Article (Scientific journals)
Impact of Neutrophil Extracellular Traps on Clinical Outcome after Subarachnoid Hemorrhage: A Translational Narrative Review.
Delvoye, François; Lebeau, Julie; Oury, Cécile et al.
2026 • In Translational Stroke Research, 17 (4)
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Keywords :
Cognitive Impairment; Delayed Cerebral Ischemia; Neutrophil Extracellular Traps; Subarachnoid Hemorrhage; Thrombo-Inflammation; Humans; Animals; Extracellular Traps/metabolism; Subarachnoid Hemorrhage/complications; Subarachnoid Hemorrhage/metabolism; Subarachnoid Hemorrhage/immunology; Neutrophils/metabolism; Brain Ischemia/etiology
Abstract :
[en] Aneurysmal subarachnoid hemorrhage (aSAH) remains associated with substantial morbidity and mortality despite best medical treatment. Increasing evidence implicates thrombo-inflammation (TI), driven by neutrophils and neutrophil extracellular traps (NETs), in the pathogenesis of delayed cerebral ischemia (DCI) and cognitive impairment. This narrative review summarizes experimental and clinical data linking neutrophil activation and NETs formation to DCI after aSAH and outlines emerging therapeutic strategies. This review was structured according to the SANRA (Scale for the Assessment of Narrative Review Articles) guidelines and followed general recommendations for narrative reviews. A comprehensive PubMed and clinicaltrials.gov search identified experimental and clinical studies published in English without time window, focusing on TI, neutrophil activation, or NETosis in the acute phase of aSAH. Past and ongoing clinical trials were classified by mechanism of action. Experimental models and human data show early and sustained neutrophil activation within cerebral and systemic compartments after aSAH. NETs promote microvascular thrombosis, blood-brain barrier disruption, microglial activation, and neuronal injury, ultimately contributing to DCI and long-term cognitive impairment. Outside the brain, NETs may also aggravate neurogenic pulmonary edema and cardiac dysfunction. In animal models, deoxyribonuclease I (DNase I) effectively degrades NETs, improving perfusion, limiting neuronal apoptosis, and enhancing recovery. Several ongoing trials target TI pathways, including the RESET trial, which evaluates the impact of IV DNase I on clinical outcome after aSAH. NETs produced after neutrophil activation may be central to DCI. Targeting NETs represents a promising translational path to improve cerebral and systemic outcomes after aSAH.
Disciplines :
Neurology
Author, co-author :
Delvoye, François   ✱;  Université de Liège - ULiège > Département des sciences cliniques ; Interventional Neuroradiology Department, Rothschild Foundation Hospital, Paris, France. fdelvoye@chuliege.be ; Stroke-Link, F-CRIN Research Infrastructure, Lille, France. fdelvoye@chuliege.be
Lebeau, Julie  ✱;  Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Biodiversité, Ecosystème et Paysage (BEP)
Oury, Cécile  ;  Université de Liège - ULiège > GIGA > GIGA Metabolism & Cardiovascular Biology - Cardiology
D'Emal, Céline ;  Université de Liège - ULiège > GIGA > GIGA Metabolism & Cardiovascular Biology - Cardiology
Lambermont, Bernard  ;  Université de Liège - ULiège > GIGA > GIGA Molecular & Computational Biology - Biomechanics Research Unit
Layios, Nathalie  ;  Université de Liège - ULiège > Département des sciences de la santé publique
Ledoux, Didier  ;  Université de Liège - ULiège > Département des sciences cliniques > Soins intensifs
Dubuisson, Annie ;  Université de Liège - ULiège > Département des sciences cliniques
Deprez, Louis  ;  Université de Liège - ULiège > Département des sciences cliniques
Moïse, Martin  ;  Université de Liège - ULiège > Département des sciences cliniques
Ho-Tin-Noé, Benoit;  Therapeutic Optimization in Neuropsychopharmacology, Université Paris-Cité, INSERM, Paris, U1144, France
Mazighi, Mikael;  Interventional Neuroradiology Department, Rothschild Foundation Hospital, Paris, France ; Therapeutic Optimization in Neuropsychopharmacology, Université Paris-Cité, INSERM, Paris, U1144, France ; Stroke-Link, F-CRIN Research Infrastructure, Lille, France
Engrand, Nicolas;  Neuro-intensive Care Unit, Rothschild Foundation Hospital, Paris, France
Désilles, Jean-Philippe;  Interventional Neuroradiology Department, Rothschild Foundation Hospital, Paris, France ; Therapeutic Optimization in Neuropsychopharmacology, Université Paris-Cité, INSERM, Paris, U1144, France ; Stroke-Link, F-CRIN Research Infrastructure, Lille, France
Maïer, Benjamin;  Interventional Neuroradiology Department, Rothschild Foundation Hospital, Paris, France ; Stroke-Link, F-CRIN Research Infrastructure, Lille, France ; Neurology Department, Hôpital Paris Saint-Joseph, Paris, France
More authors (5 more) Less
✱ These authors have contributed equally to this work.
Language :
English
Title :
Impact of Neutrophil Extracellular Traps on Clinical Outcome after Subarachnoid Hemorrhage: A Translational Narrative Review.
Publication date :
30 June 2026
Journal title :
Translational Stroke Research
ISSN :
1868-4483
eISSN :
1868-601X
Publisher :
Springer Science and Business Media LLC, United States
Volume :
17
Issue :
4
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique
ANR - Agence Nationale de la Recherche
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