WO2024171859A1 - pH応答性リン脂質 - Google Patents
pH応答性リン脂質 Download PDFInfo
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- WO2024171859A1 WO2024171859A1 PCT/JP2024/003597 JP2024003597W WO2024171859A1 WO 2024171859 A1 WO2024171859 A1 WO 2024171859A1 JP 2024003597 W JP2024003597 W JP 2024003597W WO 2024171859 A1 WO2024171859 A1 WO 2024171859A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/06—Phosphorus compounds without P—C bonds
- C07F9/08—Esters of oxyacids of phosphorus
- C07F9/09—Esters of phosphoric acids
- C07F9/10—Phosphatides, e.g. lecithin
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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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/24—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing atoms other than carbon, hydrogen, oxygen, halogen, nitrogen or sulfur, e.g. cyclomethicone or phospholipids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/28—Steroids, e.g. cholesterol, bile acids or glycyrrhetinic acid
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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
- A61K48/00—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy
- A61K48/0008—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy characterised by an aspect of the 'non-active' part of the composition delivered, e.g. wherein such 'non-active' part is not delivered simultaneously with the 'active' part of the composition
- A61K48/0025—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy characterised by an aspect of the 'non-active' part of the composition delivered, e.g. wherein such 'non-active' part is not delivered simultaneously with the 'active' part of the composition wherein the non-active part clearly interacts with the delivered nucleic acid
- A61K48/0033—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy characterised by an aspect of the 'non-active' part of the composition delivered, e.g. wherein such 'non-active' part is not delivered simultaneously with the 'active' part of the composition wherein the non-active part clearly interacts with the delivered nucleic acid the non-active part being non-polymeric
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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
Definitions
- the present invention relates to pH-responsive phospholipids.
- mRNA messenger RNA
- RNA As a delivery system for drugs such as RNA, it is known that the drug is administered in a state where it is encapsulated in lipid particles.
- positively charged lipids are usually used to cause electrostatic interactions, which raises concerns about cytotoxicity (Patent Document 1).
- cytotoxicity can be reduced when the lipid particles do not have a positive charge at the pH of body fluids (usually in the neutral range).
- the present invention aims to provide lipid particles that are not positively charged at the pH of body fluids (usually in the neutral range) and that are capable of more efficiently exerting the effects of an encapsulated drug, and lipids for forming the lipid particles.
- a further aim of the present invention is to provide lipid particles that are capable of more efficiently encapsulating a drug and/or have a size suitable for more efficiently delivering the drug, and lipids for forming the lipid particles.
- phospholipids represented by general formula (1) can form lipid particles that are not positively charged at the pH of body fluids (usually in the neutral range) and that allow the encapsulated drug to exert its effects more efficiently.
- the present invention encompasses the following aspects:
- R1 and R2 may be the same or different and each represent a chain hydrocarbon group.
- R3 , R4 , and R5 may be the same or different and each represent a hydrocarbon group having 1 to 5 carbon atoms.
- m represents 1 or 2
- n represents 1 or 2
- p represents a natural number from 1 to 3.
- the phospholipid according to item 1, wherein R 3 , R 4 and R 5 are the same or different and each represent a hydrocarbon group having 1 to 3 carbon atoms. 3.
- the lipid particle according to item 8 which encapsulates a drug.
- the lipid particle according to item 9 wherein the drug is a polynucleotide.
- the lipid particle according to item 10, wherein the polynucleotide is messenger RNA. 12.
- a method for producing lipid particles comprising a step of mixing the alcohol solution according to item 15 or 16 with an acidic aqueous solution containing a water-soluble drug. 18.
- a medicine comprising the lipid particle according to any one of items 8 to 14.
- the present invention provides lipid particles that are not positively charged at the pH of body fluids (usually in the neutral range) and that allow the encapsulated drug to exert its effect more efficiently, as well as lipids for forming the lipid particles.
- This allows the drug (e.g., polynucleotides such as mRNA) to exert its effect more efficiently while further reducing cytotoxicity.
