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In Vitro Assessment of the Biologic Activity of Interferon Beta Formulations used for the Treatment of Relapsing Multiple Sclerosis
Carolina Scagnolari, Carla Selvaggi, Emilia Di Biase, Maurizio Fraulo, Fernando Dangond & Guido Antonelli
Journal of Immunoassay and Immunochemistry, Volume 35, Issue 3, 2014
A new formulation (NF) of subcutaneous (sc) interferon (IFN) β-1a was developed in an attempt to improve injection tolerability and immunogenicity. We compared antiviral and IFNβ-stimulated gene (ISG) activities of IFNβ-1a sc NF with IFNβ-1a sc original formulation and IFNβ-1b sc. When equivalent unit amounts were compared, the IFNβ formulations demonstrated similar antiviral activity and induced similar levels of ISG mRNA. However, on a weight basis (ng/mL), significantly more IFNβ-1b sc was needed to equal the antiviral activity of either IFNβ-1a sc formulation, and both IFNβ-1a sc formulations induced significantly higher levels of ISG mRNA than IFNβ-1b sc.