Tissue thrombin is associated with the pathogenesis of dilated cardiomyopathy

Keiichi Ito, Kenichi Hongo, Taro Date, Masahiro Ikegami, Hiroshi Hano, Mamiko Owada, Satoshi Morimoto, Yusuke Kashiwagi, Daisuke Katoh, Takuya Yoshino, Akira Yoshii, Haruka Kimura, Tomohisa Nagoshi, Ichige Kajimura, Yoichiro Kusakari, Toru Akaike, Susumu Minamisawa, Kazuo Ogawa, Kosuke Minai, Takayuki OgawaMakoto Kawai, Junji Yajima, Seiichiro Matsuo, Teiichi Yamane, Ikuo Taniguchi, Sachio Morimoto, Michihiro Yoshimura

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Background Thrombin is a serine protease known to be the final product of the coagulation cascade. However, thrombin plays other physiological roles in processes such as gastric contractions and vessel wound healing, and a state of coagulability is increased in patients with dilated cardiomyopathy (DCM). In this study, we investigate the role of thrombin in the pathogenesis of DCM. The purpose of this study is to clarify the role of thrombin in the pathogenesis of DCM and investigate the possibility of treatment against DCM by thrombin inhibition. Methods We investigated the expression of thrombin in the left ventricles of five patients with DCM who underwent the Batista operation and four patients without heart disease. Furthermore, we investigated the involvement of thrombin in the development of DCM using knock-in mice with a deletion mutation of cardiac troponin T that causes human DCM (∆ K210 knock-in mouse) (B6;129-Tnnt2 tm2Mmto) and assessed the effects of a direct thrombin inhibitor, dabigatran on ∆ K210 knock-in mice using echocardiographic examinations, the Kaplan-Meier method and Western blotting. Results The immunohistochemical analysis showed a strong thrombin expression in the DCM patients compared to the patients without heart disease. In immunohistochemical analysis, a strong thrombin expression was observed in the heart tissues analysis in the ∆ K210 knock-in mice. Dabigatran administration significantly improved fractional shortening according to the echocardiographic examination and the survival outcomes in ∆ K210 knock-in mice. Conclusion Tissue thrombin is involved in the pathogenesis of DCM and thrombin inhibition can be beneficial for the treatment of DCM.

Original languageEnglish
Pages (from-to)821-827
Number of pages7
JournalInternational Journal of Cardiology
Publication statusPublished - Feb 1 2017

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine


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