopsy proven cABMR with TG on biopsy as defined by Banff 2015 and DSA positive at time of biopsy
  • Subject/Parent/Guardian must be able to understand and provide informed consent.
  • Pneumococcal vaccinated
  • Negative tuberculin ppd result or negative Quantiferon TB gold

Who cannot join

  • Multi-organ transplant (e.g. kidney and pancreas)
  • eGFR < 30 mL/min/1.73m2
  • Advanced Transplant Glomerulopathy (CG3)
  • Previous allergic reactions to monoclonal antibodies.
  • Lactating or pregnant females.
  • Women of child-bearing age who are not willing or able to practice FDA-approved forms of contraception during study and for 5 months after last dose.
Show all 16Show fewer
  • HIV-positive subjects.
  • Subjects who test positive for HBV by HBVeAg/DNA or HCV infection [positive Anti-HCV (EIA) and confirmatory HCV RIBA].
  • Subjects with latent or active TB. Subjects must have negative Quantiferon TB gold test result.
  • Recent recipients of any licensed or investigational live attenuated vaccine(s) within two months of the screening visit j) A significantly abnormal general serum screening lab result defined as a WBC < 3.0 X 103/ml, a Hgb < 8.0 g/dL, a platelet count < 100 X 103/ml, an SGOT or SGPT > 3X upper limit normal
  • Individuals deemed unable to comply with the protocol.
  • Subjects with active CMV or EBV infection as defined by CMV-specific serology (IgG or IgM) and confirmed by quantitative PCR with or without a compatible illness.
  • Use of investigational agents within 4 weeks of participation.
  • History or active Inflammatory Bowel Disease or Diverticular Disease or gastrointestinal perforation
  • Recent infection (within past 6 weeks of screening) requiring any antibiotic use (oral, parenteral or topical).
  • Present or previous (within 5 years) malignancy except for basal cell carcinoma, fully excised squamous cell carcinoma of the skin or non-recurrent (within 5 years) cervical carcinoma-in-situ.

Trial locations and contacts

1 site in 1 country.

United States1 site
  • Norko Ammerman

    Los Angeles, California, 90048

Other trials in United States

About this study

Official title: A Phase I/II Trial to Evaluate the Safety and Tolerability of Clazakizumab (Anti-IL-6 Monoclonal) As an Agent to Eliminate Donor Specific HLA Antibodies and Improve Outcomes of Patients With Chronic & Active Antibody-Mediated Rejection Post-Kidney Transplantation

Antibody mediated rejection (ABMR) is a unique, significant and often severe form of allograft rejection. This single center, phase I/II, open label single-arm exploratory study focuses on enrolling ten patients with biopsy proven chronic antibody medicated rejection and/or donor specific antibody present at time of biopsy. Patients who qualify will be receiving clazakizumab (anti-IL6 monoclonal antibody) monthly x six doses. A protocol biopsy will be performed at 6 months and if improvement is seen, patients will continue another six doses for up to 12 months. For those completing 12 doses, there will be a 12 month protocol biopsy. For those who only received six doses, the next and last study visit will be at 12 months from enrollment. Total study duration is 12 months.

Read the detailed description

This is a single center, Phase I/II, open label single-arm exploratory study. The trial will primarily examine the safety and tolerability of clazakizumab given after the diagnosis of cABMR in 10 subjects (15-75yrs) who exhibit DSAs to their donor. Patients entered will also have been diagnosed with cABMR + TG post-transplant based on Banff 2015 criteria. Patients are required to have a eGFR > 30 mL/min/1.73m2 as calculated by the MDRD equation (Schwartz equation will be used to estimate CrCl for patients under 18 years of age) at entry. All patients will be recruited from the renal transplant program at Cedars-Sinai Medical Center. Once cABMR is diagnosed, donor-specific anti-HLA antibodies will be assessed (DSA) which are associated with cABMR and/or graft loss. DSA will be detected using solid phase assay systems currently utilized at the Cedars-Sinai Medical Center HLA Laboratory (Dr. Xiaohai Zhang Director, Phone: 310-423-4979)41. These anti-HLA antibodies may result naturally or from previous pregnancy, transfusions, or prior transplants. Patients treated with clazakizumab for cABMR will have labs for DSAs, and other monitoring labs as well as immunologic studies as outlined. In addition to the standard post-transplant immunosuppressive protocol, patients with cABMR will receive clazakizumab 25mg SC given every 4 weeks (30 days) for a total of 6 doses. If no safety/tolerability/efficacy issues are observed after the initial dose, patients will continue the protocol as outlined. A protocol biopsy will be performed after the 6th and after the 12th doses of clazakizumab to assess the allograft for evidence of cABMR/ABMR, including C4d staining and TG using Banff 2015 criteria14. Banff scoring will be compared between the index and protocol biopsy after cessation of therapy. Patients who have evidence of persistent allograft dysfunction may have non-protocol biopsies for cause. After completion of the clazakizumab therapy, patients will be followed up to assess allograft function and ABMR episodes as well as DSAs. The protocol is summarized in figure 14 below. Monitoring of Treg, Th17, Tfh and plasmablast as well as IL-6, and CRP levels will be performed in the Transplant Immunology Lab at Cedars-Sinai Medical Center at select time points (Dr. Mieko Toyoda Director, Phone: 310-423-8282). confirmation) they will continue monthly clazakizumab for an additional 6 months and will have a second biopsy at 12 month protocol. Immunologic and viral monitoring labs will be performed as indicated.

