Acid-sensitive compounds, their preparation and uses
申请人:——
公开号:US20020091242A1
公开(公告)日:2002-07-11
Novel acid-sensitive compounds comprising a cyclic ortho-ester that is acid-sensitive, and their salts, and comprising at least one hydrophilic substituent. These compounds are useful, for example, for forming conjugates (liposomes, complexes, nanoparticles and the like) with biologically active substances and releasing them into cellular tissues or compartments whose pH is acidic, or as nonionic surfactant for stabilizing particles encapsulating a biologically active substance and then destabilizing them in acid medium, or alternatively as a vector covalently linked to a therapeutic molecule so as to release said therapeutic molecule into the cellular tissues or compartments whose pH is acidic.
The present invention relates to novel compounds which make it possible to transfer nucleic acids into cells. These novel compounds are lipid derivatives of polythiourea. They are useful for the in vitro, ex vivo or in vivo transfection of nucleic acids into various cell types.
NOVEL MULTIMODULAR ASSEMBLY USEFUL FOR INTRACELLULAR DELIVERY
申请人:Pitard Bruno
公开号:US20120058139A1
公开(公告)日:2012-03-08
A stabilized multimodular assembly for intracellular delivery comprising a complex of at least one cationic transfection agent and of at least one negatively charged macromolecule, wherein the complex has a theoretical charge ratio ranging from about 0 to about 4, and an efficient amount of at least one amphiphilic block co-polymer acting as a steric colloidal stabilizer with respect to the complex, the block co-polymer having hydrophilic and hydrophobic blocks wherein at least one hydrophilic block is conjugated with at least one targeting ligand.
Transfecting compounds which include an aminoglycoside linked to a lipid via a spacer, and their polyguanidylated derivatives are provided. These compounds are useful for the in vitro, ex vivo, or in vivo transfection of nucleic acids into various cell types.