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Congenital hypofibrinogenemia with a novel mutation BβCys76Phe
Motoki Sugasaki1, Shingen Nakamura2, Shinpei Arai3
1Department of Medical Technology, Tokushima University Hospital, Tokushima, Japan.
The Journal of Medical Investigation : JMI
|April 23, 2025
Summary
Researchers identified a novel genetic mutation in the fibrinogen Bβ-chain in a patient with unexplained low fibrinogen activity and antigen levels, suggesting a new cause for this condition.
Area of Science:
- Genetics
- Hematology
- Biochemistry
Background:
- Fibrinogen is crucial for blood clotting.
- Decreased fibrinogen activity can lead to bleeding disorders.
- Genetic factors are implicated in fibrinogen dysfunction.
Purpose of the Study:
- To identify the genetic cause of unexplained decreased fibrinogen activity in a patient.
- To characterize the identified mutation and its effect on fibrinogen levels.
Main Methods:
- Assessed patient's fibrinogen activity and antigen levels.
- Performed genomic sequencing of the fibrinogen gene.
- Analyzed the identified mutation in the Bβ-chain.
Main Results:
- Patient exhibited fibrinogen activity of 80 mg/dL and antigen level of 131 mg/dL.
- A novel heterozygous c.Bβ227G > T mutation was discovered in the fibrinogen Bβ-chain.
- This mutation alters cysteine 76 to phenylalanine in exon 3.
Conclusions:
- The identified mutation is associated with reduced fibrinogen activity and antigen levels.
- The precise mechanism by which this mutation impacts fibrinogen function requires further investigation.
- This finding contributes to understanding genetic causes of hypofibrinogenemia.
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