Global coagulation function assessed by rotational thromboelastometry predicts coagulation-steady state in individual hemophilia A patients receiving emicizumab prophylaxis.

Global coagulation function assessed by rotational thromboelastometry predicts coagulation-steady state in individual hemophilia A patients receiving emicizumab prophylaxis. Int J Hematol. 2019 Jun 28;: Authors: Yada K, Nogami K, Ogiwara K, Shida Y, Furukawa S, Yaoi H, Takeyama M, Kasai R, Shima M Abstract Emicizumab is a bispecific antibody to factor (F) IX/IXa and FX/FXa, which mimics FVIIIa cofactor function. Emicizumab prophylaxis significantly decreases bleeding events for patients with hemophilia A (PwHA). However, global hemostatic monitoring in emicizumab-treated PwHA remains poorly investigated. Using rotational thromboelastometry (ROTEM), we evaluated coagulation potentials of whole blood samples from seven emicizumab-treated PwHA who participated in ACE001JP/ACE002JP studies. Dose-dependent coagulation-enhancing effects of emicizumab to whole blood from PwHA mixed with an anti-FVIII C2 antibody in vitro were evident by non-activated ROTEM analysis (NATEM). The relationship between FVIII levels and NATEM parameters in PwHA not participating in the clinical trials demonstrated that CT + CFT inversely correlated with FVIII levels. These parameters were defined as NATEM-based grading of coagulation potential; 'T1' (FVIII < 1 IU/dL), 'T2' (1 ≤ , < 12 IU/dL) and 'T3' (12 ≤ , < 60 IU/dL). Coagulation function in emicizumab-treated PwHA was determined to be 'T2' or 'T3,' and was dependent on pla...
Source: International Journal of Hematology - Category: Hematology Authors: Tags: Int J Hematol Source Type: research