Low molecular weight cyclic amine containing cationic lipids for oligonucleotide delivery
View Patent ↗The instant invention provides for novel cationic lipids that can be used in combination with other lipid components such as cholesterol and PEG-lipids to form lipid nanoparticles with oligonucleotides. It is an object of the instant invention to provide a cationic lipid scaffold that demonstrates enhanced efficacy along with lower liver toxicity as a result of lower lipid levels in the liver. The present invention employs low molecular weight cationic lipids comprising at least one short lipid chain to enhance the efficiency and tolerability of in vivo delivery of siRNA.
1. A cationic lipid of Formula A:
wherein:
R 1 is selected from H, and (C 1 -C 6 )alkyl, wherein said alkyl are optionally substituted with one to three substituents selected from R″;
n and m are 1;
X is O;
L 1 is C 12 -C 24 alkenyl, said alkenyl are optionally substituted with one or more substituents selected from R″; and
L 2 is selected from C 3 -C 9 alkyl said alkyl are optionally substituted with one or more substituents selected from R″;
R″ is independently selected from H and (C 1 -C 6 )alkyl;
or any pharmaceutically acceptable salt or stereoisomer thereof.
2. A cationic lipid of Formula A according to claim 1 , wherein:
R 1 is H or methyl;
n and m are 1;
X is O;
L 1 is C 12 -C 24 alkenyl; and
L 2 is C 3 -C 9 alkyl;
or any pharmaceutically acceptable salt or stereoisomer thereof.
3. A cationic lipid which is:
trans-1-Methyl-3-[((9Z,12Z)-octadeca-9,12-dienyl)oxy]-4-octyloxy-pyrrolidine (Compound 4);
trans-1-methyl-3-[(9Z)-octadec-9-en-1-yloxy]-4-(octyloxy)pyrrolidine (Compound 5);
trans-1-methyl-3-[(12Z)-octadec-12-en-1-yloxy]-4-(octyloxy)pyrrolidine (Compound 6);
trans-3-[(3,7-dimethyloctyl)oxy]-1-methyl-4-[(9Z,12Z)-octadeca-9,12-dien-1-yloxy]pyrrolidine (Compound 7);
cis-1-methyl-3-[(9Z,12Z)-octadeca-9,12-dien-1-yloxy]-4-(octyloxy)pyrrolidine (Compound 11)
or any pharmaceutically acceptable salt or stereoisomer thereof.
4. A lipid nanoparticle comprising a cationic lipid according to claim 1 .
5. The lipid nanoparticle according to claim 4 further comprises an oligonucleotide.
6. The lipid nanoparticle according to claim 5 wherein the oligonucleotide is siRNA or miRNA.
7. The lipid nanoparticle according to claim 6 wherein the oligonucleotide is siRNA.