- FIG. 1 shows the results of a luciferase expression test, and is a diagram showing the results of imaging using Examples 3 and 4.
- FIG. 1 shows the results of a luciferase expression test, and is a graph of the total amount of luminescence in Examples 3 and 4.
- FIG. 1 shows the results of a luciferase expression test, and is a diagram showing the results of imaging using Comparative Examples 2 and 3.
- FIG. 1 shows the results of a luciferase expression test, and is a graph showing the total amount of luminescence in Comparative Examples 2 and 3.
- FIG. 1 shows the particle size distribution of the lipid particle solution produced in Example 5.
- FIG. 13 is a graph showing the particle size distribution of the lipid particle solution produced in Comparative Example 4.
- 1 shows the results of evaluating the in vivo distribution of lipid particles 4 hours after administration of a lipid particle solution, including the heart, lungs, liver, kidneys, spleen, left thigh muscle, plasma, right subiliac lymph node (A), and left subiliac lymph node (B).
- 1 shows the results of evaluating the in vivo distribution of lipid particles 24 hours after administration of a lipid particle solution, including the heart, lungs, liver, kidneys, spleen, left thigh muscle, plasma, right subiliac lymph node (A), and left subiliac lymph node (B).
- This is a diagram obtained by deleting the left thigh muscle, right subiliac lymph node (A), and left subiliac lymph node (B) from FIG.
- Phospholipids in one aspect, the present invention relates to a phospholipid represented by the general formula (1):
- R 1 and R 2 may be the same or different and represent a chain hydrocarbon group; R 3 , R 4 and R 5 may be the same or different and represent a hydrocarbon group having 1 to 5 carbon atoms; m is 1 or 2, n is 1 or 2, and p is a natural number from 1 to 3) (sometimes referred to as "the phospholipid of the present invention” in this specification). This will be explained below.
- R1 and R2 may be the same or different and are not particularly limited as long as they are chain hydrocarbon groups, and include both linear and branched chains.
- the number of carbon atoms in the chain hydrocarbon group is not particularly limited as long as it is a number capable of forming lipid particles, and is, for example, 4 to 30, preferably 8 to 26, more preferably 12 to 24, even more preferably 14 to 20, and even more preferably 15 to 19.
- the chain hydrocarbon group includes both saturated chain hydrocarbon groups and unsaturated hydrocarbon groups, but is preferably an unsaturated chain hydrocarbon group, more preferably an unsaturated chain hydrocarbon group containing a double bond, and even more preferably an unsaturated chain hydrocarbon group having only one double bond.
- chain hydrocarbon groups include butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, tridecyl, tetradecyl, pentadecyl, 9-pentadecenyl, hexadecyl, heptadecyl, cis-9-heptadecenyl, 11-heptadecenyl, cis,cis-9,12-heptadecadienyl, 9,12,15-heptadecanthrienyl, 6,9,12-heptadecanthrienyl, 9,11,13-heptadecanthrienyl, nonadecyl, 8,11-nonadecadienyl, 5,8,11-nonadecatrienyl, 5,8,11,14-nonadecatetraenyl, henicosyl, tricosyl, cis-15-tri
- R 1 and R 2 are unsaturated chain hydrocarbon group, and it is more preferable that both are unsaturated chain hydrocarbon groups.
- R 3 , R 4 and R 5 are the same or different and are hydrocarbon groups having 1 to 5 carbon atoms.
- the hydrocarbon group is a monovalent hydrocarbon group and is not particularly limited as long as it has 1 to 5 carbon atoms.
- the monovalent hydrogen group is preferably a chain hydrocarbon group, and more preferably an alkyl group.
- the number of carbon atoms in the hydrocarbon group is preferably 1 to 3, more preferably 1 to 2, and even more preferably 1.
- Examples of the hydrocarbon group include methyl, ethyl, propyl, butyl, pentyl, etc., and among these, methyl is preferred.
- R 3 , R 4 and R 5 are methyl groups, and it is more preferable that all of them are methyl groups.
- m is preferably 2.
