Arzneimittelforschung 2008; 58(4): 193-198
DOI: 10.1055/s-0031-1296492
Immunomodulators · Immunostimulants · Immunosuppressants
Editio Cantor Verlag Aulendorf (Germany)

Bio equivalence of Two Subcutaneous Pharmaceutical Products of Interferon Beta la

Guillermo Di Girolamo
1   Facultad de Ciencias Médicas, Universidad Favaloro, Buenos Aires, Argentina
Marcelo A Kauffman
2   Bio Sidus SA., Buenos Aires, Argentina
Eliseo González
3   Centro de Diagnóstico Molecular SA., Buenos Aires, Argentina
Mariana Papouchado
2   Bio Sidus SA., Buenos Aires, Argentina
Alejandra Ramirez
2   Bio Sidus SA., Buenos Aires, Argentina
Guillermo Keller
1   Facultad de Ciencias Médicas, Universidad Favaloro, Buenos Aires, Argentina
César Carbonetto
2   Bio Sidus SA., Buenos Aires, Argentina
Susana Dabsys
2   Bio Sidus SA., Buenos Aires, Argentina
Alejandro Vidal
2   Bio Sidus SA., Buenos Aires, Argentina
Aída Sterin-Prync
2   Bio Sidus SA., Buenos Aires, Argentina
Roberto A. Diez
2   Bio Sidus SA., Buenos Aires, Argentina
› Author Affiliations
Further Information

Publication History

Publication Date:
15 December 2011 (online)


Blastoferon®, in the following referred to as the test product, is a pharmaceutical product of interferon beta la (CAS 220581-49-7) currently marketed as a biosimilar to the innovator interferon beta la product (referred to as the reference product). Pharmacokinetics and pharmacodynamics assays are critically relevant to demonstrate similarity between biopharma-ceuticals. The aims of the present study were to investigate the bioavailability (BA) of the test product (either absolute or relative to the innovator product) and to compare the extent of increase of neopterin concentration following administration of either product. Two studies were performed: initially, an absolute BA assay with i.V. and s.c. injection of test product to 12 healthy subjects. Second, a formal relative BA study with s.c. injections of 88 μg of both products to 24 healthy volunteers. Blood samples for pharmacokinetic and pharmacodynamic profiling were drawn at different intervals after injection. Interferon beta (IFNB) concentrations were determined by ELISA. In the absolute BA study, a single s.c. dose of 44 μg of the test product resulted in a median bioavailable fraction of 29%, a median Tmax of 4 h (4–6) and a Cmax of 3.69 (3.27–4.41) IU · ml−1.

In the relative BA study, values for the test product were: median Tmax of 3 h (2–18), Cmax of 5.39 (4.99–6.31) IU · ml−1, AUC(0–72) of 142.86 (134.16–190.15) IU 9 h ml1 and AUC(0–infinity) of 190.95 (174.23–303.13) IU 0 h ml−1. The corresponding values for the innovator product were: Tmax of 3h (l-24),Cmax of 4.44 (4.12–5.40) IU I ml−1, AUC(0–72) of 128.77 (121.18–170.92) IU 7 h ml−1 and AUC(0-infinity) of 192.61 (183.04–286.46) IU 8 h h ml−1. The Alicia ratio was 111% (CI 90%: 106–116), the AUC(0-infinity) was 99% (CI 90%: 92–107) and the Cmax ratio was 121% (CI 90%: 112–131). IFNBla increased neopterin levels in both studies. Both products induced side-effects commonly reported for IFN with no serious adverse events. This study presents pharmacokinetics parameters of the test product and demonstrates similar bioavailability of IFNBla for both pharmaceutical products.

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