WO2023176821A1 - 脂質組成物 - Google Patents
脂質組成物 Download PDFInfo
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- WO2023176821A1 WO2023176821A1 PCT/JP2023/009821 JP2023009821W WO2023176821A1 WO 2023176821 A1 WO2023176821 A1 WO 2023176821A1 JP 2023009821 W JP2023009821 W JP 2023009821W WO 2023176821 A1 WO2023176821 A1 WO 2023176821A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/10—Dispersions; Emulsions
- A61K9/127—Synthetic bilayered vehicles, e.g. liposomes or liposomes with cholesterol as the only non-phosphatidyl surfactant
- A61K9/1271—Non-conventional liposomes, e.g. PEGylated liposomes or liposomes coated or grafted with polymers
- A61K9/1272—Non-conventional liposomes, e.g. PEGylated liposomes or liposomes coated or grafted with polymers comprising non-phosphatidyl surfactants as bilayer-forming substances, e.g. cationic lipids or non-phosphatidyl liposomes coated or grafted with polymers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/56—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids
- A61K31/575—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids substituted in position 17 beta by a chain of three or more carbon atoms, e.g. cholane, cholestane, ergosterol, sitosterol
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/7088—Compounds having three or more nucleosides or nucleotides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/7088—Compounds having three or more nucleosides or nucleotides
- A61K31/713—Double-stranded nucleic acids or oligonucleotides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K48/00—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/51—Nanocapsules; Nanoparticles
- A61K9/5107—Excipients; Inactive ingredients
- A61K9/5123—Organic compounds, e.g. fats, sugars
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- 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
- C12N15/09—Recombinant DNA-technology
- C12N15/87—Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation
- C12N15/88—Introduction of foreign genetic material using processes not otherwise provided for, e.g. co-transformation using microencapsulation, e.g. using amphiphile liposome vesicle
Definitions
- the present invention relates to a lipid composition containing a cholesterol derivative and a lipid.
- nucleic acid medicines have a clear mechanism of action against diseases, have few side effects, and are expected to be the next generation of medicines, and the development of nucleic acid medicines is actively being carried out.
- a method is known in which nucleic acids are encapsulated in liposomes or lipid particles and then administered.
- a lipid having a substituent such as an amino group that becomes a cation at low pH is used as the lipid, and delivery of nucleic acids is achieved by imparting an appropriate charge to the particles.
- Patent Document 1 and Patent Document 2 disclose compounds having an ester group, an acetal group, etc. as a linking group that connects an aliphatic group and an amino group.
- Patent Document 3 discloses a compound having a vinyloxy group, an amide group, an oxime group, or the like as a linking group that connects an aliphatic group and an amino group.
- Patent Document 4 describes lipid nanoparticles containing DLin-MC3-DMA, which is a cationic lipid.
- US Pat. No. 5,030,009 describes cationic lipids useful for delivering drugs to cells and tissues.
- Patent Document 6 the types and composition ratios of lipid compounds to be combined when producing nucleic acid-containing particles are studied.
- the main methods for increasing the efficacy of nucleic acid drugs include methods for improving cellular uptake and methods for improving endosomal escape efficiency.
- Lipid particles containing nucleic acids are generally composed of ionized lipids/helper lipids/cholesterol/polyethylene glycol lipids.
- Non-Patent Document 1 focuses on cholesterol and reports that it improves endosomal escape efficiency.
- Patent Document 7 reports lipid nanoparticles (LNPs) that enable the delivery of nucleic acids to immune cells, particularly T cells and dendritic cells.
- An object of the present invention is to provide a lipid composition that can achieve excellent nucleic acid delivery efficiency.
- the present inventors used a compound represented by formula (1) as a cholesterol derivative, and a lipid represented by formula (2) or a salt thereof as a lipid.
- lipids with , neutral lipids, and nonionic hydrophilic polymers we have found that by using lipids with , neutral lipids, and nonionic hydrophilic polymers, lipid compositions that exhibit excellent nucleic acid delivery efficiency can be obtained.
- the present invention was completed based on the above findings. According to the present invention, the following inventions are provided.
- R 101 is ,or , * indicates the bonding position
- R 201 indicates a chain hydrocarbon group having 7 to 18 carbon atoms, indicates a single bond or a double bond
- R102 is (i) hydrogen atom, (ii) 1 to 4 carbon atoms optionally substituted with one or more substituents selected from OH, SH, COOH, NR 106 R 107 , N(R 108 )C(O)R 109 , or CF 3 hydrocarbon group, (iii) C(O)R 103 or (iv) C(O)NR 104 R 105 ;
- R 103 has 1 to 1 carbon atoms, which may be substituted with one or more substituents selected from OH, SH, COOH, NR 110 R 111 , N(R 112 )C(O)R 113 , or CF 3 4 represents a hydrocarbon group
- R 104 and R 105 are each independently a hydrogen atom, or one or more substituents selected from OH, SH,
- X represents -NR 1 - or -O-
- R 1 represents a hydrogen atom, a hydrocarbon group having 6 to 24 carbon atoms, or a group represented by R 21 -L 1 -R 22 -
- R 21 represents a hydrocarbon group having 1 to 24 carbon atoms
- L 1 is -O(CO)O-, -O(CO)-, -(CO)O-, -O-, or
- R 22 is a divalent linking group and represents a hydrocarbon linking group having 1 to 18 carbon atoms
- R 2 and R 3 each independently represent a hydrogen atom, a hydrocarbon group having 3 to 24 carbon atoms, or a group represented by R 31 -L 2 -R 32 -
- R 31 is a hydrocarbon group having 1 to 24 carbon atoms.
- R 32 is a divalent linking group and represents a hydrocarbon linking group having 1 to 18 carbon atoms
- R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 and R 12 each independently represent a hydrogen atom or an optionally substituted alkyl group having 1 to 18 carbon atoms; , R 4 and R 5 , R 10 and R 5 , R 5 and R 12 , R 4 and R 6 , R 5 and R 6 , R 6 and R 7 , R 6 and R 10 , R 12 and R 7 , and R Any one or more of 7 and R 8 may be linked to each other to form a 4- to 7-membered ring that may contain an O atom,
- the substituent on the alkyl group having 1 to 18 carbon atoms which may be substituted is a hydroxyl
- R 102 is (i) represents a hydrogen atom, or (iv) C(O)NR 104 R 105 , and R 104 and R 105 each independently represent a hydrogen atom, or OH, NR 110 R 111 , or N(R 112 )C( O) represents a hydrocarbon group having 1 to 4 carbon atoms which may be substituted with one or more substituents selected from R 113 , R 110 , R 111 , R 112 and R 113 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms which may be substituted with one or more OH,
- R 101 in formula (1) is shows, R 102 represents C(O)NR 104 R 105 ; R 104 and R 105 are each independently a hydrogen atom, or a carbon group optionally substituted with one or more substituents selected from OH, NR 110 R 111 , or N(R 112 )C(O)R 113 Indicates a hydrocarbon group of numbers 1 to 4, R 110 , R 111 , R 112 and R 113 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms which may be substituted with one or more OH, The lipid composition according to ⁇ 1>.
- R 101 in formula (1) is The lipid composition according to ⁇ 1>, wherein R 102 represents a hydrogen atom, and R 201 represents a chain hydrocarbon group having 7 to 13 carbon atoms.
- R 102 represents a hydrogen atom
- R 201 represents a chain hydrocarbon group having 7 to 13 carbon atoms.
- ⁇ 6> The lipid composition according to any one of ⁇ 1> to ⁇ 5>, wherein the content of the compound represented by formula (1) is 10 mol% to 60 mol% based on the total lipid.
- ⁇ 7> The lipid according to any one of ⁇ 1> to ⁇ 6>, wherein the content of the lipid represented by formula (2) or a salt thereof is 30 mol% to 70 mol% based on the total lipid.
- Composition. ⁇ 8> The lipid composition according to any one of ⁇ 1> to ⁇ 7>, wherein the neutral lipid is a zwitterionic lipid.
- ⁇ 9> The lipid composition according to any one of ⁇ 1> to ⁇ 8>, wherein the neutral lipid is a phospholipid.
- ⁇ 10> The lipid composition according to any one of ⁇ 1> to ⁇ 9>, wherein the content of the neutral lipid is 1 mol % to 30 mol % based on the total lipid.
- lipid according to any one of ⁇ 1> to ⁇ 10> wherein the lipid having the nonionic hydrophilic polymer contains an acyl group, and the acyl group has a carbon chain length of 8 to 26.
- Composition. ⁇ 12> According to any one of ⁇ 1> to ⁇ 11>, the content of the lipid having the nonionic hydrophilic polymer is 0.1 mol% to 10 mol% based on the total lipids.
- lipid composition according to any one of ⁇ 1> to ⁇ 13> which is a composition for introducing a nucleic acid into cells.
- lipid composition according to any one of ⁇ 1> to ⁇ 13> which is a composition for in vivo nucleic acid delivery.
- lipid composition according to any one of ⁇ 1> to ⁇ 15> which is a lipid particle.
- the lipid composition of the present invention can achieve excellent nucleic acid delivery efficiency.
- ⁇ indicates a range that includes the numerical values described before and after it as the minimum and maximum values, respectively.
- the lipid composition of the present invention contains a compound represented by formula (1), a lipid represented by formula (2) or a salt thereof, a neutral lipid, a lipid having a nonionic hydrophilic polymer, and a nucleic acid. . It is a finding discovered for the first time in the present invention that by employing the above configuration, the effect of introducing nucleic acids into cells can be efficiently exhibited, that is, excellent nucleic acid delivery efficiency can be achieved.
- R 101 is ,or , * indicates the bonding position
- R 201 indicates a chain hydrocarbon group having 7 to 18 carbon atoms, indicates a single bond or a double bond
- R102 is (i) hydrogen atom, (ii) 1 to 4 carbon atoms optionally substituted with one or more substituents selected from OH, SH, COOH, NR 106 R 107 , N(R 108 )C(O)R 109 , or CF 3 hydrocarbon group, (iii) C(O)R 103 or (iv) C(O)NR 104 R 105 ;
- R 103 has 1 to 1 carbon atoms, which may be substituted with one or more substituents selected from OH, SH, COOH, NR 110 R 111 , N(R 112 )C(O)R 113 , or CF 3 4 represents a hydrocarbon group
- the chain hydrocarbon group having 7 to 18 carbon atoms in the definition of formula (1) may be either a saturated hydrocarbon group or an unsaturated hydrocarbon group, and may be either linear or branched, but preferably a saturated hydrocarbon group. It is a hydrogen group.