- n is preferably 2.
- n and n are preferably both 2.
- p is preferably 1 or 2. From the viewpoint of cytotoxicity, p is more preferably 1.
- the phospholipids of the present invention can be synthesized in a variety of ways.
- the compounds of the present invention can be synthesized according to the following reaction scheme:
- R 1 , R 2 , R 3 , R 4 , R 5 , m, n, and p are the same as above.
- the compound can be synthesized according to or analogously thereto.
- the amount of the compound represented by general formula (B) used is preferably 1 to 20 moles, and more preferably 5 to 10 moles, per mole of the compound represented by general formula (A) from the viewpoint of yield, etc.
- the amount of phospholipase D used is preferably 100 to 1500 U, more preferably 300 to 700 U, per mole of the compound represented by general formula (A).
- 1 U is defined as the amount of enzyme (1 micromole per minute) that can convert 1 micromole ( ⁇ mol) of substrate per minute under optimal conditions (temperature of 30°C, acidity at which the chemical reaction proceeds most).
- This reaction is carried out in the presence of a solvent.
- a solvent there are no particular limitations on the solvent as long as it is a solvent that can exert the activity of phospholipase D.
- various buffer solutions are suitably used.
- As a buffer solution an acetate buffer solution is preferable.
- the pH of the solvent is preferably 4 to 7, more preferably 5 to 6.
- the reaction system may contain various organic solvents (e.g., ethyl acetate, etc.) to dissolve the compound represented by general formula (A).
- This reaction is typically carried out by mixing an organic solvent solution of a compound represented by general formula (A) with an aqueous solvent solution of a compound represented by general formula (B) and adding phospholipase D thereto.
- additives can also be used in this reaction as long as they do not significantly impair the progress of the reaction.
- the reaction temperature is not particularly limited as long as it is a temperature at which phospholipase D can exert its activity, and is usually 20 to 50°C, preferably 35 to 45°C.
- the reaction time is not particularly limited as long as it is a time during which phospholipase D can exert its activity, and is usually 2 to 150 hours, preferably 8 to 100 hours, and more preferably 12 to 24 hours.
- the solvent is distilled off, and the product can be isolated and purified by a conventional method such as chromatography, recrystallization, etc.
- the structure of the product can be identified by elemental analysis, MS (FD-MS) analysis, IR analysis, 1 H-NMR, 13 C-NMR, etc.
- ionized lipids have been developed and made into nanoparticles to improve the safety of lipid nanoparticles.
- Ionized lipids are acidic and positively charged, and the change in effective charge at that time is 0 ⁇ +1.
- the change in effective charge of the phospholipids (charge-reversible lipids) of the present invention can be in the range of -1 to +2, which is a different perspective.
- the phospholipids of the present invention are ionized even under neutral conditions, and may have different physicochemical properties from ionized lipids.
- the lipids of the present invention can also behave as amphipathic lipids even under neutral conditions, and therefore can be expected to have higher stability and higher safety.
- lipid particles that do not have a positive charge at the pH of body fluids (usually in the neutral range) and that are capable of more efficiently exerting the effects of the encapsulated drug.
- the phospholipids of the present invention can achieve the effects of the present invention even if they are phospholipid salts.
- Such phospholipid salts which are salts of the phospholipids of the present invention, are also part of the present invention.
- matters described as phospholipids are a concept that also includes phospholipid salts.
- Lipid Particles One aspect of the present invention relates to lipid particles (sometimes referred to as “lipid particles of the present invention” herein) containing the phospholipid of the present invention (sometimes referred to as “phospholipid A” herein). This will be described below.
- the lipid particles of the present invention are not particularly limited as long as they contain the phospholipid of the present invention as a particle-constituting lipid.
- the phospholipid of the present invention contained in the lipid particles may be one type alone or a combination of two or more types.
- Examples of the lipid particles of the present invention include particles in which an amphipathic lipid including the phospholipid of the present invention constitutes an outer layer, and the lipid is arranged with the hydrophilic portion facing outward.
