WO2023112939A1 - 組成物の純化方法 - Google Patents
組成物の純化方法 Download PDFInfo
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- WO2023112939A1 WO2023112939A1 PCT/JP2022/045954 JP2022045954W WO2023112939A1 WO 2023112939 A1 WO2023112939 A1 WO 2023112939A1 JP 2022045954 W JP2022045954 W JP 2022045954W WO 2023112939 A1 WO2023112939 A1 WO 2023112939A1
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Classifications
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- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/16—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing nitrogen, e.g. nitro-, nitroso-, azo-compounds, nitriles, cyanates
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- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/16—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing nitrogen, e.g. nitro-, nitroso-, azo-compounds, nitriles, cyanates
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- A61K47/183—Amino acids, e.g. glycine, EDTA or aspartame
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- C—CHEMISTRY; METALLURGY
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C219/00—Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton
- C07C219/02—Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton
- C07C219/04—Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
- C07C219/06—Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having the hydroxy groups esterified by carboxylic acids having the esterifying carboxyl groups bound to hydrogen atoms or to acyclic carbon atoms of an acyclic saturated carbon skeleton
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C219/00—Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton
- C07C219/02—Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton
- C07C219/04—Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
- C07C219/08—Compounds containing amino and esterified hydroxy groups bound to the same carbon skeleton having esterified hydroxy groups and amino groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having at least one of the hydroxy groups esterified by a carboxylic acid having the esterifying carboxyl group bound to an acyclic carbon atom of an acyclic unsaturated carbon skeleton
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
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- C07C229/00—Compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C229/02—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton
- C07C229/04—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated
- C07C229/06—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton
- C07C229/10—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings
- C07C229/12—Compounds containing amino and carboxyl groups bound to the same carbon skeleton having amino and carboxyl groups bound to acyclic carbon atoms of the same carbon skeleton the carbon skeleton being acyclic and saturated having only one amino and one carboxyl group bound to the carbon skeleton the nitrogen atom of the amino group being further bound to acyclic carbon atoms or to carbon atoms of rings other than six-membered aromatic rings to carbon atoms of acyclic carbon skeletons
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- C—CHEMISTRY; METALLURGY
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- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
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Definitions
- the drugs administered to the body are metabolized in the liver and excreted through the kidneys before reaching the target site (on-target) such as receptors and genes. In addition, they may act on off-target sites and cause side effects.
- Lipid nanoparticles encapsulating drugs are known as DDS.
- Patent Document 1 and Non-Patent Document 1 describe lipid nanoparticles encapsulating siRNA.
- Patent Document 1 and Non-Patent Document 1 disclose that lipid nanoparticles encapsulating siRNA are useful for cancer immunotherapy and the like by knockdown using siRNA targeting immunosuppressive factors of dendritic cells. is described.
- a method for purifying a composition comprising a step of dissolving a composition containing a compound represented by the following formula (1) in an aqueous layer and performing liquid-liquid extraction to purify the compound represented by the following formula (1), , the oil layer used in the liquid-liquid extraction is selected from the group consisting of ketone-based liquids, ester-based liquids, and ether-based liquids having a solubility parameter (SP value) of 14.8 to 20.5 (MPa 1/2 ).
- SP value solubility parameter
- R 1 represents -N(R 2 )-R 2 (wherein each R 2 independently represents a C1-C4 alkyl group), and R 3 represents a C3-C8 represents an alkanediyl group, R 4 represents a C3-C8 alkanediyl group, R 5 represents a hydroxyl group, R 6 each independently represents -R 7 -OH (wherein R 7 represents a C4-C12 alkanediyl group) or a hydrogen atom, and n is an integer of 0 or 1.
- R 1 represents -N(R 2 )-R 2 (wherein each R 2 independently represents a C1-C4 alkyl group), and R 3 represents a C3-C8 represents an alkanediyl group, R 4 represents a C3-C8 alkanediyl group, R 5 represents a hydroxyl group or a hydrogen atom, R 9 each independently represents -R 7 -OC(O)-R 10 or - O—C(O)—R 10 wherein R 7 represents a C4-C12 alkanediyl group and R 10 represents a C4-C25 alkenyl group, wherein at least one R 9 is —R 7 —O—C(O)—R 10 and n is an integer of 0 or 1; ] [4]
- FIG. 1 shows the reaction of scheme (I).
- FIG. 2 shows the reaction of scheme (II).
- FIG. 3 shows the reaction of scheme (III).
