1089 Local cancer immunotherapy with a mixture of cytokine-encoding mRNAs formulated in a novel lipoplex stimulates potent antitumor immune responses resulting in improved antitumo... od Virna Cortez-Retamozo, Donald Shaffer, Katalin Karikó, Marie Bernardo, Timothy R Wagenaar, Hossam Hefesha, Mikhail Levit, Isaac Esparza, Ferdia Bates, Kerstin Andrea Heyl, Christian Hotz