COMPOSITION AND METHOD FOR FREEZE-DRYING PHARMACEUTICAL COMPOSITION CONTAINING ANIONIC DRUG

1 . A composition for freeze-drying of a composition for delivering anionic drug, which comprises:

a composition for delivering anionic drug comprising an anionic drug as an active ingredient, a cationic compound, an amphiphilic block copolymer and one or more salts of polylactic acid selected from the group consisting of the compounds of the following Formulas 1 to 6, wherein the anionic drug forms a complex with the cationic compound by electrostatic interaction, the complex is entrapped in a nanoparticle structure formed by the amphiphilic block copolymer and the salt of polylactic acid; and

sorbitol as a cryoprotectant:

RO—CHZ-[A] n -[B] m —COOM  [Formula 1]

wherein A is —COO—CHZ—; B is —COO—CHY—, —COO—CH 2 CH 2 CH 2 CH 2 CH 2 — or —COO—CH 2 CH 2 OCH 2 ; R is a hydrogen atom, or acetyl, benzoyl, decanoyl, palmitoyl, methyl or ethyl; each of Z and Y is a hydrogen atom, or methyl or phenyl; M is Na, K or Li; n is an integer of from 1 to 30; and m is an integer of from 0 to 20;

RO—CHZ—[COO—CHX] p —[COO—CHY′] g —COO—CHZ—COOM  [Formula 2]

wherein X is methyl; Y′ is a hydrogen atom or phenyl; p is an integer of from 0 to 25, q is an integer of from 0 to 25, with the proviso that p+q is an integer of from 5 to 25; R is a hydrogen atom, or acetyl, benzoyl, decanoyl, palmitoyl, methyl or ethyl; M is Na, K or Li; and Z is a hydrogen atom, methyl or phenyl;

RO-PAD-COO—W-M′  [Formula 3]

wherein W-M′ is

PAD is selected from the group consisting of D,L-polylactic acid, D-polylactic acid, polymandelic acid, copolymer of D,L-lactic acid and glycolic acid, copolymer of D,L-lactic acid and mandelic acid, copolymer of D,L-lactic acid and caprolactone, and copolymer of D,L-lactic acid and 1,4-dioxane-2-one; R is a hydrogen atom, or acetyl, benzoyl, decanoyl, palmitoyl, methyl or ethyl; and M is independently Na, K or Li;

S—O-PAD-COO-Q  [Formula 4]

wherein S is

L is —NR 1 — or —O—, wherein R 1 is a hydrogen atom or C 1-10 alkyl; Q is CH 3 , CH 2 CH 3 , CH 2 CH 2 CH 3 , CH 2 CH 2 CH 2 CH 3 , or CH 2 C 6 H 5 ; a is an integer of from 0 to 4; b is an integer of from 1 to 10; M is Na, K or Li; and PAD is one or more selected from the group consisting of D,L-polylactic acid, D-polylactic acid, polymandelic acid, copolymer of D,L-lactic acid and glycolic acid, copolymer of D,L-lactic acid and mandelic acid, copolymer of D,L-lactic acid and caprolactone, and copolymer of D,L-lactic acid and 1,4-dioxane-2-one;

wherein R′ is -PAD-O—C(O)—CH 2 CH 2 —C(O)—OM, wherein PAD is selected from the group consisting of D,L-polylactic acid, D-polylactic acid, polymandelic acid, copolymer of D,L-lactic acid and glycolic acid, copolymer of D,L-lactic acid and mandelic acid, copolymer of D,L-lactic acid and caprolactone, and copolymer of D,L-lactic acid and 1,4-dioxane-2-one, M is Na, K or Li; and a is an integer of from 1 to 4;

YO—[C(O)—(CHX) a —O-] m —C(O)—R—C(O)—[—O—(CHX′) b —C(O)—] n —OZ  [Formula 6]

wherein X and X′ are independently hydrogen, C 1 -10 alkyl or C 6-20 aryl; Y and Z are independently Na, K or Li; m and n are independently an integer of from 0 to 95, with the proviso that 5<m+n<100; a and b are independently an integer of from 1 to 6; and R is —(CH 2 ) k —, C 2-10 divalent alkenyl, C 6-20 divalent aryl or a combination thereof, wherein k is an integer of from 0 to 10.

2 . The composition for freeze-drying of a composition for delivering anionic drug of claim 1 , which comprises the sorbitol in an amount of 1 to 5,000 parts by weight, based on 1 part by weight of the anionic drug.

3 . The composition for freeze-drying of a composition for delivering anionic drug of claim 1 , wherein the anionic drug is nucleic acid.

