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Molecular genetics of human antithrombin deficiency
1Department of Haematology, University of Cambridge, United Kingdom.
Human Mutation
|January 1, 1996
Summary
Human antithrombin deficiency, affecting 1 in 630 people, increases thrombosis risk. Genetic studies identify DNA mutations, aiding in understanding antithrombin
Area of Science:
- Biochemistry
- Genetics
- Molecular Biology
Background:
- Human antithrombin is a key plasma protein inhibiting thrombin.
- Antithrombin deficiency is linked to recurrent thromboses, affecting 1:630 individuals.
- Deficiencies impact 3-5% of thrombotic disease patients.
Purpose of the Study:
- To investigate the genetic basis of human antithrombin deficiency.
- To identify DNA mutations in families with antithrombin deficiency.
- To aid structure-function studies and genetic counseling.
Main Methods:
- Gene cloning and mapping of the antithrombin (AT3) gene to chromosome 1q23-25.
- Analysis of the AT3 gene structure (seven exons, six introns, 13,477bp).
- Application of molecular genetic techniques to identify DNA mutations.
Main Results:
- The AT3 gene structure and location were elucidated.
- DNA mutations were identified in over 80 families with antithrombin deficiency.
- Molecular data provides insights into antithrombin structure-function relationships.
Conclusions:
- Molecular genetic studies are crucial for understanding antithrombin deficiency.
- Identifying specific DNA mutations facilitates genetic counseling for at-risk individuals.
- This research supports informed genetic counseling based on variant natural history.