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Dysfibrinogenemia and hypofibrinogenemia - Spectrum of pathogenic variants in Slovak patients
Dominika Jaraskova1, Jan Chandoga1, Angelika Batorova2
1Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine and University Hospital Bratislava, Comenius University, Bratislava, Slovakia.
Insights
This study identified six novel genetic variants in fibrinogen genes (FGA, FGB, FGG) in Slovak patients with congenital hypofibrinogenemia and dysfibrinogenemia, expanding knowledge of these rare bleeding disorders.
Area of Science:
- Genetics
- Hematology
- Molecular Biology
Background:
- Congenital hypofibrinogenemia (CH) and congenital dysfibrinogenemia (CD) are rare inherited bleeding disorders.
- These conditions result from quantitative or qualitative defects in the fibrinogen gene.
Purpose of the Study:
- To investigate the genetic basis and clinical features of congenital fibrinogen disorders.
- Focus on patients from Slovakia registered at the National Haemophilia Centre.
Main Methods:
- Genetic analysis of fibrinogen genes (FGA, FGB, FGG) was performed.
- Polymerase chain reaction (PCR) followed by direct sequencing was utilized.
- 36 patients with congenital fibrinogen disorders were analyzed.
Main Results:
- Six novel genetic variants were identified across FGA, FGB, and FGG genes.
- Specific variants were found in patients with CD (FGA, FGG) and CH (FGG, FGB).
- Detailed molecular-genetic findings are reported for each identified variant.
Conclusions:
- The study contributes to the understanding of genetic variants in congenital fibrinogen disorders.
- Identified novel variants expand the known spectrum of genetic defects.
- Provides valuable data on the genetic landscape of these disorders in the Slovak population.
Introduction:
Congenital hypofibrinogenemia (CH) and congenital dysfibrinogenemia (CD) are rare coagulation disorders caused by quantitative or qualitative defects in the fibrinogen gene. The aim of this study was to characterize the genetic background and the clinical manifestations of congenital fibrinogen disorders in the patients from Slovakia registered at the National Haemophilia Centre.
Materials And Methods:
Results of genetic analysis of the fibrinogen genes FGA, FGB and FGG using polymerase chain reaction followed by direct sequencing were evaluated in 36 patients.
Results:
Molecular-genetic analysis revealed six novel variants - FGA c.923_968dup p.(Gly324Lysfs*44) and FGG c.1105C>T p.(His369Tyr) were identified in CD patients. In CH patients, in the FGG gene c.8G>A p.(Trp3*), c.823G>T p.(Glu275*) and c.323C>A p.(Ala108Asp) variants were detected. In the FGB gene c.1427C>T p.(Ser476Leu) was identified.
Conclusion:
This study is a positive contribution towards expanding knowledge about genetic variants in patients with congenital fibrinogen disorders.
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