Denne siden ble automatisk oversatt og nøyaktigheten av oversettelsen er ikke garantert. Vennligst referer til engelsk versjon for en kildetekst.

Forebygging av kardial allograft vaskulopati ved bruk av rituximab (Rituxan) terapi ved hjertetransplantasjon

Forebygging av kardial allograft vaskulopati ved bruk av rituximab (Rituxan) terapi ved hjertetransplantasjon (CTOT-11)

All people who have a heart transplant are at risk for developing cardiac allograft vasculopathy (CAV). CAV means narrowing of the heart transplant vessels, which is associated with poor heart transplant function. People who develop antibodies after transplant have a higher risk of developing CAV. Infections, high cholesterol, and rejection also increase the risk of developing CAV. People who develop CAV usually have to receive another transplant.

Studieoversikt

Status

Avsluttet

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

The purpose of this research study is to see if a study drug called rituximab (Rituxan®) prevents CAV. Rituximab destroys certain types of white blood cells called B cells. B cells are important cells in the immune system that help the body fight infection by producing substances called antibodies. B cells and the antibodies they produce are also involved in some kinds of rejection after organ transplantation. Rituximab decreases the number of B cells in the blood and other tissues. The goal of this study is to determine if decreasing B cells with Rituximab can prevent injury to the transplanted heart.

Studietype

Intervensjonell

Registrering (Faktiske)

362

Fase

  • Fase 2

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

    • California
      • Beverly Hills, California, Forente stater, 90211
        • Cedars Sinai Heart Institute
      • Los Angeles, California, Forente stater, 90095
        • Ronald Regan UCLA Medical Center
      • Palo Alto, California, Forente stater, 94304
        • Stanford University/Palo Alto VA
      • San Francisco, California, Forente stater, 94143-0124
        • University of California San Francisco
      • Stanford, California, Forente stater, 94305
        • Stanford University
    • Illinois
      • Chicago, Illinois, Forente stater, 60611
        • Northwestern University
    • Maryland
      • Baltimore, Maryland, Forente stater, 21201
        • University of Maryland
    • Massachusetts
      • Boston, Massachusetts, Forente stater, 02115
        • Brigham and Women's Hospital
      • Boston, Massachusetts, Forente stater, 02114
        • Massachusetts General Hospital
      • Boston, Massachusetts, Forente stater, 02111
        • Tufts Medical Center
    • Minnesota
      • Minneapolis, Minnesota, Forente stater, 55455
        • University of Minnesota
      • Minneapolis, Minnesota, Forente stater, 55407
        • Minneapolis Heart Institute
    • New York
      • New York, New York, Forente stater, 10029
        • Mount Sinai School of Medicine
      • New York, New York, Forente stater, 10032'
        • Columbia University Medical Center
    • Ohio
      • Cleveland, Ohio, Forente stater, 44195
        • Cleveland Clinic Foundation
    • Pennsylvania
      • Philadelphia, Pennsylvania, Forente stater, 19104
        • University of Pennsylvania
      • Philadelphia, Pennsylvania, Forente stater, 19102
        • Drexel University College of Medicine
      • Pittsburgh, Pennsylvania, Forente stater, 15212
        • Allegheny General Hospital
    • South Carolina
      • Charleston, South Carolina, Forente stater, 29425
        • Medical University of South Carolina
    • Texas
      • Dallas, Texas, Forente stater, 75230
        • Medical City Dallas Hospital/CRSTI
      • Houston, Texas, Forente stater, 77030
        • The Methodist Hospital
    • Utah
      • Murray, Utah, Forente stater, 84157
        • Intermountain Medical Center
      • Salt Lake City, Utah, Forente stater, 84132-2401
        • University of Utah
    • Wisconsin
      • Madison, Wisconsin, Forente stater, 53792
        • University of Wisconsin

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 75 år (Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria for Initial Enrollment:

  • Subject must be able to understand and provide informed consent;
  • Male or Female, 18 to 75 years of age;
  • Candidate for a primary heart transplant (e.g., listed for heart transplant only);
  • Historical panel reactive antibodies (PRA) less than 30%;
  • Calculated GFR ≥ 40 mL/minute using the Chronic Kidney Disease Epidemiology Collaboration equation (CKD-EPI);
  • Female and male subjects with reproductive potential, must agree to use FDA approved methods of birth control for the duration of the study

Inclusion Criteria for Randomization / Post-transplant:

--Negative PRA within 12 weeks prior to transplant (Local HLA Center Testing) using one of the following:

  • One Lambda's LABScreen® Mixed Class I & II (presence or absence), or
  • Less than 10% by One Lambda's LABScreen® PRA Class I and II with an MFI of <2000, or
  • Calculated panel reactive antibodies (cPRA) less than 10% by LABScreen® Single Antigen testing (Anti-HLA-A, -B, -DR, -DQ). The antigens reported will include those with an MFI >2000.

