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A Study of Mezagitamab in Adults With Late Antibody-Mediated Rejection (AMR) After a Kidney Transplant

2 giugno 2026 aggiornato da: Takeda

A Double-Blind, Placebo-Controlled, Multicenter, Randomized, Phase 2 Trial to Evaluate the Safety and Efficacy of Mezagitamab (TAK-079) in Kidney Transplant Recipients With Late Antibody-Mediated Rejection (AMR)

Antibody-mediated rejection (AMR) is a major cause of worsening kidney function after a kidney transplant (kidney allograft dysfunction) and can lead to kidney failure. AMR happens when the kidney recipient's immune system makes antibodies that attack the donor kidney. Antibodies are proteins made by the immune system to recognize foreign cells. Over time, this attack can damage kidney tissue and cause the transplant to fail. Because AMR can be serious, there is a need for treatments that are safe, work well, and are supported by good evidence.

The main aim of this study is to find out how safe mezagitamab is and how well adults with AMR tolerate it compared with placebo. A placebo looks like medicine but has no active ingredients. The study will also look at whether mezagitamab helps to control inflammation in the transplanted kidney and helps keep kidney function stable, compared with placebo.

Participants will be placed by chance in 1 of the 3 treatment groups in equal numbers. Two groups will receive mezagitamab in two different doses. One group will receive placebo. This means that out of every 3 participants, 2 will receive mezagitamab and 1 will receive placebo.

During the study, participants will visit their study clinic several times.

Panoramica dello studio

Stato

Non ancora reclutamento

Condizioni

Intervento / Trattamento

Tipo di studio

Interventistico

Iscrizione (Stimato)

36

Fase

  • Fase 2

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Adulto
  • Adulto più anziano

Accetta volontari sani

No

Descrizione

Key inclusion criteria:

  1. The participant aged 18 to 80 years.
  2. The participant must have a biopsy-confirmed diagnosis of active or chronic active late AMR (defined as greater than [>] 6 month after kidney transplant) without concurrent definitive TCMR (Grade 1a and above) as defined by the 2022 Banff classification.
  3. Biopsy within 30 days prior to screening, or performed during screening period within protocol-defined window.
  4. If the participant has received treatment for rejection, then the repeat biopsy and donor specific antibody (DSA) testing must have been performed at least 6 weeks after stopping the treatment.
  5. The participant with either human leukocyte antigen (HLA) class I and/or II DSA.
  6. eGFR > 30 milliliters per minute per 1.73 square meters (mL/min/1.73m^2).

Key exclusion criteria:

  1. The participant has blood type A, B, AB, or O (ABO) incompatible transplant.
  2. The participant has a history of multiple organ transplants, including en bloc and dual kidney transplants.
  3. Participant likely to require renal replacement therapy within the subsequent 30 days.
  4. Participants who have received an anti-cluster of differentiation 38 (CD38) therapy in the last 1 year or have past history of failing to achieve AMR resolution despite treatment with an anti-CD38 therapy.
  5. The participant has received any previous treatment with other immunosuppressant or immunomodulatory therapy:

    a) Within 6 months of signing the informed consent form (ICF) as listed below:

    • Complement system inhibitors (such as, eculizumab).
    • Proteasome inhibitors (such as, bortezomib).
    • Interleukin-6 (IL-6)/IL-6R antibody (such as, tocilizumab).
    • Anti-cluster of differentiation 20 (CD20) antibody (such as, rituximab). b) Within 6 weeks of signing the ICF as listed below:
    • Intravenous immunoglobulin (IVIG) or subcutaneous immunoglobulin (SCIG) or plasmapheresis
  6. The participant has active infection with hepatitis B virus, hepatitis C virus (HCV), or human immunodeficiency virus (HIV).
  7. Participant with serious infection within 2 weeks or with opportunistic infection within 2 months prior to signing ICF. Participant with active or untreated tuberculosis, or those with high suspicion of tuberculosis are also excluded.
  8. History of malignancy (including myelodysplastic syndrome) within 5 years of signing the ICF, except for adequately treated non-melanoma skin cancer, superficial bladder cancer, and curatively treated cervical carcinoma-in-situ.

Key Note: Other protocol specified inclusion and exclusion criteria apply.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Quadruplicare

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: Arm A: Mezagitamab + Placebo
Participants will receive mezagitamab up to Week 24, followed by placebo up to Week 48, followed by an observation period up to Week 70.
Mezagitamab subcutaneous (SC) injection.
Altri nomi:
  • TAK-079
Mezagitamab-matching placebo SC injection.
Sperimentale: Arm B: Mezagitamab
Participants will receive mezagitamab up to Week 48, followed by an observation period up to Week 70.
Mezagitamab subcutaneous (SC) injection.
Altri nomi:
  • TAK-079
Comparatore attivo: Arm C: Placebo
Participants will receive placebo up to Week 48, followed by an observation period up to Week 70.
Mezagitamab-matching placebo SC injection.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Arms A, B, and C: Number of Participants With Treatment-Emergent Adverse Events (TEAEs)
Lasso di tempo: Up to Week 70
An adverse event (AE) is any untoward medical occurrence in a clinical trial participant, temporally associated with the use of the trial intervention, whether or not the occurrence is considered related to the trial intervention. An AE can be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of the trial intervention. TEAEs are defined as AEs with start dates at the time of or following the first exposure to investigational medicinal product (IMP).
Up to Week 70
Arms A, B, and C: Number of Participants With Related TEAEs
Lasso di tempo: Up to Week 70
A related AE is an AE that is considered related to the IMP. Related TEAEs are defined as related AEs with start dates at the time of or following the first exposure to IMP.
Up to Week 70
Arms A, B, and C: Number of Participants With Serious Adverse Events (SAEs)
Lasso di tempo: Up to Week 70
An SAE is any untoward medical occurrence that results in death, is life threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity or is a congenital anomaly/birth defect.
Up to Week 70
Arms A, B, and C: Number of Participants With AEs of Special Interest
Lasso di tempo: Up to Week 70
AEs of special interest are AEs that are considered specific to the IMP.
Up to Week 70
Arms A, B, and C: Number of Participants With AE Leading to Treatment Discontinuation
Lasso di tempo: Up to Week 70
Up to Week 70
Arms A, B, and C: Number of Participants With Clinically Significant Abnormal Laboratory Test Results and Vital Signs
Lasso di tempo: Up to Week 70
Up to Week 70

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Arms A, B, and C: Percentage of Participants With Achievement of Biopsy-Proven Histologic Resolution of AMR Activity at Weeks 24 and 48
Lasso di tempo: Weeks 24 and 48
Achievement of biopsy-proven histological resolution of AMR activity will be assessed by the 2022 Banff classification criteria. The Banff 2022 Classification provides a standardized framework for evaluating kidney transplant biopsies using lesion scoring.
Weeks 24 and 48
Arms A, B, and C: Microvascular Inflammation (MVI) Score in Biopsy Samples at Weeks 24 and 48
Lasso di tempo: Weeks 24 and 48
MVI is an important marker of allograft loss and is defined as the sum of glomerulitis and peritubular capillaritis scores (g+ptc) on kidney histology.
Weeks 24 and 48
Arms A, B, and C: Percentage of Participants Who Achieve a MVI Score of 0 at Weeks 24 and 48
Lasso di tempo: Weeks 24 and 48
Weeks 24 and 48
Arms A, B, and C: Change From Baseline in MVI score at Weeks 24 and 48
Lasso di tempo: Baseline, Weeks 24 and 48
Baseline, Weeks 24 and 48
Arms A, B, and C: Change From Baseline in Estimated Glomerular Filtration Rate (eGFR) at Weeks 24, 48 and 70
Lasso di tempo: Baseline, Weeks 24, 48 and 70
eGFR is a measure of kidney function calculated from serum creatinine using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation.
Baseline, Weeks 24, 48 and 70
Arms A, B, and C: Change From Baseline in Donor-Derived Cell-Free DNA (dd-cfDNA) at Weeks 24, 48 and 70
Lasso di tempo: Baseline, Weeks 24, 48 and 70
dd-cfDNA are DNA fragments released from injured donor cells. It serves as a noninvasive, quantitative method that reflects allograft injury and is associated with AMR activity in kidney transplant recipients.
Baseline, Weeks 24, 48 and 70
Arms A, B, and C: Change From Baseline in Urine Protein Creatinine Ratio (UPCR) at Weeks 24, 48 and 70
Lasso di tempo: Baseline, Weeks 24, 48 and 70
UPCR is a measure of protein excretion calculated from a urine sample, as the ratio of urine protein to creatinine, and used to assess kidney function.
Baseline, Weeks 24, 48 and 70
Arm B: Percentage of Participants With Achievement of Biopsy-Proven Histologic Resolution of AMR Activity at Week 70
Lasso di tempo: Week 70
Week 70
Arm B: MVI Score in Biopsy Samples at Week 70
Lasso di tempo: Week 70
Week 70
Arm B: Percentage of Participants Who Achieve a MVI Score of 0 at Week 70
Lasso di tempo: Week 70
Week 70
Arm B: Change From Baseline in MVI score at Week 70
Lasso di tempo: Week 70
Week 70
Arms A, B, and C: Percentage of Participants With T-Cell Mediated Rejection (TCMR) by Biopsy at Weeks 24 and 48
Lasso di tempo: Weeks 24 and 48
Weeks 24 and 48
Arm B: Percentage of Participants With TCMR by Biopsy at Week 70
Lasso di tempo: Week 70
Week 70
Arms A and B: Serum Concentration of Mezagitamab
Lasso di tempo: Pre-dose and at multiple time points post-dose up to Week 70
Pre-dose and at multiple time points post-dose up to Week 70
Arms A, B and C: Number of Participants With Anti-Drug Antibody
Lasso di tempo: Pre-dose and at multiple time points post-dose up to Week 70
Pre-dose and at multiple time points post-dose up to Week 70
Arms A, B and C: Number of Participants With Neutralizing Antibody
Lasso di tempo: Pre-dose and at multiple time points post-dose up to Week 70
Pre-dose and at multiple time points post-dose up to Week 70

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Investigatori

  • Direttore dello studio: Study Director, Takeda

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Stimato)

1 settembre 2026

Completamento primario (Stimato)

15 gennaio 2029

Completamento dello studio (Stimato)

15 gennaio 2029

Date di iscrizione allo studio

Primo inviato

22 maggio 2026

Primo inviato che soddisfa i criteri di controllo qualità

22 maggio 2026

Primo Inserito (Effettivo)

29 maggio 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

4 giugno 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

2 giugno 2026

Ultimo verificato

1 giugno 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • TAK-079-2002
  • 2026-526239-20-00 (Ctis)

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

Descrizione del piano IPD

Takeda provides access to the de-identified individual participant data (IPD) for eligible studies to aid qualified researchers in addressing legitimate scientific objectives (Takeda's data sharing commitment is available on https://clinicaltrials.takeda.com/takedas-commitment?commitment=5). These IPDs will be provided in a secure research environment following approval of a data sharing request, and under the terms of a data sharing agreement.

Criteri di accesso alla condivisione IPD

IPD from eligible studies will be shared with qualified researchers according to the criteria and process described on https://vivli.org/ourmember/takeda/. For approved requests, the researchers will be provided access to anonymized data (to respect patient privacy in line with applicable laws and regulations) and with information necessary to address the research objectives under the terms of a data sharing agreement.

Tipo di informazioni di supporto alla condivisione IPD

  • STUDIO_PROTOCOLLO
  • LINFA
  • ICF
  • RSI

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

prodotto fabbricato ed esportato dagli Stati Uniti

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

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