- ICH GCP
- Registro de ensaios clínicos dos EUA
- Ensaio Clínico NCT07630987
Change in Platelet Lipid Metabolism and Procoagulant Phenotype Induced by Cardiopulmonary Bypass. Impact on Postoperative Inflammatory Response and Bleeding Complications During Cardiac Surgery. (PLACARD)
Visão geral do estudo
Status
Intervenção / Tratamento
Descrição detalhada
Cardiac surgery remains associated with high morbidity and mortality despite improvements in peri and post-operative care. Cardiopulmonary bypass (CPB) triggers a sterile inflammatory response, characterized by vascular hyperpermeability, excessive vasodilation, and cardiac arrythmias, i.e. atrial fibrillation. In parallel, major peri-operative bleeding frequently necessitates transfusion of allogeneic blood products. The pathophysiology underlying these complications is multifactorial. Direct contact of blood with the CPB tubing system, combined with ischemia-reperfusion injury, profoundly alters both the inflammatory and haemostatic systems. Among blood components, platelets are particularly vulnerable to CPB-induced alterations. Platelet dysfunction is widely recognized as the main haemostatic defect associated with CPB and a major contributor to post-operative bleeding. Recent findings have demonstrated that platelet lipid metabolism plays a key role in regulating thrombo-inflammatory responses in sepsis. These observations raise the hypothesis that CPB-induced alterations in platelet lipid metabolism may critically modulate the balance between inflammation and haemostasis in cardiac surgery.
The PLACARD project therefore aims to investigate how CPB-induced platelet modifications influence post-operative inflammatory responses and bleeding complications.
Specific objectives:
- Characterize the impact of CPB on the formation of procoagulant platelets.
- Assess changes in platelet lipid composition and bioenergetics before, during and after cardiac surgery.
- Correlate ex-vivo platelet alterations with post-operative clinical outcomes and biological markers during the stay in the cardiovascular intensive care unit.
This project addresses a critical unmet need in cardiac surgery: understanding the mechanistic link between CPB-induced platelet dysfunction and thrombo-inflammatory complications. By focusing on platelet lipid metabolism, a pathway largely unexplored in this context, the project moves beyond traditional platelet function assays. The results are expected to provide fundamental mechanistic insights into procoagulant platelet formation during CPB and may identify novel biomarkers or therapeutic targets to reduce bleeding and inflammatory complications in high-risk surgical patients.
Tipo de estudo
Inscrição (Estimado)
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
- Nome: Christophe Beauloye, MD, PhD
- Número de telefone: 003227642812
- E-mail: christophe.beauloye@uclouvain.be
Estude backup de contato
- Nome: Richard Coulie, MD
- E-mail: richard.coulie@uclouvain.be
Locais de estudo
-
-
-
Brussels, Bélgica, 1200
- Cliniques Universitaires Saint-luc
-
Contato:
- Christophe Beauloye, MD, PhD
- Número de telefone: 003227642812
- E-mail: christophe.beauloye@uclouvain.be
-
Contato:
- Richard Coulie, MD
- E-mail: richard.coulie@uclouvain.be
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Subinvestigador:
- Richard Coulie, MD
-
Subinvestigador:
- Mona Momeni, MD, PhD
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Investigador principal:
- Christophe Beauloye, MD, PhD
-
-
Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
- Adulto mais velho
Aceita Voluntários Saudáveis
Descrição
Inclusion Criteria:
- Adult patients (≥ 18 years old) suffering from coronary disease and/or severe valvular dysfunction (mitral or aortic) undergoing elective coronary angiography or cardiac surgery with cardiopulmonary bypass.
Exclusion Criteria:
- Uninterrupted preoperative dual antiplatelet therapy
- Active chronic inflammatory disease
- Recent chemotherapy or immunotherapy (< 3 months)
- Active solid malignancy
- History of hematologic malignancy
- Hemophilia or other coagulopathy
- History of thrombocytopenia (< 100,000 platelets/mm³)
- Recent administration of thrombopoietin receptor agonist or immunoglobulins
- History of thrombopathy, thrombocytosis, or myeloproliferative syndrome
- History of heparin-induced thrombocytopenia (HIT)
- Cirrhosis or hepatic fibrosis (with or without hypersplenism)
- History of splenectomy, regardless of initial indication
- History of systemic autoimmune disease (e.g., systemic lupus erythematosus, scleroderma, antiphospholipid syndrome, systemic vasculitis)
- Recent major surgery (< 3 months)
- Severe renal insufficiency (eGFR ≤ 30 mL/min/m²) with or without dialysis
- Recent or chronic corticosteroid therapy
- Recent acute coronary syndrome, STEMI type (< 3 months)
- Urgent surgery or procedure
- Preoperative hemodynamic instability
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Ciência básica
- Alocação: Não randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
|
Experimental: Cathlab patients
This group includes patients with coronary disease and/or valvular disease scheduled for elective coronary angiography.
|
An arterial blood sample will be obtained at the beginning of the coronary angiography by using the arterial sheat in place, before administration of Heparin.
An arterial blood sample will be obtained via the arterial line before anesthetic induction, 60 minutes after the beginning of cardiopulmonary bypass and 4 hours after the arrival in the intensive care unit
|
|
Experimental: Cardiac surgery patients
This arm includes patients with coronary disease and/or valvular disease scheduled for elective cardiac surgery with cardiopulmonary bypass.
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An arterial blood sample will be obtained at the beginning of the coronary angiography by using the arterial sheat in place, before administration of Heparin.
An arterial blood sample will be obtained via the arterial line before anesthetic induction, 60 minutes after the beginning of cardiopulmonary bypass and 4 hours after the arrival in the intensive care unit
|
O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Procoagulant platelet formation
Prazo: Throughout the entire study, approximately during 32 months
|
Ex-vivo flow cytometric assessment of the pourcentage of procoagulant platelet population under basal and stimulated conditions.
|
Throughout the entire study, approximately during 32 months
|
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Platelet lipidomics
Prazo: Throughout the entire study, approximately during 32 months
|
Assessment of the impact of cardiac surgery and cardiopulmonary bypass on platelet lipid metabolism.
Pourcentage of patients with platelet Acety-CoA Carboxylase phosphorylation.
|
Throughout the entire study, approximately during 32 months
|
|
Postoperative bleeding
Prazo: Throughout the entire study, approximately during 32 months
|
Correlation between the ex-vivo primary outcomes and clinical postoperative parameters (chest drain output (mL) and need for blood transfusion (units of packed red cells, fresh frozen plasma, platelets and fibrinogen)).
|
Throughout the entire study, approximately during 32 months
|
|
Postoperative inflammation
Prazo: Throughout the entire study, approximately during 32 months
|
Correlation between the ex-vivo primary outcomes and biological postoperative parameters (C-reactive protein).
|
Throughout the entire study, approximately during 32 months
|
|
Postoperative platelet function
Prazo: Throughout the entire study, approximately during 32 months
|
Correlation between the ex-vivo primary outcomes and biological postoperative parameters (platelet aggregometry results).
|
Throughout the entire study, approximately during 32 months
|
|
Postoperative coagulation
Prazo: Throughout the entire study, approximately during 32 months
|
Correlation between the ex-vivo primary outcomes and biological postoperative parameters (thromboelastography and standard coagulation results (INR, aPTT, Fibrinogen)).
|
Throughout the entire study, approximately during 32 months
|
Colaboradores e Investigadores
Patrocinador
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Estimado)
Conclusão Primária (Estimado)
Conclusão do estudo (Estimado)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
- PLACARD
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
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