Compositions and methods for nanoparticle lyophile forms

1. A process for making a solid lyophile, the process comprising:

synthesizing lipid nanoparticles, wherein the lipid nanoparticles encapsulate one or more nucleic acid active agents;

providing an aqueous suspension of the lipid nanoparticles in a pharmaceutically acceptable solution;

adding a dextrin compound to the solution containing the lipid nanoparticles;

adding a saccharide sugar compound to the solution containing the lipid nanoparticles; and

lyophilizing the solution containing the lipid nanoparticles, thereby forming the solid lyophile;

wherein the total amount of the dextrin and saccharide sugar compounds is 10% (w/v) of the solution containing the lipid nanoparticles;

wherein the dextrin compound is 40% (w/v) of the total amount of the dextrin and saccharide sugar compounds;

wherein the lipid nanoparticles comprise a compound selected from compound A6, compound A9, compound AA, compound AB, compound C2, compound F5, compound F7, compound C24, and HEDC;

wherein compound A6 is

compound A9 is

compound AA is

compound AB is

compound C2 is

compound F5 is

compound F7 is

compound C24 is

wherein upon reconstitution of the solid lyophile without filtering, the average size of the nanoparticles is within 5% of their size in the solution containing the lipid nanoparticles prior to lyophilization, with PDI less than or equal to 0.15;

wherein the dextrin compound is (2-hydroxypropyl)-β-cyclodextrin; and

wherein the saccharide sugar compound is sucrose.

2. The process of claim 1 , wherein the nanoparticles have an average diameter of from 45 nm to 110 nm.

3. The process of claim 1 , wherein the concentration of the nucleic acid active agents is from 1 mg/mL to 10 mg/mL.

4. The process of claim 1 , wherein the one or more nucleic acid active agents are RNAi molecules capable of mediating RNA interference.