- the present invention provides a composition comprising a step of dissolving a composition containing a compound represented by the following formula (1) in an aqueous layer and performing liquid-liquid extraction to purify the compound represented by the following formula (1): wherein the oil layer used in the liquid-liquid extraction is from a ketone-based liquid, an ester-based liquid, and an ether-based liquid with a solubility parameter (SP value) of 14.8 to 20.5 (MPa 1/2 )
- SP value solubility parameter
- a purification method comprising one or more liquids selected from the group consisting of:
- R 1 represents -N(R 2 )-R 2 (wherein each R 2 independently represents a C1-C4 alkyl group), and R 3 represents a C3-C8 alkane. represents a diyl group, R 4 represents a C3-C8 alkanediyl group, R 5 represents a hydroxyl group, and R 6 represents -R 7 -OH (wherein R 7 represents a C4-C12 alkanediyl group; ) or a hydrogen atom, and n is an integer of 0 or 1.
- the compound represented by the above formula (1) can be purified to remove contaminants, and the composition (lipid) described later can be produced. Then, when lipid nanoparticles encapsulating siRNA are produced with this lipid, compared with the case where the purification method of the present embodiment is not performed, the pharmacokinetics of the lipid nanoparticles to the target site is improved, and It is possible to suppress the decrease in target gene knockdown efficiency.
- improving pharmacokinetics means increasing the proportion of lipid nanoparticles delivered to the target site among the administered lipid nanoparticles.
- a composition containing the compound represented by formula (1) above can be obtained, for example, by the reaction of scheme (I) shown in FIG.
- R 2 and R 7 are the same as in the above formula (1), each R 2 independently represents a C1-C4 alkyl group, and each R 7 independently represents a C4-C12 alkanediyl group. and R 8 represents a protecting group.
- R 2 and R 7 are the same as in the above formula (1), each R 2 independently represents a C1-C4 alkyl group, and each R 7 independently represents a C4-C12 alkanediyl group. and R 8 represents a protecting group.
- protective group for R 8 those commonly used as protective groups for hydroxyl groups can be appropriately used. Specific examples include tert-butyldimethylsilyl group, trimethylsilyl group, triethylsilyl group, benzyl group, tert-butyl group, methoxymethyl group, 2-tetrahydropyranyl group, acetyl group, benzoyl group and the like.
- Liquid-liquid extraction is a separation/concentration method that utilizes the distribution of solutes between two immiscible liquids.
- the composition containing the compound represented by the above formula (1) is dissolved in an aqueous layer, and extraction is performed between this and an immiscible oil layer.
- the oil layer used in liquid-liquid extraction is selected from the group consisting of ketone-based liquids, ester-based liquids and ether-based liquids having a solubility parameter (SP value) of 14.8 to 20.5 (MPa 1/2 ). A seed or two or more liquids are used. Liquid-liquid extraction can be performed under normal conditions.
- R 1 represents -N(R 2 )-R 2 (wherein each R 2 independently represents a C1-C4 alkyl group), and R 3 represents a C3-C8 , each R 7 independently represents a C4-C12 alkanediyl group, and each R 10 independently represents a C4-C25 alkenyl group. ]
- R 1 represents -N(R 2 )-R 2 (wherein each R 2 independently represents a C1-C4 alkyl group), and R 3 represents a C3-C8 R 4 represents a C3-C8 alkanediyl group, R 7 independently represents a C4-C12 alkanediyl group, and R 10 independently represents a C4-C25 alkenyl group. . ]
- composition of this embodiment can be obtained, for example, by the reaction of scheme (II) shown in FIG. Scheme (II) is a continuation reaction to scheme (I) shown in FIG.
- R 2 and R 7 are the same as in the above formula (1), each R 2 independently represents a C1-C4 alkyl group, and each R 7 independently represents a C4-C12 alkanediyl group. indicates Each R 10 independently represents a C4-C25 alkenyl group.
- R 6 is converted to R 9 (wherein X is a halogen atom) by reacting a composition containing compounds 5, 5′ and 5′′ with X—C(O)—R 10 and R 9 represents -R 7 -OC(O)-R 10 or -OC(O)-R 10. ).
- the composition of this embodiment contains one or more compounds selected from the group consisting of the compounds (2-1), (2-2) and (2-3), and is included in the composition.
- the total content of compound (2-1), compound (2-2) and compound (2-3) is 90% by mass or more, preferably 95% by mass or more, more preferably 98% by mass or more, and still more preferably is 99% by mass or more, and the remainder contains contaminants.
- the composition of the present embodiment can be obtained by removing contaminants by carrying out the above-described method for purifying the composition.
- the composition of the present embodiment preferably contains 85 to 99% by mass of the compound (2-1) contained in the composition.
