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Thromboelastometry assessment of hemostatic properties in various murine models with coagulopathy and the effect of factor VIII therapeutics
Author(s) -
Schroeder Jocelyn A.,
Kuether Erin A.,
Fang Juan,
Jing Weiqing,
Weiler Hartmut,
Wilcox David A.,
Montgomery Robert R.,
Shi Qizhen
Publication year - 2021
Publication title -
journal of thrombosis and haemostasis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.947
H-Index - 178
eISSN - 1538-7836
pISSN - 1538-7933
DOI - 10.1111/jth.15456
Subject(s) - thromboelastometry , coagulopathy , medicine , thrombelastography , blood coagulation factors , hemostasis , von willebrand factor , pharmacology , immunology , coagulation , platelet
Background Rotational thromboelastometry (ROTEM) has been commonly used to assess the viscoelastic properties of the blood clotting process in the clinic for patients with a hemostatic or prothrombotic disorder. Objective To evaluate the capability of ROTEM in assessing hemostatic properties in whole blood from various mouse models with genetic bleeding or clotting disease and the effect of factor VIII (FVIII) therapeutics in FVIII null mice. Methods Mice with a genetic deficiency in either a coagulation factor or a platelet glycoprotein were used in this study. The properties of platelet‐ or plasma‐FVIII were also assessed. Citrated blood from mice was recalcified and used for ROTEM analysis. Results We found that blood collected from the vena cava could generate reliable results from ROTEM analysis, but not blood collected from the tail vein, retro‐orbital plexus, or submandibular vein. Age and sex did not significantly affect the hemostatic properties determined by ROTEM analysis. Clotting time (CT) and clot formation time (CFT) were significantly prolonged in FVIII null (5‐ and 9‐fold, respectively) and FIX null (4‐ and 5.7‐fold, respectively) mice compared to wild‐type (WT)‐C57BL/6J mice. Platelet glycoprotein (GP)IIIa null mice had significantly prolonged CFT (8.4‐fold) compared to WT‐C57BL/6J mice. CT and CFT in factor V (FV) Leiden mice were significantly shortened with an increased α‐angle compared to WT‐C57BL/6J mice. Using ROTEM analysis, we showed that FVIII expressed in platelets or infused into whole blood restored hemostasis of FVIII null mice in a dose‐dependent manner. Conclusion ROTEM is a reliable and sensitive assay for assessing therapeutics on hemostatic properties in mouse models with a bleeding or clotting disorder.