Kruppel-like factor 2 (KLF2) regulates endothelial thrombotic function.

Zhiyong Lin*, Ajay Kumar, Sucharita SenBanerjee, Kristine Staniszewski, Kush Parmar, Douglas E. Vaughan, Michael A. Gimbrone, Viji Balasubramanian, Guillermo García-Cardeña, Mukesh K. Jain

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

256 Scopus citations

Abstract

The vascular endothelium maintains blood fluidity by inhibiting blood coagulation, inhibiting platelet aggregation, and promoting fibrinolysis. Endothelial cells lose these nonthrombogenic properties on exposure to proinflammatory stimuli. We recently identified the Kruppel-like factor KLF2 as a novel regulator of endothelial proinflammatory activation. Here it is found that KLF2 differentially regulates key factors involved in maintaining an antithrombotic endothelial surface. Overexpression of KLF2 strongly induced thrombomodulin (TM) and endothelial nitric oxide synthase (eNOS) expression and reduced plasminogen activator inhibitor-1 (PAI-1) expression. Furthermore, overexpression of KLF2 inhibited the cytokine-mediated induction of tissue factor (TF). In contrast, siRNA mediated knockdown of KLF2 reduced antithrombotic gene expression while inducing the expression of pro-coagulant factors. The functional importance of KLF2 was verified by in vitro clotting assays. By comparison to control infected cells, KLF2 overexpression increased blood clotting time as well as flow rates under basal and inflammatory conditions. In contrast, siRNA-mediated knockdown of KLF2 reduced blood clotting time and flow rates. These observations identify KLF2 as a novel transcriptional regulator of endothelial thrombotic function. The full text of this article is available online at http://circres.ahajournals.org.

Original languageEnglish (US)
Pages (from-to)e48-57
JournalCirculation research
Volume96
Issue number5
DOIs
StatePublished - Mar 18 2005

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

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