- the total content of compound (2-2) and compound (2-3) contained in the composition is preferably 0.1 to 15% by mass.
- n is 0, one of R 9 is —R 7 —O—C(O)—R 10 and the other of R 9 is —O It provides a compound (2-2) wherein —C(O)—R 10 and R 5 is a hydrogen atom.
- the general formula of compound (2-2) is as described above.
- the present invention contains one or more compounds selected from the group consisting of compounds (2-1), (2-2) and (2-3) above, and in the composition
- the total content of compound (2-1), compound (2-2) and compound (2-3) is 90% by mass or more, preferably 95% by mass or more, more preferably 98% by mass or more, and further Provided are drug-encapsulating lipid nanoparticles formed from a composition, preferably 99% by mass or more.
- lipid nanoparticles in this specification refer to particles with a particle size of 10 nm to 1,000 nm, the main component of which is lipid. Lipid nanoparticles are also referred to as “Lipid Nanoparticles” (LNP).
- LNP Lipid Nanoparticles
- the lipid nanoparticles of the present embodiment have reduced contamination with adversely affecting contaminants, so they have good pharmacokinetics to the target site. Also, when the drug is siRNA, the knockdown efficiency of the target gene is high.
- the lipid nanoparticles of the present embodiment can be formed from the composition from which contaminants have been removed by performing the above-described method for purifying the composition.
- lipid component of the lipid nanoparticles only one or two or more compounds selected from the group consisting of the above compounds (2-1), (2-2) and (2-3) may be used, In general, for example, lipid nanoparticles are combined with one or more lipids selected from the group consisting of phospholipids, glycolipids, sterols, saturated or unsaturated fatty acids, and saturated or unsaturated fatty acid esters. form particles.
- lipids selected from the group consisting of phospholipids, glycolipids, sterols, saturated or unsaturated fatty acids, and saturated or unsaturated fatty acid esters. form particles.
- the combination of multiple lipids and the blending ratio thereof can be appropriately adjusted according to the purpose.
- Phospholipids and phospholipid derivatives include, for example, phosphatidylethanolamine, phosphatidylcholine, phosphatidylserine, phosphatidylinositol, phosphatidylglycerol, cardiolipin, sphingomyelin, ceramide phosphorylethanolamine, ceramide phosphorylglycerol, ceramide phosphorylglycerol phosphate, 1 ,2-dimyristoyl-1,2-deoxyphosphatidylcholine, distearoylphosphatidylcholine, plasmalogen, phosphatidic acid and the like, and these can be used singly or in combination of two or more.
- Glycolipids include, for example, glyceroglycolipids (e.g., sulfoxyribosylglyceride, diglycosyldiglyceride, digalactosyldiglyceride, galactosyldiglyceride, glycosyldiglyceride), glycosphingolipids (e.g., galactosylcerebroside, lactosylcerebroside, ganglioside), and the like. mentioned.
- glyceroglycolipids e.g., sulfoxyribosylglyceride, diglycosyldiglyceride, digalactosyldiglyceride, galactosyldiglyceride, glycosyldiglyceride
- glycosphingolipids e.g., galactosylcerebroside, lactosylcerebroside, ganglioside
- sterols examples include animal-derived sterols (e.g., cholesterol, cholesterol succinate, lanosterol, dihydrolanosterol, desmosterol, dihydrocholesterol), plant-derived sterols (phytosterols) (e.g., stigmasterol, sitosterol, campesterol, Brassicasterol), microorganism-derived sterols (eg, zymosterol, ergosterol), and the like.
- animal-derived sterols e.g., cholesterol, cholesterol succinate, lanosterol, dihydrolanosterol, desmosterol, dihydrocholesterol
- plant-derived sterols e.g., stigmasterol, sitosterol, campesterol, Brassicasterol
- microorganism-derived sterols eg, zymosterol, ergosterol
- saturated or unsaturated fatty acids include saturated or unsaturated fatty acids having 12 to 20 carbon atoms such as palmitic acid, oleic acid, stearic acid, arachidonic acid and myristic acid.
- the size of the lipid nanoparticles in the dispersed state can be appropriately selected according to the purpose.
- the average particle size of lipid nanoparticles means the number average particle size measured by DLS. Measurement by DLS can be performed by a conventional method using a commercially available DLS device or the like.
- the polydispersity index (PDI) is about 0.05-0.1, preferably about 0.06-0.08, more preferably about 0.07.
- the composition of the aqueous solvent (dispersion medium) is not particularly limited. can be done.
