A new vaccine from the laboratory of KI faculty member Daniel Anderson targets mRNA to immune cells using lipid nanoparticles. The nanoparticles, described in Nature Biotechnology, protect antigen-coding mRNA from breaking down in the injection site and guide the payload to antigen-presenting immune cells that will in turn attract and stimulate T cells and other immune cells. Further, the lipid polymers themselves boost T cell activity by activating the STING (stimulator of interferon genes) pathway. The team is working to build a library of additional immune-stimulating nanoparticle structures and screen them to identify the designs that best boost the vaccine’s effectiveness against individual cancers and other diseases.