The subjects will be followed to determine if the use of clazakizumab for treatment of cABMR in this high-risk transplant population is safe and without infectious risks. In addition, the investigators will determine the effects of clazakizumab treatment on renal biopsy assessments performed at 6 months. Assessments of renal function, donor specific antibody, and Banff 2015 biopsy scores will be evaluated at that time. If improvement or stabilization observed, clazakizumab will be resumed monthly x 6 doses (starting day 180 to day 330) and last study visit will be day 365 with biopsy. Study investigators will assess the transplanted patients to determine the number who sustain a viable and functioning kidney allograft as well. In the event a patient does not show improvement after receiving 6 doses of clazakizumab, no further treatment will be given and the patient will return at Day 365 for a final study visit. All subjects will be evaluated on an intent-to-treat basis. The subject accrual rate will be limited to no more than 1-2 subjects per month in the initial three months to assure safety to all subjects. Repeat laboratories will be performed at the completion of clazakizumab therapy to determine effect on levels and correlation with any potential events.

Long term dosing option at conclusion of 12 months (after Study Day 365 visit) will be available for those patients who complete the 12 month protocol. Patients may continue to receive clazakizumab 25 mg subQ every 8 weeks long term, per PI discretion.

Being tested
Clazakizumab
Keywords
kidney transplant, Chronic antibody mediated rejection, donor specific antibody

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ClazakizumabDrug

    Clazakizumab 25 mg subcutaneous monthly x 6 doses (or max of 12 doses) will be given to patients who are enrolled in this clinical trial.

Study groups in NCT03380377
Study groupRoleWhat they receive
Clazakizumab (Anti-IL-6 Monoclonal)ExperimentalAll ten patients will be receiving clazakizumab (Anti-IL-6 Monoclonal) monthly for six months. Then patients will be scheduled for six month protocol biopsy. If biopsy and all clinical labs show benefit or stability (up to PI discretion), patients will continue receiving clazakizumab monthly for another six months. All patients completing twelve doses of clazakizumab will be scheduled for a twelve month protocol biopsy and last study visit. If at the 6 month protocol biopsy, no improvement was seen, PI will have patient come for their last study visit on month 12 post enrollment.
Receives: Drug: Clazakizumab

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Participants With Donor Specific Antibody (DSA) Elimination or Reduction Based on Luminex HLA Testing

    Did clazakizumab eliminate or weaken donor specific antibody (DSA) mean fluorescence intensity (MFI) intensities? HLA antibodies were detected by the single antigen bead-based assay (One lambda, Los Angeles, CA). Donor HLA-specific antibodies were assessed throughout clazakizumab treatment for the first year. Detection of DSAs were only reported with MFI >2500.

    Measured: 12 months

  2. Number of Participants With Stabilization of Clinical Features of cABMR Via BANFF Biopsy Grading Criteria.

    Does clazakizumab help stabilize pathologic features of antibody mediated rejection at 6 month protocol biopsies? Protocol kidney allograft biopsies were performed at 6 months and compared to the baseline biopsy which was assessed for study inclusion. Biopsy specimens were analyzed according to Banff 2017 classification.

    Measured: 6 months

Secondary outcomes (2)
  1. Stabilization in Estimated Glomerular Filtration Rate (eGFR)

    Serum creatinine (mg/dl) collected to calculate eGFR

    Measured: 12 months

  2. Incidence of Treatment-related Adverse Events

    Adverse event monitoring in our patient population; did patients have treatment related adverse events and if so, how many events

    Measured: 12 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted21 Dec 2017
  2. Study start21 Feb 2018
  3. Primary completion16 Apr 2024
  4. Study completion16 Apr 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1/2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Model description
All ten patients enrolled will receive study medication (Clazakizumab, Vitaeris, Inc, Vancouver, Canada, B.C)
Masking
None (open label)
Enrolment
10 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03380377
Sponsor's protocol ID
134733
Status last verified
Apr 2025
First submitted
3 Aug 2017
Last updated
6 May 2025
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No

Publications

  • Choi J, Aubert O, Vo A, Loupy A, Haas M, Puliyanda D, Kim I, Louie S, Kang A, Peng A, Kahwaji J, Reinsmoen N, Toyoda M, Jordan SC. Assessment of Tocilizumab (Anti-Interleukin-6 Receptor Monoclonal) as a Potential Treatment for Chronic Antibody-Mediated Rejection and Transplant Glomerulopathy in HLA-Sensitized Renal Allograft Recipients. Am J Transplant. 2017 Sep;17(9):2381-2389. doi: 10.1111/ajt.14228. Epub 2017 Mar 10.

    PubMed 28199785

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing Clazakizumab in people with Antibody-mediated Rejection and Kidney Transplant; Complications, run by Stanley Jordan, MD at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 16 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 6 May 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 6 May 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Participants With Donor Specific Antibody (DSA) Elimination or Reduction Based on Luminex HLA Testing (time frame: 12 months). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03380377, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 May 2025; AzTrials last refreshed its copy on 6 Nov 2026.

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