Probing the coagulation pathway with aptamers identifies combinations that synergistically inhibit blood clot formation.


Journal Article

Coordinated enzymatic reactions regulate blood clot generation. To explore the contributions of various coagulation enzymes in this process, we utilized a panel of aptamers against factors VIIa, IXa, Xa, and prothrombin. Each aptamer dose-dependently inhibited clot formation, yet none was able to completely impede this process in highly procoagulant settings. However, several combinations of two aptamers synergistically impaired clot formation. One extremely potent aptamer combination was able to maintain human blood fluidity even during extracorporeal circulation, a highly procoagulant setting encountered during cardiopulmonary bypass surgery. Moreover, this aptamer cocktail could be rapidly reversed with antidotes to restore normal hemostasis, indicating that even highly potent aptamer combinations can be rapidly controlled. These studies highlight the potential utility of using sets of aptamers to probe the functions of proteins in molecular pathways for research and therapeutic ends.

Full Text

Cited Authors

  • Bompiani, KM; Lohrmann, JL; Pitoc, GA; Frederiksen, JW; Mackensen, GB; Sullenger, BA

Published Date

  • August 14, 2014

Published In

Volume / Issue

  • 21 / 8

Start / End Page

  • 935 - 944

PubMed ID

  • 25065530

Pubmed Central ID

  • 25065530

Electronic International Standard Serial Number (EISSN)

  • 1879-1301

Digital Object Identifier (DOI)

  • 10.1016/j.chembiol.2014.05.016


  • eng

Conference Location

  • United States