- the particles include particles whose outer layer is made of a lipid monolayer membrane and particles whose outer layer is made of a lipid bilayer membrane, preferably particles whose outer layer is made of a lipid monolayer membrane, and more preferably particles in which amphipathic lipids are arranged in the lipid monolayer membrane of the outer layer with the hydrophilic portion facing outward.
- the inner layer of the particle may be made of a uniform phase of an aqueous phase or an oil phase, but preferably contains one or more reverse micelles.
- the particle size of the lipid particles of the present invention is not particularly limited.
- the particle size is preferably nano-sized, specifically, for example, 10 to 700 nm, preferably 20 to 500 nm, more preferably 30 to 250 nm, even more preferably 30 to 150 nm, even more preferably 40 to 120 nm, and particularly preferably 50 to 100 nm.
- the lipid particles of the present invention do not have a positive charge at the pH of body fluids (usually in the neutral range). More specifically, the lipid particles of the present invention have a zeta potential in a Tris-HCl buffer solution of pH 7.4 of -80 to -1 mV, -50 to -1 mV, -40 to -1 mV, or -30 to -1 mV.
- the lipid particles of the present invention may contain other lipids as particle-constituting lipids in addition to the phospholipids of the present invention.
- Specific examples of lipids include phospholipids, glycolipids, sterols, saturated or unsaturated fatty acids, etc.
- phospholipids include phosphatidylcholines such as dilauroylphosphatidylcholine, dimyristoylphosphatidylcholine, dipalmitoylphosphatidylcholine, distearoylphosphatidylcholine, dioleoylphosphatidylcholine, dilinoleoylphosphatidylcholine, myristoylpalmitoylphosphatidylcholine, myristoylstearoylphosphatidylcholine, and palmitoylstearoylphosphatidylcholine; dilauroylphosphatidylglycerol, dimyristoylphosphatidylglycerol, dipalmitoylphosphatidylglycerol, distearoylphosphatidylglycerol, dioleoylphosphatidylglycerol, dilinoleoylphosphatidylglycerol, myristoyl
- PEG polyethylene glycol
- glycolipids include glyceroglycolipids such as diglycosyl diglyceride, digalactosyl diglyceride, galactosyl diglyceride, and glycosyl diglyceride; sphingoglycolipids such as galactosylcerebroside and ganglioside; stearyl glucoside, esterified stearyl glycoside, etc.
- sterols include cholesterol, cholesteryl hemisuccinate, lanosterol, dihydrolanosterol, desmosterol, dihydrocholesterol, phytosterol, stigmasterol, zymosterol, ergosterol, sitosterol, campesterol, and brassicasterol.
- the sterols since the sterols have the effect of stabilizing the liposome membrane and regulating the fluidity of the liposome membrane, it is desirable that they are included as constituent lipids of the liposome membrane.
- saturated or unsaturated fatty acids include saturated or unsaturated fatty acids having 10 to 22 carbon atoms, such as decanoic acid, myristic acid, palmitic acid, stearic acid, arachidonic acid, oleic acid, linoleic acid, linolenic acid, eicosapentaenoic acid, docosanoic acid, and docosahexaenoic acid.
- the above lipids may be used alone or in combination of two or more.
- the lipid particles of the present invention preferably contain a phospholipid other than the phospholipids of the present invention (sometimes referred to as "phospholipid B" in this specification) and a sterol.
- Phospholipid B preferably has a saturated chain hydrocarbon group.
- Phospholipid B is preferably phosphatidylcholine, and more preferably dipalmitoylphosphatidylcholine.
- the sterol is preferably cholesterol.
- the content is, for example, 15 to 100 moles, preferably 30 to 70 moles, more preferably 40 to 60 moles, and even more preferably 45 to 55 moles, per 100 moles of the phospholipid of the present invention.
- the content is, for example, 5 to 70 moles, preferably 5 to 40 moles, more preferably 5 to 30 moles, and even more preferably 10 to 15 moles, per 100 moles of the phospholipid of the present invention.
