Identification of ADRA2A polymorphisms related to shear-mediated platelet function

Mariko Yabe, Yumiko Matsubara, Shinichi Takahashi, Hiroaki Ishihara, Toshiro Shibano, Koichi Miyaki, Kazuyuki Omae, Gentaro Watanabe, Mitsuru Murata, Yasuo Ikeda

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


α2A adrenergic receptor (ADRA2A) on platelets interacts with epinephrine, which has a key role in regulating platelet functions. There is familial clustering of inter-individual variations in the epinephrine-induced platelet aggregation, the molecular basis of which, however, has not been fully understood. In this study, we screened the sequence variations in the transcriptional region of ADRA2A gene and analyzed the relationship between the two common polymorphisms and platelet function using epinephrine/collagen cartridge in the platelet function analyzer-100 system®, in a healthy Japanese male population (n = 211). Among the identified 16 sequence variations including five novel variations, 1780GG genotype was associated with longer closure time which represents low platelet function under high shear-stress conditions (p = 0.0478). We also observed enhanced effect of the combination of 1780GG and 2372AA genotypes on longer closure time (p = 0.0319). These findings suggest that 1780A/G and 2372A/G polymorphisms are associated with platelet function in interactions with collagen/epinephrine.

Original languageEnglish
Pages (from-to)1001-1005
Number of pages5
JournalBiochemical and Biophysical Research Communications
Issue number4
Publication statusPublished - 2006 Sept 8


  • Platelet
  • Polymorphism
  • α2A adrenergic receptor

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology


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