From 1997, plasma-derived C1-inhibitor concentrate (Cetor®) has been available to HAE and AAE patients. Recently, a virus reducing 15. nm nanofiltration step has been introduced in the production process. A randomized, double-blind controlled cross-over study was performed to compare the pharmacokinetics (PK) of nanofiltered (C1-INH-NF) with conventional C1-inhibitor (C1-INH). Efficacy and safety were investigated in an open-label, on-demand and a prophylactic study. No differences in pharmacokinetic parameters between C1-INH and C1-INH-NF were found (13 non-symptomatic HAE patients). Both C1-inhibitor products equally increased plasma C4 levels. In the on-demand study, 14 acute angioedema attacks in 8 patients were analyzed. In the prophylactic study, 1 AAE and 5 HAE patients experienced in total 31 attacks during 748 observation days. In total 180,000 units of C1-INH-NF were administered. No product-related adverse events occurred, and no anti-C1-antibodies were induced. Nanofiltration in the production process of C1-inhibitor did not affect the pharmacokinetics, efficacy, and safety.

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doi.org/10.1016/j.clim.2011.11.005, hdl.handle.net/1765/37999
Clinical Immunology
Erasmus MC: University Medical Center Rotterdam

Hofstra, J. J., Budde, I., van Twuyver, E., Choi, G., Levi, M., Leebeek, F., de Monchy, J. G., Ypma, P., de Keizer, R. J. W., Huitema, A.& Strengers, P. F. W. (2012). Treatment of hereditary angioedema with nanofiltered C1-esterase inhibitor concentrate (Cetor®): Multi-center phase II and III studies to assess pharmacokinetics, clinical efficacy and safety. Clinical Immunology, 142(3), 280–290.https://doi.org/10.1016/j.clim.2011.11.005