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- Ensaio Clínico NCT03374618
Neutrophil Extracellular Traps in Systemic Sclerosis (NET-SSC)
Neutrophil Extracellular Traps in Different Forms of Systemic Sclerosis
Systemic sclerosis (SSC) is a systemic disease characterized by limited or diffuse cutaneous sclerosis, microangiopathy, overproduction of autoantibodies and variable organ damage due to vasculopathy and/or fibrosis. The loss of self-tolerance is believed to be caused by the dysregulation of both innate and adaptive immune systems and may involve reactive oxygen species (ROS).
Neutrophils are potent producers of ROS and may play a role in endothelial cells and fibrobasts dysfunction, as in autoantibodies generation. However, their role in SSC pathogenesis remains to be determined. Recent studies discovered abnormal regulation of neutrophil extracellular traps (NETs) in other auto-immune diseases such as systemic lupus erythematosus (SLE). NETs are web-like structures composed of chromatin backbones and granular molecules. They are released by activated neutrophils through a process called "NETosis". Nets were first described in 2004 as a novel host defense mechanism to trap and kill foreign pathogens. Recent evidence shows that NETs also participate in the pathogenesis of a variety of inflammatory and autoimmune diseases, including SLE.
We hypothesis that this phenomenon could be dysregulated in SSC as in SLE and could play a prominent role in the induction of autoimmunity, as well as in the induction and perpetuation of organ damages.
Visão geral do estudo
Status
Intervenção / Tratamento
Descrição detalhada
This study is designed to assess the role of neutrophil extracellular traps (NETs) in systemic sclerosis as well as to evaluate the correlation between NETs production and NETs composition and the different complications and phenotypes observed in SSC.
30 SSC patients, 30 SLE patients and 60 healthy subjects will be recruited. Blood samples will be collected to obtain plasma, serum and polynuclear neutrophils by negative selection.
- The main aim of the study is to evaluate the quantity of NETs induced by serum from SSc patients on neutrophils from either healthy or SSC patients in vitro. The quantity of NETs produced by different populations of neutrophils in contact with sera from SSC will be compared with those produced by the same different populations of neutrophils in contact with sera from SLE, and healthy subjects (two control populations).
Other objectives:
- To assess the composition of the NETs produced by different populations of neutrophils exposed to serum from SSC, SLE and healthy subjects.
- To correlate the quantity and the composition of NETS with clinical phenotype in SSc
- To assess the role of serum cytokines in Nets production in SSC.
Tipo de estudo
Inscrição (Antecipado)
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
- Nome: Amélie SERVETTAZ
- Número de telefone: +33 032683269
- E-mail: aservettaz@chu-reims.fr
Estude backup de contato
- Nome: Coralie BARBE
- E-mail: cbarbe@chu-reims.fr
Locais de estudo
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-
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Reims, França
- Recrutamento
- Damien JOLLY
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Contato:
- Amélie SERVETTAZ
- E-mail: aservettaz@chu-reims.fr
-
-
Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Gêneros Elegíveis para o Estudo
Descrição
Inclusion Criteria:
for patients of arm 1:
- patients with systemic lupus erythematosus
- patients consenting to participate to the study
- patients enrolled in the national healthcare insurance program
for patients of arm 2:
- patients with systemic sclerosis
- patients consenting to participate to the study
- patients enrolled in the national healthcare insurance program
For patients of arm 3 (healthy volunteers)
- Patients without Chronic inflammatory systemic disease
- Patients without Current or past neoplasy,
- patients without chronic metabolic pathology
- patients without treatment by anti inflammatory or corticotherapy for the last 15 days,
- patients without infectious pathology or inflammatory acute for the last 15 days
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: systemic lupus erythematosus
adult with systemic lupus erythematosus
|
Blood sample to quantify and qualify netosis in vivo and ex vivo after different stimulations in SSC, SLA and healthy controls
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Experimental: systemic sclerosis
adult with systemic sclerosis
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Blood sample to quantify and qualify netosis in vivo and ex vivo after different stimulations in SSC, SLA and healthy controls
|
Outro: healthy volunteers
healthy volunteer (adult)
|
Blood sample to quantify and qualify netosis in vivo and ex vivo after different stimulations in SSC, SLA and healthy controls
|
O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
---|---|---|
Quantification of neutrophil extracellular traps (NETs) generated after stimulation of neutrophils in vitro by serum from SSC, SLE and healthy controls.
Prazo: Day 0
|
Comparative analysis of the quantity of neutrophil extracellular traps (NETs) generated after stimulation of neutrophils in vitro by serum from SSC, SLE and healthy controls.
Neutrophils from SSC, SLE and healthy subjects will be used.
|
Day 0
|
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
---|---|---|
Analysis of the composition of neutrophil extracellular traps
Prazo: Day 0
|
Comparative analysis of the composition of neutrophil extracellular traps (NETs) generated after stimulation of neutrophils in vitro by serum from SSC, SLE and healthy controls.
Neutrophils from SSC, SLE and healthy subjects will be used.
|
Day 0
|
Analysis of the cytokines influencing NETs production in vitro
Prazo: Day 0
|
Comparative analysis of the quantity of neutrophil extracellular traps (NETs) generated after stimulation of neutrophils from SSC patients in vitro by differents cytokines
|
Day 0
|
Colaboradores e Investigadores
Patrocinador
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Real)
Conclusão Primária (Antecipado)
Conclusão do estudo (Antecipado)
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
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
- PO17014
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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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