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Reducing the Risk of Transplant Rejection: Simultaneous Kidney and Bone Marrow Transplant

Renal Allograft Tolerance Through Mixed Chimerism (ITN010ST)

This study will examine the safety and effectiveness of a combination kidney and bone marrow transplant from a relative with the same (or nearly the same) blood cell type as the transplant recipient. An investigational medication will be given prior to and after the transplant to help protect the transplanted kidney from attack by the body's immune system.

Studienübersicht

Detaillierte Beschreibung

Of the two currently available treatments for kidney failure, long-term dialysis and kidney transplantation, only kidney transplantation provides a potential cure. After a kidney transplant, the body's immune system recognizes the kidney as foreign and tries to attack and destroy it in a process called rejection. To avoid rejection, participants must take medications called immunosuppressants or anti-rejection drugs. It is believed that by transplanting bone marrow at the same time as a solid organ such as a kidney, a state of "mixed chimerism" (a mixing of the donor and recipient's immune system) can be achieved. Mixed chimerism may prevent rejection without the need for anti-rejection drugs.

Participants in this study will receive a simultaneous bone marrow and kidney transplant from the same living related donor in an attempt to establish mixed chimerism. Prior to transplantation, participants will undergo a "conditioning regimen" involving cyclophosphamide chemotherapy, radiation to the thymus gland, and four immunosuppressive medications: cyclosporine A, a man-made antibody known as rituximab to suppress B cells, a short course of steroids, and a T-cell depleting antibody known as MEDI-507. MEDI-507 is an investigational medication that has not been approved by the FDA. The primary goal of the study is to investigate the safety of the conditioning regimen and its ability to promote mixed chimerism so that the transplanted kidney is not destroyed. The study will also determine whether participants with mixed chimerism can eventually be safely removed from long-term immunosuppressive therapy following transplantation.

Participants will be assessed before and after transplantation and will be followed ≤36 months.

Studientyp

Interventionell

Einschreibung (Tatsächlich)

5

Phase

  • Phase 1

Kontakte und Standorte

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

Studienorte

    • Massachusetts
      • Boston, Massachusetts, Vereinigte Staaten, 02114
        • Massachusetts General Hospital

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

18 Jahre bis 55 Jahre (Erwachsene)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • End-stage renal disease (ESRD) without prior sensitization (defined as Panel Reactive Antibody [PRA] greater than 20%) within the 60 days prior to transplant as measured by cytotoxicity assays, ELISA, and flow cytometry;
  • Undergoing a first or second transplant;
  • Receiving a transplant from a living related donor who is ABO (blood type) compatible and haploidentical (3, 4, or 5 antigen match by serologic typing);
  • Cardiac ejection fraction greater than 40%;
  • Forced expiratory volume (FEV1) greater than 50%;
  • Liver function tests, bilirubin, and coagulation studies less than 2 X normal;
  • White blood cells greater than 2000/mm^3; abd
  • Platelets greater than 100,000/mm^3

Exclusion Criteria:

  • Positive donor lymphocyte cross-match;
  • HIV-1 infected;
  • Positive hepatitis B surface antigen (HbsAg);
  • Hepatitis C virus infected;
  • History of cancer;
  • Prior dose-limiting radiation therapy;
  • Pregnant, breastfeeding, or planning pregnancy within the time frame of the study;
  • Enrolled in another investigational drug study within 30 days prior to study entry; or
  • Receiving maintenance immunosuppression within 3 months before the conditioning regimen begins

Studienplan

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

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: N / A
  • Interventionsmodell: Einzelgruppenzuweisung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Conditioning Regimen

Cyclophosphamide intravenously (IV) on days -5 and -4 with respect to transplantation; MEDI-507 on days -1, 0, and 1 (after a test dose of 0.1 mg per kg on day -2); and cyclosporine A IV and thymic irradiation on day -1. Hemodialysis was performed before and 14 hours after each dose of cyclophosphamide.Kidney transplantation was followed by IV infusion of donor bone marrow. Oral cyclosporine A was administered daily postoperatively, with target trough blood levels of 250 to 350 ng per milliliter; the dose was tapered and discontinued over a period of several months.