- These aqueous solvents (dispersion media) can stably disperse lipid nanoparticles, and furthermore, monosaccharides such as glucose, galactose, mannose, fructose, inositol, ribose, xylose sugar, lactose, sucrose, cellobiose, trehalose, Disaccharides such as maltose, trisaccharides such as raffinose and melezinose, polysaccharides such as cyclodextrin, sugars (aqueous solutions) such as sugar alcohols such as erythritol, xylitol, sorbitol, mannitol and maltitol, glycerin, diglycerin and polyglycerin , Polyhydric alcohol (aqueous solution) such as propylene glycol, polypropylene glycol,
- lipid nanoparticles may be added.
- electrolytes in the aqueous solvent it is preferable to eliminate electrolytes in the aqueous solvent as much as possible from the viewpoint of physical stability such as inhibition of aggregation.
- lipid nanoparticles for example, monosaccharides of glucose, galactose, mannose, fructose, inositol, ribose, xylose sugar; lactose, sucrose, cellobiose, trehalose, Disaccharides such as maltose; trisaccharides such as raffinose and melezinose; polysaccharides such as cyclodextrin; sugar alcohols such as erythritol, xylitol, sorbitol, mannitol and maltitol; Sometimes.
- the above sugars, glycerin, diglycerin, polyglycerin, propylene glycol, polypropylene glycol, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, ethylene glycol monoalkyl ether , diethylene glycol monoalkyl ether, 1,3-butylene glycol, and other polyhydric alcohols (aqueous solutions) may improve stability.
- the drug to be encapsulated in the lipid nanoparticles of this embodiment is not particularly limited.
- active ingredients of any medicine such as antitumor agents, anti-inflammatory agents, antibacterial agents, and antiviral agents, sugars, peptides, low-molecular-weight compounds, metals
- Any substance, such as a chemical compound, can be encapsulated in the lipid nanoparticles.
- One type of these may be included alone, or two or more types may be mixed and included.
- siRNA small interfering RNA
- RNAi RNA interference
- genes can be knocked down by RNA interference using siRNA, it is expected to be used as a medicine and applied in the therapeutic field of cancer and the like.
- the type of siRNA that can be used is not particularly limited, and any siRNA can be used as long as it can cause RNA interference.
- an RNA having a structure in which the 3′ portion of the RNA strand protrudes by two bases and each strand has a phosphate group at the 5′ end and a hydroxyl group at the 3′ end can be used as siRNA.
- siRNAs in which the hydroxyl group at the 2'-position of the ribose backbone is partially substituted with a methoxy group, fluoro group or methoxyethyl group, and the phosphodiester bond is partially substituted with a phosphorothioate bond.
- the form of the lipid nanoparticles of the present embodiment is not particularly limited. is mentioned.
- composition (1-3) containing compound (4-1-1), compound (4-2-1), and compound (4-3-1)
- composition (1-3) containing compound (4-1-1), compound (4-2-1), and compound (4-3-1)
- tetrahydrofuran was added to 12.4 g of the composition of Experimental Example 1-2 and cooled to 4°C.
- 7.38 mL (54.0 mmol) of dipropylamine was added to the flask and reacted at room temperature for 11 days. After distilling off the solvent using a rotary evaporator, the residue was suspended in ethyl acetate and separated and washed with 0.5N sodium hydroxide aqueous solution and saturated brine.
- siRNA-encapsulating lipid nanoparticles (LNP2 to LNP11) were produced in the same manner except that compositions (3-2) to (3-11) were used instead of composition (3-1). .
- each excised organ was diluted with PBS containing 0.25% Triton X-100 and homogenized with a bead crusher. Subsequently, the protein was heat denatured by treatment at 95° C. for 10 minutes. Subsequently, each sample was allowed to stand on ice for 5 minutes, and then centrifuged at 20,000 xg at 4°C for 20 minutes. Subsequently, the supernatant of each sample was treated at 95° C. for 10 minutes, and RNA reverse transcription reaction was performed. A commercially available kit (product name "TaqMan MicroRNA Reverse Transcription Kit", Thermo Fisher Scientific) was used for the reverse transcription reaction. The reaction conditions were 16° C. for 30 minutes, followed by 42° C. for 30 minutes, followed by 85° C. for 5 minutes.
- Example 8 In vivo knockdown activity evaluation of lipid nanoparticles encapsulating siRNA
- the in vivo knockdown activity of lipid nanoparticles encapsulating siRNA was evaluated. Specifically, (LNP1 to LNP11) produced in Experimental Example 6 were added to mice (C57BL/6NCrSlc, 6 weeks old, female, Sankyo Lab Service Co., Ltd.) so that the amount of siRNA was 0.03 mg/kg body weight. Each was administered through the tail vein. Subsequently, mice were euthanized 24 hours later and bled from the inferior vena cava. Blood samples were then centrifuged at 800 xg for 5 minutes at 4°C to obtain plasma samples.
