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Oleic acid\u2010coated Fe<jats:sub>3<\/jats:sub>O<jats:sub>4<\/jats:sub> nanoparticles were first prepared through thermal degradation and then encapsulated into small clusters with a phosphatidylcholine coating to obtain hydrophilic nanomicelles. A thorough characterization confirmed the chemical nature of the coating and the excellent colloidal stability of these nanomicelles in aqueous media. Magnetization and relaxivity properties proved their suitability as magnetic resonance imaging (MRI) contrast agent and in vitro cell viability data showed low toxicity. Vascular lifetime and elimination kinetics in the liver were assessed by blood relaxometry and by in vivo MRI in rats and compared with \u201ccontrol\u201d particles prepared with a polyethylene glycol derivative. These micellar particles had a lifetime in blood of more than 10\u2005h, much longer than the control nanoparticles (\u22482\u2005h), which is remarkable considering that the coating molecule is a small biocompatible zwitterionic phospholipid. The protein corona was characterized after incubation with rat serum at different times by high\u2010throughput proteomics, showing a higher proportion of bound apolipoproteins and other dysopsonins for the phosphatidylcholine particles. The antibiofouling properties of this corona and its resistance to the adsorption of proteins corroborate the observed enhanced stability and prolonged systemic circulation.<\/jats:p>","DOI":"10.1002\/chem.201404221","type":"journal-article","created":{"date-parts":[[2014,10,15]],"date-time":"2014-10-15T11:03:06Z","timestamp":1413370986000},"page":"16662-16671","source":"Crossref","is-referenced-by-count":31,"title":["Phosphatidylcholine\u2010Coated Iron Oxide Nanomicelles for In Vivo Prolonged Circulation Time with an Antibiofouling Protein Corona"],"prefix":"10.1002","volume":"20","author":[{"given":"Hugo","family":"Groult","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jes\u00fas","family":"Ruiz\u2010Cabello","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ana Victoria","family":"Lechuga\u2010Vieco","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jes\u00fas","family":"Mateo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marina","family":"Benito","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Izaskun","family":"Bilbao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mar\u00eda Paz","family":"Mart\u00ednez\u2010Alc\u00e1zar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan. 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