- the content thereof is, for example, 30 to 200 moles, preferably 60 to 140 moles, more preferably 80 to 120 moles, even more preferably 90 to 110 moles, and even more preferably 95 to 105 moles, per 100 moles of the phospholipid of the present invention.
- the content of phospholipid B is, for example, 10 to 100 moles, preferably 10 to 70 moles, more preferably 15 to 40 moles, and even more preferably 20 to 30 moles, per 100 moles of sterol.
- the content is, for example, 10 to 100 moles, preferably 10 to 70 moles, more preferably 15 to 40 moles, and even more preferably 20 to 30 moles, per 100 moles of the phospholipid of the present invention.
- the total content of the phospholipids of the present invention and other lipids (in a preferred embodiment, phospholipid B and sterols) that are blended as necessary is, for example, 40 to 160 moles, preferably 50 to 150 moles, more preferably 60 to 140 moles, even more preferably 70 to 130 moles, and even more preferably 80 to 125 moles, per 100 moles of lipids constituting the lipid particles of the present invention.
- a portion of the phospholipid may be modified with a water-soluble polymer such as PEG.
- the content of the PEG-modified phospholipid is, for example, 0 to 50 mol, preferably 0 to 30 mol, more preferably 0 to 20 mol, and even more preferably 0 to 15 mol, per 100 mol of lipid constituting the lipid particles of the present invention.
- the lipid particles of the present invention do not need to be modified with PEG lipid, i.e., they do not need to contain PEG lipid.
- the lipid particles of the present invention preferably encapsulate a drug.
- the drug is not particularly limited, and examples thereof include polynucleotides, peptides, proteins, sugars, low molecular weight compounds, etc.
- the drug is preferably negatively charged and water-soluble.
- polynucleotides can be preferably used.
- the target diseases of the drug are not particularly limited, and examples thereof include infectious diseases (particularly suitable for use as a vaccine against infectious diseases), cancer (particularly solid cancers), etc.
- the polynucleotide is not particularly limited as long as it can function as a drug, but examples include mRNA, siRNA, miRNA, antisense nucleic acid, expression vectors thereof, protein expression vectors, nucleic acids for genome editing (e.g., guide RNA, Cas protein expression vector, TALEN expression vector, etc.), nucleic acid vaccines, etc.
- mRNA messenger RNA
- the mRNA used in the present invention encompasses both modified and unmodified RNA.
- the mRNA may include one or more coding and non-coding regions.
- the mRNA may be purified from natural sources, produced using a recombinant expression system and optionally purified, chemically synthesized, etc. If appropriate, for example in the case of chemically synthesized molecules, the mRNA may include nucleoside analogs, e.g., analogs having chemically modified bases or sugars, backbone modifications, etc.
- the mRNA sequence is shown in the 5' to 3' direction unless otherwise specified.
- the mRNA is comprised of natural nucleosides (e.g., adenosine, guanosine, cytidine, uridine), nucleoside analogs (e.g., 2-aminoadenosine, 2-thiothymidine, inosine, pyrrolo-pyrimidine, 3-methyladenosine, 5-methylcytidine, C-5 propynyl-cytidine, C-5 propynyl-uridine, 2-aminoadenosine, C5-bromouridine, C5-fluorouridine, C5-iodouridine, C5-propynyl-uridine, C5-propynyl-cytidine, C5-methyl ...
- natural nucleosides e.g., adenosine, guanosine, cytidine, uridine
- the mRNA used in the present invention may contain one or more non-standard nucleotide residues.
- Non-standard nucleotide residues may include, for example, 5-methyl-cytidine ("5mC"), pseudouridine (“ ⁇ U”), and/or 2-thio-uridine (“2sU”).
- 5mC 5-methyl-cytidine
- ⁇ U pseudouridine
- 2sU 2-thio-uridine
- Such residues and incorporation into the mRNA may be achieved by known methods.
- the mRNA may be RNA defined as RNA in which 25% of the U residues are 2-thio-uridine and 25% of the C residues are 5-methylcytidine.
