Related Experiment Video
Updated: Oct 2, 2026

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
Published on: September 9, 2012
Factor V Leiden and genetic defects of thrombophilia in childhood porencephaly
O Debus1, H G Koch, G Kurlemann
1Department of Paediatrics, University Hospital Munster, Germany.
Insights
Genetic thrombophilia risk factors, including protein C deficiency, are linked to congenital porencephaly in infants. These findings highlight the role of anticoagulant pathway deficiencies in porencephaly development.
Area of Science:
- Medical Genetics
- Pediatric Neurology
- Hematology
Background:
- Congenital porencephaly is a rare brain malformation with multifactorial causes.
- Genetic factors, particularly thrombophilia, are increasingly recognized as potential contributors.
Purpose of the Study:
- To investigate the association between genetic thrombophilia factors and the risk of porencephaly in neonates and infants.
- To determine the prevalence of specific genetic mutations and deficiencies in patients with porencephaly.
Main Methods:
- Retrospective analysis of 24 neonates and children diagnosed with porencephaly.
- Measurement of Arg506 to Gln mutation (Factor V Leiden), protein C, protein S, antithrombin, antiphospholipid antibodies, and lipoprotein (a) levels.
Main Results:
- Genetic risk factors for thrombophilia were identified in 16 out of 24 patients.
- Common findings included heterozygous Factor V Leiden mutation, Protein C deficiency type I, increased Lp(a), and Protein S deficiency type I.
- Three patients presented with two combined genetic risk factors.
Conclusions:
- Deficiencies within the protein C anticoagulant pathway play a significant role in the etiology of congenital porencephaly.
- These genetic factors represent important targets for further research and potential therapeutic strategies.
Aims:
To determine to what extent the Arg506 to Gln point mutation in the factor V gene and further genetic factors of thrombophilia affect the risk of porencephaly in neonates and infants.
Methods:
The Arg506 to Gln mutation, factor V, protein C, protein S, antithrombin, antiphospholipid antibodies and lipoprotein (a) (Lp(a)) were retrospectively measured in neonates and children with porencephaly (n = 24).
Results:
Genetic risk factors for thrombophilia were diagnosed in 16 of these 24 patients: heterozygous factor V Leiden (n = 3); protein C deficiency type I (n = 6); increased Lp (a) (n = 3); and protein S type I deficiency (n = 1). Three of the 16 infants had two genetic risk factors of thrombophilia: factor V Leiden mutation combined with increased familial Lp (a) was found in two, and factor V Leiden mutation with protein S deficiency type I in one.
Conclusions:
The findings indicate that deficiencies in the protein C anticoagulant pathway have an important role in the aetiology of congenital porencephaly.
More Related Videos
Related Concept Videos
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Extrinsic and Intrinsic Pathways of Hemostasis
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which forms a...
Disorders of Hemostasis
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Venous Thrombosis I: Introduction
Venous Thrombosis III: Interprofessional Care
Hemorrhagic Stroke ll: Pathophysiology

