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Pharmacogenomic Biomarker Study for Recombinant Human Activated Protein C Treatment in Severe Sepsis

5 de dezembro de 2011 atualizado por: Sirius Genomics Inc.

A Multicenter Pharmacogenomic Biomarker Study in Matched Patients With Severe Sepsis Treated With or Without Recombinant Human Activated Protein C [Xigris®, Drotrecogin Alfa (Activated)]

The overall purpose of the study is to determine whether either of the Improved Response Polymorphisms (IRPs) individually predicts a differential DrotAA treatment effect in patients with severe sepsis and high risk of death. This will be an international, multicenter, "prospective-retrospective", nonrandomized, controlled, outcome-blinded, genotype-blinded, matched-patients study. No prospective enrollment or treatment of patients will occur under this protocol. Retrospectively collected clinical data and DNA samples will be analyzed for existing cohorts of patients with severe sepsis who were previously treated with DrotAA (treatment group) or not (control group) as part of their standard care in an ICU.

Visão geral do estudo

Status

Desconhecido

Condições

Descrição detalhada

This will be a multicenter, "prospective-retrospective", controlled, matched-patients study. Retrospective phenotypic data and DNA samples will be obtained from patient registries and clinical trials where the study hypotheses were not related to DrotAA treatment. The prospective aspect of this study will be the statistical testing of prespecified hypotheses regarding the IRP genotype as a predictive biomarker for differential DrotAA treatment effects.

To control for differences in standard of care in different countries and medical centers, the selection of matched control patients will be performed within each cohort. Control patients will be selected to match the DrotAA-treated patients using an algorithm that matches on baseline demographic and disease characteristics that may have influenced the decision to give DrotAA or that may impact survival. A propensity score (the likelihood for having received DrotAA treatment) will be derived using the matching variables that are common in all cohorts. The number of matched control patients for each treated patient will be variable, up to a maximum of 3.

The selection of the control patients via the matching algorithm will be conducted by an independent clinical research organization (CRO) in a blinded manner - specifically without knowledge of survival outcome, other outcome data, and genotype. A two-phase transfer of data from each center will be implemented to ensure that the selection of matched control patients is implemented in a blinded manner. The first step will involve the transfer of the baseline data for all variables needed to conduct the matching. Once the control patients have been identified for each cohort, the outcomes data will be transferred to the CRO in the second phase of data transfer.

Centralized genotyping using a validated Taqman®-based analytical method will be conducted on the DNA samples for all matched patients. The genotyping laboratory will be blinded to treatment and outcome.

The total number of patients in the available cohorts is >23,000, with approximately 800 who have received DrotAA as part of their standard ICU-based care. After applying eligibility criteria to all patients and selecting the matched control patients, it is expected that the final analysis will include approximately 3000 patients.

Tipo de estudo

Observacional

Inscrição (Antecipado)

3000

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

Canadá
- British Columbia
  - Vancouver, British Columbia, Canadá, V6Z 1Y6
    - University of British Columbia and Providence Health Care, St. Paul's Hospital
Estados Unidos
- Georgia
  - Atlanta, Georgia, Estados Unidos, 30322
    - Emory University School of Medicine
- Maryland
  - Baltimore, Maryland, Estados Unidos, 21224
    - Johns Hopkins University, Bayview Medical Center
- Massachusetts
  - Boston, Massachusetts, Estados Unidos, 02115
    - Harvard University School of Public Health
- Tennessee
  - Nashville, Tennessee, Estados Unidos, 73232-2650
    - Vanderbilt University Schoo of Medicine
França
- - Garches, França, 92380
    - University of Versailles, Hospital Raymond Poincaré (AP-HP)
  - Paris, França, 75014
    - Université Paris Descartes, Sorbonne Paris Cité, Cochin Hotel-Dieu University Hospital
Reino Unido
- - London, Reino Unido, W6 8RF
    - Imperial College London, Charing Cross Hospital

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

18 anos e mais velhos (Adulto, Adulto mais velho)

Aceita Voluntários Saudáveis

Não

Gêneros Elegíveis para o Estudo

Tudo

Método de amostragem

Amostra Não Probabilística

População do estudo

The indicated-patients population (INDICATED) population will be the primary population for this study and it will include those DrotAA-treated patients who have documented severe sepsis and high risk of death, defined in keeping with the regulatory approvals in the EU and US, and their matched controls. Documented organ dysfunction will be defined according to published criteria. A secondary severe sepsis population (SEVSEP) will have had documented severe sepsis, but not necessarily a high risk of death. The INDICATED population will be a subset within the broader SEVSEP population.The SEVSEP population will be analyzed only if at least 10% larger than the INDICATED population.

