摘要:
The current disclosure relates to lipid-based compositions and methods useful in administering therapeutic agents such as, for example, nucleic acids (e.g., siRNA, ASO, tRNA, miRNA, mRNA, DNA, and the like), proteins, peptides, and other macromolecules, which do not have the ability to easily cross a cell membrane. In particular, certain embodiments of the disclosure relate to reversible zwitterionic lipids having a tertiary amine with an increased pKa and extended linker domains (e.g., ≥C3), that may be incorporated into lipid-based compositions (e.g., lipid nanoparticles) to increase efficiency of delivery and release of a therapeutic agent(s) to a subject. The present disclosure provides compositions comprising such reversible zwitterionic lipids, optionally in association with a therapeutic agent (e.g., a therapeutic mRNA and/or nucleic acid controller system), as well as methods of synthesizing the ionizable lipid particle compositions provided herein.