Linked Life Data

1579897

Source:http://linkedlifedata.com/resource/pubmed/id/1579897

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1992-6-10
pubmed:abstractText
Von Willebrand's disease (vWD) 'Vicenza' is characterized by low plasma von Willebrand Factor antigen (vWF:Ag) and very low levels of Ristocetin Cofactor activity (RiCof). The hemorrhagic tendency in vWD 'Vicenza' is, however, mild and bleeding times in this rare vWD-subtype are only slightly prolonged (1). Larger than normal multimers of plasma-vWF and normal levels of platelet-vWF have both been suggested to compensate the defects that are normally present in vWD. To elucidate the mechanisms involved, whole blood of four patients with vWD 'Vicenza' was circulated through a rectangular perfusion chamber (2) with fibrillar collagen as adhesive surface. Under these conditions, both plasma and platelet vWF participate to platelet adhesion. Compared to perfusion results with blood of normal donors, platelet adhesion of 'Vicenza' patients was decreased. However, the Vicenza defect was less than was observed in parallel experiments with blood of vWD type 1 subtype platelet-low patients and blood of a severe vWD patient. Adhesion was not increased in perfusions with only plasma of the 'Vicenza' vWD-patients. Equal vWF:Ag concentrations of normal multimeric composition were just as effective as the high multimeric 'Vicenza' vWF. Therefore, the abnormal plasma-vWF in 'Vicenza' patients does not cause the relatively high adhesion obtained with whole blood. In contrast, platelets of vWD 'Vicenza' patients resuspended in human albumine solution (HAS) showed far better adhesion than (vWF-poor) platelets of a patient with severe vWD. The values were at least comparable and tended to be higher than those obtained with normal platelets or with platelets of patients with vWD type I subtype platelet normal.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0049-3848
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
65
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
221-8
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
In vivo experiments indicate that relatively high platelet deposition in von Willebrand's disease 'Vicenza' is caused by normal platelet-VWF levels rather than by high VWF-multimers in plasma.
pubmed:affiliation
Department of Hematology, University Hospital, Utrecht, The Netherlands.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't