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Abstract
Description
[1]下記式(1)に示す化合物を含む組成物を水層に溶解させて液液抽出し、下記式(1)に示す化合物を精製する工程を含む、組成物の純化方法であって、前記液液抽出で用いる油層が、溶解度パラメーター(SP値)が14.8~20.5(MPa1/2)の、ケトン系液体、エステル系液体及びエーテル系液体からなる群より選択される1種又は2種以上の液体を含む、純化方法。
[2]前記ケトン系液体が、シクロヘキサノン、メチルイソブチルケトン又はジイソプロピルケトンであり、前記エステル系液体が、酢酸エチル又は酢酸ブチルであり、前記エーテル系液体が、ジエチルエーテル、ジプロピルエーテル、シクロペンチルメチルエーテル又はプロピレングリコールモノメチルエーテルアセテートである、[1]に記載の純化方法。
[3]下記式(2)に示す化合物において、nが0であり、R9が2つとも-R7-O-C(O)-R10であり、R5が水酸基である化合物(2-1)、nが0であり、R9の一方が-R7-O-C(O)-R10であり、R9の他方が-O-C(O)-R10であり、R5が水素原子である化合物(2-2)、及び、nが1であり、R9が2つとも-R7-O-C(O)-R10であり、R5が水酸基である化合物(2-3)からなる群より選択される1種又は2種以上の化合物を含み、組成物中に含まれる、化合物(2-1)、化合物(2-2)及び化合物(2-3)の合計の含有割合が90質量%以上である、組成物。
[4]組成物中に含まれる、前記化合物(2-1)の含有割合が85~99質量%である、[3]に記載の組成物。
[5]組成物中に含まれる、前記化合物(2-2)及び前記化合物(2-3)の合計の含有割合が、0.1~15質量%である、[3]又は[4]に記載の組成物。
[6][3]に記載の式(2)において、nが0であり、R9の一方が-R7-O-C(O)-R10であり、R9の他方が-O-C(O)-R10であり、R5が水素原子である化合物。
[7][3]に記載の式(2)において、nが1であり、R9が2つとも-R7-O-C(O)-R10であり、R5が水酸基である化合物。
[8][3]~[5]のいずれかに記載の組成物に含まれる化合物から形成され、薬物を内包する脂質ナノ粒子。
[9]前記薬物がsiRNAである、[8]に記載の脂質ナノ粒子。
一実施形態において、本発明は、下記式(1)に示す化合物を含む組成物を水層に溶解させて液液抽出し、下記式(1)に示す化合物を精製する工程を含む、組成物の純化方法であって、前記液液抽出で用いる油層が、溶解度パラメーター(SP値)が14.8~20.5(MPa1/2)の、ケトン系液体、エステル系液体及びエーテル系液体からなる群より選択される1種又は2種以上の液体を含む、純化方法を提供する。
一実施形態において、本発明は、下記式(2)に示す化合物において、nが0であり、R9が2つとも-R7-O-C(O)-R10であり、R5が水酸基である化合物(2-1)、nが0であり、R9の一方が-R7-O-C(O)-R10であり、R9の他方が-O-C(O)-R10であり、R5が水素原子である化合物(2-2)、及び、nが1であり、R9が2つとも-R7-O-C(O)-R10であり、R5が水酸基である化合物(2-3)からなる群より選択される1種又は2種以上の化合物を含み、組成物中に含まれる、化合物(2-1)、化合物(2-2)及び化合物(2-3)の合計の含有割合が90質量%以上である、組成物を提供する。
一実施形態において、本発明は、上記式(2)において、nが0であり、R9の一方が-R7-O-C(O)-R10であり、R9の他方が-O-C(O)-R10であり、R5が水素原子である化合物(2-2)を提供する。化合物(2-2)の一般式は上述した通りである。
一実施形態において、本発明は、上記化合物(2-1)、(2-2)及び(2-3)からなる群より選択される1種又は2種以上の化合物を含み、組成物中に含まれる、化合物(2-1)、化合物(2-2)及び化合物(2-3)の合計の含有割合が90質量%以上、好ましくは95質量%以上、より好ましくは98質量%以上、更に好ましくは99質量%以上である、組成物から形成され、薬物を内包する脂質ナノ粒子を提供する。
(純化前の組成物の調製)