- the hydrocarbon group having 1 to 4 carbon atoms in the definition of formula (1) may be either a saturated hydrocarbon group or an unsaturated hydrocarbon group, and may be either linear or branched, but is preferably a saturated hydrocarbon group. It is.
- hydrocarbon groups having 1 to 4 carbon atoms include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, isobutyl group, tert-butyl group, ethylene group, n -propylene group, isopropylene group, n-butylene group, isobutylene group, etc.
- R 102 is (i) represents a hydrogen atom, or (iv) C(O)NR 104 R 105 , and R 104 and R 105 each independently represent a hydrogen atom, or OH, NR 110 R 111 , or N(R 112 )C( O) represents a hydrocarbon group having 1 to 4 carbon atoms which may be substituted with one or more substituents selected from R 113 , R 110 , R 111 , R 112 and R 113 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms which may be substituted with one or more OH.
- R 101 in formula (1) is shows, R 102 represents C(O)NR 104 R 105 ; R 104 and R 105 are each independently a hydrogen atom, or a carbon group optionally substituted with one or more substituents selected from OH, NR 110 R 111 , or N(R 112 )C(O)R 113 Indicates a hydrocarbon group of numbers 1 to 4, R 110 , R 111 , R 112 and R 113 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms which may be substituted with one or more OH.
- R 101 in formula (1) is , R 102 represents a hydrogen atom, and R 201 represents a chain hydrocarbon group having 7 to 13 carbon atoms.
- the compound represented by formula (1) is a compound represented by any one of the following (A) to (M).
- the CAS registration numbers of compounds (A) to (G) are as follows. Compound (A): CAS 331245-55-7 Compound (B): CAS 331245-51-3 Compound (C): CAS 331245-57-9 Compound (D): CAS 331245-56-8 Compound (E): CAS 104082-35-1 Compound (F): CAS 92588-73-3 Compound (G): CAS 136099-14-4 Among the above, compounds (B), (C), (D) and (G) are more preferred, and compounds (D) and (G) are particularly preferred.
- the compound represented by formula (1) can be synthesized according to the method described in the synthesis of compounds in Examples described later.
- the content of the compound represented by formula (1) is preferably 10 to 80 mol%, more preferably 10 mol% to 60 mol%, and 30 mol% to 50 mol% based on the total lipid. % is more preferable.
- lipid represented by formula (2) or its salt> a lipid represented by the following formula (2) or a salt thereof is used.
- X represents -NR 1 - or -O-
- R 1 represents a hydrogen atom, a hydrocarbon group having 6 to 24 carbon atoms, or a group represented by R 21 -L 1 -R 22 -
- R 21 represents a hydrocarbon group having 1 to 24 carbon atoms
- L 1 is -O(CO)O-, -O(CO)-, -(CO)O-, -O-, or
- R 22 is a divalent linking group and represents a hydrocarbon linking group having 1 to 18 carbon atoms
- R 2 and R 3 each independently represent a hydrogen atom, a hydrocarbon group having 3 to 24 carbon atoms, or a group represented by R 31 -L 2 -R 32 -
- R 31 is a hydrocarbon group having 1 to 24 carbon atoms.
- R 32 is a divalent linking group and represents a hydrocarbon linking group having 1 to 18 carbon atoms
- R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 and R 12 each independently represent a hydrogen atom or an optionally substituted alkyl group having 1 to 18 carbon atoms; , R 4 and R 5 , R 10 and R 5 , R 5 and R 12 , R 4 and R 6 , R 5 and R 6 , R 6 and R 7 , R 6 and R 10 , R 12 and R 7 , and R Any one or more of 7 and R 8 may be linked to each other to form a 4- to 7-membered ring that may contain an O atom,
- the substituent on the alkyl group having 1 to 18 carbon atoms which may be substituted is a hydroxyl
- the hydrocarbon group having 6 to 24 carbon atoms in R 1 and the hydrocarbon group having 3 to 24 carbon atoms in R 2 and R 3 are preferably an alkyl group, an alkenyl group, or an alkynyl group; More preferably, it is a group.
- the alkyl group having 6 to 24 carbon atoms and the alkyl group having 3 to 24 carbon atoms may be linear or branched, and may be chain or cyclic.
- the alkyl group having 6 to 24 carbon atoms is preferably an alkyl group having 6 to 20 carbon atoms, and the alkyl group having 3 to 24 carbon atoms is more preferably an alkyl group having 6 to 20 carbon atoms.
- Examples include pentadecyl group, hexadecyl group, tetramethylhexadecyl group (preferably 3,7,11,15-tetramethylhexadecyl group), heptadecyl group, octadecyl group, nonadecyl group, icosyl group.
- the alkenyl group having 6 to 24 carbon atoms and the alkenyl group having 3 to 24 carbon atoms may be linear or branched, and may be linear or cyclic.
- the alkenyl group having 6 to 24 carbon atoms is preferably an alkenyl group having 6 to 20 carbon atoms, and the alkenyl group having 3 to 24 carbon atoms is more preferably an alkenyl group having 6 to 20 carbon atoms.
- the alkynyl group having 6 to 24 carbon atoms is preferably an alkynyl group having 6 to 20 carbon atoms, and the alkynyl group having 3 to 24 carbon atoms is more preferably an alkynyl group having 6 to 20 carbon atoms.
- alkenyl groups preferably have one or two double bonds, and all of the alkynyl groups preferably have one or two triple bonds.
- the hydrocarbon group having 1 to 24 carbon atoms for R 21 and R 31 is preferably an alkyl group having 10 to 24 carbon atoms, an alkenyl group having 10 to 24 carbon atoms, or an alkynyl group having 10 to 24 carbon atoms. .
- the alkyl group having 10 to 24 carbon atoms may be linear or branched, and may be chain or cyclic.
- the alkyl group having 10 to 24 carbon atoms is preferably an alkyl group having 12 to 24 carbon atoms.
- the alkenyl group having 10 to 24 carbon atoms may be linear or branched, and may be chain or cyclic.
- the alkynyl group having 10 to 24 carbon atoms may be linear or branched, and may be chain or cyclic. Specific examples include decynyl group, undecynyl group, dodecynyl group, tetradecynyl group, pentadecynyl group, hexadecynyl group, heptadecinyl group, octadecynyl group, and the like. All of the above alkenyl groups preferably have one or two double bonds, and all of the alkynyl groups preferably have one or two triple bonds.
- the divalent linking group and hydrocarbon linking group having 1 to 18 carbon atoms for R 22 and R 32 may be an alkylene group having 1 to 18 carbon atoms or an alkenylene group having 2 to 18 carbon atoms.
- the alkylene group having 1 to 18 carbon atoms may be linear or branched, and may be chain or cyclic.
- the number of carbon atoms is preferably 1 to 12, more preferably 1 to 10, and even more preferably 2 to 10.
- methylene group, ethylene group, trimethylene group, tetramethylene group, pentamethylene group, hexamethylene group, heptamethylene group, octamethylene group, nonamethylene group, decamethylene group, undecamethylene group, dodecamethylene group, etc. Can be mentioned.
- the alkenylene group having 2 to 18 carbon atoms may be linear or branched, and may be chain or cyclic.
- the number of carbon atoms is preferably 1 to 12, more preferably 2 to 10 carbon atoms.
- L 1 is -O(CO)O-, -O(CO)-, or -(CO)O-, and more preferably -O(CO)- or -(CO)O-.
- L 2 is -O(CO)O-, -O(CO)-, or -(CO)O-, and more preferably -O(CO)- or -(CO)O-.
- the alkyl group having 1 to 18 carbon atoms in the optionally substituted alkyl group having 1 to 18 carbon atoms for R 4 , R 6 , R 9 , R 10 , R 11 , and R 12 may be linear or branched. It may be chain-like or cyclic. The number of carbon atoms is preferably 1 to 12.
- Examples include octyl group, nonyl group, decyl group, undecyl group, and dodecyl group.
- the substituent is a hydroxyl group, a carboxyl group, -O(CO)O-R 41 , -O(CO)-R 42 , -(CO)O-R 43 , or -O A group represented by -R 44 is preferred, and a group represented by -O(CO)-R 42 or -(CO)O-R 43 is more preferred.
- the alkyl group having 1 to 18 carbon atoms in the optionally substituted alkyl group having 1 to 18 carbon atoms for R 5 , R 7 , and R 8 may be linear or branched, and may be linear or cyclic. It may be.
- the number of carbon atoms is preferably 1 to 12, more preferably 1 to 8.
- Examples include octyl group, nonyl group, decyl group, undecyl group, and dodecyl group.
- the substituent is a hydroxyl group, a carboxyl group, -O(CO)O-R 41 , -O(CO)-R 42 , -(CO)O-R 43 , or -O A group represented by -R 44 is preferred, and a group represented by -O(CO)-R 42 or -(CO)O-R 43 is more preferred.
- Examples of the 4- to 7-membered ring that may contain an O atom include an azetidine ring, a pyrrolidine ring, a piperidine ring, a morpholine ring, and an azepane ring, preferably a 6-membered ring, and a piperidine ring and a morpholine ring.
- the substituent in the optionally substituted alkyl group having 1 to 18 carbon atoms is substituted or unsubstituted.
- the aryl group is an aryl group
- the aryl group preferably has 6 to 22 carbon atoms, more preferably 6 to 18 carbon atoms, and even more preferably 6 to 10 carbon atoms.
- Specific examples include phenyl group, naphthyl group, anthracenyl group, and phenanthrenyl group.
- Substituents on the aryl group include an alkyl group having 1 to 18 carbon atoms, a hydroxyl group, a carboxyl group, an amino group represented by -NR 45 R 46 , -O(CO)O-R 41 , -O(CO) A group represented by -R 42 , -(CO)O-R 43 or -O-R 44 is preferable, and a hydroxyl group or a carboxyl group is more preferable.
- Specific examples of the substituted aryl group include a hydroxyphenyl group and a carboxyphenyl group.
