Abstract
Eculizumab, a humanized monoclonal antibody to complement C5, is a therapeutic drug for atypical hemolytic–uremic syndrome (aHUS) that inhibits the terminal pathway of complement. Patients on eculizumab therapy may become more susceptible to infection with capsule-forming bacteria, including meningococci. Therefore, meningococcal vaccination is required for patients who are on eculizumab therapy. However, the means to prevent meningococcal infection in infants who cannot be vaccinated with the available meningococcal vaccine have not yet been established internationally. In two infants with aHUS at 4–5 months after birth, prophylactic oral amoxicillin was administered, and meningococcal infection was not detected during the period between the initiation of eculizumab therapy and the administration of meningococcal vaccine. Neither adverse events related to amoxicillin nor thrombotic microangiopathy occurred during the treatment. Thus, oral administration of amoxicillin may be effective for preventing meningococcal infection under treatment with eculizumab in infants who have not received meningococcal vaccination.
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Acknowledgements
We deeply appreciate Dr. Masanori Matsumoto, Department of Blood Transfusion Medicine, Nara Medical University, Japan, for his contribution to the analysis of ADMTS13. We are grateful to Dr. Yoko Yoshida, Hideki Kato, and Masaomi Nangaku, The Division of Nephrology and Endocrinology, The University of Tokyo Hospital, Japan for their contribution to sheep erythrocyte hemolysis test, anti-factor H antibody assay, and gene analysis. We also thank The Japanese Association for Complement Research for their contribution to complement test and gene analysis which were financially supported by Alexion GK as a company-sponsored research. Kae Uetani of Statcom Co., Ltd., Tokyo, Japan, provided assistance in preparing the manuscript funded by Alexion Pharma GK.
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Tanaka, K., Fujita, N. & Hibino, S. Prophylactic amoxicillin for the prevention of meningococcal infection in infants with atypical hemolytic uremic syndrome under treatment with eculizumab: a report of two cases. CEN Case Rep 9, 247–251 (2020). https://doi.org/10.1007/s13730-020-00465-x
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DOI: https://doi.org/10.1007/s13730-020-00465-x