図3に示すスキーム(III)にしたがって、化合物(4-1-1)、化合物(4-2-1)、及び化合物(4-3-1)を含む純化前の組成物(組成物(1-1))を調製した。
(化合物(2-1-1)、化合物(2-2-1)、及び化合物(2-3-1)を含む組成物の調製)
26mLの乾燥ジエチルエーテルに(6-ブロモヘキシルオキシ)tert-ブチルジメチルシラン26.0g(88.0mmol)を溶解し溶液を調製した。アルゴン雰囲気下、上記溶液1mL、乾燥ジエチルエーテル4mL、削り屑状マグネシウム2.35g(96.8mmol)をフラスコに加え、続いてヨウ素一欠片加えた。溶液全体が褐色に変化するまで室温で静置した後、オイルバスで40℃に加熱しながら撹拌し、脱色を確認した後、上記(6-ブロモヘキシルオキシ)tert-ブチルジメチルシラン溶液をフラスコに滴下した。40℃で2時間反応させた後、氷冷した。続いて、乾燥ジエチルエーテル3.67mLに溶解したδ-バレロラクトン3.67mL(39.6mmol)をフラスコに滴下し、室温で一晩反応させた。氷冷し、ジエチルエーテルを加えて希釈し、飽和クエン酸水溶液をフラスコに滴下することで残留したマグネシウムを溶解させた。有機層を水及び飽和食塩水で分液洗浄した。続いて、有機層に無水硫酸ナトリウムを加えて脱水した。これを濾過した後、ロータリーエバポレーターを用いて溶媒を留去し、化合物(2-1-1)、化合物(2-2-1)、及び化合物(2-3-1)を含む組成物(実験例1-1の組成物)を得た。組成物(1-1)中に含まれる、化合物(2-1-1)、化合物(2-2-1)、及び化合物(2-3-1)の含有割合は、化合物(2-1-1):化合物(2-2-1):化合物(2-3-1)=99.0:0.2:0.8であった。
(化合物(3-1-1)、化合物(3-2-1)、及び化合物(3-3-1)を含む組成物(組成物(1-2))の調製)
フラスコ中で、実験例1-1の組成物14.0gを50mLのジクロロメタンに溶解し、N, N-ジメチル-4-アミノピリジン(DMAP)321mg(2.63mmol)とジイソプロピルエチルアミン5.50mL(39.5mmol)を加え、氷冷した。p-トルエンスルホニルクロリド6.02g(31.6mmol)をフラスコに徐々に加えていった後、室温で一晩反応させた。ロータリーエバポレーターを用いて溶媒を留去した後、酢酸エチルで懸濁し、水及び飽和食塩水で分液洗浄した。有機層に無水硫酸ナトリウムを加えて脱水して、これを濾過した後、ロータリーエバポレーターを用いて溶媒を留去し、化合物(3-1-1)、化合物(3-2-1)、及び化合物(3-3-1)を含む組成物(実験例1-2の組成物)を得た。
(化合物(4-1-1)、化合物(4-2-1)、及び化合物(4-3-1)を含む組成物(組成物(1-3))の調製)
フラスコ中で、実験例1-2の組成物12.4gに30mLのテトラヒドロフランを加え、4℃に冷却した。続いて、ジプロピルアミン7.38mL(54.0mmol)をフラスコに加えた後、室温で11日間反応させた。ロータリーエバポレーターを用いて溶媒を留去した後、酢酸エチルで懸濁し、0.5N水酸化ナトリウム水溶液及び飽和食塩水で分液洗浄した。有機層に無水硫酸ナトリウムを加えて脱水した。これを濾過した後、ロータリーエバポレーターを用いて溶媒を留去し、化合物(4-1-1)、化合物(4-2-1)、及び化合物(4-3-1)を含む組成物(実験例1-3の組成物)を得た。
(化合物(5-1-1)、化合物(5-2-1)、及び化合物(5-3-1)を含む組成物の調製)
フラスコ中で、実験例1-3の組成物7.27gに酢酸2.23mL(39mmol)及び26mLの1.0Mテトラブチルアンモニウムフルオリド(TBAF)のテトラヒドロフラン溶液を加え、室温で一晩反応させた。ロータリーエバポレーターを用いて溶媒を留去し、化合物(5-1-1)、化合物(5-2-1)、及び化合物(5-3-1)を含む組成物(組成物(1-1))を得た。
(純化前の組成物(組成物(1-2))の調製)
実験例1-1において、δ-バレロラクトン3.34mL(36.0mmol)を用いた以外は同様の操作にて、化合物(2-1-1):化合物(2-2-1):化合物(2-3-1)=92.5:7.0:0.5の含有割合で含まれる組成物を得た。続いて、実験例1-2、実験例1-3、及び実験例1-4と同様の操作にて、組成物(1-2)を得た。
