Human Genetics

, Volume 119, Issue 1, pp 84–91

Functional polymorphisms of FGA, encoding α fibrinogen, are associated with susceptibility to venous thromboembolism in a Taiwanese population

  • Yu-Lin Ko
  • Lung-An Hsu
  • Tsu-Shiu Hsu
  • Chia-Ti Tsai
  • Ming-Sheng Teng
  • Semon Wu
  • Chi-Jen Chang
  • Ying-Shiung Lee
Original Investigation

DOI: 10.1007/s00439-005-0102-0

Cite this article as:
Ko, YL., Hsu, LA., Hsu, TS. et al. Hum Genet (2006) 119: 84. doi:10.1007/s00439-005-0102-0

Abstract

To determine the genetic risk factors for venous thromboembolism (VTE), this study examined 14 genetic variants from 10 hemostatic genes in 186 Taiwanese VTE patients and the same number of matched controls, which demonstrated FGA (encoding α fibrinogen) Thr312Ala polymorphism was the only variant significantly associated with VTE. Nine genetic polymorphisms on the fibrinogen cluster region of chromosome 4q28 were further studied, in which four FGA polymorphisms were found in strong linkage disequilibrium and were significantly associated with VTE by genotype and allele frequency analyses. Haplotype analysis showed significantly different FGA haplotype frequencies between VTE patients and controls with the haplotype F1, containing -1051G, -3A, 312Ala and TaqI duplication alleles, significantly associated with susceptibility to VTE (P=0.001). Haplotype-pair analysis results also indicated a strong association of the haplotype-pair F1F1 with VTE in various VTE patient subgroups. In vitro functional analysis indicated that FGA -1051G, -3A and TaqI duplication alleles enhanced significantly the transcription level of FGA; however, control subjects with FGA genotypes containing these alleles had no elevated plasma fibrinogen levels. In conclusion, our experimental data indicated that functional genetic variants in FGA are risk factors for VTE in Taiwanese populations. Determination of FGA genotypes will likely contribute to primary prevention of this condition.

Supplementary material

439_2005_102_MOESM1_ESM.doc (147 kb)
Supplementary material

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Yu-Lin Ko
    • 1
  • Lung-An Hsu
    • 1
  • Tsu-Shiu Hsu
    • 1
  • Chia-Ti Tsai
    • 2
  • Ming-Sheng Teng
    • 1
  • Semon Wu
    • 1
  • Chi-Jen Chang
    • 1
  • Ying-Shiung Lee
    • 1
  1. 1.The First Cardiovascular DivisionChang-Gung Memorial HospitalTaipei, Taiwan, ROC
  2. 2.Division of Cardiology, Department of Internal MedicineNational Taiwan University HospitalTaipei, Taiwan, ROC