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Initial Treatment of Patients With Immune Thrombocytopenic Purpura (ITP^2)

2 de janeiro de 2014 atualizado por: HealthCore-NERI

Initial Treatment of Patients With Immune Thrombocytopenic Purpura: The ITP^2 Study

This study will compare treatment with 3 courses of high-dose dexamethasone versus treatment with prednisone, for patients recently diagnosed with immune thrombocytopenic purpura (ITP). The primary hypothesis is that patients treated with high-dose dexamethasone will obtain a more durable remission than patients treated with prednisone.

Visão geral do estudo

Status

Rescindido

Condições

Intervenção / Tratamento

Descrição detalhada

ITP is a common disorder associated with significant morbidity. For more than 40 years it has been recognized that this disorder was responsive to corticosteroid therapy. As corticosteroids are easily obtainable and inexpensive, they have become the standard first-line therapy for adult patients with newly-diagnosed ITP. Generally, patients are treated with prednisone at a dose of approximately 1 mg/kg, or 60 mg/day, and once a response is obtained the daily dosage is gradually tapered. While approximately 70% of patients treated in this manner respond initially, most will relapse as the corticosteroid dose is lowered; ultimately only 15-20% of patients achieve a complete or partial remission of their ITP at an "acceptable" dose of prednisone. Recently, several studies have suggested that the use of high dose corticosteroids, specifically pulse dexamethasone, may be a more efficacious initial therapy for ITP, capable of causing a higher initial response rate and a significantly longer duration of remission despite a shorter course of initial therapy.

This study will compare treatment with 3 courses of high-dose dexamethasone versus treatment with prednisone, for patients recently diagnosed with immune thrombocytopenic purpura (ITP). The primary hypothesis is that patients treated with high-dose dexamethasone will obtain a more durable remission than patients treated with standard oral corticosteroids. This may reflect the ability of high dose corticosteroids to eradicate a sensitive pathogenic lymphoid clone that may be transiently susceptible to aggressive immunosuppressive therapy early in the course of disease.

Tipo de estudo

Intervencional

Inscrição (Real)

8

Estágio

  • Fase 3

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Locais de estudo

  • Estados Unidos
    • Louisiana
      • New Orleans, Louisiana, Estados Unidos, 70112
        • Tulane University
    • Maryland
      • Baltimore, Maryland, Estados Unidos, 21201
        • University of Maryland
      • Baltimore, Maryland, Estados Unidos, 21287
        • Johns Hopkins Hospital
    • Massachusetts
      • Boston, Massachusetts, Estados Unidos, 02114
        • Massachusetts General Hospital
      • Boston, Massachusetts, Estados Unidos, 02115
        • Children's Hospital Boston
      • Boston, Massachusetts, Estados Unidos, 02115
        • Brigham & Women's Hospital
    • New York
      • New York, New York, Estados Unidos, 10021
        • Weill Medical College, Cornell University
    • North Carolina
      • Chapel Hill, North Carolina, Estados Unidos, 27514
        • University of North Carolina Hospitals
      • Durham, North Carolina, Estados Unidos, 27710
        • Duke University
    • Ohio
      • Cleveland, Ohio, Estados Unidos, 44106
        • Case Western Reserve University
      • Cleveland, Ohio, Estados Unidos, 44195
        • Cleveland Clinic Foundation
    • Oklahoma
      • Oklahoma City, Oklahoma, Estados Unidos, 73104
        • The University of Oklahoma Health Sciences Center
    • Pennsylvania
      • Philadelphia, Pennsylvania, Estados Unidos, 19104
        • Children's Hospital of Philadelphia
      • Philadelphia, Pennsylvania, Estados Unidos, 19104
        • University of Pennsylvania
      • Pittsburgh, Pennsylvania, Estados Unidos, 15213
        • University of Pittsburgh Presbyterian and Shadyside Hospital
    • Washington
      • Seattle, Washington, Estados Unidos, 98195
        • University of Washington Medical Center
    • Wisconsin
      • La Crosse, Wisconsin, Estados Unidos, 54601
        • Gundersen Clinic
      • Madison, Wisconsin, Estados Unidos, 53792
        • University of Wisconsin