- the substituent in the optionally substituted alkyl group having 1 to 18 carbon atoms is substituted or unsubstituted.
- the heteroaryl group preferably has 1 to 12 carbon atoms, more preferably 1 to 6 carbon atoms.
- Specific examples include a pyridyl group, a pyrazolyl group, an imidazolyl group, a benzimidazolyl group, a thiazolyl group, and an oxazolyl group.
- Substituents on the heteroaryl group include an alkyl group having 1 to 18 carbon atoms, a hydroxyl group, a carboxyl group, an amino group represented by -NR 45 R 46 , -O(CO)O-R 41 , -O(CO )-R 42 , -(CO)O-R 43 , or -O-R 44 is preferable, and a hydroxyl group or a carboxyl group is more preferable.
- Specific examples of the substituted or unsubstituted heteroaryl group include a hydroxypyridyl group, a carboxypyridyl group, a pyridonyl group, and the like.
- the hydrocarbon group having 1 to 18 carbon atoms for R 41 , R 42 , R 43 , R 44 , R 45 and R 46 is an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, or a carbon It is preferably an alkynyl group having 2 to 18 carbon atoms, more preferably an alkyl group having 1 to 18 carbon atoms or an alkenyl group having 2 to 18 carbon atoms.
- the alkyl group having 1 to 18 carbon atoms may be linear or branched, and may be chain or cyclic.
- the number of carbon atoms is preferably 3 to 18, more preferably 5 to 18.
- propyl group isopropyl group, cyclopropyl group, butyl group, isobutyl group, tert-butyl group, cyclobutyl group, pentyl group, cyclopentyl group, hexyl group, cyclohexyl group, heptyl group, octyl group, nonyl group
- Examples include decyl group, undecyl group, dodecyl group, tridecyl group, trimethyldodecyl group (preferably 3,7,11-trimethyldodecyl group), tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, and octadecyl group.
- the alkenyl group having 2 to 18 carbon atoms may be linear or branched, and may be chain or cyclic.
- the number of carbon atoms is preferably 3 to 18, more preferably 5 to 18.
- the alkynyl group having 2 to 18 carbon atoms may be linear or branched, and may be chain or cyclic.
- the number of carbon atoms is preferably 3 to 18, more preferably 5 to 18.
- propargyl group, butynyl group, pentynyl group, hexynyl group, heptynyl group, octynyl group, nonynyl group, decynyl group, undecynyl group, dodecynyl group, tetradecynyl group, pentadecynyl group, hexadecynyl group, heptadecinyl group, octadecynyl group, etc. can be mentioned.
- R 1 is preferably a hydrocarbon group having 6 to 24 carbon atoms or a group represented by R 21 -L 1 -R 22 -.
- one of R 2 and R 3 is a hydrogen atom; the other of R 2 and R 3 is a hydrocarbon group having 6 to 24 carbon atoms, or a group represented by R 31 -L 2 -R 32 - It is preferable that
- R 2 and R 3 are each independently preferably a hydrocarbon group having 6 to 24 carbon atoms or a group represented by R 31 -L 2 -R 32 -.
- R 4 , R 6 , R 9 , R 10 , R 11 and R 12 are preferably hydrogen atoms.
- R 5 is a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkyl group having 1 to 18 carbon atoms which may be substituted with -O(CO)-R 42 or -(CO)OR 43 , or an aryl group
- An alkyl group having 1 to 18 carbon atoms which may be substituted with an alkyl group having 1 to 18 carbon atoms which may be substituted with a hydroxyl group is preferable, and when it is an alkyl group, R 4 , R 6 , R 10 and R 12 may be linked to each other to form a ring which may contain an O atom.
- an alkyl group having 1 to 18 carbon atoms an alkyl group having 1 to 18 carbon atoms which may be substituted with -O(CO)-R 42 or -(CO)O-R 43 , and an aryl group substituted with
- An alkyl group having 1 to 12 carbon atoms which may be optionally substituted with a hydroxyl group, an alkyl group having 1 to 8 carbon atoms which may be substituted with a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, -O(CO)-R 42 or an alkyl group having 1 to 18 carbon atoms which may be substituted with -(CO)O-R 43 is more preferable.
- R 7 and R 8 are each independently a hydrogen atom, a hydrocarbon group having 1 to 18 carbon atoms, a carbon number of 1 to 1, which may be substituted with -O(CO)-R 42 or -(CO)O-R 43 ; 18 alkyl group, an alkyl group having 1 to 8 carbon atoms which may be substituted with an aryl group, or an alkyl group having 1 to 8 carbon atoms which may be substituted with a hydroxyl group, or R 7 and R 8 are mutually Preferably, they are linked to form a 4- to 7-membered ring which may contain an O atom.
- R 5 and R 7 or R 8 are not connected to each other and do not form a ring.
- a+b is 1 or 2, and it is more preferable that it is 1.
- c+d is preferably 1 or 2, more preferably 1.
- the lipid represented by formula (2) is a lipid represented by formula (3) below.
- R 2 and R 3 are each independently a hydrocarbon group having 3 to 24 carbon atoms containing one or more unsaturated bonds, or R 2 and R 3 are each independently a group represented by R 31 -L 2 -R 32 -, or One of R 2 and R 3 is a group represented by R 31 -L 2 -R 32 -, and the other is a hydrocarbon group having 3 to 24 carbon atoms
- R 31 represents a hydrocarbon group having 1 to 24 carbon atoms
- L 2 is -O(CO)O-, -O(CO)-, -(CO)O-, -O-
- R 32 is a divalent linking group and represents a hydrocarbon linking group having 1 to 18 carbon atoms
- R 5 represents an alkyl group having 1 to 18 carbon atoms which may be substituted with -O(CO)-R 42 or -(CO)O-R 43
- R 3 is a divalent linking
- R 2 and R 3 are a group represented by R 31 -L 2 -R 32 -, and the other is a hydrocarbon group having 3 to 24 carbon atoms.
- L 2 preferably represents -O(CO)- or -(CO)O-.
- the lipid represented by formula (2) may form a salt.
- Salts with basic groups include, for example, salts with mineral acids such as hydrochloric acid, hydrobromic acid, nitric acid and sulfuric acid; formic acid, acetic acid, citric acid, oxalic acid, fumaric acid, maleic acid, succinic acid, malic acid, Salts with organic carboxylic acids such as tartaric acid, aspartic acid, trichloroacetic acid and trifluoroacetic acid; and salts with sulfonic acids such as methanesulfonic acid, benzenesulfonic acid, p-toluenesulfonic acid, mesitylenesulfonic acid and naphthalenesulfonic acid.
- mineral acids such as hydrochloric acid, hydrobromic acid, nitric acid and sulfuric acid
- formic acid acetic acid, citric acid, oxalic acid, fumaric acid, maleic acid, succinic
- Salts at acidic groups include, for example, salts with alkali metals such as sodium and potassium; salts with alkaline earth metals such as calcium and magnesium; ammonium salts; and trimethylamine, triethylamine, tributylamine, pyridine, N,N- Nitrogen-containing organic bases such as dimethylaniline, N-methylpiperidine, N-methylmorpholine, diethylamine, dicyclohexylamine, procaine, dibenzylamine, N-benzyl- ⁇ -phenethylamine, 1-ephenamine and N,N'-dibenzylethylenediamine Examples include salt. Among the above-mentioned salts, preferable salts include pharmacologically acceptable salts.
- Preferred specific examples of the lipid represented by formula (2) include 2-pentylheptyl 6-(2-(decanoyloxy)ethyl)-3-ethyl-12-hexyl-10-oxo-9,11-dioxa -3,6-diazahexadecane-16-oate (see WO2021/095876).
- the lipid represented by formula (2) and its manufacturing method are described in WO2019/235635 and WO2021/095876.
- the content of the lipid represented by formula (2) or its salt is preferably 20 mol% to 80 mol%, and 30 mol% to 70 mol% based on the total lipid amount. %, and even more preferably 40 mol% to 60 mol%.
- the lipid composition of the present invention contains neutral lipids.
- the neutral lipid is preferably a zwitterionic lipid.
- phospholipids are preferred, and specific examples include phosphatidylcholine, phosphatidylethanolamine, and sphingomyelin.
- a phospholipid having a choline group such as phosphatidylcholine is preferred.
- the zwitterionic lipid may be used alone or in combination with a plurality of different neutral lipids.
- phosphatidylcholine examples include, but are not limited to, soybean lecithin (SPC), hydrogenated soybean lecithin (HSPC), egg yolk lecithin (EPC), hydrogenated egg yolk lecithin (HEPC), dimyristoylphosphatidylcholine (DMPC), and dipalmitoylphosphatidylcholine (DPPC).
- SPC soybean lecithin
- HSPC hydrogenated soybean lecithin
- EPC egg yolk lecithin
- HEPC hydrogenated egg yolk lecithin
- DMPC dimyristoylphosphatidylcholine
- DPPC dipalmitoylphosphatidylcholine
- DSPC distearoylphosphatidylcholine
- DOPC dioleoylphosphatidylcholine
- DLPC 1-palmitoyl-2-oleoylphosphatidylcholine
- POPC 1-palmitoyl-2-oleoylphosphatidylcho
- DMPC dimyristoylphosphatidylcholine
- DSPC distearoylphosphatidylcholine
- DLPC dilauroylphosphatidylcholine
- DSPC distearoylphosphatidylcholine
- Phosphatidylethanolamines are not particularly limited, but include dimyristoylphosphatidylethanolamine (DMPE), dipalmitoylphosphatidylethanolamine (DPPE), distearoylphosphatidylethanolamine (DSPE), dioleoylphosphatidylethanolamine (DOPE), and dilinoleoyl.
- DMPE dimyristoylphosphatidylethanolamine
- DPPE dipalmitoylphosphatidylethanolamine
- DSPE distearoylphosphatidylethanolamine
- DOPE dioleoylphosphatidylethanolamine
- dilinoleoyl dilinoleoyl.
- Phosphatidylethanolamine DLoPE
- D(Phy)PE diphytanoylphosphatidylethanolamine
- POPE 1-palmitoyl-2-oleoylphosphatidylethanolamine
- ditetradecylphosphatidylethanolamine dihexadecylphosphatidylethanolamine
- Examples include dioctadecylphosphatidylethanolamine and diphytanylphosphatidylethanolamine.