Amendment applicable to the 4th and 5th participant: rituximab on days -7 and -2; and prednisone, 2 mg per kg per day starting on the day of transplantation with tapering over the next 10 days.

Cyclophosphamide 60 mg per kilogram (kg) of body weight per day intravenously (IV) on days -5 and -4 with respect to transplantation; humanized anti-CD2 monoclonal antibody (MEDI-507) 0.6 mg per kg on days -1, 0, and 1 (after test dose of 0.1 mg per kg on day -2); and cyclosporine A 5 mg per kg IV and thymic irradiation (700 cGy) on day -1. Hemodialysis was performed before and 14 hours after each dose of cyclophosphamide.Kidney transplantation was followed by IV infusion of donor bone marrow. Oral cyclosporine A was administered postoperatively, 8 to 12 mg per kg per day, with target trough blood levels of 250 to 350 ng per milliliter; the dose was tapered and discontinued over a period of several months. Protocol amendment that applied to participant 4 and 5: rituximab, 375 mg per square meter of body-surface area days -7 and -2; and prednisone, 2 mg per kg per day starting on the day of transplantation with tapering over the next 10 days.
Andere Namen:
  • nonmyeloablative preparative regimen

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Graft Survival Twenty-Four Months Post Transplantation
Zeitfenster: 24 months (2 Years) Post Transplantation
Defined by kidney transplant survival at month 24 post transplantation with successful withdrawal of cyclosporine following transplantation, in the absence of maintenance immunosuppression.
24 months (2 Years) Post Transplantation

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Participant Survival
Zeitfenster: Up to thirty-six months (3 Years) Post Transplantation
During the three-year post-transplant follow-up period for enrolled participants.
Up to thirty-six months (3 Years) Post Transplantation
Graft Survival
Zeitfenster: Up to thirty-six months (3 Years) Post Transplantation
During the three-year post-transplant follow-up period for enrolled participants.
Up to thirty-six months (3 Years) Post Transplantation
Change from Baseline in Renal Function Using Serum Creatinine
Zeitfenster: Up to thirty-six months (3 Years) Post Transplantation
Changes in serum creatinine levels from baseline through post transplantation follow-up period.
Up to thirty-six months (3 Years) Post Transplantation
Number of Episodes of Acute or Chronic Graft Versus Host Disease (GVHD)
Zeitfenster: From Week 1 through thirty-six months (3 Years) Post Transplantation
Evaluations for suspected GVHD, including biopsies as appropriate, during routine and/or for cause assessments.
From Week 1 through thirty-six months (3 Years) Post Transplantation
Number of Adverse Events
Zeitfenster: Participant enrollment through <=thirty-six months (3 Years) Post Transplantation
As defined by protocol.
Participant enrollment through <=thirty-six months (3 Years) Post Transplantation

Mitarbeiter und Ermittler

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

Ermittler

  • Hauptermittler: David H. Sachs, MD, Department of Medicine, Massachusetts General Hospital
  • Hauptermittler: A. Benedict Cosimi, MD, Department of Medicine, Massachusetts General Hospital

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

1. Juni 2003

Primärer Abschluss (Tatsächlich)

1. Januar 2009

Studienabschluss (Tatsächlich)

1. Juli 2009

Studienanmeldedaten

Zuerst eingereicht

7. Juli 2003

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

7. Juli 2003

Zuerst gepostet (Schätzen)

8. Juli 2003

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

27. Dezember 2017

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

22. Dezember 2017

Zuletzt verifiziert

1. Dezember 2017

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • DAIT ITN010ST
  • DAIT NKD03 (Andere Kennung: Immune Tolerance Network)

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