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Blood, 15 December 2000, Vol. 96, No. 13, pp. 4370-4372
BRIEF REPORT
A new mutation in the HNF4 binding region of the factor VII
promoter in a patient with severe factor VII deficiency
Josephine A. Carew,
Eleanor
S. Pollak,
Stanislaw Lopaciuk, and
Kenneth A. Bauer
From the Hematology-Oncology Section, Boston VA
Healthcare System, and Department of Medicine, Harvard Medical School,
Boston, MA; Department of Pathology and Laboratory Medicine, University
of Pennsylvania School of Medicine, Philadelphia, PA; and the
Laboratory of Blood Coagulation, Institute of Hematology and Blood
Transfusion, Warsaw, Poland.
Investigation of the molecular basis of a severe factor VII (fVII)
deficiency revealed compound heterozygosity in the fVII gene. On the
paternal allele the patient had 3 structural gene abnormalities
frequently associated with fVII deficiency. A new mutation, a C to T
transition at position 55 relative to the translational start site,
was found on the maternal allele. The study demonstrates that
this mutation partially impeded binding of the transcriptional
activator, hepatic nuclear factor 4, to the fVII promoter while greatly
reducing reporter gene expression in hepatic cells.

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