- sphingomyelin examples include, but are not limited to, sphingomyelin derived from egg yolk and sphingomyelin derived from milk.
- the content of neutral lipids is preferably 1 to 30 mol%, more preferably 5 to 25 mol%, and 7 to 23 mol% based on the total lipids. It is even more preferable that there be.
- the lipid composition of the present invention includes a lipid having a nonionic hydrophilic polymer.
- the lipid having a nonionic hydrophilic polymer preferably contains an acyl group, and the acyl group preferably has a carbon chain length of 8 to 26.
- nonionic hydrophilic polymers include, but are not limited to, nonionic vinyl polymers, nonionic polyamino acids, nonionic polyesters, nonionic polyethers, nonionic natural polymers, Examples include nonionic modified natural polymers, block polymers or graft copolymers having two or more of these polymers as constituent units.
- nonionic hydrophilic polymers nonionic polyethers, nonionic polyesters, nonionic polyamino acids, or nonionic synthetic polypeptides are preferred, and nonionic polyethers or nonionic synthetic polypeptides are more preferred.
- lipid having a nonionic hydrophilic polymer examples include, but are not particularly limited to, PEG-modified phosphoethanolamine, diacylglycerol PEG derivatives, monoacylglycerol PEG derivatives, dialkylglycerol PEG derivatives, cholesterol PEG derivatives, ceramide PEG derivatives, etc. It will be done. Among these, monoacylglycerol PEG or diacylglycerol PEG is preferred.
- the number of carbon atoms in the alkyl chain of the lipid having a nonionic hydrophilic polymer is preferably 8 to 26, more preferably 10 to 22.
- the weight average molecular weight of the nonionic hydrophilic polymer is preferably 100 to 10,000, more preferably 500 to 5,000, even more preferably 750 to 3,000.
- the nonionic hydrophilic polymer may be branched and may have a substituent such as a hydroxymethyl group.
- Preferred examples of lipids having nonionic hydrophilic polymers include DMG-PEG2000 (also referred to as DMG-PEG), stearic acid PEG, and stearyl ether PEG, which have the following structures. Particularly preferred specific examples of lipids having nonionic hydrophilic polymers are shown below.
- the blending amount of the lipid having a nonionic hydrophilic polymer is preferably 0.1 to 10 mol%, and 0.3 to 8 mol% based on the total lipid. It is more preferably 0.5 to 5 mol%, and particularly preferably 1 to 3 mol%.
- the lipid composition of the invention includes a nucleic acid.
- Nucleic acids include plasmids, single-stranded DNA, double-stranded DNA, siRNA (small interfering RNA), miRNA (micro RNA), mRNA, antisense oligonucleotides (also called ASO), ribozymes, aptamers, decoy nucleic acids, and genome editing. Examples include gRNA used, and any of them may be included. It may also contain modified nucleic acids.
- the weight ratio of lipid to nucleic acid is preferably 5 to 100, more preferably 5 to 70, even more preferably 5 to 40, and even more preferably 5 to 35. is particularly preferred.
- the method for producing the lipid composition of the present invention will be explained.
- the method for producing the lipid composition is not limited, but all or some of the constituent components of the lipid composition are dissolved in an organic solvent to form an oil phase, the water-soluble components are dissolved in water to form an aqueous phase, and the oil phase is dissolved. and an aqueous phase.
- a micro mixer may be used for mixing, or emulsification may be performed using an emulsifier such as a homogenizer, an ultrasonic emulsifier, a high-pressure jet emulsifier, or the like.
- a dry mixture containing lipids is prepared by subjecting a solution containing lipids to dryness under reduced pressure using an evaporator or the like or spray drying using a spray dryer, etc., and this mixture is added to an aqueous solvent. It can also be produced by emulsifying it with an emulsifying machine.
- An example of a method for producing a lipid composition is Step (a) of dissolving a lipid component in an organic solvent to obtain an oil phase; Step (b) of mixing the oil phase obtained in step (a) and the aqueous phase containing nucleic acid; Step (c) of diluting the liquid mixture containing the oil phase and aqueous phase obtained in step (b) to obtain a dispersion of the lipid composition containing the nucleic acid; Step (d) of removing the organic solvent from the dispersion of the lipid composition obtained in step (c); Examples include methods including:
- the lipid component is dissolved in an organic solvent (alcohol such as ethanol, ester, etc.).
- organic solvent such as ethanol, ester, etc.
- the total lipid concentration is not particularly limited, but is generally 1 mmol/L to 100 mmol/L, preferably 5 mmol/L to 50 mmol/L, and more preferably 10 mmol/L to 30 mmol/L.
- the aqueous phase can be obtained by dissolving a nucleic acid (eg, siRNA, antisense oligonucleotide, mRNA, etc.) in water or a buffer solution. Components such as antioxidants can be added as necessary.
- the mixing ratio (volume ratio) of the aqueous phase and oil phase is preferably 5:1 to 1:1, more preferably 4:1 to 2:1.
- the mixed solution can be diluted with water or a buffer solution (eg, phosphate buffered saline (PBS), etc.).
- a buffer solution eg, phosphate buffered saline (PBS), etc.
- step (c) the method for removing the organic solvent from the dispersion of the lipid composition is not particularly limited, and any general method can be used; for example, using phosphate buffered saline.
- the organic solvent can be removed by dialysis.
- the lipid composition can be sized if necessary.
- the sizing method is not particularly limited, but the particle size can be reduced using an extruder or the like.
- the lipid composition of the present invention may be a lipid particle.
- Lipid particles refer to particles composed of lipids, and include compositions having any structure selected from lipid aggregates (e.g., lipid nanoparticles), micelles, and liposomes.
- the structure of the lipid particles is not limited thereto as long as the composition contains lipids.
- the morphology of the lipid composition can be confirmed by electron microscopy or structural analysis using X-rays. For example, using a method using cryo-transmission electron microscopy (CryoTEM method), it is possible to determine whether a lipid particle has a lipid bilayer structure (lamellar structure) and an inner water layer, such as liposomes, or whether there is an electron density inside the particle. It can be confirmed whether the protein has a high core and a structure packed with constituents such as lipids. The presence or absence of a lipid bilayer structure (lamellar structure) in lipid particles can also be confirmed by small-angle X-ray scattering (SAXS) measurement.
- SAXS small-angle X-ray scattering
- the particle size of the particles is not particularly limited, but is preferably 10 to 1000 nm, more preferably 30 to 500 nm, and even more preferably 50 to 250 nm.
- the particle size of lipid particles can be measured by a common method (eg, dynamic light scattering method, laser diffraction method, etc.).
- nucleic acids eg, genes, etc.
- the lipid composition of the present invention can be used as a composition for introducing nucleic acids into cells.
- the lipid compositions of the invention can also be used as pharmaceutical compositions for in vivo nucleic acid delivery.
- the lipid composition of the present invention when the lipid composition of the present invention contains a nucleic acid having a medical use, the lipid composition can be administered to a living body as a nucleic acid medicine.
- the lipid composition of the present invention when used as a nucleic acid medicine, the lipid composition of the present invention may be used alone or in combination with a pharmaceutically acceptable carrier (for example, an administration medium such as physiological saline or a phosphate buffer). They can be mixed and administered to living organisms. That is, the lipid composition of the present invention may further include a pharmaceutically acceptable carrier.
- the concentration of the lipid composition in the mixture with the pharmaceutically acceptable carrier is not particularly limited, and can generally be from 0.05% by mass to 90% by mass. Further, other pharmaceutically acceptable additives, such as pH adjusting buffers, osmotic pressure adjusting agents, etc., may be added to the nucleic acid medicine containing the lipid composition of the present invention.
- the administration route for administering the lipid composition of the present invention is not particularly limited, and it can be administered by any method.
- Administration methods include oral administration, parenteral administration (intraarticular administration, intravenous administration, intraarterial administration, subcutaneous administration, intradermal administration, intravitreal administration, intraperitoneal administration, intramuscular administration, intravaginal administration, and intravesical administration) , intrathecal administration, pulmonary administration, rectal administration, colonic administration, buccal administration, nasal administration, intracisternal administration, inhalation, etc.).
- Parenteral administration is preferred, and intravenous, subcutaneous, intradermal or intramuscular injections are preferred.
- nucleic acid delivery is preferably performed by local administration in vivo.
- the lipid compositions of the present invention can also be administered by direct injection to the disease site.
- the dosage form of the lipid composition of the present invention is not particularly limited, but when oral administration is performed, the lipid composition of the present invention may be combined with an appropriate excipient to form tablets, troches, capsules, pills, etc. It can be used in the form of agents, suspensions, syrups, etc.
- Formulations suitable for parenteral administration also include antioxidants, buffers, bacteriostatic agents, and isotonic sterile injectables, suspending agents, solubilizing agents, thickening agents, stabilizers, or preservatives. Additives such as these can be included as appropriate.
- the lipid composition of the present invention is capable of retaining nucleic acids at a high encapsulation rate and is therefore very useful as a nucleic acid delivery carrier.
- the nucleic acid delivery carrier using the present invention it is possible to introduce nucleic acids into cells by, for example, mixing the obtained lipid composition with nucleic acids and performing transfection in vitro or in vivo. can.
- the nucleic acid delivery carrier using the present invention is also useful as a nucleic acid delivery carrier in nucleic acid medicines. That is, the lipid composition of the present invention is useful as a composition for in vitro or in vivo (preferably in vivo) nucleic acid delivery.
- purification by column chromatography is performed using an automatic purification device ISOLERA (Biotage), a medium pressure preparative purification device Purif-al-2 (Shoko Science Co., Ltd.), or a medium pressure liquid chromatograph YFLC W-prep 2XY. (Yamazen Co., Ltd.) was used.
- the carrier used in silica gel column chromatography was Chromatorex Q-Pack SI 50 (Fuji Silysia Chemical Co., Ltd.), High Flash Column W001, W002, W003, W004, or W005 (Yamazen Co., Ltd.).
- the NMR spectrum was measured using Bruker AVNEO400 (manufactured by Bruker) using tetramethylsilane as an internal standard, and the total ⁇ values were expressed in ppm.
- clogP was calculated using ChemDraw Professional Version: 19.1.0.8 (manufactured by PerkinElmer).
