{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,25]],"date-time":"2026-03-25T21:28:11Z","timestamp":1774474091066,"version":"3.50.1"},"reference-count":30,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2018,11,28]],"date-time":"2018-11-28T00:00:00Z","timestamp":1543363200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"Chancellerie des Universities (Legs Poix)"},{"DOI":"10.13039\/501100010482","name":"Fonds de dotation pour la Recherche en Sant\u00e9 Respiratoire","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100010482","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pediatric Pulmonology"],"published-print":{"date-parts":[[2019,1]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p>Pulmonary arterial hypertension (PAH) results from pulmonary vascular disease and may eventually lead to right heart failure and death. Vasodilator therapy has greatly improved PAH prognosis. Circulating microvesicles are considered as surrogate markers of endothelial and hematopoietic cell activation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Aim<\/jats:title><jats:p>Thus, our purpose was to determine if MVs are upregulated in pediatric PAH such as reported in adult patients, and to analyze the impact of vasodilator therapies on MV count and function.<\/jats:p><\/jats:sec><jats:sec><jats:title>Patients<\/jats:title><jats:p>Population study consisted of 26 patients of median age 6.09 years, with Congenital Heart Disease (CHD) and elevated pulmonary vascular resistance (CHD\u2010PAH) or idiopathic PAH (iPAH).<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Compared to healthy controls, all circulating MV subpopulations were found higher in untreated PAH patients. No significant differences of annexin\u2010V+ total MV, endothelial, or leukocyte derived\u2010MV counts were found between untreated patients and those receiving oral vasodilator therapies. Conversely, platelet MVs were significantly lower in the group treated with SC\u2010treprostinil compared with both untreated PAH and oral therapy groups (<jats:italic>P<\/jats:italic>\u2009=\u20090.01), and exhibited a significant decrease of phospholipid procoagulant activity. Control samples treated in vitro with treprostinil at therapeutic concentrations showed as expected a significant decrease of platelet aggregation but also a reduced spontaneous MV generation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Our results suggest that treprostinil, besides vasodilation, might exert its beneficial effect through an inhibition of platelet activation, resulting in a decreased number and procoagulant activity of circulating MVs.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ppul.24190","type":"journal-article","created":{"date-parts":[[2018,11,28]],"date-time":"2018-11-28T18:49:35Z","timestamp":1543430975000},"page":"66-72","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Treprostinil treatment decreases circulating platelet microvesicles and their procoagulant activity in pediatric pulmonary hypertension"],"prefix":"10.1002","volume":"54","author":[{"given":"Nour C.","family":"Bacha","sequence":"first","affiliation":[{"name":"Inserm UMR\u2010S1140 Paris France"},{"name":"Universit\u00e9 Paris Descartes Sorbonne Paris Cite Paris France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marilyne","family":"Levy","sequence":"additional","affiliation":[{"name":"Inserm UMR\u2010S1140 Paris France"},{"name":"AP\u2010HP, Necker Hospital M3C\u2010Unit\u00e9 M\u00e9dico\u2010Chirugicale de Cardiologie P\u00e9diatrique Paris France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Coralie L.","family":"Guerin","sequence":"additional","affiliation":[{"name":"Inserm UMR\u2010S1140 Paris France"},{"name":"Universit\u00e9 Paris Descartes Sorbonne Paris Cite Paris France"},{"name":"Institut Curie Paris France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bernard","family":"Le Bonniec","sequence":"additional","affiliation":[{"name":"Inserm UMR\u2010S1140 Paris France"},{"name":"Universit\u00e9 Paris Descartes 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