- the RNA may be used by known methods.
- the presence of non-standard nucleotide residues may improve the stability and/or reduce the immunogenicity of the mRNA compared to a control mRNA having the same sequence but containing only standard residues.
- the mRNA may include one or more non-standard nucleotide residues selected from isocytosine, pseudoisocytosine, 5-bromouracil, 5-propynyluracil, 6-aminopurine, 2-aminopurine, inosine, diaminopurine, and 2-chloro-6-aminopurine cytosine, and combinations of these modifications and other nucleobase modifications. Certain embodiments may further include additional modifications to the furanose ring or nucleobase.
- Additional modifications include, for example, sugar modifications or substitutions (e.g., one or more 2'-O-alkyl modifications, locked nucleic acids (LNAs)).
- the RNA may be complexed or hybridized to additional polynucleotides and/or peptide polynucleotides (PNAs).
- PNAs polypeptide polynucleotides
- such modifications include, but are not limited to, 2'-deoxy-2'-fluoro, 2'-O-methyl, 2'-O-methoxyethyl, and 2'-deoxy modifications.
- any of these modifications may be present in 0-100% of the nucleotides, e.g., 0%, 1%, 10%, 25%, 50%, 75%, 85%, 90%, greater than 95% or 100% of the constituent nucleotides.
- the drug is preferably contained in the inner layer of the lipid particle of the present invention.
- the drug is preferably contained within a reverse micelle in the inner layer.
- the weight ratio of the lipid constituting the lipid particle of the present invention to the drug is, for example, 0 to 500, preferably 0 to 300, more preferably 0 to 100, even more preferably 5 to 50, even more preferably 10 to 40, and particularly preferably 15 to 35, when the drug is a polynucleotide such as mRNA.
- the lipid particles of the present invention may contain other components in addition to those mentioned above.
- other components include membrane stabilizers, charged substances, antioxidants, membrane proteins, polyethylene glycol (PEG), antibodies, peptides, sugar chains, etc.
- Antioxidants can be included to prevent oxidation of the membrane, and are used as necessary as a component of the membrane.
- antioxidants used as components of the membrane include butylated hydroxytoluene, propyl gallate, tocopherol, tocopherol acetate, concentrated mixed tocopherols, vitamin E, ascorbic acid, L-ascorbic acid stearate, ascorbic acid palmitate, sodium bisulfite, sodium sulfite, sodium edetate, erythorbic acid, citric acid, etc.
- Membrane proteins can be included to add functionality to the membrane or to stabilize the membrane structure, and are used as membrane components as necessary.
- membrane proteins include surface membrane proteins, integral membrane proteins, albumin, and recombinant albumin.
- the content of other components is, for example, 20% or less, preferably 10% or less, relative to 100% by mass of the lipid particle solution containing the lipid particles of the present invention.
- the lipid particles of the present invention can be produced according to or in accordance with a known method for producing lipid particles.
- the lipid particles of the present invention can be preferably produced by a method including a step (step 1) of mixing an alcohol solution containing the phospholipid of the present invention with an acidic aqueous solution containing a water-soluble drug.
- the alcohol that is the solvent of the alcohol solution is not particularly limited as long as it is an alcohol that can dissolve phospholipids.
- the alcohol is preferably ethanol or butanol, more preferably ethanol or t-butanol, and more preferably ethanol.
- An acidic aqueous solution usually contains an acid in addition to the water-soluble drug and water as a solvent.
- acids include organic acids and inorganic acids, and preferably organic acids.
