Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/194908
Type: Artigo de periódico
Title: Antithrombin Deficiency In Brazilian Patients With Venous Thrombosis: Molecular Characterization Of A Single Splice Site Mutation, An Insertion And A De Novo Point Mutation.
Author: Arnaldi, L A
Pretti, F A
Zampieri, J P
Ramos, C F
Arruda, V R
Annichino-Bizzacchi, J M
Abstract: The prevalence of antithrombin (AT) deficiency in 342 unselected Brazilian patients with venous thrombosis was 1.16%, which increased to 3% when only patients under the age of 50 or with a familial history of thrombosis were considered. In two patients, a clinical (contraceptive use) or genetic risk factor (factor V Leiden and C677T in the methylene tetrahydrofolate reductase gene [MTHFR]) was identified and corroborated the hypothesis that an interaction of factors accounted for the appearance of thrombosis. However, no risk factor other than AT deficiency was identified in one patient with an important clinical and family history of spontaneous thrombosis. Three mutations were identified in these patients: a G-->A transition in intron 5 at position +1 (5'-->3'), three base insertions corresponding to arginine at position 5383 in exon 3A, and a G-->A transition at 13328, corresponding to an Ala404Thr de novo mutation. The polymorphisms in the genes coding for coagulation factors XII and XIII and fibrinogen normally associated with an increased risk for venous thrombosis were not related to thrombosis in these patients. This is the first study in South America to assess the prevalence of AT deficiency and to report the molecular characterization of the mutations involved.
Subject: Adult
Aged
Antithrombin Iii
Antithrombin Iii Deficiency
Brazil
Dna Mutational Analysis
Female
Humans
Male
Middle Aged
Mutation
Pedigree
Point Mutation
Prevalence
Rna Splice Sites
Risk Factors
Venous Thrombosis
Rights: fechado
Identifier DOI: 
Address: http://www.ncbi.nlm.nih.gov/pubmed/11755949
Date Issue: 2001
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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