- 1,1'-carbonyldiimidazole (0.88 g) was added to a solution of beta-sitosterol (1.50 g) in tetrahydrofuran (7.5 mL), and the mixture was stirred at 30° C. for 4 hours.
- Water (7.5 mL), hexane (7.5 mL) and ethyl acetate (7.5 mL) were added to the reaction mixture, and the organic layer was separated, followed by water (7.5 mL) and a saturated aqueous sodium chloride solution (3 mL).
- PTEN Phosphatase and Tensin Homolog Deleted from Chromosome 10.
- PTEN ASO Antisense oligonucleotide nucleic acid for PTEN protein
- a represents 2'-deoxyadenosine
- g represents 2'-deoxyguanosine
- t represents thymidine
- c represents 2'-deoxy-5-methylcytidine.
- (m) represents 2'-O-methoxyethyl (2'-MOE) modification
- A(m) is 2'-MOE-adenosine
- G(m) is 2'-MOE-guanosine
- T(m) is 2'-MOE-thymidine
- C(m) represents 2'-MOE-5-methylcytidine.
- ⁇ represents phosphorothioate.
- DMG-PEG2000 (1,2-dimyristoyl-rac-glycero-3-methoxypolyethylene glycol) (Product name: SUNBRIGHT (registered trademark) GM-020; NOF corporation)
- SUNBRIGHT registered trademark
- DMPE-PEG2000 N-(Methylpolyoxyethylene oxycarbonyl)-1,2-dimyristoyl-sn-glycero-3-phosphoethanolamine, sodium salt) (Product name: SUNBRIGHT (registered trademark) PM-020CN; NOF corporation)
- SUNBRIGHT registered trademark
- PM-020CN NoF corporation
- Compound A is 2-pentylheptyl 6-(2-(decanoyloxy)ethyl)-3-ethyl-12-hexyl-10-oxo-9,11-dioxa-3,6-diazahexadecane-16-oate (See Example 135 of WO2021/095876).
- Compound B is 2-butyloctyl 3-ethyl-12-hexyl-6-(2-(octanoyloxy)ethyl)-10-oxo-9,11-dioxa-3,6-diazahenicosan-21-oate (WO2019 (See Example 88 of Publication No./235635).
- PTEN ASO 5 mg was dissolved in 1 mL of sterile water and diluted with a 10 mmol/L acetate buffer of pH 4 to a nucleic acid concentration of 54.6 ⁇ mol/L to obtain an aqueous phase.
- the water phase and the oil phase are mixed in a micromixer (see Japanese Patent No. 5288254) using a syringe pump so that the volume ratio of water phase and oil phase is 3:1, and the mixed liquid is buffered with phosphate buffer.
- a dispersion of nucleic acid and lipid particles was obtained by diluting the mixture 2 times with physiological saline (PBS).
- the first lipid (lipid represented by formula (2) or its salt), phospholipid (neutral lipid), sterol (compound represented by formula (1)), and PEG lipid (non-formula (1)) that occupy the lipid composition
- Table 3 lists the molar ratios of lipids containing ionic hydrophilic polymers. The mass ratio of nucleic acid to total lipids at the time of mixing is also listed in Table 3.
- the particle size and polydispersity index of the lipid particles were determined by diluting the lipid particle dispersion 5 times with phosphate buffered saline (PBS) using a zeta potential/particle size measurement system ELS-Z2 (Otsuka Electronics). It was measured. The measurement results are shown in Table 4.
- Total nucleic acid concentration determination 30 ⁇ L of a 3 mol/L aqueous sodium acetate solution and 9 ⁇ L of glycogen were added to 60 ⁇ L of lipid particles holding nucleic acids, and then 1.5 mL of ethanol was added to dissolve the lipids and precipitate only the nucleic acids. Thereafter, centrifugation was performed and the supernatant was removed. After air drying for 15 minutes or more, water was added to redissolve the solution, and the total nucleic acid concentration was determined by measuring the concentration using Nanodrop ND1000 (Thermo Fisher Scientific).
- Quantification of nucleic acid concentration in external aqueous phase Quantification was performed using Quant-iT RiboGreen RNA Assay Kit (Thermo Fisher Scientific) according to the protocol.
- the 20x TE buffer included in the above kit was diluted with water to make 1x TE buffer.
- TE represents Tris/EDTA (ethylenediaminetetraacetic acid).
- the lipid particle dispersion containing nucleic acids was diluted 50 times with 1 ⁇ TE buffer.
- lipid particle dispersion diluted 10,000 times into a 96-well plate, then add 100 ⁇ L of RiboGreen reagent (the reagent included in the Quanti-iT Ribogreen RNA Assay Kit mentioned above) diluted 2000 times with 1x TE buffer. was added to the sample, and the nucleic acid concentration in the external aqueous phase was quantified by measuring fluorescence (excitation wavelength: 485 nm, fluorescence wavelength: 535 nm) using a plate reader Infinite F200 (TECAN).
- RiboGreen reagent the reagent included in the Quanti-iT Ribogreen RNA Assay Kit mentioned above
- nucleic acid inclusion rate (total nucleic acid concentration - nucleic acid concentration in external aqueous phase) ⁇ total nucleic acid concentration x 100 The calculation results are shown in Table 4.
- PTEN protein mRNA measurement followed the protocol of TaqMan® Fast Advanced Cells-to-CT TM Kit (Thermo fisher scientific).
- a dispersion of nucleic acid/lipid particles, naked ASO, or PBS prepared at a final concentration of 500 nmol/L as an ASO concentration was added to SH-SY5Y cells. After exposure for 24 hours at 37°C under 5% CO2 control, the culture supernatant was removed and washed once with PBS at 4°C. After removing PBS, Lysis solution was added at 50 ⁇ L/well and allowed to stand at room temperature for 5 minutes to obtain a cell lysate.
- TaqMan Fast Advanced Cells-to-CT TM Kit (Thermo fisher scientific) for cell lysate, Hs02621230_s1, FAM/MGB (Thermo fisher sc ientific), and Human GAPDH Endogenous Control, VIC (registered trademark) Reverse transcription and PCR reactions were performed using /MGB (Thermo fisher scientific).
- the PTEN mRNA value of each sample was calculated using the ⁇ Ct method. Specifically, the Ct value of GAPDH is subtracted from the Ct value of PTEN to calculate the ⁇ Ct value of each sample. The ddCt value was calculated by subtracting the average value of the ⁇ Ct values of the PBS treatment group from the calculated ⁇ Ct value. PTEN mRNA expression ratio was calculated from each ⁇ Ct value. The results are shown in Table 5.
- DSPC 1,2-Distearoyl-sn-glycero-3-phosphocholine Product Name: COATSOME(R) MC-8080; NOF Corporation
- DMG-PEG2000 1,2-dimyristoyl-rac-glycero-3-methoxypolyethylene glycol-2000 product
- FLuc mRNA (product name: CleanCap FLuc mRNA; manufactured by TriLink) was mixed with a 50 mmol/L citric acid buffer at pH 4 so that the weight ratio of the total lipid concentration to the mRNA concentration after mixing the oil phase and the water phase was 20:1. An aqueous phase was obtained. Next, the water phase and the oil phase were mixed using NanoAssemblr (Precision NanoSystems) so that the volume ratio was 3:1, and the mixture was diluted with phosphate buffered saline (PBS) for 2 hours. The mixture was diluted twice to obtain a dispersion of mRNA lipid particles.
- PBS phosphate buffered saline
- Ethanol was removed by dialyzing this dispersion against 20mM Tris buffer pH 7.4 containing 8% sucrose using a dialysis cassette (Slide-A-Lyzer G2, MWCO: 10kD, Thermo Fisher Scientific). FLuc mRNA encapsulating lipid particles were obtained.
- FLuc mRNA was diluted with MilliQ water to prepare a 2-fold diluted sample from 100 ⁇ g/mL to 3.1 ⁇ g/mL, and a calibration curve solution was prepared.
- a measurement solution was prepared by mixing 50 ⁇ L of the calibration curve solution or mRNA lipid nanoparticles with 450 ⁇ L of methanol.
- the absorbance of each measurement solution at 260 nm and 330 nm was measured using a UV plate reader (Multiskan Go, Thermo Fisher Scientific), and the absorbance at 330 nm was subtracted from the absorbance at 260 nm to obtain the absorbance of each measurement solution.
- the total aqueous phase mRNA concentration was calculated from the calibration curve using the absorbance of each sample measurement solution.
- the nucleic acid concentration in the external aqueous phase was quantified by the standard addition method using Quant-iT RiboGreen RNA Assay Kit (Thermo Fisher Scientific).
- the 20x TE buffer included in the above kit was diluted with water to make 1x TE buffer.
- TE represents Tris/EDTA (ethylenediaminetetraacetic acid).
- FLuc mRNA was diluted with TE buffer to a final concentration of 0 to 400 ng/mL to prepare a nucleic acid dilution series.
- mRNA inclusion rate (total mRNA concentration - mRNA concentration in external aqueous phase) ⁇ total mRNA concentration x 100 The results are shown in Table 6.
- the Luciferase expression level was measured according to the protocol of ONE-Glo Luciferase Assay System (Promega). A dispersion of nucleic acid and lipid particles that had been preincubated with hApoE (Fuji Film Wako Pure Chemical Industries, Ltd.) and prepared to have a final mRNA concentration of 80 ng/well was added to HeLa cells. After exposure for 24 hours at 37° C. under 5% CO 2 control, a mixture of Luciferase Assay Buffer and Luciferase Assay Substrate was added at 100 ⁇ L/well and allowed to stand at room temperature for 3 minutes to obtain a measurement solution. 50 ⁇ L of each measurement solution was transferred to another plate, and the amount of luminescence was measured using a plate reader (Envision, Perkin Elmer). The results are shown in Table 7.
- nucleic acid lipid composition of the present invention exhibited good expression of Luciferase, and was found to have excellent mRNA delivery ability.