(純化前の組成物(組成物(1-3))の調製)
実験例1-1において、δ-バレロラクトン4.04mL(43.6mmol)を用いた以外は同様の操作にて、化合物(2-1-1):化合物(2-2-1):化合物(2-3-1)=85.0:0.0:15.0の含有割合で含まれる組成物を得た。続いて、実験例1-2、実験例1-3、及び実験例1-4と同様の操作にて、組成物(1-3)を得た。
(組成物の純化)
化合物(5-1-1)、化合物(5-2-1)、及び化合物(5-3-1)を含む組成物(組成物(1-1)、組成物(1-2)、及び組成物(1-3))(それぞれ9.5g)を、それぞれ0.5N塩酸水溶液(150mL)に溶解させ、表1に記載の溶媒(100mL)をそれぞれ投入後、10分間攪拌した。続いて、分液漏斗で分液し、水層を回収した。この際、TLC分析にて有機層に含まれる不純物が消失するか、又は変化がなくなるまで繰り返し分液洗浄した。その後、回収した水層に5M水酸化ナトリウム水溶液(30mL)を投入し、10分間攪拌した。さらに酢酸エチル(100mL)を投入し、10分間攪拌した。その後、溶液を分液漏斗で分液し、有機層を回収した。回収した有機層を飽和食塩水で1回分液洗浄した。有機層に無水硫酸ナトリウムを加えて脱水した。これを濾過した後、ロータリーエバポレーターを用いて溶媒を留去し、純化した組成物を得た。
(化合物(6-1-1)、化合物(6-2-1)、及び化合物(6-3-1)を含む組成物の製造)
図3に示すスキーム(III)にしたがって、化合物(6-1-1)、化合物(6-2-1)、及び化合物(6-3-1)を含む組成物(組成物(3-1)~組成物(3-11))を製造した。
(組成物(3-1)~組成物(3-11)の製造)
フラスコ内で、実験例4で純化した各組成物(組成物(2-1)~組成物(2-11))を、それぞれ5mLのジクロロメタンに溶解した。続いて、オレイルクロリド900mg(3.0mmol)を加えた後、4℃に冷却した。トリエチルアミン(TEA)697μL(5.0mmol)をフラスコに滴下し、室温3時間反応させた。ロータリーエバポレーターを用いて溶媒を留去した後、酢酸エチルで懸濁し、濾過によって不溶物を除去した。ろ液を0.5N水酸化ナトリウム水溶液及び飽和食塩水で分液洗浄した。有機層に無水硫酸ナトリウムを加えて脱水した。これを濾過した後、ロータリーエバポレーターを用いて溶媒を留去し、粗生成物を得た。粗生成物をシリカゲルクロマトグラフィー(溶離溶媒はジクロロエタン及びエタノールの連続勾配)で精製し、化合物(6-1-1)、化合物(6-2-1)、及び化合物(6-3-1)を含む組成物(それぞれ組成物(3-1)~組成物(3-11))を得た。
(組成物(3-1)~組成物(3-11)に含まれる化合物(6-1-1)、化合物(6-2-1)、化合物(6-3-1)及び夾雑物の含有割合の評価)
化合物(6-1-1)、化合物(6-2-1)、及び化合物(6-3-1)を含む組成物(組成物(3-1)~組成物(3-11))を、カラム(C18カラム、1.7μm、内径2.1mm×150mm)、溶離液(20mM酢酸アンモニウム水溶液と20mM酢酸アンモニウムエタノール溶液の連続勾配)を用いたUHPLC(CAD)により分離分析した。評価結果を下記表2に示す。
(siRNAを内包する脂質ナノ粒子の製造)
組成物(3-1)1.83mg、リン脂質(DSPC、カタログ番号「COATSOME MC-8080」、油化産業)0.158mg、コレステロール(カタログ番号「C8667」、シグマ-アルドリッチ)0.696mg、PEG脂質(PEG-DMG、製品名「SUNBRIGHT GM-020」、油化産業)0.0502mgをエタノール0.5mLに溶解させた脂質溶液、及びsiRNA0.0594mgを酢酸緩衝液(pH4)で溶解させたsiRNA溶液1.5mLをフローリアクターにより混合した。混合後の溶液をリン酸緩衝生理食塩水(PBS)で透析し、siRNAを内包する脂質ナノ粒子(LNP1)を製造した。siRNAとしては、配列番号1に示す塩基配列を有する核酸及び配列番号2に示す塩基配列を有する核酸をハイブリダイズさせたものを使用した。このsiRNAは、マウス血液凝固第VII因子のmRNAを標的とするものであった。
(siRNAを内包する脂質ナノ粒子のin vivoにおける体内動態評価)
