Comparative Efficacy of Recombinant FVIII and Recombinant FVII Biosimilars in Severe Hemophilia A.

BackgroundHemophilia A (HA) occurs due to the deficiency of factor VIII (FVIII). Individuals with HA generally present with elevated activated partial thromboplastin time (aPTT) and normal prothrombin time (PT). The only possible treatment for this bleeding condition is factor concentrate.AimThe aim of this study is to compare the effect of recombinant factor VIII (rFVIII) and recombinant factor VII (rFVII) on prothrombin time (PT), activated partial thromboplastin time (aPTT), FVIII and FVII in severe HA.MethodologyA mixing study was conducted on 30 samples of severe HA patients to assess the correction of PT, aPTT, FVIII, and FVII values using biosimilars of rFVIII (NovoEight and Kogenate FS) and rFVII (NovoSeven and AryoSeven) using a fully automated coagulation analyser 'Ceveron alpha'.ResultsAll the four drugs demonstrated a significant alteration for both PT ( < .0001) and aPTT ( < .0001) values. A significant, notable increase of FVIII levels were observed for FVIII biosimilars. Further investigation into the effect of rFVII biosimilars on inhibitor-positive patients revealed a significant alteration in PT ( < .0001) and aPTT ( < .001) values.ConclusionTo the best of our knowledge, this is the first study to compare the effect of all four drugs on PT, aPTT, FVIII, and FVII. Two different groups of biosimilars were found to have a high potential to alter the PT and aPTT values. The FVIII biosimilars are efficient in increasing the FVIII levels.