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<dc:title xml:lang="fr">Nouvelles cibles et traitements potentiels de l’insuffisance fibrinolytique dans la CIVD septique</dc:title>
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<dc:subject xml:lang="fr">Choc septique</dc:subject>
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<dc:subject xml:lang="en">Septic shock</dc:subject>
<dc:subject xml:lang="en">Disseminated intravascular coagulation</dc:subject>
<dc:subject xml:lang="en">Fibrinolytic insufficiency</dc:subject>
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<dcterms:abstract xml:lang="fr">Le choc septique, forme la plus sévère d’infection, conduit dans 30% des cas à une coagulation intravasculaire disséminée (CIVD), responsable d’une morbi-mortalité élevée. Elle associe activation excessive de la coagulation et insuffisance fibrinolytique, liée à un déficit en plasminogène fonctionnel secondaire à son clivage par l’élastase neutrophilique associée aux NETs. Cette thèse visait à confirmer le rôle de la NETose dans l’insuffisance fibrinolytique, à évaluer l’apport thérapeutique du plasminogène exogène et à explorer l’intérêt de cibler pharmacologiquement la NETose. L’approche translationnelle associait un modèle murin TMpro/pro d’hypercoagulabilité septique et par la confirmation dans une cohorte de 60 patients avec coagulopathie septique traités par plasma thérapeutique, source de plasminogène. Les souris TMpro/pro présentaient un déficit en plasminogène corrigé par supplémentation ou inhibition de l’élastase neutrophilique. Ces résultats ouvrent la voie à de nouvelles cibles thérapeutiques dans la CIVD septique</dcterms:abstract>
<dcterms:abstract xml:lang="en">Septic shock, the most severe form of infection, leads in 30% of cases to disseminated intravascular coagulation (DIC), which is responsible for high morbidity and mortality rates. It involves excessive coagulation activation and fibrinolytic insufficiency, linked to a deficiency in function plasminogen secondary to its cleavage by neutrophil elastase associated with NETs. This thesis aimed to confirm the role of NETosis in fibrinolytic insufficiency, evaluate the therapeutic contribution of exogenous plasminogen, and explore the value of pharmacologically targeting NETosis. The translational approach combined a TMpro/pro model of septic hypercoagulability and validation in a cohort of 60 patients with septic coagulopathy treated with therapeutic plasma, a source of plasminogen. TMpro/pro mice exhibit a plasminogen deficiency that was corrected by supplementation or inhibition of neutrophil elastase. These results provide novel insights into the pathophysiology of septic DIC and highlight potential new therapeutic targets.</dcterms:abstract>
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