Ecarin
Ecarin is an metalloprotease enzyme that is derived from the venom of the Indian saw-scaled viper, Echis carinatus, It is the primary reagent in the Ecarin clotting time test.
Ecarin is known to activate prothrombin, another protein that is a critical component of the blood clotting cascade.
Origin
The venom of the saw-scaled viper, Echis carinatus, causes bleeding and eventually death. The venom contains ecarin, which converts prothrombin to meizothrombin, a thrombin analog with increased esterase activity, and not to normal thrombin.Clinical Use
Ecarin is a highly versatile drug compound used in blood clotting experiments and for monitoring and treating a range of diseases, including cancer, liver diseases, lupus, and cardiovascular disorders.Testing
Ecarin-based assays are tests that have the prospect to be clinically helpful in detecting vitamin K deficiency and lupus anticoagulant. The Ecarin clotting time is a test that is widely used for lupus anticoagulant testing in certain regions. Ecarin-based testing is used to monitor dabigatran etexilate, a thrombin inhibitor, with both clot-based and chromogenic-based methods available.In 2015, it was reported that 30% of oral anticoagulants prescribed for Medicare patients in the United States were direct oral anticoagulants, with dabigatran being a popular choice among cardiologists and internal medicine physicians. This is largely due to the drug's safety and efficacy. It has been shown to be effective in preventing stroke and systemic embolism, and has a lower risk of bleeding compared to warfarin. However, it is important to note that monitoring the effects of dabigatran can be challenging, as traditional coagulation tests such as the prothrombin time and activated partial thromboplastin time are not sensitive to the drug's effects. This is where Ecarin-based testing comes in, as it provides a more accurate measure of dabigatran's anticoagulant effect.