Human Genetics

, Volume 128, Issue 4, pp 443–452

Susceptibility to chronic thromboembolic pulmonary hypertension may be conferred by miR-759 via its targeted interaction with polymorphic fibrinogen alpha gene

  • Zhiyong Chen
  • Toshiaki Nakajima
  • Nobuhiro Tanabe
  • Kunihiko Hinohara
  • Seiichiro Sakao
  • Yasunori Kasahara
  • Koichiro Tatsumi
  • Yoshinori Inoue
  • Akinori Kimura
Original Investigation

DOI: 10.1007/s00439-010-0866-8

Cite this article as:
Chen, Z., Nakajima, T., Tanabe, N. et al. Hum Genet (2010) 128: 443. doi:10.1007/s00439-010-0866-8

Abstract

A deletion/insertion (Del/Ins) polymorphism of 28 base pairs (bp) in the 3′ untranslated region (UTR) of fibrinogen alpha gene (FGA) was associated with thromboembolic diseases, but the underlying mechanisms remain unknown. Computational predication reveals that the 28 bp polymorphic fragment is complementary to the sequence of a microRNA, miR-759. In this study, we aim to investigate the association and implicated mechanisms between FGA polymorphisms and the susceptibility to chronic thromboembolic pulmonary hypertension (CTEPH). The Del/Ins polymorphism was analyzed in 190 patients with CTEPH and 628 controls. The FGA 3′UTR and miR-759 interaction was investigated using luciferase assay and quantitative RT-PCR method. Expression of miR-759 and FGA in human tissues was investigated by RT-PCR. The results reveal that the allele frequency of Ins was significantly higher in the patients than in the controls (55.8 vs. 47.1%, P = 0.003, odds ratio = 1.42, 95% confidence interval: 1.13–1.79). Both miR-759 and FGA were expressed in human liver. Co-transfection of miR-759 decreased the expression and mRNA stability of reporter gene containing the FGA 3′UTR. The effect of miR-759 was stronger on the Ins allele than on the Del allele. These observations suggest that the expression of FGA was regulated by miR-759 through its interaction at the polymorphic 3′UTR sequence, which was associated with the susceptibility to CTEPH.

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Zhiyong Chen
    • 1
    • 2
  • Toshiaki Nakajima
    • 1
    • 3
  • Nobuhiro Tanabe
    • 4
  • Kunihiko Hinohara
    • 1
    • 3
  • Seiichiro Sakao
    • 4
  • Yasunori Kasahara
    • 4
  • Koichiro Tatsumi
    • 4
  • Yoshinori Inoue
    • 2
  • Akinori Kimura
    • 1
    • 3
  1. 1.Department of Molecular Pathogenesis, Medical Research Institute Tokyo Medical and Dental UniversityBunkyo-Ku, TokyoJapan
  2. 2.Department of Vascular and Applied Surgery, Graduate School of Medical and Dental SciencesTokyo Medical and Dental UniversityTokyoJapan
  3. 3.Laboratory of Genome Diversity, Graduate School of Biomedical Science Tokyo Medical and Dental UniversityTokyoJapan
  4. 4.Department of Respirology, Graduate School of MedicineChiba UniversityChibaJapan

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