Delivering CRISPR therapeutics with lipid nanoparticles
The present invention provides lipid particles comprising therapeutic nucleic acids such as gRNA that target gene expression.
1. A pharmaceutical composition comprising a first population of nucleic acid-lipid particles, wherein the nucleic acid-lipid particles of the first population comprise:
(a) one or more guide RNA (gRNA) sequences that comprise a first sequence that corresponds to a target sequence and a second sequence that is a tracer RNA sequence located 3′ of the first sequence;
(b) a cationic lipid; and
(c) a non-cationic lipid,
which composition further comprises a pharmaceutically acceptable carrier, which composition also comprises a second population of nucleic acid-lipid particles that comprise a mRNA sequence encoding a Cas9, which second population of nucleic acid-lipid particles does not comprise the gRNA as described for the first population of nucleic acid-lipid particles.
2. The pharmaceutical composition of claim 1 , wherein the mRNA sequence encoding the Cas9 further comprises a sequence encoding a nuclear localization signal (NLS).
3. The pharmaceutical composition of claim 1 , wherein the mRNA sequence encoding the Cas9 further comprises a polyA tail, a 5′ untranslated region (UTR) and/or a 3′ UTR.
4. The pharmaceutical composition of claim 1 , wherein the cationic lipid is selected from the group consisting of 1,2-dilinoleyloxy-N,N-dimethylaminopropane (DLinDMA), 1,2-dilinolenyloxy-N,N-dimethylaminopropane (DLenDMA), 1,2-di-γ-linolenyloxy-N,N-dimethylaminopropane (γ-DLenDMA; Compound (15)), 3-((6Z,9Z,28Z,31Z)-heptatriaconta-6,9,28,31-tetraen-19-yloxy)-N,N-dimethylpropan-1-amine (DLin-MP-DMA; Compound (8)), (6Z,9Z,28Z,31Z)-heptatriaconta-6,9,28,31-tetraen-19-yl 4-(dimethylamino)butanoate) (Compound (7)), (6Z,16Z)-12-((Z)-dec-4-enyl)docosa-6,16-dien-11-yl 5-(dimethylamino)pentanoate (Compound (13)), a salt thereof, and a mixture thereof.
5. The pharmaceutical composition of claim 1 , wherein the non-cationic lipid is cholesterol.
6. The pharmaceutical composition of claim 1 , wherein the non-cationic lipid is a phospholipid.
7. The pharmaceutical composition of claim 1 , wherein the first population and the second population of nucleic acid lipid particles each comprise a conjugated lipid that inhibits aggregation of particles.
8. The pharmaceutical composition of claim 7 , wherein the conjugated lipid that inhibits aggregation of particles is a polyethyleneglycol (PEG)-lipid conjugate.
9. The pharmaceutical composition of claim 8 , wherein the PEG-lipid conjugate is a PEG-DAA conjugate.
10. The pharmaceutical composition of claim 7 , wherein the conjugated lipid that inhibits aggregation of particles comprises from about 0.5 mol % to about 3 mol % of the total lipid present in the particle.
11. The pharmaceutical composition of claim 1 , wherein the gRNA is fully encapsulated in the particle.
12. The pharmaceutical composition of claim 1 , wherein the particle has a total lipid:gRNA mass ratio of from about 5:1 to about 15:1.
13. The pharmaceutical composition of claim 1 , wherein the particle has an electron dense core.
14. The pharmaceutical composition of claim 1 , wherein the nucleic acid lipid particles of the first population comprise two different gRNA sequences.
15. A method for silencing expression of a target gene in a cell, the method comprising the step of contacting a cell comprising an expressed target gene with the composition of claim 1 under conditions to silence the expression of the gene within the cell so as to silence expression of the target gene.