Iron-enhanced coagulation is attenuated by chelation : a thrombelastographic and ultrastructural analysis

dc.contributor.authorNielsen, Vance G.
dc.contributor.authorPretorius, Etheresia
dc.date.accessioned2015-01-27T12:59:24Z
dc.date.available2015-01-27T12:59:24Z
dc.date.issued2014-12
dc.description.abstractIncreased circulating ferritin and free iron have been found in a variety of disease states associated with thrombophilia. When blood or plasma is exposed to iron addition, characteristic changes in thrombus formation are observed by scanning electron microscopy, which include fusion of fibrin polymers, matting, and even sheeting of fibrin. A primary mechanism posited to explain iron-mediated hypercoagulability is hydroxyl radical formation and modification of fibrinogen; however, iron has also been demonstrated to bind to fibrinogen. We have recently demonstrated that iron enhances coagulation, manifested as a decrease in the time of onset of coagulation. Using clinically encountered concentrations of iron created by addition of FeCl3 to human plasma, we demonstrated that iron-mediated changes in reaction time determined by thrombelastography or changes in thrombus ultrastructure were significantly, but not completely, reversed by iron chelation with deferoxamine. Thus, reversible iron binding to fibrinogen mechanistically explains a significant portion of coagulation kinetic and ultrastructural hypercoagulability. Further investigation is needed to determine whether residual iron binding or other iron-mediated effects is responsible for hypercoagulability observed after chelation.en_ZA
dc.description.embargo2015-12-31en_ZA
dc.description.librarianhb2015en_ZA
dc.description.sponsorshipDepartments of Anesthesiology and Physiology.en_ZA
dc.description.urihttp://ovidsp.tx.ovid.comen_ZA
dc.identifier.citationNielsen, VG & Pretorius, E 2014, 'Iron-enhanced coagulation is attenuated by chelation : a thrombelastographic and ultrastructural analysis', Blood Coagulation and Fibrinolysis, vol. 25, no. 8, pp. 845-850.en_ZA
dc.identifier.issn0957-5235 (print)
dc.identifier.issn1473-5733 (online)
dc.identifier.other10.1097/MBC.0000000000000160
dc.identifier.urihttp://hdl.handle.net/2263/43454
dc.language.isoenen_ZA
dc.publisherLippincott, Williams & Wilkinsen_ZA
dc.rights© 2014 Wolters.This is a non-final version of an article published in final form in Pancreas, vol. 25, no. 8, pp. 845-850, 2014. doi : 10.1097/MBC.0000000000000160en_ZA
dc.subjectCoagulationen_ZA
dc.subjectElectron microscopyen_ZA
dc.subjectIronen_ZA
dc.subjectThrombelastographyen_ZA
dc.titleIron-enhanced coagulation is attenuated by chelation : a thrombelastographic and ultrastructural analysisen_ZA
dc.typePostprint Articleen_ZA

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