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<dc:title xml:lang="en">Role of neutrophils and leukotrienes in atherosclerotic plaque destabilisation : implication of endotoxemia</dc:title>
<dcterms:alternative xml:lang="fr">Rôle des neutrophiles et des leucotriènes dans la déstabilisation de la plaque d'athérosclérose : implication de l'endotoxémie</dcterms:alternative>
<dc:subject xml:lang="fr">Athérosclérose</dc:subject>
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<dc:subject xml:lang="en">Atherosclerosis</dc:subject>
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<dc:subject xml:lang="en">Leukotrienes</dc:subject>
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<dcterms:abstract xml:lang="fr">La déstabilisation de la plaque d’athérosclérose reste de nos jours un problème majeur, malgré les progrès récents dans sa compréhension. Les neutrophiles sont des acteurs puissants de l’immunité innée capables d’altérer les plaques. Un chimio-attractant majeur des neutrophiles, le leucotriène B4, pourrait être un des contributeurs potentiels de la déstabilisation des plaques en particulier dans l’endotoxémie, elle-même associée aux accidents cardiovasculaires. L’objectif de ce travail a été de définir le rôle du leucotriène B4 dans l’attraction des neutrophiles dans la plaque au cours de l’endotoxémie et de déterminer si les neutrophiles peuvent basculer l’équilibre qui maintient les plaques stables. Nous avons montré que le recrutement des neutrophiles médié par le leucotriène B4 a un impact délétère sur la stabilité des plaques au cours de l’endotoxémie en favorisant l’apoptose et la dégradation de fibres matricielles. En conclusion, cette étude ouvre la voie vers de nouvelles approches thérapeutiques visant à cibler l’axe leucotriène-neutrophiles dans la maladie athérosclérotique.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Atherosclerotic plaque destabilisation remains an important issue, in spite of the recent advances in its comprehension. Neutrophils are powerful innate immune actors capable of altering plaques. In this context, the leukotriene B4, one of the main chemoattractants of neutrophils, has been proposed as a potential contributor to plaque destabilisation. A particular context in which these two actors are closely linked is endotoxemia, itself associated with plaque destabilisation This work was aimed at determining whether leukotriene B4 plays a role in the chemoattraction of neutrophils in plaques during endotoxemia and at assessing whether neutrophils can tip the balance which maintains plaques stable. We have herein evidenced that the recruitment of neutrophils mediated by leukotriene B4 has a deleterious impact upon plaque stability during endotoxemia by promoting apoptosis and degrading matrix fibres. In conclusion, this study paves the way to novel therapeutic approaches aimed at targeting the axis leukotriene-neutrophil in atherosclerotic disease.</dcterms:abstract>
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