Linked Life Data

17562614

Source:http://linkedlifedata.com/resource/pubmed/id/17562614

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2007-6-12
pubmed:abstractText
Although the efficacy of recombinant factor VIII (rFVIII) in the treatment of type 3 von Willebrand disease (VWD) has been reported, the mechanisms by which FVIII concentrates devoid of von Willebrand factor (VWF) induce improvements in hemostasis are poorly understood. To address the role of FVIII or intrinsic coagulation in the absence of VWF, we performed a hemostatic analysis. Blood samples were obtained before and after the administration of rFVIII to 2 patients with type 3 VWD. A rotating thromboelastometry assay was performed to examine global interactions in hemostasis. Studies of thrombin-and shear-induced platelet aggregation were also conducted to elucidate the effect on platelet activation. Furthermore, we assessed the rise in the thrombin-induced intracellular concentration of free calcium [Ca2+]i. Addition of rFVIII to preinfusion blood in vitro corrected thromboelastometric parameters and thrombin-induced aggregation. In ex vivo studies, thromboelastometry analysis showed that rFVIII shortened the onset and progression of the coagulation process. Furthermore, rFVIII corrected low shear-induced and thrombin-induced platelet aggregation in platelet-rich plasma. In addition, rFVIII improved thrombin-induced [Ca2+]i flux in washed platelets. Our observations suggested that FVIII is incorporated into platelets to activate them, as well as to act directly in intrinsic coagulation in the absence of VWF. FVIII may play a critical role even in the absence of VWF.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0925-5710
pubmed:author
pubmed:issnType
Print
pubmed:volume
85
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
397-402
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Factor VIII-mediated global hemostasis in the absence of von Willebrand factor.
pubmed:affiliation
Department of Pediatrics, Nara Medical University School of Medicine, Kashihara, Japan.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't