Functional polymorphism in gamma-glutamylcarboxylase is a risk factor for severe neonatal hemorrhage.

Vanakker, Olivier M; De Coen, Kris; Costrop, Laura; Coucke, Paul J; Vanhaesebrouck, Piet; De Paepe, Anne · J Pediatr · 2011

case_report · Level V

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Abstract

A neonate who received vitamin K (VK) supplementation then developed severe late-onset bleeding with abnormal prothrombin time and activated partial thromboplastine time. The bleeding was corrected after intravenous VK. Molecular analysis of the gamma-glutamylcarboxylase gene revealed a heterozygous single nucleotide polymorphism, which decreases carboxylase activity and induces VK-dependent coagulation deficiency.

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