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Gene defects in congenital factor XIII deficiency
1Department of Clinical Chemistry, Helsinki University Central Hospital, Finland.
Seminars in Thrombosis and Hemostasis
|January 1, 1996
Summary
Recent advances reveal over 20 mutations in factor XIII A-subunit and 3 in B-subunit genes, explaining deficiency causes. Genetic defects are identified in most factor XIII deficiency cases.
Area of Science:
- Molecular genetics
- Hematology
- Biochemistry
Background:
- Factor XIII deficiency is a rare bleeding disorder.
- Understanding its molecular basis is crucial for diagnosis and treatment.
- Recent research has significantly advanced knowledge of genetic defects.
Purpose of the Study:
- To review and summarize the known mutations in the genes encoding factor XIII subunits.
- To discuss the impact of these mutations on protein structure and function.
- To highlight the current state of knowledge regarding the genetic basis of factor XIII deficiency.
Main Methods:
- Literature review of reported mutations in factor XIII A- and B-subunit genes.
- Analysis of mutation types (nonsense, frameshift, splicing, stop, missense, insertion).
- Inclusion of studies analyzing mRNA/protein expression and 3D modeling for functional impact assessment.
Main Results:
- Over 20 mutations identified in the factor XIII A-subunit gene, with half being nonsense mutations.
- 3 mutations identified in the factor XIII B-subunit gene, explaining deficiency in reported families.
- Most factor XIII A-subunit mutations are unique to families, with some population-specific enrichment and international migration.
- Structural and functional effects analyzed via expression studies and 3D modeling.
Conclusions:
- Significant progress has been made in understanding the molecular basis of factor XIII deficiency.
- A wide spectrum of mutations in both A- and B-subunit genes contribute to the disorder.
- Further characterization of genetic defects in factor XIII A-subunit deficiency is ongoing.