Thromb Haemost 2015; 114(01): 173-185
DOI: 10.1160/TH14-10-0880
Stroke, Systemic or Venous Thromboembolism
Schattauer GmbH

NMMHC IIA inhibition impedes tissue factor expression and venous thrombosis via Akt/GSK3β-NF-κB signalling pathways in the endothelium

Kefeng Zhai
1   State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, Nanjing, P. R. China
2   Institute of Pharmaceutical Biotechnology, Suzhou University, Suzhou, P. R. China
,
Youmei Tang
1   State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, Nanjing, P. R. China
,
Yuanyuan Zhang
1   State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, Nanjing, P. R. China
,
Fang Li
1   State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, Nanjing, P. R. China
,
Yan Wang
1   State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, Nanjing, P. R. China
3   Department of Internal Medicine, Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, Conneticut, USA
,
Zhengyu Cao
1   State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, Nanjing, P. R. China
,
Jun Yu
3   Department of Internal Medicine, Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, Conneticut, USA
4   Center of Translation Medicine, Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi, P. R. China
,
Junping Kou
1   State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, Nanjing, P. R. China
3   Department of Internal Medicine, Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, Conneticut, USA
,
Boyang Yu
1   State Key Laboratory of Natural Products, Jiangsu Key Laboratory of TCM Evaluation and Translational Research, Department of Complex Prescription of TCM, China Pharmaceutical University, Nanjing, P. R. China
› Author Affiliations

Financial support: The present research was supported by the National Natural Science Foundation of China (No. 81274131), 2011’ Program for Excellent Scientific and Technological Innovation Team of Jiangsu Higher Education, a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, and the Project Program of the State Key Laboratory of Natural Medicines, China Pharmaceutical University (No. JKGZ201107).
Further Information

Publication History

Received: 24 October 2014

Accepted after major revision: 19 February 2015

Publication Date:
22 November 2017 (online)

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Summary

Non-muscle myosin heavy chain IIA (NMMHC IIA) has been shown to be involved in thrombus formation and inflammatory microparticle release in endothelial cells. However, the role of NMMHC IIA in regulating the expression of tissue factor (TF) and deep venous thrombosis remains to be elucidated. In the present study, endothelial cells were stimulated with tumour necrosis factor-α (TNF-α) to induce TF expression. Pretreatment with the NMMHC II inhibitor blebbistatin suppressed the mRNA and protein expressions as well as the procoagulant activity of TF in a dose-dependent manner. Blebbistatin enhanced Akt and GSK3β phosphorylation and inhibited NF-κB p65 nuclear translocation and IκBα degradation. These observations were similar to the effect of CHIR99021, a GSK3β inhibitor. TF downregulation by blebbistatin was antagonised by the PI3K inhibitor, wortmannin. Furthermore, siRNA knockdown of NMMHC IIA but not IIB or IIC, inhibited TF expression, activated Akt/GSK3β and suppressed NF-κB signalling pathways, whereas the overexpression of NMMHC IIA increased TF expression. The binding of NMMHC IIA and TNF receptor 2 mediated signal internalisation in TNF-α-stimulated endothelial cells. Importantly, blebbistatin decreased endothelium NMMHC IIA and TF expression, deactivated GSK3β by inducing its phosphorylation, suppressed p65 nuclear translocation, and inhibited thrombus formation in a mouse deep venous thrombosis model. Our findings provide solid evidence that inhibition of NMMHC II most likely NMMHC IIA impedes TF expression and venous thrombosis via Akt/GSK3β-NF-κB signalling pathways in the endothelium both in vitro and in vivo. NMMHC IIA might be a potential novel target for the treatment of thrombotic disorders.