Frequency of the p.Gly262Asp mutation in congenital Factor X deficiency

Serdar Epcacan, Marzia Menegatti, Sinan Akbayram, Andrea Cairo, Flora Peyvandi, Ahmet F. Oner

Research output: Contribution to journalArticlepeer-review


Introduction: Congenital factor X (FX) deficiency is a rare bleeding disorder inherited as an autosomal recessive trait with an incidence of 1 : 500 000-1 000 000. A total or partial deficiency of FX causes an impairment of clot formation, leading to a haemorrhagic disease, which manifests with bleeding symptoms of different severity, also unprovoked. Aim: We analysed the clinical manifestations, laboratory phenotype and genotype in 12 patients from Turkey affected with severe FX deficiency. Methods: Prothrombin time (PT), activated partial thromboplastin time (APTT), FX activity (FX:C) and FX antigen level (FX:Ag) were measured, and mutation analysis was performed for all patients. Results: The most frequent bleeding episodes in patients were epistaxis and easy bruising (11/12, 91%), followed by haemarthroses (10/12, 83%). FX:C was A, p.Gly262Asp missense mutation (previously reported as Gly222Asp), which is associated with severe bleeding symptoms. Conclusion: The p.Gly262Asp missense mutation was identified in 11 of the 12 patients in this study. Previously published cases on the same p.Gly262Asp mutation were Iranian patients originating from the border between Turkey and Iran suggesting that this mutation may be candidate as a good tool for mutational screening analysis in this area.

Original languageEnglish
Pages (from-to)1087-1091
Number of pages5
JournalEuropean Journal of Clinical Investigation
Issue number10
Publication statusPublished - Oct 1 2015


  • Factor X
  • Factor X deficiency
  • Genotype-phenotype association
  • Haemorrhage
  • Rare bleeding disorders

ASJC Scopus subject areas

  • Medicine(all)
  • Clinical Biochemistry
  • Biochemistry


Dive into the research topics of 'Frequency of the p.Gly262Asp mutation in congenital Factor X deficiency'. Together they form a unique fingerprint.

Cite this