YHS-12

YHS-12, a ionizable cationic lipid (pKa = 6.506), has been utilized both in vitro and in vivo for delivering siRNA and mRNA via lipid nanoparticles (LNPs) . These LNPs comprise YHS-12 and a targeting peptide CRVLRSGSC aimed at macrophages, encapsulating chimeric antigen receptor mRNA targeted at methicillin-resistant Staphylococcus aureus (MRSA) and siRNA against caspase-11. The LNPs have enhanced the phagocytic efficiency against MRSA in RAW 264.7 macrophages and primary murine bone marrow-derived macrophages (BMDMs) . Administered intravenously, these LNPs have reduced bacterial load in the bloodstream and increased survival rates in a sepsis model in cyclophosphamide-induced immunosuppressed mice.