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Published on: August 18, 2015
Inherited prothrombotic risk factors in children with stroke, transient ischemic attack, or migraine
Désirée Coen Herak1, Margareta Radic Antolic, Jasna Lenicek Krleza
1Clinical Institute of Laboratory Diagnosis, Clinical Hospital Center Zagreb, Zagreb University School of Medicine, Kispaticeva 12, Zagreb 10000, Croatia.
Insights
Inherited prothrombotic factors like Factor V G1691A significantly increase stroke and transient ischemic attack risk in children. Platelet glycoprotein variations may also play a role in migraine and TIA susceptibility.
Area of Science:
- Pediatric Neurology
- Hematology
- Genetics
Background:
- Childhood stroke, transient ischemic attack (TIA), and migraine are serious neurological conditions.
- Understanding the role of inherited prothrombotic risk factors is crucial for risk assessment and prevention.
Purpose of the Study:
- To investigate the prevalence of inherited prothrombotic risk factors in children diagnosed with stroke, TIA, or migraine.
- To explore the association between specific genetic polymorphisms and these neurological conditions.
Main Methods:
- Genotypic analysis was performed for Factor V G1691A, Factor II G20210A, MTHFR C677T, and platelet glycoprotein polymorphisms (HPA-1, -2, -3, -5).
- 150 children with stroke, TIA, or migraine were compared to 112 age-matched controls without thromboembolic history.
Main Results:
- Factor V G1691A heterozygosity was linked to a sevenfold increased risk of arterial ischemic stroke and TIA.
- Specific human platelet alloantigen (HPA) alleles (HPA-2b, HPA-5a/b) were associated with increased TIA risk.
- HPA-2b allele increased migraine risk by 2.23-fold, while HPA-3b showed a protective effect against arterial ischemic stroke.
Conclusions:
- Factor V G1691A is a significant risk factor for arterial ischemic stroke and TIA in pediatric populations.
- Platelet glycoprotein polymorphisms may have a minor role in TIA and migraine risk, warranting further investigation in larger cohorts.
Objective:
The aim of this study was to investigate the prevalence and possible association of inherited prothrombotic risk factors in children with stroke, transient ischemic attack, or migraine.
Methods:
We performed genotypic analysis for factor V G1691A, factor II G20210A, methylenetetrahydrofolate reductase C677T, and 4 common platelet glycoprotein polymorphisms (human platelet alloantigen-1, -2, -3, and -5) in 150 children <18 years of age with established diagnoses of stroke, transient ischemic attack, or migraine. Children were classified into 5 groups, namely, childhood arterial ischemic stroke (N = 33), perinatal arterial ischemic stroke (N = 26), hemorrhagic stroke (N = 20), transient ischemic attack (N = 36), and migraine (N = 35). The control group consisted of 112 children < or =18 years of age from the same geographical region who had no history of neurologic or thromboembolic diseases.
Results:
Heterozygosity for factor V G1691A was associated with approximately sevenfold increased risk for arterial ischemic stroke, perinatal arterial ischemic stroke, and transient ischemic attack. Increased risk for transient ischemic attack was found in carriers of the human platelet alloantigen-2b allele, human platelet alloantigen-5a/b genotype, and combined human platelet alloantigen-2b and human platelet alloantigen-5b genotype. The presence of the human platelet alloantigen-2b allele was associated with a 2.23-fold increased risk for migraine, whereas carriers of the human platelet alloantigen-3b allele had a lower risk for arterial ischemic stroke than did carriers of the human platelet alloantigen-3a allele.
Conclusions:
Factor V G1691A has an important role in susceptibility to arterial ischemic stroke, both in the perinatal/neonatal period and in childhood, as well as transient ischemic attacks. A minor impact of human platelet alloantigen polymorphisms suggests that platelet glycoprotein polymorphisms may increase the risk of transient ischemic attacks and migraine, but this should be confirmed in larger studies.
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Ischemic Stroke ll: Pathophysiology