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Abstract
Description
R101は、
R102は、
(i)水素原子、
(ii)OH、SH、COOH、NR106R107 、N(R108)C(O)R109、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基、
(iii)C(O)R103、又は
(iv)C(O)NR104R105を示し、
R103は、OH、SH、COOH、NR110R111 、N(R112)C(O)R113、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R104およびR105はそれぞれ独立に、水素原子、またはOH、SH、COOH、NR110R111 、N(R112)C(O)R113、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R106、R107、R108およびR109はそれぞれ独立に、水素原子、またはOH、SH、COOH、NR110R111 、N(R112)C(O)R113、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R110、R111、R112およびR113はそれぞれ独立に、水素原子、またはOHまたはSHから選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示す。
式(2)中、Xは-NR1-または-O-を示し、
R1は、水素原子、炭素数6~24の炭化水素基、またはR21-L1-R22-で示される基を示し、R21は炭素数1~24の炭化水素基を示し、L1は、-O(CO)O-、-O(CO)-、-(CO)O-、-O-、または
R2およびR3はそれぞれ独立に、水素原子、炭素数3~24の炭化水素基、またはR31-L2-R32-で示される基を示し、R31は炭素数1~24の炭化水素基を示し、L2は、-O(CO)O-、-O(CO)-、-(CO)O-、-O-、または
R4、R5、R6、R7、R8、R9、R10、R11、およびR12はそれぞれ独立に、水素原子または置換されてもよい炭素数1~18のアルキル基を示し、
R4およびR5、R10およびR5、R5およびR12、R4およびR6、R5およびR6、R6およびR7、R6およびR10、R12およびR7、並びにR7およびR8の何れか一組以上は互いに連結してO原子を含んでいてもよい4~7員環を形成してもよく、
置換されてもよい炭素数1~18のアルキル基上の置換基は、ヒドロキシル基、カルボキシル基、-NR45R46で示されるアミノ基、置換もしくは無置換のアリール基、置換もしくは無置換のヘテロアリール基、-O(CO)O-R41、-O(CO)-R42、-(CO)O-R43、または-O-R44で示される基であり、R41、R42、R43、R44、R45およびR46はそれぞれ独立に、炭素数1~18の炭化水素基を示し、
置換もしくは無置換のアリール基、および置換もしくは無置換のヘテロアリール基上の置換基は、炭素数1~18のアルキル基、ヒドロキシル基、カルボキシル基、-NR45R46で示されるアミノ基、-O(CO)O-R41、-O(CO)-R42、-(CO)O-R43、または-O-R44で示される基であり、R41、R42、R43、R44、R45およびR46はそれぞれ独立に、炭素数1~18の炭化水素基を示し、
a、b、c、およびdはそれぞれ独立に0~3の整数を示し、但し、a+bは1以上であり、c+dは1以上である。
<2> 式(1)中、R102が、
(i)水素原子、又は
(iv)C(O)NR104R105を示し、R104およびR105はそれぞれ独立に、水素原子、またはOH、NR110R111 、またはN(R112)C(O)R113から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R110、R111、R112およびR113はそれぞれ独立に、水素原子、または1以上のOHで置換されていてもよい炭素数1~4の炭化水素基を示す、
<1>に記載の脂質組成物。
<3> 式(1)中のR101が、
R102が、C(O)NR104R105を示し、
R104およびR105はそれぞれ独立に、水素原子、またはOH、NR110R111 、またはN(R112)C(O)R113から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R110、R111、R112およびR113はそれぞれ独立に、水素原子、または1以上のOHで置換されていてもよい炭素数1~4の炭化水素基を示す、
<1>に記載の脂質組成物。
<4> 式(1)中のR101が、
<5> 式(1)で表される化合物が、下記(A)~(M)の何れかで表される化合物である、<1>から<4>の何れか一に記載の脂質組成物。
<7> 式(2)で表される脂質またはその塩の含有率が、全脂質に対して30モル%~70モル%である、<1>から<6>の何れか一に記載の脂質組成物。
<8> 上記中性脂質が双性イオン性脂質である、<1>から<7>の何れか一に記載の脂質組成物。
<9> 上記中性脂質がリン脂質である、<1>から<8>のいずれか一に記載の脂質組成物。
<10> 上記中性脂質の含有率が、全脂質に対して1モル%~30モル%である、<1>から<9>のいずれか一に記載の脂質組成物。
<11> 上記の非イオン性親水性高分子を有する脂質が、アシル基を含み、アシル基の炭素鎖長が8~26である、<1>から<10>のいずれか一に記載の脂質組成物。
<12> 上記の非イオン性親水性高分子を有する脂質の含有率が、全脂質に対して0.1モル%~10モル%である、<1>から<11>のいずれか一に記載の脂質組成物。
<13> 核酸に対する脂質の重量比が5~100である、<1>から<12>のいずれか一に記載の脂質組成物。
<14> 細胞に核酸を導入するための組成物である、<1>から<13>のいずれか一に記載の脂質組成物。
<15> in vivoでの核酸送達のための組成物である、<1>から<13>のいずれか一に記載の脂質組成物。
<16> 脂質粒子である、<1>から<15>の何れか一に記載の脂質組成物。
本明細書において「~」は、その前後に記載される数値をそれぞれ最小値および最大値として含む範囲を示す。
本発明においては、下記式(1)で示される化合物を使用する。
R101は、
R102は、
(i)水素原子、
(ii)OH、SH、COOH、NR106R107 、N(R108)C(O)R109、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基、
(iii)C(O)R103、又は
(iv)C(O)NR104R105を示し、
R103は、OH、SH、COOH、NR110R111 、N(R112)C(O)R113、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R104およびR105はそれぞれ独立に、水素原子、またはOH、SH、COOH、NR110R111 、N(R112)C(O)R113、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R106、R107、R108およびR109はそれぞれ独立に、水素原子、またはOH、SH、COOH、NR110R111 、N(R112)C(O)R113、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R110、R111、R112およびR113はそれぞれ独立に、水素原子、またはOHまたはSHから選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示す。
(i)水素原子、又は
(iv)C(O)NR104R105を示し、R104およびR105はそれぞれ独立に、水素原子、またはOH、NR110R111 、またはN(R112)C(O)R113から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R110、R111、R112およびR113はそれぞれ独立に、水素原子、または1以上のOHで置換されていてもよい炭素数1~4の炭化水素基を示す。
R102が、C(O)NR104R105を示し、
R104およびR105はそれぞれ独立に、水素原子、またはOH、NR110R111 、またはN(R112)C(O)R113から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R110、R111、R112およびR113はそれぞれ独立に、水素原子、または1以上のOHで置換されていてもよい炭素数1~4の炭化水素基を示す。
化合物(A):CAS 331245-55-7
化合物(B):CAS 331245-51-3
化合物(C):CAS 331245-57-9
化合物(D):CAS 331245-56-8
化合物(E):CAS 104082-35-1
化合物(F):CAS 92588-73-3
化合物(G):CAS 136099-14-4
上記の中でも、化合物(B)、(C)、(D)及び(G)がさらに好ましく、化合物(D)及び(G)が特に好ましい。
式(1)で表される化合物は、後記する実施例における化合物の合成に記載した方法に準じて合成することができる。
本発明においては、下記式(2)で示される脂質またはその塩を使用する。
Xは-NR1-または-O-を示し、
R1は、水素原子、炭素数6~24の炭化水素基、またはR21-L1-R22-で示される基を示し、R21は炭素数1~24の炭化水素基を示し、L1は、-O(CO)O-、-O(CO)-、-(CO)O-、-O-、または
R2およびR3はそれぞれ独立に、水素原子、炭素数3~24の炭化水素基、またはR31-L2-R32-で示される基を示し、R31は炭素数1~24の炭化水素基を示し、L2は、-O(CO)O-、-O(CO)-、-(CO)O-、-O-、または
R4、R5、R6、R7、R8、R9、R10、R11、およびR12はそれぞれ独立に、水素原子または置換されてもよい炭素数1~18のアルキル基を示し、
R4およびR5、R10およびR5、R5およびR12、R4およびR6、R5およびR6、R6およびR7、R6およびR10、R12およびR7、並びにR7およびR8の何れか一組以上は互いに連結してO原子を含んでいてもよい4~7員環を形成してもよく、
置換されてもよい炭素数1~18のアルキル基上の置換基は、ヒドロキシル基、カルボキシル基、-NR45R46で示されるアミノ基、置換もしくは無置換のアリール基、置換もしくは無置換のヘテロアリール基、-O(CO)O-R41、-O(CO)-R42、-(CO)O-R43、または-O-R44で示される基であり、R41、R42、R43、R44、R45およびR46はそれぞれ独立に、炭素数1~18の炭化水素基を示し、
置換もしくは無置換のアリール基、および置換もしくは無置換のヘテロアリール基上の置換基は、炭素数1~18のアルキル基、ヒドロキシル基、カルボキシル基、-NR45R46で示されるアミノ基、-O(CO)O-R41、-O(CO)-R42、-(CO)O-R43、または-O-R44で示される基であり、R41、R42、R43、R44、R45およびR46はそれぞれ独立に、炭素数1~18の炭化水素基を示し、
a、b、c、およびdはそれぞれ独立に0~3の整数を示し、但し、a+bは1以上であり、c+dは1以上である。
