Tato stránka byla automaticky přeložena a přesnost překladu není zaručena. Podívejte se prosím na anglická verze pro zdrojový text.

Prevence vaskulopatie srdečního aloštěpu pomocí terapie rituximabem (Rituxan) při transplantaci srdce

Prevence vaskulopatie srdečního aloštěpu pomocí terapie rituximabem (Rituxan) při transplantaci srdce (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.

Přehled studie

Postavení

Ukončeno

Podmínky

Intervence / Léčba

Detailní popis

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.

Typ studie

Intervenční

Zápis (Aktuální)

362

Fáze

  • Fáze 2

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní místa

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

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

18 let až 75 let (Dospělý, Starší dospělý)

Přijímá zdravé dobrovolníky

Ne

Pohlaví způsobilá ke studiu

Všechno

Popis

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.

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Prevence
  • Přidělení: Randomizované
  • Intervenční model: Paralelní přiřazení
  • Maskování: Čtyřnásobek

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: Rituximab

Rituximab induction/conventional immunosuppression

Komparátor placeba: Rituximab Placebo

Rituximab Placebo / conventional immunosuppression

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Change in Percent Atheroma Volume (PAV)
Časové okno: 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

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Death
Časové okno: 12 months

Participants who died within 12 months post-transplant

12 months
Re-transplantation or Re-listed for Transplantation
Časové okno: 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
Časové okno: 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)
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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)
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Spolupracovníci

Vyšetřovatelé

  • Vrchní vyšetřovatel: Mohamed Sayegh, MD, Brigham and Women's Hospital/Harvard
  • Studijní židle: Anil Chandraker, MD, Brigham and Women's Hospital/Harvard
  • Studijní židle: Randall Starling, MD, The Cleveland Clinic

Publikace a užitečné odkazy

Osoba odpovědná za zadávání informací o studiu tyto publikace poskytuje dobrovolně. Mohou se týkat čehokoli, co souvisí se studiem.

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia

1. září 2011

Primární dokončení (Aktuální)

1. října 2015

Dokončení studie (Aktuální)

1. října 2015

Termíny zápisu do studia

První předloženo

16. ledna 2011

První předloženo, které splnilo kritéria kontroly kvality

16. ledna 2011

První zveřejněno (Odhadovaný)

19. ledna 2011

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

24. září 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

22. září 2026

Naposledy ověřeno

1. září 2026

Více informací

Termíny související s touto studií

Další relevantní podmínky MeSH

Další identifikační čísla studie

  • DAIT CTOT-11

Tyto informace byly beze změn načteny přímo z webu clinicaltrials.gov. Máte-li jakékoli požadavky na změnu, odstranění nebo aktualizaci podrobností studie, kontaktujte prosím register@clinicaltrials.gov. Jakmile bude změna implementována na clinicaltrials.gov, bude automaticky aktualizována i na našem webu .