4 . The composition for freeze-drying of a composition for delivering anionic drug of claim 1 , wherein the cationic compound is one or more selected from the group consisting of cationic lipids and cationic polymers.

5 . The composition for freeze-drying of a composition for delivering anionic drug of claim 4 , wherein the cationic lipid is one or more selected from the group consisting of N,N-dioleyl-N,N-dimethylammoniumchloride (DODAC), N,N-distearyl-N,N-dimethylammoniumbromide (DDAB), N-(1-(2,3-dioleoyloxy)propyl-N,N,N-trimethylammoniumchloride (DOTAP), N,N-dimethyl-(2,3-dioleoyloxy)propylamine (DODMA), 1,2-diacyl-3-trimethylammonium-propane (TAP), 1,2-diacyl-3-dimethylammonium-propane (DAP), 3β-[N—(N′,N′,N′-trimethylaminoethane)carbamoyl]cholesterol (TC-cholesterol), 3β[N—(N′,N′-dimethylaminoethane)carbamoyl]cholesterol (DC-cholesterol), 3β-[N—(N′-monomethylaminoethane)carbamoyl]cholesterol (MC-cholesterol), 3β-[N-(aminoethane)carbamoyl]cholesterol (AC-cholesterol), cholesteryloxypropane-1-amine (COPA), N—(N′-aminoethane)carbamoylpropanoic tocopherol (AC-tocopherol) and N—(N′-methylaminoethane)carbamoylpropanoic tocopherol (MC-tocopherol).

6 . The composition for freeze-drying of a composition for delivering anionic drug of claim 4 , wherein the cationic lipid is a cationic lipid represented by the following Formula 7:

wherein each of n and m is 0 to 12 with the proviso that 2≤n+m≤12, each of a and b is 1 to 6, and each of R 1 and R 2 is independently selected from the group consisting of saturated and unsaturated C 11-25 hydrocarbons.

7 . The composition for freeze-drying of a composition for delivering anionic drug of claim 6 , wherein each of R 1 and R 2 is independently selected from the group consisting of lauryl, myristyl, palmityl, stearyl, arachidyl, behenyl, lignoceryl, cerotyl, myristoleyl, palmitoleyl, sapienyl, oleyl, linoleyl, arachidonyl, eicosapentaenyl, erucyl, docosahexaenyl and cerotyl.

8 . The composition for freeze-drying of a composition for delivering anionic drug of claim 1 , wherein the amphiphilic block copolymer is an A-B type di-block copolymer comprising a hydrophilic A block and a hydrophobic B block, wherein the hydrophilic A block is one or more selected from the group consisting of polyalkyleneglycol, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide and derivatives thereof, and the hydrophobic B block is one or more selected from the group consisting of polyester, polyanhydride, polyamino acid, polyorthoester and polyphosphazine.

9 . The composition for freeze-drying of a composition for delivering anionic drug of claim 8 , wherein a hydroxyl group at the end of the hydrophobic B block is modified by one or more selected from the group consisting of cholesterol, tocopherol and C 10-24 fatty acid.

10 . The composition for freeze-drying of a composition for delivering anionic drug of claim 1 , further comprising a fusogenic lipid.

11 . The composition for freeze-drying of a composition for delivering anionic drug of claim 10 , wherein the fusogenic lipid is one or more selected from the group consisting of dilauroyl phosphatidylethanolamine, dimyristoyl phosphatidylethanolamine, dipalmitoyl phosphatidylethanolamine, distearoyl phosphatidylethanolamine, dioleoyl phosphatidylethanolamine, dilinoleoyl phosphatidylethanolamine, 1-palmitoyl-2-oleoyl phosphatidylethanolamine, 1,2-diphytanoyl-3-sn-phosphatidylethanolamine, dilauroyl phosphatidylcholine, dimyristoyl phosphatidylcholine, dipalmitoyl phosphatidylcholine, distearoyl phosphatidylcholine, dioleoyl phosphatidylcholine, dilinoleoyl phosphatidylcholine, 1-palmitoyl-2-oleoyl phosphatidylcholine, 1,2-diphytanoyl-3-sn-phosphatidylcholine, dilauroyl phosphatidic acid, dimyristoyl phosphatidic acid, dipalmitoyl phosphatidic acid, distearoyl phosphatidic acid, dioleoyl phosphatidic acid, dilinoleoyl phosphatidic acid, 1-palmitoyl-2-oleoyl phosphatidic acid, 1,2-diphytanoyl-3-sn-phosphatidic acid, cholesterol and tocopherol.

12 . A method for freeze-drying of a composition for delivering anionic drug, comprising conducting the freeze-drying by using a composition according to claim 1 .

13 . A freeze-dried product of a composition for delivering anionic drug freeze-dried by the method according to claim 12 .