Fusion Proteins Composed of an Interleukin-2 Mutein and Type I Interferon

摘要

The present invention describes fusion proteins based on cytokines, called bi-cytokines (BC), specifically formed by the binding of an IL2 agonist mutein with a type I interferon (IFN), linked by an Fc region of a mutant human IgG1 and a connector peptide. The combination of an IL2 agonist mutein and a type I IFN in the structure of the bi-cytokines gives surprising immunoregulatory properties to these molecules and a superior therapeutic effect than that of parental cytokines, or their combination, which makes them attractive and novel molecules for the treatment of cancer. Pharmaceutical compositions comprising as an active ingredient the fusion proteins object of this patent are also described.