Glyco lipid nanoparticles can target the spleen and de-target the liver without charge

Lipid nanoparticles (LNPs) formulated with a neutral helper lipid can deliver RNA to the liver in humans. However, clinically relevant delivery to other tissues has remained challenging. To avoid the liver, scientists often add antibodies or helper lipids with a permanent charge. Here we report an alternative approach: antibody- and charge-independent liver de-targeting. Using DNA barcoding to test 109 chemically distinct LNPs in vivo, we found that replacing a neutral helper lipid with a neutral glycolipid reduced liver delivery and increased splenic delivery. Consistent with this differential tropism, these glyco lipid nanoparticles (GlycoLNPs) caused different downstream cellular signaling in vivo compared to traditional LNPs. These data suggest that extrahepatic LNPs can be designed without charge.