%0 Journal Article %T Molecular Engineering of Therapeutic Cytokines %A Rodrigo Vazquez-Lombardi %A Brendan Roome %A Daniel Christ %J Antibodies %D 2013 %I MDPI AG %R 10.3390/antib2030426 %X Over the past three decades, a large body of work has been directed at the development of therapeutic cytokines. Despite their central role in immune modulation, only a handful of cytokine therapeutics has achieved regulatory approval. One of the major challenges associated with the therapeutic use of cytokines relates to their short serum half-life and low bioavailability. High doses are required to overcome these problems, which often result in dose-limiting toxicities. Consequently, most cytokines require protein engineering approaches to reduce toxicity and increase half-life. For this purpose, PEGylation, fusion proteins, antibody complexes and mutagenesis have been utilized. Here, we summarize past, recent and emerging strategies in this area. %K immunotherapy %K cytokines %K protein engineering %K immunocytokines %K fusion proteins %U http://www.mdpi.com/2073-4468/2/3/426