Abstract
Rurioctocog alfa pegol (BAX 855) is a novel third-generation recombinant factor VIII whose active ingredient is chemically modified with polyethylene glycol. A global multicenter phase 2/3 study of the product in 137 patients (including 11 patients from Japan) with severe hemophilia A aged 12–65 years, reported an extended half-life and a good tolerability profile, as well as a significantly lower annualized bleeding rate in the prophylactic treatment arm than in the on-demand treatment arm. Using descriptive statistics, a post hoc analysis was performed to compare the pharmacokinetics, safety, and efficacy profiles of the product in the Japanese subpopulation and the overall population. Extended half-life was demonstrated in the Japanese subpopulation. The mean [standard deviation (SD)] annualized bleeding rates in the prophylactic treatment arm were 3.7 (4.7) for the overall population (n = 120) and 4.0 (3.4) for the Japanese subpopulation (n = 11). The proportion of bleeds reported as excellent or good was 94.9% (149/157) in the overall population, whereas that in the Japanese subpopulation was 92.3% (12/13). No FVIII inhibition or anaphylactic reaction was reported in the Japanese subpopulation. The post hoc comparisons demonstrated similar pharmacokinetic, safety, and efficacy profiles between the overall population and the Japanese subpopulation.
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17 November 2017
The authors would like to correct the error in Table 2 in the original publication of the article. The “Blood type” is not described in any part of “Results” and “Discussion” and had no impact on the conclusion hence the bottom of the table is removed.
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Acknowledgements
This manuscript is dedicated to the memory of our esteemed colleague Dr. Hideji Hanabusa, MD, whose untimely passing in October 2016 left a permanent void. He touched the lives of many as a mentor, scholar, collaborator, and friend. Dr. Hanabusa was instrumental in the development of this product, and the creation and interpretation of the data included herein, and would have been a co-author of this manuscript.
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KN, MS, KF, TF, MT, TM, SH, TS, and MS made their contributions in data collection, data interpretation, and revising the manuscript. BAK made her contribution in data interpretation and revising the manuscript. WE made his contribution in statistical analyses, data interpretation, and revising the manuscript. BA, HU, and MA made their contributions in data interpretation as well as drafting and revising the manuscript. All authors had a full editorial control of the manuscript and provided their written approval forms for the content of the manuscript.
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Keiji Nogami, Midori Shima, Katsuyuki Fukutake, Hideji Hanabusa, Teruhisa Fujii, Masashi Taki, Tadashi Matsushita, Satoshi Higasa, Tetsuji Sato, and Michio Sakai were investigators in this clinical trial. Keiji Nogami has received grants from Baxalta. Midori Shima has received grants and personal fees from Baxalta outside the submitted work. Katsuyuki Fukutake has received grants and personal fees from Baxalta outside the submitted work. Teruhisa Fujii has received honoraria from Baxalta and Chugai Pharmaceutical. Masashi Taki has received an honorarium from Pfizer outside the submitted work. Tadashi Matsushita has received personal fees from Baxalta for the submitted work; grants and personal fees from Bayer, Baxalta, Novo Nordisk, Kaketsuken, and Biogen-idec outside the submitted work. Satoshi Higasa has received honoraria from Baxalta, Bayer, Pfizer, CSL Behring, Novo Nordisk, Biogen, and Chugai Pharmaceutical. Tetsuji Sato and Michio Sakai have declared no conflict of interest. Barbara A. Konkle has received research funding from Shire, Biogen, and Octapharma and serves as a consultant for Shire, Biogen, CSL Behring, and Pfizer. Werner Engl, and Brigitt Abbuehl, Haruhiko Uchikawa, and Morio Arai are full-time employees of Baxalta.
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A correction to this article is available online at https://doi.org/10.1007/s12185-017-2369-z.
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Nogami, K., Shima, M., Fukutake, K. et al. Efficacy and safety of full-length pegylated recombinant factor VIII with extended half-life in previously treated patients with hemophilia A: comparison of data between the general and Japanese study populations. Int J Hematol 106, 704–710 (2017). https://doi.org/10.1007/s12185-017-2265-6
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DOI: https://doi.org/10.1007/s12185-017-2265-6