Journal article
Variability in bleeding phenotype in Amish carriers of haemophilia B with the 31008 C -> T mutation
Haemophilia : the official journal of the World Federation of Hemophilia, Vol.15(1), pp.91-100
01/01/2009
DOI: 10.1111/j.1365-2516.2008.01792.x
PMID: 18721150
Abstract
The aim of this study was to characterize the variability of bleeding phenotype and its association with plasma factor IX coagulant activity (FIX:C) in haemophilia B carriers in a large Amish pedigree with a unifying genetic mutation, C-to-T transition at base 31008 of the factor IX gene (Xq27.1-27.2). A cross-sectional survey of haemophilia B carriers included a multiple choice questionnaire evaluating symptoms of mucocutaneous bleeding, joint bleeding and bleeding after haemostatic stress [menstruation, postpartum haemorrhage (PPH), dental extractions and invasive surgeries]. Severity of bleeding was graded as 0 to 4, 0 being no bleeding whereas 4 being severe bleeding. Association between total bleeding scores and the FIX:C was evaluated. Sixty-four haemophilia B carriers participated in this study. Median age: 18 years (range 1-70 years); median bleeding score: 1 (range 0-8). Besides PPH, isolated symptoms of bruising, epistaxis, menorrhagia and postsurgical bleeding including dental extraction were not associated with lower FIX:C. Bleeding score >= 3 was associated with involvement of at least two bleeding sites and a lower mean FIX:C of 42 +/- 10.3% (95% CI 36.4-47.7) while a score > 3 had involvement of <= 2 sites and higher mean FIX:C of 54.9 +/- 21.5% (95% CI 49-61), P = 0.005. Subcutaneous haematoma formation and bleeding after haemostatic stress requiring treatment were associated with bleeding scores >= 3. Phenotypic variability existed among the carriers of haemophilia B who belonged to a single pedigree carrying a single unifying mutation. The utility of bleeding scores to define bleeding phenotype precisely in haemophilia B carriers needs further evaluation.
Details
- Title: Subtitle
- Variability in bleeding phenotype in Amish carriers of haemophilia B with the 31008 C -> T mutation
- Creators
- A. Sharathkumar - Indiana Hemophilia and Thrombosis CenterB. Hardesty - Indiana UniversityA. Greist - Indiana Hemophilia and Thrombosis CenterJ. Salter - Indiana UniversityB. Kerlin - Nationwide Children's HospitalM. Heiman - Indiana Hemophilia and Thrombosis CenterM. Sulkin - University of RochesterA. Shapiro - Indiana Hemophilia and Thrombosis Center
- Resource Type
- Journal article
- Publication Details
- Haemophilia : the official journal of the World Federation of Hemophilia, Vol.15(1), pp.91-100
- Publisher
- Wiley
- DOI
- 10.1111/j.1365-2516.2008.01792.x
- PMID
- 18721150
- ISSN
- 1351-8216
- eISSN
- 1365-2516
- Number of pages
- 10
- Language
- English
- Date published
- 01/01/2009
- Academic Unit
- Stead Family Department of Pediatrics; Hematology/Oncology
- Record Identifier
- 9984354036002771
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