The Luminex Gen-Probe beads are equivalent to the One Lambda and may be used as an alternative;

  • Calculated GFR ≥ 40mL/minute using the CKD-EPI at time of randomization;
  • Serum immunoglobulin G (IgG) level greater than 500mg/dL within 90 days prior to randomization;
  • Negative test for HIV, HBsAg, HBcAb, and HCV Ab within 12 months prior to transplant. If documentation is not present to support that the testing was performed in the past 12 months, then a blood sample will be collected prior to transplant and sent for local testing. Results may be available after randomization. If positive result, the oversight committee will review the case and provide further recommendations.
  • Female subjects of childbearing potential must have a negative pregnancy test.

Exclusion Criteria for Enrollment:

  • Prior history of organ transplantation;
  • Previous treatment with Rituximab (MabThera® / Rituxan ®);
  • Transplant physician intention to use any induction agents;
  • History of severe allergic anaphylactic reactions to humanized or murine monoclonal antibodies;
  • History of severe reaction to previous therapy with IVIG;
  • Active systemic infection at time of enrollment;
  • Any history of serologic positivity to HIV, HBsAg, HBcAb, and HCV Ab;
  • History of less than 5 years remission of malignancy. Any history of adequately treated in-situ cervical carcinoma, or adequately treated basal or squamous cell carcinoma of the skin will be permitted;
  • Any condition that, in the opinion of the investigator, would interfere with the subject's ability to comply with study requirements;
  • Use of other investigational drugs within 4 weeks of enrollment;
  • Currently breast-feeding or plans to become pregnant during the timeframe of the study follow-up period.

Exclusion Criteria for Randomization/Post-transplant:

  • Recipient of multiple solid organ or tissue transplants;
  • Previous treatment with Rituximab (MabThera® / Rituxan ®);
  • Use of any induction agents;
  • History of severe allergic anaphylactic reactions to humanized or murine monoclonal antibodies;
  • History of severe reaction to previous therapy with IVIG; Lack of IV venous access;
  • Active systemic infection at time of randomization;
  • Any history of serologic positivity to HIV, HBsAg, HBcAb and HCV Ab;
  • Any condition that, in the opinion of the investigator, would interfere with the subject's ability to comply with study requirements;
  • Use of other investigational drugs within 4 weeks prior to randomization;
  • Receipt of a live vaccine within 30 days prior to randomization;
  • Currently breast-feeding or plans to become pregnant during the timeframe of the study follow-up period.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Forebygging
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Firemannsrom

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: Rituximab

Rituximab induction/conventional immunosuppression

Placebo komparator: Rituximab Placebo

Rituximab Placebo / conventional immunosuppression

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Change in Percent Atheroma Volume (PAV)
Tidsramme: Baseline, 1 year

Nominal or noticeable change, bad or good, from baseline to 1 year in percent atheroma volume (PAV) which is a measure of the degree of coronary arterial obstruction due to host alloimmune processes measured by intravascular ultrasound (IVUS) in a target coronary artery. Thus a decrease in PAV would be an indicator of less obstruction and a better outcome.

Baseline, 1 year

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
Death
Tidsramme: 12 months

Participants who died within 12 months post-transplant

12 months
Re-transplantation or Re-listed for Transplantation
Tidsramme: 6 to 12 months

Re-transplantation is defined as the receipt of a subsequent heart transplant and re-listed for transplantation is being listed back on the heart transplant list to be re-transplanted.

6 to 12 months
Number of Episodes of Biopsy Proven Acute Rejection (BPAR) of Any Grade Per Participant
Tidsramme: 6 to 12 months

The number of times a participant experienced biopsy proven acute rejection (BPAR). Biopsy proven acute rejection is when an examination of tissue removed from the transplanted organ indicates that the subject's immune system is trying to reject the graft. BPAR was defined as a biopsy that met the International Society for Heart & Lung Transplantation (ISHLT) criteria to be graded as 1R or greater rejection and was determined by a single, central pathology laboratory.