Descrição

Inclusion Criteria for INDICATED population:

Age ≥ 18 years
Severe sepsis (must meet a, b, and c below)
- Suspected or proven infection
- Systemic Inflammatory Response Syndrome (SIRS)(must meet 2 of 4 criteria)
  - Temperature < 36°C or > 38°C
  - Heart rate > 90 beats/minute
  - Respiratory rate > 20 breaths/minute or PaC02 < 32 mm Hg) or on mechanical ventilation
  - White blood cell count < 4,000/mm3 or > 12,000/mm3
- At least one organ dysfunction due to sepsis based on definitions of clinically significant organ dysfunction
  - Cardiovascular dysfunction [must meet one of (1), (2), or (3) below]:
    - Systolic blood pressure ≤ 90 mmHg and pH ≤ 7.3
    - Mean arterial pressure ≤ 70 mmHg and pH ≤ 7.3
    - Reported use of a vasopressor alone is sufficient evidence of shock
  - Pulmonary dysfunction: PaO2/FiO2 ≤ 300 mmHg
  - Central Nervous System dysfunction: Glasgow Coma Scale ≤ 12
  - Coagulation dysfunction: platelets ≤ 80,000/mm3
  - Renal dysfunction: creatinine ≥ 2.0 mg/dL
  - Hepatic dysfunction: bilirubin ≥ 2.0 mg/dL
High risk of death (one of a, b, or c below)
- APACHE II ≥ 25
- SAPS II ≥ 54
- Multiple organ dysfunction - two or more clinically significant organ dysfunctions (as defined above), which have occurred within 2 days of each other
Platelet counts ≥ 30,000/mm3
DrotAA status known

Exclusion Criteria:

Patients with no DNA
Patients enrolled in local cohort more than 2 years before Xigris [drotrecogin alfa activated)] was commercially available

A secondary analysis population with severe sepsis will be defined by Inclusion Criteria 1, 2, 4, and 5 above, and the Exclusion Criteria. This will be referred to as the SEVSEP population.

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

Número de grupos/coortes

Coortes e Intervenções

Grupo / Coorte
DrotAA Treatment Group Patients with severe sepsis at high risk of death (INDICATED patients) who received treatment with drotrecogin alfa (activated (DrotAA) as part of standard care in ICU. The standard dosing regimen for DrotAA is 96 hours of continuous infusion at a dose of 24 ug/kg/hour. DrotAA is also known as recombinant human activated protein C.
Control Group (non-DrotAA treated) Patients with severe sepsis at high risk of death (INDICATED patients) who did not receive DrotAA treatment as part of their standard care in an ICU. The Control group patients will be selected to match the DrotAA-treated patients based on numerous clinical covariates, including propensity score (for DrotAA treatment).

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado	Descrição da medida	Prazo
In-hospital mortality through Day 28 Prazo: Through Day 28.	All cause in-hospital mortality up to Day 28 or discharge, whichever comes first. Day 1 is the day when patient meets eligibility criteria for this study.	Through Day 28.

Medidas de resultados secundários

Medida de resultado	Descrição da medida	Prazo
Time to death in hospital Prazo: Through Day 28	Time to death (any cause) in hospital, censored by the competing risk of discharge from hospital	Through Day 28
Time to death Prazo: Through Day 60	Time to death (any cause), censored at Day 60 or last evaluation. Will be evaluated using data from centers where follow-up extended beyond hospital discharge.	Through Day 60
Mechanical ventilator-free days through Day 28 Prazo: Through Day 28	Number of days alive and free of mechanical ventilation from Day 1 through Day 28.	Through Day 28
ICU-free days through Day 28 Prazo: Through Day 28	Number of days alive and free of ICU from Day 1 through Day 28.	Through Day 28
Hospital-free days through Day 28 Prazo: Through Day 28	Number of days alive and free of hospitalization from Day 1 through Day 28.	Through Day 28
ICU length of stay Prazo: Through Day 180		Through Day 180
Hospital length of stay Prazo: Through Day 180		Through Day 180

Colaboradores e Investigadores

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

Patrocinador

Sirius Genomics Inc.

Investigadores

Investigador principal: Djillali Annane, MD, PhD, University of Versailles
Diretor de estudo: Alexandra DJ Mancini, MSc, Sirius Genomics Inc.

Publicações e links úteis

A pessoa responsável por inserir informações sobre o estudo fornece voluntariamente essas publicações. Estes podem ser sobre qualquer coisa relacionada ao estudo.

Publicações Gerais

Annane D, Mira JP, Ware LB, Gordon AC, Hinds CJ, Christiani DC, Sevransky J, Barnes K, Buchman TG, Heagerty PJ, Balshaw R, Lesnikova N, de Nobrega K, Wellman HF, Neira M, Mancini ADJ, Walley KR, Russell JA. Pharmacogenomic biomarkers do not predict response to drotrecogin alfa in patients with severe sepsis. Ann Intensive Care. 2018 Jan 31;8(1):16. doi: 10.1186/s13613-018-0353-2.

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 outubro de 2011

Conclusão Primária (Antecipado)

1 de abril de 2012

Conclusão do estudo (Antecipado)