Linked Life Data

8616045

Source:http://linkedlifedata.com/resource/pubmed/id/8616045

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1996-6-10
pubmed:abstractText
Plasma von Willebrand factor (VWF) was investigated in five patients with acute promyelocytic leukaemia (APL) before and after administration of the differentiating agent all-trans-retinoic acid (ATRA). The purpose of this study was to see how the proteolytic state associated with APL affects VWF structure and function and whether ATRA reverses any abnormality. At the onset of APL, multimeric analysis of plasma VWF revealed a lack of the largest multimers. After ATRA, there was a progressive correction of the multimeric pattern in all cases, with transient appearance of ultralarge multimers in two cases. Proteolysis was investigated with immunopurified and reduced VWF from each patient's plasma. This was electrophoresed and probed with two monoclonal antibodies that identify the 225 kD native subunit and the three native fragments of 189, 176 and 140 kD and differentiate novel proteolytic fragments produced by different proteinases. At the onset of APL, the 225 kD native subunit was relatively decreased, with the appearance of an array of novel VWF proteolytic fragments, ranging in size from <140 to <225 kD. These novel fragments observed in patients were similar to those produced in vitro by digestion of purified VWF with plasmin or elastase. After ATRA therapy, proteolysis diminished progressively in parallel with the improvement of other haemostatic measurements, but persisted to some extent. We conclude that VWF proteolysis in APL is produced by plasmin and elastase. Changes of VWF structure and function might adversely affect haemostasis in APL. Therefore, improvement of VWF after ATRA administration might explain in part the effectiveness of this drug in reducing haemorrhagic complications.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0007-1048
pubmed:author
pubmed:issnType
Print
pubmed:volume
92
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
733-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Proteolysis of von Willebrand factor is decreased in acute promyelocytic leukaemia by treatment with all-trans-retinoic acid.
pubmed:affiliation
Angelo Bianchi Bonomi Haemophilia and Thrombosis Centre, University of Milan, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't