Unusual Surface Coagulation Activation Patterns of Crystalline and Amorphous Silicate-Based Biominerals.

ABSTRACT

Activation of coagulation cascades, especially FX and prothrombin, prevents blood loss and reduces mortality from hemorrhagic shock. Inorganic salts are efficient but cannot stop bleeding completely in hemorrhagic events, and rebleeding carries a significant mortality risk. The coagulation mechanism of biominerals has been oversimplified in the past two decades, limiting the creation of novel hemostats. Herein, at the interface, the affinity of proteins, the protease activity, fibrinolysis, hydration shell, and dynamic microenvironment are monitored at the protein level. Proteomic analysis reveals that fibrinogen and antithrombin III's affinity for kaolin's interface causes a weak thrombus and rebleeding during hemostasis. Inspiringly, amorphous bioactive glass (BG) with a transient-dynamic ion microenvironment breaches the hydration layer barrier and selectively and slightly captures procoagulant components of kiniogen-1, plasma kallikrein, FXII, and FXI proteins on its interface, concurrently generating a continuous biocatalytic interface to rapidly activate both intrinsic and extrinsic coagulation pathways. Thus, prothrombin complexes are successfully hydrolyzed to thrombin without platelet membrane involvement, speeding production of high-strength clots. This study investigates how the interface of inorganic salts assists in coagulation cascades from a more comprehensive micro-perspective that may help elucidate the clinical application issues of kaolin-gauze and pave the way to new materials for managing hemorrhage.