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Related Experiment Videos

Gene targeting in hemostasis. Factor X.

Elliot D Rosen1

  • 1WM. Keck Center for Transgene Research and the Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA. rosen.l@nd.edu

Frontiers in Bioscience : a Journal and Virtual Library
|August 6, 2002
PubMed
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Blood coagulation Factor X (FX) deficiency causes embryonic lethality and severe bleeding in mice, highlighting FX

Area of Science:

  • Hematology
  • Genetics
  • Developmental Biology

Background:

  • Blood coagulation Factor X (FX) is a key enzyme in hemostasis.
  • Potential non-coagulant roles of FX require in vivo investigation.
  • Gene knockout technology enables studying protein physiological relevance.

Purpose of the Study:

  • To investigate the in vivo role of FX using a knockout mouse model.
  • To determine the physiological importance of FX in embryonic and postnatal survival.
  • To establish mouse models for human FX deficiency bleeding disorders.

Main Methods:

  • Generation of mice with targeted deletion of all exons encoding mature FX.
  • Analysis of genotypic distribution and survival rates.
  • Histological examination of embryos and yolk sacs for vascular defects.

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Main Results:

  • Homozygous FX deficiency causes partial embryonic lethality around E11.5-12.5 with massive bleeding.
  • Surviving pups exhibit high postnatal mortality due to various forms of bleeding.
  • No significant vascular defects were observed in deficient embryos or yolk sacs.

Conclusions:

  • FX is critical for both embryonic and postnatal survival.
  • FX-deficient mice are valuable models for studying human bleeding disorders.
  • Early lethality necessitates alternative models for studying non-hemostatic FX functions.