siRNAを内包する脂質ナノ粒子のin vivoにおける体内動態を評価した。具体的には、実験例6で製造した(LNP1~LNP11)を、マウス(C57BL/6NCrSlc 6週齢、メス、三共ラボサービス社)に、siRNA量が0.03mg/kg体重となるように、それぞれ尾静脈から投与した。続いて、24時間後にマウスを安楽死させ、肝臓及び脾臓を摘出し、液体窒素により凍結させた。
(評価基準)
++:肝臓及び脾臓中のsiRNA量の合計がLNP9の65%以上。
-:肝臓及び脾臓中のsiRNA量の合計がLNP9の65%未満。
(siRNAを内包する脂質ナノ粒子のin vivoにおけるノックダウン活性評価)
siRNAを内包する脂質ナノ粒子のin vivoにおけるノックダウン活性を評価した。具体的には、実験例6で製造した(LNP1~LNP11)を、マウス(C57BL/6NCrSlc 6週齢、メス、三共ラボサービス社)に、siRNA量が0.03mg/kg体重となるように、それぞれ尾静脈から投与した。続いて、24時間後にマウスを安楽死させ、下大静脈から採血した。続いて、血液サンプルを、800×g、4℃で5分間遠心し、血漿サンプルを得た。続いて、BIOPHEN FVIIキット(Hyphen Biomed社)を用いて、各サンプル中の血液凝固第FVII因子量と、脂質ナノ粒子未投与群における血液凝固第FVII因子量を測定し、下記式(1)に基づいて、ノックダウン率を算出した。
ノックダウン率(%)=(1-(サンプル中の血液凝固第FVII因子量/脂質ナノ粒子未投与群における血液凝固第FVII因子量))×100 …(1)
(評価基準)
++:ノックダウン率が70%以上
+:ノックダウン率が30%以上70%未満
-:ノックダウン率が30%未満
Claims (11)
- 下記式(1)に示す化合物を含む組成物を水層に溶解させて液液抽出し、下記式(1)に示す化合物を精製する工程を含む、組成物の純化方法であって、
前記液液抽出で用いる油層が、溶解度パラメーター(SP値)が14.8~20.5(MPa1/2)の、ケトン系液体、エステル系液体及びエーテル系液体からなる群より選択される1種又は2種以上の液体を含む、純化方法。
- 前記ケトン系液体が、シクロヘキサノン、メチルイソブチルケトン又はジイソプロピルケトンであり、前記エステル系液体が、酢酸エチル又は酢酸ブチルであり、前記エーテル系液体が、ジエチルエーテル、ジプロピルエーテル、シクロペンチルメチルエーテル又はプロピレングリコールモノメチルエーテルアセテートである、請求項1に記載の純化方法。
- 下記式(2)に示す化合物において、nが0であり、R9が2つとも-R7-O-C(O)-R10であり、R5が水酸基である化合物(2-1)、nが0であり、R9の一方が-R7-O-C(O)-R10であり、R9の他方が-O-C(O)-R10であり、R5が水素原子である化合物(2-2)、及び、nが1であり、R9が2つとも-R7-O-C(O)-R10であり、R5が水酸基である化合物(2-3)からなる群より選択される1種又は2種以上の化合物を含み、組成物中に含まれる、化合物(2-1)、化合物(2-2)及び化合物(2-3)の合計の含有割合が90質量%以上である、組成物。
- 組成物中に含まれる、前記化合物(2-1)の含有割合が85~99質量%である、請求項3に記載の組成物。
- 組成物中に含まれる、前記化合物(2-2)及び前記化合物(2-3)の合計の含有割合が、0.1~15質量%である、請求項3又は請求項4に記載の組成物。
- 請求項3に記載の式(2)において、nが0であり、R9の一方が-R7-O-C(O)-R10であり、R9の他方が-O-C(O)-R10であり、R5が水素原子である化合物。
- 請求項3に記載の式(2)において、nが1であり、R9が2つとも-R7-O-C(O)-R10であり、R5が水酸基である化合物。
- 請求項3又は請求項4に記載の組成物に含まれる化合物から形成され、薬物を内包する脂質ナノ粒子。
- 請求項5に記載の組成物に含まれる化合物から形成され、薬物を内包する脂質ナノ粒子。
- 前記薬物がsiRNAである、請求項8に記載の脂質ナノ粒子。
- 前記薬物がsiRNAである、請求項9に記載の脂質ナノ粒子。
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