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The 3' end prothrombin gene variants in serbian patients with idiopathic thrombophilia
M Aradjanski1, V Djordjevic1, I Pruner1
1Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia.
Insights
Investigating the prothrombin (FII) gene
Area of Science:
- Genetics
- Hematology
- Molecular Biology
Background:
- Thrombophilia is a complex disorder with both genetic and acquired risk factors.
- Idiopathic thrombophilia, where the cause remains unknown, presents a challenge in understanding disease etiology.
- The 3' end of the prothrombin (FII) gene is a potential site for gain-of-function mutations.
Purpose of the Study:
- To screen the 3' end of the prothrombin (FII) gene for variants in patients with idiopathic thrombophilia.
- To assess the role of identified gene variants in the pathogenesis of thrombophilia.
Main Methods:
- DNA sequencing was used to analyze a 715 bp region at the 3' end of the FII gene.
- The study included 100 patients with idiopathic thrombophilia and 100 healthy controls.
Main Results:
- Two variants, A19911G and C20068T, were detected in the prothrombin gene.
- The A19911G variant showed no statistically significant difference in frequency between patients and controls.
- The C20068T variant was more frequent in patients (4.0%) than controls (1.0%), but this difference was not statistically significant.
Conclusions:
- The A19911G variant is unlikely to be a significant risk factor for idiopathic thrombophilia.
- The C20068T variant may represent a potential risk factor, warranting further investigation.
- Larger cohort studies are needed to confirm these findings and establish the role of FII gene variants in thrombophilia.
Abstract:
Thrombophilia is a multifactorial disorder that arises from the interaction of acquired and genetic risk factors. Despite the significant efforts made to understand the etiology of this disease, there are still a certain number of patients suffering from idiopathic thrombophilia. The aim of this study was to screen the 3' end of the prothrombin (FII) gene, which is susceptible to gain-of-function mutations due to its non canonical architecture, in patients with idiopathic thrombophilia and to determine its eventual role in the pathogenesis of thrombophilia. This study was carried out in 100 patients with idiopathic thrombophilia and 100 healthy controls. DNA variants in the 715 bp long region of the 3' end of the prothrombin gene were identified by sequencing. In our study, we detected two variants: A19911G and C20068T. The frequency of the A19911G gene variant was slightly increased in the group of patients compared to controls, however with no statistically significant difference compared to controls [odds ratio (OR) = 1.06; 95% confidence interval (95% CI) 0.53-2.13]. Heterozygous carriers of the FII C20068T gene variant were four times more frequent in patients (4.0%) than in controls (1.0%), but this difference did not reach statistical significance (OR = 4.12; 95% CI 0.45-37.57). Our findings suggest that variant A19911G is not a significant risk factor, while C20068T may represent a potential risk factor for idiopathic thrombophilia. To confirm our results, further studies should be conducted in a larger cohort of patients.
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