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

15 anos e mais velhos (Filho, Adulto, Adulto mais velho)

Aceita Voluntários Saudáveis

Não

Gêneros Elegíveis para o Estudo

Tudo

Descrição

Inclusion Criteria:

  • Must meet criteria for a diagnosis of ITP as specified by ASH guidelines
  • Must be within 30 days after diagnosis of ITP at the time of randomization (diagnosis of ITP starts with first platelet count ≤ 100,000/μl)
  • Platelet count ≤ 30,000/μl at the time ITP is diagnosed, and/or at some time between the diagnosis of ITP and study entry
  • Platelet count ≤ 150,000/μl at the time of randomization
  • Age ≥ 15 years
  • If bone marrow examination is available, it must be compatible with ITP
  • Subjects, or their legal guardians, must have the ability to provide informed consent

Exclusion Criteria:

  • Rituximab therapy or splenectomy for ITP or for any other cause within the previous 8 weeks.
  • Known HIV infection
  • Known HCV infection
  • Known systemic lupus erythematosus
  • Pregnancy or breastfeeding
  • Insulin-requiring diabetes mellitus
  • Previous exposure to prednisone for ITP at a dose ≥ 1.5 mg/kg prednisone/day for ≥ 1 week prior to study entry
  • Ongoing use of treatments that are known to inhibit platelet function, e.g. aspirin
  • Anything that in the opinion of the investigator is likely to interfere with participation in the study
  • Persons previously randomized in the ITP^2 study
  • Persons currently enrolled in other interventional clinical trials
  • Exposure to thrombopoietic agent prior to study entry
  • Previous exposure to dexamethasone for the treatment of ITP at a dose of 30 mg/day or greater for subjects < 60 kg or 40 mg/day or greater for subjects >= 60 kg for at least four days

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Quadruplicar

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: High dose pulse dexamethasone
Medicamento: Dexamethasone USP Micronized
The dose for dexamethasone is 30 mg/day for patients < 60 kg and 40 mg/day for patients > 60 kg. The patient will be dosed on days 1-4, 15-18 and 29-32. On the remaining days during the treatment phase of the study, the patient will receive placebo capsules.
Comparador Ativo: Standard prednisone therapy
Medicamento: Prednisone
Prednisone will be administered to study patients at a dose of 60 mg/day for patients less than 60 kg and 80 mg/day for patients > 60 kg for 21 days. The following schedule for tapering of prednisone will be used: after three weeks of treatment at either 60 mg/day (for patients < 60 kg) or 80 mg/day (for patients ≥ 60 kg), the dose will be reduced to 40 mg/day for 1 week, then 20 mg/day for 1 week, then 10 mg/day for 1 week, then 5 mg/day for 1 week and then stopped. Placebo capsules will be added as necessary during the treatment phase of the study, to maintain blinding.

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Prazo
The Percentage of Patients in Each Treatment Arm Who Remain Free of All ITP Therapy With a Platelet Count ≥ 50,000/μl From 60 Days Through 365 Days After Study Entry.
Prazo: From 60 days through 365 days after study entry.
From 60 days through 365 days after study entry.