L2の好ましい範囲としては、-O(CO)O-、-O(CO)-、または-(CO)O-が好ましく、-O(CO)-または-(CO)O-がより好ましい。
R2およびR3はそれぞれ独立に、1つ以上の不飽和結合を含む炭素数3~24の炭化水素基であるか、
R2およびR3はそれぞれ独立にR31-L2-R32-で示される基であるか、または、
R2およびR3の一方がR31-L2-R32-で示される基であり、他方が炭素数3~24の炭化水素基であり、
R31は、炭素数1~24の炭化水素基を示し、
L2は、-O(CO)O-、-O(CO)-、-(CO)O-、-O-、または
R32は、2価の連結基であって炭素数1~18の炭化水素連結基を示し、
R5は、-O(CO)-R42または-(CO)O-R43により置換されてもよい炭素数1~18のアルキル基を示し、R42、およびR43はそれぞれ独立に、炭素数1~18の炭化水素基を示し、
R7およびR8は、それぞれ独立に、炭素数1~4のアルキル基を示し、
eは2または3を示す。
塩基性基における塩としては、たとえば、塩酸、臭化水素酸、硝酸および硫酸などの鉱酸との塩;ギ酸、酢酸、クエン酸、シュウ酸、フマル酸、マレイン酸、コハク酸、リンゴ酸、酒石酸、アスパラギン酸、トリクロロ酢酸およびトリフルオロ酢酸などの有機カルボン酸との塩;ならびにメタンスルホン酸、ベンゼンスルホン酸、p-トルエンスルホン酸、メシチレンスルホン酸およびナフタレンスルホン酸などのスルホン酸との塩が挙げられる。
酸性基における塩としては、たとえば、ナトリウムおよびカリウムなどのアルカリ金属との塩;カルシウムおよびマグネシウムなどのアルカリ土類金属との塩;アンモニウム塩;ならびにトリメチルアミン、トリエチルアミン、トリブチルアミン、ピリジン、N,N-ジメチルアニリン、N-メチルピペリジン、N-メチルモルホリン、ジエチルアミン、ジシクロヘキシルアミン、プロカイン、ジベンジルアミン、N-ベンジル-β-フェネチルアミン、1-エフェナミンおよびN,N’-ジベンジルエチレンジアミンなどの含窒素有機塩基との塩などが挙げられる。
上記した塩の中で、好ましい塩としては、薬理学的に許容される塩が挙げられる。
式(2)で表される脂質及びその製造方法は、WO2019/235635号公報およびWO2021/095876号公報に記載されている。
本発明の脂質組成物は、中性脂質を含む。
中性脂質としては、双性イオン性脂質であることが好ましい。
双性イオン性脂質としては、リン脂質が好ましく、具体的には、ホスファチジルコリン、ホスファチジルエタノールアミン、またはスフィンゴミエリンなどが挙げられる。リン脂質としては、ホスファチジルコリンなどのコリン基を有するリン脂質が好ましい。双性イオン性脂質としては、単独でも、複数の異なる中性脂質を組み合わせても良い。
本発明の脂質組成物は、非イオン性親水性高分子を有する脂質を含む。
非イオン性親水性高分子を有する脂質は、好ましくはアシル基を含み、アシル基の炭素鎖長が8~26であることが好ましい。
これらの非イオン性親水性高分子のうち、好ましくは非イオン性ポリエーテル、非イオン性ポリエステル、非イオン性ポリアミノ酸もしくは非イオン性合成ポリペプチドであり、さらに好ましくは非イオン性ポリエーテルまたは非イオン性ポリエステル、よりさらに好ましくは非イオン性ポリエーテルまたは非イオン性モノアルコキシポリエーテルであり、特に好ましくはポリエチレングリコール(ポリエチレングリコールは、以下においてPEGとも称する)である。
非イオン性親水性高分子の重量平均分子量は、100~10000が好ましく、500~5000がより好ましく、750~3000がさらに好ましい。
非イオン性親水性高分子は分岐していてもよく、ヒドロキシメチル基のような置換基を有していてもよい。
非イオン性親水性高分子を有する脂質の好ましい一例としては、以下の構造を有するDMG-PEG2000(DMG-PEGとも表記する)、ステアリン酸PEG、ステアリルエーテルPEGなどが挙げられる。
非イオン性親水性高分子を有する脂質の特に好ましい具体例を以下に示す。
本発明の脂質組成物は、核酸を含む。核酸としてはプラスミド、1本鎖DNA、2本鎖DNA、siRNA(small interfering RNA)、miRNA(micro RNA)、mRNA、アンチセンスオリゴヌクレオチド(ASOとも言う)、リボザイム、アプタマー、デコイ核酸、ゲノム編集で用いるgRNA等が挙げられ、いずれを含んでもよい。また、修飾化された核酸を含んでもよい。
本発明の脂質組成物において、核酸に対する脂質の重量比は5~100であることが好ましく、5~70であることがより好ましく、5~40であることがさらに好ましく、5~35であることが特に好ましい。
本発明の脂質組成物の製造方法について説明する。
脂質組成物の製造方法は限定されないが、脂質組成物の構成成分全てまたは一部の油溶性成分を有機溶媒等に溶解させ油相とし、水溶性成分を水に溶解させ水相とし、油相と水相を混合して製造することができる。混合にはマイクロミキサーを使用してもよく、ホモジナイザー等の乳化機、超音波乳化機、高圧噴射乳化機等により乳化してもよい。
脂質成分を有機溶媒に溶解して油相を得る工程(a);
工程(a)で得た油相と、核酸を含む水相と、を混合する工程(b);
工程(b)で得た油相および水相を含む混合液を希釈して、核酸を含む脂質組成物の分散液を得る工程(c);
工程(c)で得られた脂質組成物の分散液から上記有機溶媒を除去する工程(d);
を含む方法が挙げられる。
本発明の脂質組成物は、脂質粒子であってもよい。脂質粒子とは、脂質から構成される粒子を意味し、脂質が凝集している脂質凝集体(例えば、脂質ナノ粒子など)、ミセル、リポソームから選択されるいずれかの構造を有する組成物が含まれるが、脂質を含む組成物である限り脂質粒子の構造はこれらに限定されない。
本発明における脂質組成物の利用の一例としては、核酸を含む脂質組成物を細胞に導入することによって、細胞に核酸(例えば、遺伝子など)を導入することができる。即ち、本発明の脂質組成物は、細胞に核酸を導入するための組成物として使用することができる。
また、本発明の脂質組成物は、in vivoにおける核酸送達のための薬学的組成物として使用することができる。
本発明の脂質組成物は、高い内包率で核酸を保持することが可能であるため、核酸送達キャリアとして非常に有用である。本発明を利用した核酸送達キャリアによれば、例えば、得られた脂質組成物を核酸などと混合して、in vitroまたはin vivoでトランスフェクションをすることにより、細胞に核酸などを導入することができる。また、本発明を利用した核酸送達キャリアは、核酸医薬における核酸送達キャリアとしても有用である。すなわち、本発明の脂質組成物は、in vitroまたはin vivo(好ましくはin vivo)での核酸送達のための組成物として有用である。
clogPは、ChemDraw Professional Version: 19.1.0.8(PerkinElmer社製)を用いて計算した。
clogP: 10.725
合成例1と同様の手法により、化合物2、化合物4、化合物5および化合物8~14を得た。
clogP: 10.4878
合成例3と同様の手法により、化合物6、化合物7および化合物17を得た。
化合物15の合成
clogP: 9.447
化合物16:
clogP: 10.505
PTEN(Phosphatase and Tensin Homolog Deleted from Chromosome 10)は、イノシトールリン脂質であるホスファチジルイノシトール3,4,5-三リン酸の脱リン酸化反応を触媒する酵素である。
PTENタンパク質に対するアンチセンスオリゴヌクレオチド核酸(PTEN ASO)をジーンデザイン株式会社及び北海道システムサイエンス株式会社より購入した。20塩基からなるオリゴヌクレオチドのホスホジエステル結合であり、配列を以下に記載する。
5’-C(m)^T(m)^G(m)^C(m)^T(m)^a^g^c^c^t^c^t^g^g^a^T(m)^T(m)^T(m)^G(m)^A(m)-3’
表3に示す第一の脂質(イオン化脂質)、ステロール、リン脂質、及びポリエチレングリコール脂質(PEG脂質)を表3に記載のモル比で、総脂質濃度が20mmol/Lとなるようにエタノールに溶解させ、油相を得た。
DSPC(1,2-ジステアロイル-sn-グリセロ-3-ホスフォコリン(1,2-Distearoyl-sn-glycero-3-phosphocholine),製品名:COATSOME MC-8080;NOF corporation);
コレステロール(製品名:Cholesterol HP;日本精化株式会社);
DMG-PEG2000(1,2-dimyristoyl-rac-glycero-3-methoxypolyethyleneglycol)(製品名:SUNBRIGHT(登録商標)GM-020;NOF corporation)
DMG-PEG2000(DMG-PEGとも表記する)の構造を以下に示す。
DMPE-PEG2000の構造を以下に示す。
脂質粒子の粒子径及び多分散指数は、脂質粒子分散液について、ゼータ電位・粒径測定システムELS-Z2(大塚電子)を用いて、リン酸緩衝生理食塩水(PBS)で5倍希釈し、測定した。測定結果を表4に示す。
(総核酸濃度定量)
核酸を保持する脂質粒子60μLに,3mol/L酢酸ナトリウム水溶液30μLとグリコーゲン9μLを添加し、つづいてエタノール1.5mLを添加することで脂質を溶解し、核酸のみを沈殿させた。その後、遠心分離を行い、上清を除去した。15分以上風乾させた後、水を加えて再溶解させ,ナノドロップND1000(Thermo Fisher Scientific)を用いて濃度測定することで、総核酸濃度を定量した。
Quant-iT RiboGreen RNA Assay Kit(Thermo Fisher Scientific)を用い、プロトコルに従って定量した。まず、上述のキットに含まれる20×TEバッファーを水で希釈し、1×TEバッファーとした。なお、TEは、Tris/EDTA(エチレンジアミン四酢酸)を示す。外水相の核酸のみを定量するため、核酸を保持する脂質粒子分散液を1×TEバッファーで50倍に希釈した。
上述の工程で得られた総核酸濃度および外水相での核酸濃度の定量結果を用いて、下記式に従って、核酸脂質粒子の核酸内包率を算出した。
核酸内包率(%)=(総核酸濃度-外水相における核酸濃度)÷総核酸濃度×100
算出の結果を表4に示す。
(評価に用いた細胞)
SH-SY5Y細胞(American Type Culture Collection)を用いたin vitro試験では,E-MEM(gibco)、Ham’s F12(gibco)、FBS(gibco)、Penicillin-streptomycin(gibco)、NEAA(富士フイルム和光純薬)をそれぞれ41.5:41.5:15:1:1の割合で混合したものを培養培地として用いた。
PTENタンパク質 mRNA測定はTaqMan(登録商標)Fast Advanced Cells-to-CTTMKit(Thermo fisher scientific)のプロトコルに従った。SH-SY5Y細胞に対し、最終濃度がASO濃度として500nmol/Lとなるように調製した核酸脂質粒子の分散液、Naked ASOもしくはPBSを添加した。37℃、5%CO2管理下で24時間暴露後、培養上清を除去し、4℃のPBSで1回洗浄した。PBSを除去後、Lysis solutionを50μL/wellで添加し、室温で5分静置することで細胞ライセートを得た。細胞ライセートについてTaqMan(登録商標)Fast Advanced Cells-to-CTTMKit(Thermo fisher scientific)、PCR反応試薬として、Hs02621230_s1,FAM/MGB(Thermo fisher scientific)、およびHuman GAPDH Endogenous Control、VIC(登録商標)/MGB(Thermo fisher scientific)を使用して逆転写及びPCR反応を実施した。
