Compositions comprising immunostimulatory siRNA molecules and DLinDMA or DLenDMA
First Claim
Patent Images
1. A nucleic acid-lipid particle comprising:
- (a) a modified siRNA comprising a double-stranded sequence of about 15 to about 30 nucleotides in length, said sequence comprising a non-immunostimulatory mismatch motif relative to an unmodified siRNA sequence that is capable of silencing expression of a target sequence, wherein the mismatch motif consists of a 5′
-XX′
-3′
dinucleotide corresponding to a 5′
-GU-3′
dinucleotide in the sense or antisense strand of the unmodified siRNA sequence, wherein X and X′
are independently selected from the group consisting of A, U, C, and G, with the proviso that if X is G, X′
is not U and if X′
is U, X is not G,wherein the modified siRNA is less immunogenic than the unmodified siRNA sequence, andwherein the modified siRNA is capable of silencing expression of the target sequence;
(b) a cationic lipid, wherein said cationic lipid is selected from the group consisting of 1,2-DiLinoleyloxy-N,N-dimethylaminopropane (DLinDMA), 1,2-Dilinolenyloxy-N,N-dimethylaminopropane (DLenDMA), and a mixture thereof;
(c) a non-cationic lipid; and
(d) a conjugated lipid that inhibits aggregation of particles.
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Abstract
The present invention provides siRNA molecules and methods of using such siRNA molecules to modulate an immune response and to silence expression of a target gene.
111 Citations
28 Claims
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1. A nucleic acid-lipid particle comprising:
-
(a) a modified siRNA comprising a double-stranded sequence of about 15 to about 30 nucleotides in length, said sequence comprising a non-immunostimulatory mismatch motif relative to an unmodified siRNA sequence that is capable of silencing expression of a target sequence, wherein the mismatch motif consists of a 5′
-XX′
-3′
dinucleotide corresponding to a 5′
-GU-3′
dinucleotide in the sense or antisense strand of the unmodified siRNA sequence, wherein X and X′
are independently selected from the group consisting of A, U, C, and G, with the proviso that if X is G, X′
is not U and if X′
is U, X is not G,wherein the modified siRNA is less immunogenic than the unmodified siRNA sequence, and wherein the modified siRNA is capable of silencing expression of the target sequence; (b) a cationic lipid, wherein said cationic lipid is selected from the group consisting of 1,2-DiLinoleyloxy-N,N-dimethylaminopropane (DLinDMA), 1,2-Dilinolenyloxy-N,N-dimethylaminopropane (DLenDMA), and a mixture thereof; (c) a non-cationic lipid; and (d) a conjugated lipid that inhibits aggregation of particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification