Abstract:
:A 2-year-old girl is described with severe haemophilia A (factor VIII: C < 0.01 units/ml). Both of her parents were phenotypically normal. Cytogenetic analysis on the proband demonstrated an interstitial X chromosome deletion encompassing Xq26-q28. Molecular studies with several polymorphic markers close to and within the factor VIII gene showed that the proband had inherited only the paternal factor VIII gene, indicating that the X chromosome deletion had occurred de novo in the maternal germ line. Further study of the factor VIII gene inherited by the proband from her father showed the presence of a de novo gene inversion mutation (a type 1, distal pattern inversion). Neither parent showed any evidence of the factor VIII inversion in their somatic DNA. The severe haemophilia A documented in this girl is therefore the result of two de novo mutations affecting the factor VIII gene, a maternally derived X chromosome deletion and a paternal factor VIII inversion mutation.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
Windsor S,Lyng A,Taylor SA,Ewenstein BM,Neufeld EJ,Lillicrap Ddoi
10.1111/j.1365-2141.1995.tb05213.xsubject
Has Abstractpub_date
1995-08-01 00:00:00pages
906-9issue
4eissn
0007-1048issn
1365-2141journal_volume
90pub_type
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