Table 2

Concentrations of thrombin used in experiments

Concentration (nM)


Most historical experiments

20–500

EC50 for PAR-1 activation

0.05

Baseline levels of markers of thrombin generation in PROWESS patients (severe sepsis)

~0.1–1

More recent studies of APC's effects on thrombin/PAR-1/endothelial cells

0.02–1


APC, activated protein C; EC50, Concentration inducing half-maximum activation of PAR-1; PAR-1, protease-activated receptor 1; PROWESS, Recombinant Human Activated Protein C Worldwide Evaluation in Severe Sepsis.

Macias et al. Critical Care 2005 9(Suppl 4):S38   doi:10.1186/cc3747