Abstract
Cancer vaccines have been widely explored as a key tool for effective cancer immunotherapy. Despite a convincing rationale behind cancer vaccines, extensive past efforts were unsuccessful in mediating significantly relevant anti-tumor activity in clinical studies. One of the major reasons for such poor outcome, among others, is the low immunogenicity of more traditional vaccines, such as peptide-, protein- and DNA- based vaccines. Recently, mRNA emerged as a promising alternative to traditional vaccine strategies due to its high immunogenicity, suitability for large-scale and low-cost production, and superior safety profile. However, the clinical application of mRNA-based anti-cancer vaccines has been limited by their instability and inefficient in vivo delivery. Recent technological advances have now largely overcome these issues and lipid-based vectors have demonstrated encouraging results as mRNA vaccine platforms against several types of cancers. This review intends to provide a detailed overview of lipid-based vectors for the development of therapeutic mRNA-based anti-tumor vaccines.
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