6 to 12 months
Incidence of BPAR (Any Grade)
Tidsramme: 6 to 12 months

The number of subjects who experienced any grade of biopsy proven acute rejection (BPAR) within the clinical trial. Biopsy proven acute rejection is when an examination of tissue removed from the transplanted organ indicates that the subject's immune system is trying to reject the graft. BPAR was defined as a biopsy which met The International Society for Heart & Lung Transplantation (ISHLT) criteria to be graded as 1R or greater rejection and was determined by a single, central pathology laboratory.

6 to 12 months
Incidence of AMR
Tidsramme: 6 to 12 months

The number of participants who experienced antibody- mediated rejection (AMR). Antibody-mediated rejection (AMR) occurs when the subject develops antibodies directed against the transplanted heart. This was assessed based on local pathology biopsy reads.

6 to 12 months
Incidence of Cellular Rejection
Tidsramme: 6 to 12 months

Cellular Rejection refers to the organ recipient's immune system recognizing a transplanted organ as foreign and mounting a response to it via cellular mechanisms. Cellular rejection was defined as a biopsy which met The International Society for Heart & Lung Transplantation (ISHLT) criteria to be graded as 1R or greater rejection and was determined by a single, central pathology laboratory

6 to 12 months
Incidence of Any Treated Rejection
Tidsramme: 6 to 12 months

The number of participants who were treated by their local physician for any type of rejection including, but not limited to cellular rejection and antibody- mediated rejection (AMR) of the transplanted heart regardless of the presence of a biopsy.

6 to 12 months
Number of Participants With Episodes of Rejection Associated With Hemodynamic Compromise (HDC)
Tidsramme: 6 to 12 months

The number of participants that experienced at least one episode of rejection associated with hemodynamic compromise (HDC). Rejection associated with HDC is when there is insufficient blood flow to the transplanted heart in association with acute rejection found in a biopsy. Local biopsies were used for this outcome measure.

6 to 12 months
Number of Participants With Development of Angiographically Evident Cardiac Allograft Vasculopathy
Tidsramme: 1 year

Cardiac allograft vasculopathy is an aggressive form of atherosclerosis that is characterized by the development of fibrosis affecting cardiac arteries that result in concentric narrowing of the arteries and, ultimately allograft failure. Development of cardiac allograft vasculopathy can be diagnosed via an angiograph which is an X-ray of the cardiac arteries by injecting a radiopaque substance such as iodine.

1 year
Number of Participants With Post-transplant Serious Infections Requiring Intravenous Antimicrobial Therapy
Tidsramme: Transplantation through end of study, up to 1 year post transplantation.

Number of participants experiencing at least one serious infection requiring intravenous antimicrobial therapy which is used to kill the growth of microorganisms such as bacteria, fungi, or protozoans.

Transplantation through end of study, up to 1 year post transplantation.
Number of Participants With Post-transplant Incidence of PTLD
Tidsramme: Transplantation through end of study, up to 1 year post transplantation.

The number of participants experiencing at least one post-transplant lymphoproliferative disorder (PTLD) occurrence during this trial. Post-transplant lymphoproliferative disorder is an uncontrolled proliferation of B cell lymphocytes latently infected with Epstein-Barr virus.

Transplantation through end of study, up to 1 year post transplantation.
Post-transplant Safety Outcomes Among Participants: Safety and Tolerability of Rituximab
Tidsramme: Transplantation through end of study, up to 1 year post transplantation

Defined as participants that experienced at least one adverse event that was possibly, probably, or definitely related to the study drug (i.e., Rituximab or Placebo). Serious adverse events were used to evaluate this endpoint and the attribution was based on the DAIT Medical Monitor's assessment.

Transplantation through end of study, up to 1 year post transplantation

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Samarbeidspartnere

Etterforskere

  • Hovedetterforsker: Mohamed Sayegh, MD, Brigham and Women's Hospital/Harvard
  • Studiestol: Anil Chandraker, MD, Brigham and Women's Hospital/Harvard
  • Studiestol: Randall Starling, MD, The Cleveland Clinic

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. september 2011

Primær fullføring (Faktiske)

1. oktober 2015

Studiet fullført (Faktiske)

1. oktober 2015

Datoer for studieregistrering

Først innsendt

16. januar 2011

Først innsendt som oppfylte QC-kriteriene

16. januar 2011

Først lagt ut (Antatt)

19. januar 2011

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

24. september 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

22. september 2026

Sist bekreftet

1. september 2026

Mer informasjon

Begreper knyttet til denne studien

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • DAIT CTOT-11

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .