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

2. Juni 2026 aktualisiert von: 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.

Studienübersicht

Status

Noch keine Rekrutierung

Bedingungen

Intervention / Behandlung

Studientyp

Interventionell

Einschreibung (Geschätzt)

36

Phase

  • Phase 2

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Nein

Beschreibung

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.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Vervierfachen

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: 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.
Andere Namen:
  • TAK-079
Mezagitamab-matching placebo SC injection.
Experimental: Arm B: Mezagitamab
Participants will receive mezagitamab up to Week 48, followed by an observation period up to Week 70.
Mezagitamab subcutaneous (SC) injection.
Andere Namen:
  • TAK-079
Aktiver Komparator: 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.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Arms A, B, and C: Number of Participants With Treatment-Emergent Adverse Events (TEAEs)
Zeitfenster: 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
Zeitfenster: 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)
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: Up to Week 70
Up to Week 70

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Arms A, B, and C: Percentage of Participants With Achievement of Biopsy-Proven Histologic Resolution of AMR Activity at Weeks 24 and 48
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: Weeks 24 and 48
Weeks 24 and 48
Arms A, B, and C: Change From Baseline in MVI score at Weeks 24 and 48
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: Week 70
Week 70
Arm B: MVI Score in Biopsy Samples at Week 70
Zeitfenster: Week 70
Week 70
Arm B: Percentage of Participants Who Achieve a MVI Score of 0 at Week 70
Zeitfenster: Week 70
Week 70
Arm B: Change From Baseline in MVI score at Week 70
Zeitfenster: 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
Zeitfenster: Weeks 24 and 48
Weeks 24 and 48
Arm B: Percentage of Participants With TCMR by Biopsy at Week 70
Zeitfenster: Week 70
Week 70
Arms A and B: Serum Concentration of Mezagitamab
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Ermittler

  • Studienleiter: Study Director, Takeda

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Geschätzt)

1. September 2026

Primärer Abschluss (Geschätzt)

15. Januar 2029

Studienabschluss (Geschätzt)

15. Januar 2029

Studienanmeldedaten

Zuerst eingereicht

22. Mai 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

22. Mai 2026

Zuerst gepostet (Tatsächlich)

29. Mai 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

4. Juni 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

2. Juni 2026

Zuletzt verifiziert

1. Juni 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Schlüsselwörter

Andere Studien-ID-Nummern

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

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

JA

Beschreibung des IPD-Plans

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.

IPD-Sharing-Zugriffskriterien

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.

Art der unterstützenden IPD-Freigabeinformationen

  • STUDIENPROTOKOLL
  • SAFT
  • ICF
  • CSR

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Ja

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

Produkt, das in den USA hergestellt und aus den USA exportiert wird

Ja

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .

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