Myocardial fibrosis in mice with overexpression of human blood coagulation factor IX

Afshin Ameri, Sumiko Kurachi, Katsuo Sueishi, Mitsuhiro Kuwahara, Kotoku Kurachi

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Elevated circulatory levels of many blood coagulation factors are known to be a risk factor for deep vein thrombosis in humans. Here we report the first direct demonstration of a close association between elevated circulatory factor IX levels in mice with thrombosis as well as myocardial fibrosis. Transgenic mice overexpressing human factor IX at persistently high levels died at much younger ages than their cohorts expressing lower levels, or nontransgenic control animals. The median survival age of animals was inversely related to the circulatory levels of human factor IX. Prematurely dying animals had focal fibrotic lesions predominantly present in the left ventricular myocardium, and vasculatures in these lesions showed fibrin deposition. Thromboemboli were also present in other organs, including lung and brain. These observations support the hypothesis that persistently high circulatory levels of factor IX are a risk factor not only for thrombosis and/or thromboembolism, but also for myocardial fibrosis mimicking human myocardial infarction.

Original languageEnglish (US)
Pages (from-to)1871-1873
Number of pages3
Issue number5
StatePublished - Mar 1 2003
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology


Dive into the research topics of 'Myocardial fibrosis in mice with overexpression of human blood coagulation factor IX'. Together they form a unique fingerprint.

Cite this