Process for preparation of a mRNA tumour antigen library

摘要

Pharmaceutical composition (A) contains at least one mRNA (I), including at least one region that encodes a tumor antigen (Ag), and an aqueous solvent. An independent claim is also included for a method of preparing (A) that comprises: (a) preparing a (partial) cDNA library from tumor tissue; (b) preparing a matrix for in vitro transcription of RNA from the (partial) library; and (c) in vitro transcription of the matrix. ACTIVITY : Cytostatic. Female mice that expressed the rat Her-2/neu oncogene were immunized with mRNA that encoded a truncated form of the Her-2/neu protein (lacking the cytoplasmic regions). Four of ten treated animals were still free of tumors after 9 months; untreated controls had all developed palpable breast tumors after about 20 weeks. MECHANISM OF ACTION : Vaccine.