化合物Aもしくは化合物B、DSPC(1,2-ジステアロイル-sn-グリセロ-3-ホスフォコリン(1,2-Distearoyl-sn-glycero-3-phosphocholine 製品名:COATSOME(R)MC-8080;NOF corporation社製)、表6に記載の化合物、DMG-PEG2000(1,2-ジミリストイル-rac-グリセロ-3-メトキシポリエチレングリコール-2000 製品名:SUNBRIGHT(R)GM-020;NOF corporation社製)を、50:10:38.5:1.5のモル比で、総脂質濃度が12.5mmol/Lとなるようにエタノールに溶解させ、油相を得た。
mRNA内包脂質粒子の粒子径は、ゼータ電位・粒径測定システムNanoSAQLA(大塚電子)を用いて、脂質粒子をリン酸緩衝生理食塩水(PBS)で5倍希釈してから、測定した。結果を表6に示す。
(総mRNA濃度定量)
FLuc mRNAをMilliQ水で希釈して100μg/mLから3.1μg/mLまでの2倍希釈系列サンプルを調製し,検量線溶液を調製した。検量線溶液もしくはmRNA脂質ナノ粒子50 μLをメタノール450 μLと混合して測定溶液を調製した。
UVプレートリーダー(Multiskan Go, Thermo fisher scientific)を用いて各測定溶液の260nmおよび330nmにおける吸光度を測定し,260nmの吸光度から330nmの吸光度を差し引き,各測定溶液の吸光度とした。各サンプル測定溶液の吸光度を用いて,検量線から全水相mRNA濃度を算出した。
Quant-iT RiboGreen RNA Assay Kit(Thermo Fisher Scientific)を用い、標準添加法により外水相核酸濃度を定量した。まず、上述のキットに含まれる20×TEバッファーを水で希釈し、1×TEバッファーとした。なお、TEは、Tris/EDTA(エチレンジアミン四酢酸)を示す。FLuc mRNAを終濃度が0~400 ng/mLになるようにTEバッファーで希釈し,核酸希釈系列を調製した。TEバッファーで5倍希釈したmRNA脂質ナノ粒子を10μLと核酸希釈系列90μLを96ウェルプレートで混合後、TEバッファーで200倍に希釈したRiboGreen試薬100μLを各ウェルに加え,蛍光プレートリーダー(Infitite 200 Pro M nano +、TECAN)を用いて蛍光 (励起波長:485 nm,蛍光波長:535 nm) を測定した。得られた結果から標準添加法に則り,各測定溶液の外水相mRNA濃度を算出した。
上述の工程で得られた総mRNA濃度および外水相におけるmRNA濃度の定量結果を用いて、下記式に従って、mRNA脂質ナノ粒子のmRNA内包率を算出した。結果を表1に示す。
mRNA内包率(%)=(総mRNA濃度-外水相におけるmRNA濃度)÷総mRNA濃度×100
結果を表6に示す。
in vitroでのLuciferase発現測定を行った。
(評価に用いた細胞)
Hela細胞を用いたin vitro試験では、E-MEM(gibco)、FBS(fetal bovine serum)(gibco)、Penicillin-streptomycin(gibco)、NEAA(Non-Essential Amino Acid)(富士フイルム和光純薬)をそれぞれ88:10:1:1の割合で混合したものを培養培地として用いた。
Luciferase発現量の測定はONE-Glo Luciferase Assay System(Promega)のプロトコルに従った。Hela細胞に対し、事前にhApoE(富士フイルム和光純薬)とプレインキュベーションした、最終濃度がmRNA濃度として80ng/wellとなるように調製した核酸脂質粒子の分散液を添加した。37℃、5%CO2管理下で24時間暴露後、Luciferase Assay BufferとLuciferase Assay Substrateを混合したものを100μL/wellで添加し、室温で3分静置することで測定溶液を得た。測定溶液を50μLずつ別プレートに移液し、プレートリーダー(Envision、Perkin elmer)で発光量を測定した。結果を表7に示す。
Claims (16)
- 下記式(1)で表される化合物、下記式(2)で表される脂質またはその塩、中性脂質、非イオン性親水性高分子を有する脂質、および核酸を含む、脂質組成物。
式(1)中、
R101は、
、または
を示し、*は結合位置を示し、R201は、炭素数7~18の鎖状炭化水素基を示し、
は、単結合、又は二重結合を示し、
R102は、
(i)水素原子、
(ii)OH、SH、COOH、NR106R107 、N(R108)C(O)R109、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基、
(iii)C(O)R103、又は
(iv)C(O)NR104R105を示し、
R103は、OH、SH、COOH、NR110R111 、N(R112)C(O)R113、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R104およびR105はそれぞれ独立に、水素原子、またはOH、SH、COOH、NR110R111 、N(R112)C(O)R113、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R106、R107、R108およびR109はそれぞれ独立に、水素原子、またはOH、SH、COOH、NR110R111 、N(R112)C(O)R113、又はCF3から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R110、R111、R112およびR113はそれぞれ独立に、水素原子、またはOHまたはSHから選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示す。
式(2)中、Xは-NR1-または-O-を示し、
R1は、水素原子、炭素数6~24の炭化水素基、またはR21-L1-R22-で示される基を示し、R21は炭素数1~24の炭化水素基を示し、L1は、-O(CO)O-、-O(CO)-、-(CO)O-、-O-、または
を示し、R22は2価の連結基であって炭素数1~18の炭化水素連結基を示し、
R2およびR3はそれぞれ独立に、水素原子、炭素数3~24の炭化水素基、またはR31-L2-R32-で示される基を示し、R31は炭素数1~24の炭化水素基を示し、L2は、-O(CO)O-、-O(CO)-、-(CO)O-、-O-、または
を示し、R32は2価の連結基であって炭素数1~18の炭化水素連結基を示し、
R4、R5、R6、R7、R8、R9、R10、R11、およびR12はそれぞれ独立に、水素原子または置換されてもよい炭素数1~18のアルキル基を示し、
R4およびR5、R10およびR5、R5およびR12、R4およびR6、R5およびR6、R6およびR7、R6およびR10、R12およびR7、並びにR7およびR8の何れか一組以上は互いに連結してO原子を含んでいてもよい4~7員環を形成してもよく、
置換されてもよい炭素数1~18のアルキル基上の置換基は、ヒドロキシル基、カルボキシル基、-NR45R46で示されるアミノ基、置換もしくは無置換のアリール基、置換もしくは無置換のヘテロアリール基、-O(CO)O-R41、-O(CO)-R42、-(CO)O-R43、または-O-R44で示される基であり、R41、R42、R43、R44、R45およびR46はそれぞれ独立に、炭素数1~18の炭化水素基を示し、
置換もしくは無置換のアリール基、および置換もしくは無置換のヘテロアリール基上の置換基は、炭素数1~18のアルキル基、ヒドロキシル基、カルボキシル基、-NR45R46で示されるアミノ基、-O(CO)O-R41、-O(CO)-R42、-(CO)O-R43、または-O-R44で示される基であり、R41、R42、R43、R44、R45およびR46はそれぞれ独立に、炭素数1~18の炭化水素基を示し、
a、b、c、およびdはそれぞれ独立に0~3の整数を示し、但し、a+bは1以上であり、c+dは1以上である。 - 式(1)中、R102が、
(i)水素原子、又は
(iv)C(O)NR104R105を示し、R104およびR105はそれぞれ独立に、水素原子、またはOH、NR110R111 、またはN(R112)C(O)R113から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R110、R111、R112およびR113はそれぞれ独立に、水素原子、または1以上のOHで置換されていてもよい炭素数1~4の炭化水素基を示す、
請求項1に記載の脂質組成物。 - 式(1)中のR101が、
を示し、
R102が、C(O)NR104R105を示し、
R104およびR105はそれぞれ独立に、水素原子、またはOH、NR110R111 、またはN(R112)C(O)R113から選択される1以上の置換基で置換されていてもよい炭素数1~4の炭化水素基を示し、
R110、R111、R112およびR113はそれぞれ独立に、水素原子、または1以上のOHで置換されていてもよい炭素数1~4の炭化水素基を示す、
請求項1に記載の脂質組成物。 - 式(1)中のR101が、
を示し、R102が、水素原子を示し、R201は、炭素数7~13の鎖状炭化水素基を示す、請求項1に記載の脂質組成物。 - 式(1)で表される化合物が、下記(A)~(M)の何れかで表される化合物である、請求項1から4の何れか一項に記載の脂質組成物。
- 式(1)で表される化合物の含有率が、全脂質に対して10モル%~60モル%である、請求項1から5の何れか一項に記載の脂質組成物。
- 式(2)で表される脂質またはその塩の含有率が、全脂質に対して30モル%~70モル%である、請求項1から6の何れか一項に記載の脂質組成物。
- 前記中性脂質が双性イオン性脂質である、請求項1から7の何れか一項に記載の脂質組成物。
- 前記中性脂質がリン脂質である、請求項1から8のいずれか一項に記載の脂質組成物。
- 前記中性脂質の含有率が、全脂質に対して1モル%~30モル%である、請求項1から9のいずれか一項に記載の脂質組成物。
- 前記の非イオン性親水性高分子を有する脂質が、アシル基を含み、アシル基の炭素鎖長が8~26である、請求項1から10のいずれか一項に記載の脂質組成物。
- 前記の非イオン性親水性高分子を有する脂質の含有率が、全脂質に対して0.1モル%~10モル%である、請求項1から11のいずれか一項に記載の脂質組成物。
- 核酸に対する脂質の重量比が5~100である、請求項1から12のいずれか一項に記載の脂質組成物。
- 細胞に核酸を導入するための組成物である、請求項1から13のいずれか一項に記載の脂質組成物。
- in vivoでの核酸送達のための組成物である、請求項1から13のいずれか一項に記載の脂質組成物。
- 脂質粒子である、請求項1から15の何れか一項に記載の脂質組成物。
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