Analysis of Factor VIII polymorphic markers as a means for carrier detection in Brazilian families with haemophilia A

Haemophilia A is an X‐linked, recessively inherited bleeding disorder of varying severity, which results from the deficiency of procoagulant factor VIII f(8). Linkage diagnosis using polymorphic markers in the f8 gene is widely used to detect carriers. The objective of this study was to verify the i...

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Bibliographic Details
Published in:Haemophilia : the official journal of the World Federation of Hemophilia 2007-07, Vol.13 (4), p.409-412
Main Authors: DE CARVALHO, F. M., DE VARGAS WOLFGRAMM, E., PANETO, G. G., DE PAULA CARETA, F., SPAGNOL PERRONE, A. M., DE PAULA, F., LOURO, I. D.
Format: Article
Language:English
Subjects:
Brazil
Brazilian population
carrier detection
Factor VIII - analysis
Factor VIII - genetics
Female
Genetic Carrier Screening - methods
Genetic Linkage - genetics
genetic markers
Genetic Markers - genetics
haemophilia A
Hemophilia A - diagnosis
Hemophilia A - genetics
Humans
linkage analysis
Male
Mutation
Pedigree
polymorphism
Polymorphism, Genetic - genetics
Pregnancy
Prenatal Diagnosis - methods
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Summary:Haemophilia A is an X‐linked, recessively inherited bleeding disorder of varying severity, which results from the deficiency of procoagulant factor VIII f(8). Linkage diagnosis using polymorphic markers in the f8 gene is widely used to detect carriers. The objective of this study was to verify the informativeness of three polymorphic markers in the Brazilian population, to evaluate the usefulness of such markers in carrier detection procedures. Sixty‐three unrelated healthy volunteers and 10 haemophilic families were studied. Two microsatellite repeats and one HindIII RFLP markers were used. Carrier and non‐carrier status could be determined in 80% of females investigated. Intron 13 markers presented the highest heterozygosity rate (79%) followed by intron 22 (68%) and intron 19 (57%). When all three markers were used together, linkage analysis informativeness increased significantly. We conclude that these markers are suitable for carrier detection in the Brazilian population and we recommend their use in combination to maximize diagnostic efficiency.
ISSN:1351-8216
1365-2516
DOI:10.1111/j.1365-2516.2007.01475.x