Medidas de resultados secundários

Medida de resultado
Prazo
The Percentage of Patients Who Remain Free of All ITP Therapy With a Platelet Count ≥ 150,000/μl From 60 Days Through 365 Days After Study Entry
Prazo: From 60 days through 365 days after study entry
From 60 days through 365 days after study entry
The Percentage of Patients With Platelets ≥ 50,000/μl at 365 Days Who Are Off All Treatment, Have Received ≤ 2 Acute Therapeutic Interventions for Thrombocytopenia, and Whose Last Acute Therapeutic Intervention Occurred at Least 90 Days Before Day 365
Prazo: 365 days after study entry
365 days after study entry
The Percentage of Patients Who Remain Free of All ITP Therapy With a Platelet Count of ≥ 150,000 From 180 Through 365 Days After Study Entry
Prazo: From 180 days through 365 days after study entry
From 180 days through 365 days after study entry
The Percentage of Patients Who Remain Free of All ITP Therapy With a Platelet Count of ≥ 50,000 From 180 Through 365 Days After Study Entry
Prazo: From 180 days through 365 days after study entry
From 180 days through 365 days after study entry
The Percentage of Patients Receiving Acute Therapeutic Intervention During the First 60 Days After Study Entry
Prazo: Through 60 days after study entry
Through 60 days after study entry
The Percentage of Patients Receiving Acute Therapeutic Intervention Beyond the First 60 Days After Study Entry
Prazo: From 60 days through 365 days after study entry
From 60 days through 365 days after study entry
The Percentage of Platelet Counts ≥ 50,000/μl After Day 60 (If a Subject Receives an Acute Therapeutic Intervention, the Next Protocol-specified Platelet Count Will be Excluded From This Analysis, as it May be Influenced by the Intervention.)
Prazo: From 60 days through 365 days after study entry
From 60 days through 365 days after study entry
The Percentage of Platelet Counts ≥ 150,000/μl After Day 60 (If a Subject Receives an Acute Therapeutic Intervention, the Next Protocol-specified Platelet Count Will be Excluded From This Analysis, as it May be Influenced by the Intervention.)
Prazo: From 60 days through 365 days after study entry
From 60 days through 365 days after study entry
The Percentage of Patients Undergoing Splenectomy
Prazo: Through 365 days after study entry
Through 365 days after study entry
Change in the Quality of Life From Randomization to Weeks 4, 8 and End of Study, Determined Using the SF-36 Health Survey
Prazo: Weeks 4, 8, and 52 after study entry
Weeks 4, 8, and 52 after study entry
The Incidence and Severity of Bleeding as Defined by a Customized Bleeding Score
Prazo: Through 365 days after study entry
Through 365 days after study entry
The Percentage of Patients Not Completing Study Therapy
Prazo: 49 days after study entry
49 days after study entry
The Percentage of Patients With Severe Adverse Events Attributable to Steroid Therapy
Prazo: Through 1 year after study entry
Through 1 year after study entry

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

HealthCore-NERI

Colaboradores

National Heart, Lung, and Blood Institute (NHLBI)

Investigadores

  • Investigador principal: James Bussel, MD, Weill Medical College, Cornell University
  • Investigador principal: Alvin Schmaier, MD, Case Western Reserve University
  • Investigador principal: Jodi Segal, MD, Johns Hopkins University
  • Investigador principal: Eliot Williams, MD, University of Wisconsin, Madison
  • Investigador principal: Thomas Ortel, MD, Duke University
  • Investigador principal: James George, MD, The University of Oklahoma
  • Investigador principal: Michele Lambert, MD, Children's Hospital of Philadelphia
  • Investigador principal: Bruce Sachais, MD, PHD, University of Pennsylvania

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo

1 de janeiro de 2010

Conclusão Primária (Real)

1 de março de 2013

Conclusão do estudo (Real)

1 de março de 2013

Datas de inscrição no estudo

Enviado pela primeira vez

7 de outubro de 2009

Enviado pela primeira vez que atendeu aos critérios de CQ

7 de outubro de 2009

Primeira postagem (Estimativa)

8 de outubro de 2009

Atualizações de registro de estudo

Última Atualização Postada (Estimativa)

14 de fevereiro de 2014

Última atualização enviada que atendeu aos critérios de controle de qualidade

2 de janeiro de 2014

Última verificação

1 de janeiro de 2014

Mais Informações

Termos relacionados a este estudo

Palavras-chave

Termos MeSH relevantes adicionais

Outros números de identificação do estudo

  • 675
  • U01HL072268 (Concessão/Contrato do NIH dos EUA)
  • HL072268
  • HL072033
  • HL072291
  • HL072196
  • HL072289
  • HL072248
  • HL072191
  • HL072299
  • HL072305
  • HL072274
  • HL072028
  • HL072359
  • HL072072
  • HL072355
  • HL072283
  • HL072346
  • HL072331
  • HL072290

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

produto fabricado e exportado dos EUA

Não

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .

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