Clazakizumab for Chronic and Active Antibody Mediated Rejection Post-Kidney Transplant
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|ClinicalTrials.gov Identifier: NCT03380377|
Recruitment Status : Active, not recruiting
First Posted : December 21, 2017
Last Update Posted : March 24, 2021
|Condition or disease||Intervention/treatment||Phase|
|Antibody-mediated Rejection Kidney Transplant; Complications Transplant Glomerulopathy Transplant Glomerulopathy - Late Form Transplant Glomerulopathy - Early Form Kidney Transplant Rejection||Drug: Clazakizumab||Phase 1 Phase 2|
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.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||10 participants|
|Intervention Model:||Single Group Assignment|
|Intervention Model Description:||All ten patients enrolled will receive study medication (Clazakizumab, Vitaeris, Inc, Vancouver, Canada, B.C)|
|Masking:||None (Open Label)|
|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|
|Actual Study Start Date :||February 21, 2018|
|Estimated Primary Completion Date :||December 31, 2022|
|Estimated Study Completion Date :||December 31, 2022|
Experimental: Clazakizumab (Anti-IL-6 Monoclonal)
All 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.
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.
- Donor specific antibody elimination based on luminex HLA testing [ Time Frame: 12 months ]Does clazakizumab eliminate or weaken donor specific antibodies intensities.
- Stabilization of clinical features of cABMR via BANFF biopsy grading criteria. [ Time Frame: 12 months ]Does clazakizumab help stabilize pathologic features of antibody mediated rejection at 6 month and 12 month protocol biopsies?
- Serum creatinine [ Time Frame: 12 months ]Serum creatinine (mg/dl) will be collected at multiple time points throughout the study to calculate eGFR
- Immunologic markers [ Time Frame: 12 months ]Immunologic markers collected at multiple time points throughout the study
- Incidence of treatment-related adverse events [ Time Frame: 12 months ]Adverse event monitoring, assessment of labs, monitoring of viral PCRs
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03380377
|United States, California|
|Los Angeles, California, United States, 90048|
|Principal Investigator:||Stanley Jordan, MD||Cedars-Sinai Medical Center Comprehensive Transplant Center|