Document Detail


Fibrin presence within aortic valves in patients with aortic stenosis: association with in vivo thrombin generation and fibrin clot properties.
MedLine Citation:
PMID:  21057695     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A role of coagulation in the pathogenesis of aortic stenosis (AS) is unknown. The aim of this study was to investigate the fibrin (Fn) presence and its determinants in calcified stenotic aortic valve leaflets. Twenty-one patients with dominant AS and 17 well-matched patients with dominant aortic insufficiency (AI) undergoing aortic valve replacement were studied. Immunofluorescence analysis was performed on decalcified leaflets using antibodies against human Fn and tissue factor (TF). Fn-positive (41.4%) and TF-positive (25.3%) areas were increased in AS valves compared with AI valves (7.9% and 5.9%, respectively, both p<0.001). Patients with AS had elevated plasma D-dimer (236.4 ± 28 ng/ml, p=0.002) and prothrombin fragment 1+2 (F1.2) (261.7 ± 27.1 pM, p=0.005) compared to AI subjects (142.8 ± 10 ng/ml and 131.2 ± 1.3 pM, respectively). In AS patients Fn-positive areas correlated with TF-positive areas (r=0.68, p=0.0005), D-dimer (r=0.45, p=0.018), F1.2 (r=0.64, p=0.002), the time required for plasma fibrin clot formation (r=0.44, p=0.015) and maximum absorbance of fibrin clots (r=-0.38, p<0.0001), but not with clot permeability or lysis time. Thickness of Fn layer within AS valves was associated with maximum transvalvular gradient (r =0.41, p=0.048). Patients with maximal gradient above 75 mmHg (n=11) showed significant associations between Fn-positive area and both maximal (r =0.63) and mean (r =0.67) transvalvular gradients. Large fibrin amounts, mostly co-localised with TF, are present within the valve leaflets of patients with advanced AS. In vivo thrombin generation and fibrin clot formation are associated with the extent of Fn presence within leaflets, which might contribute to the AS progression.
Authors:
Joanna Natorska; Grzegorz Marek; Marta Hlawaty; Jerzy Sadowski; Wieslawa Tracz; Anetta Undas
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-11-05
Journal Detail:
Title:  Thrombosis and haemostasis     Volume:  105     ISSN:  0340-6245     ISO Abbreviation:  Thromb. Haemost.     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-02-02     Completed Date:  2011-05-31     Revised Date:  2012-01-10    
Medline Journal Info:
Nlm Unique ID:  7608063     Medline TA:  Thromb Haemost     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  254-60     Citation Subset:  IM    
Affiliation:
Institute of Cardiology, Jagiellonian University School of Medicine, 80 Pradnicka St., 31-202 Krakow, Poland. mmundas@cyf-kr.edu.pl
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MeSH Terms
Descriptor/Qualifier:
Aged
Aortic Valve / chemistry*,  ultrasonography
Aortic Valve Insufficiency / blood,  metabolism*,  ultrasonography
Aortic Valve Stenosis / blood,  metabolism*,  ultrasonography
Biological Markers / blood
Blood Coagulation*
Calcinosis / blood,  metabolism*,  ultrasonography
Chi-Square Distribution
Female
Fibrin / analysis*
Fibrin Fibrinogen Degradation Products / analysis
Fluorescent Antibody Technique
Humans
Male
Middle Aged
Peptide Fragments / blood
Poland
Prothrombin
Severity of Illness Index
Thrombin / metabolism*
Thromboplastin / analysis
Chemical
Reg. No./Substance:
0/Biological Markers; 0/Fibrin Fibrinogen Degradation Products; 0/Peptide Fragments; 0/fibrin fragment D; 0/prothrombin fragment 1.2; 9001-26-7/Prothrombin; 9001-31-4/Fibrin; 9035-58-9/Thromboplastin; EC 3.4.21.5/Thrombin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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