- organic acids include maleic acid, formic acid, acetic acid, propionic acid, folic acid, isobutyric acid, valeric acid, isovaleric acid, pyruvic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, ketoglutaric acid, adipic acid, lactic acid, tartaric acid, fumaric acid, oxaloacetic acid, malic acid, isocitrate, citric acid, benzoic acid, phthalic acid, isophthalic acid, terephthalic acid, hemimellitic acid, trimellitic acid, trimesic acid, mellophanic acid, prenitic acid, pyromellitic acid, mellitic acid, methanesulfonic acid, benzenesulfonic acid,
- inorganic acids examples include hydrochloric acid, sulfuric acid, nitric acid, carbonic acid, boric acid, boronic acid, hydrofluoric acid, hypochlorous acid, chlorous acid, chloric acid, perchloric acid, hypobromous acid, bromous acid, bromic acid, perbromic acid, hypoiodous acid, iodous acid, iodic acid, periodic acid, phosphorous acid, phosphoric acid, polyphosphoric acid, chromic acid, permanganic acid, and amberlyst.
- the acids may be used alone or in combination of two or more.
- the pH of the acidic aqueous solution is preferably 3 to 5.
- the mixing ratio of the acidic aqueous solution to the alcoholic solution is, for example, 1.5 to 10, preferably 2 to 8, more preferably 3 to 7, even more preferably 3.5 to 5.5, and even more preferably 4 to 5.
- the mixing is not particularly limited as long as the phospholipid of the present invention and the drug are in a form that allows mixing, but is usually carried out using a reaction system that uses a microchannel. In such cases, various conditions can be adjusted appropriately depending on the reaction system.
- the present invention relates to a pharmaceutical (sometimes referred to as the "pharmaceutical of the present invention" in this specification) containing the lipid particles of the present invention encapsulating a drug.
- a pharmaceutical sometimes referred to as the "pharmaceutical of the present invention” in this specification
- the lipid particles of the present invention encapsulating a drug can also be used as a reagent.
- the lipid particles of the present invention can exert the effects of drugs (e.g., polynucleotides such as mRNA) more efficiently while further reducing cytotoxicity. Therefore, the lipid particles of the present invention can be suitably used as drug carriers.
- drugs e.g., polynucleotides such as mRNA
- the content of the active ingredient in the pharmaceutical of the present invention can be about 0.0001 parts by weight to 100 parts by weight, assuming that the pharmaceutical of the present invention as a whole is 100 parts by weight.
- the administration form of the pharmaceutical of the present invention is not particularly limited as long as the desired effect is obtained, and it can be administered to mammals, including humans, by either oral administration or parenteral administration (e.g., intravenous injection, intramuscular injection, subcutaneous administration, rectal administration, transdermal administration, topical administration).
- parenteral administration e.g., intravenous injection, intramuscular injection, subcutaneous administration, rectal administration, transdermal administration, topical administration.
- the preferred administration form is parenteral administration.
- Dosage forms for oral administration and parenteral administration and their manufacturing methods are well known to those skilled in the art, and can be manufactured in accordance with conventional methods by mixing the active ingredient with a pharma- ceutically acceptable carrier, etc.
- Dosage forms for parenteral administration include injectable preparations (e.g., drip injections, intravenous injections, intramuscular injections, subcutaneous injections, intradermal injections), topical preparations (e.g., ointments, poultices, lotions), suppositories, inhalants, eye preparations, eye ointments, nasal drops, ear drops, liposomes, etc.
- injectable preparations are prepared by dissolving the lipid particles of the present invention in distilled water for injection, and solubilizing agents, buffers, pH adjusters, isotonicity agents, soothing agents, preservatives, stabilizers, etc. can be added as necessary.
- the pharmaceutical can also be a freeze-dried preparation for preparation when needed.
- the medicine of the present invention may further contain other drugs that are effective in treating or preventing diseases.
- the medicine of the present invention may also contain ingredients such as bactericides, anti-inflammatory agents, cell activators, vitamins, and amino acids, as necessary.
- the carriers used in the formulation of the pharmaceutical of the present invention may include excipients, binders, disintegrants, lubricants, colorants, flavorings, and odorants commonly used in the relevant technical field, as well as stabilizers, emulsifiers, absorption promoters, surfactants, pH adjusters, preservatives, antioxidants, bulking agents, wetting agents, surface activators, dispersants, buffers, preservatives, solubilizers, soothing agents, etc., as necessary.
- the dosage of the pharmaceutical of the present invention can be determined by a clinician based on various factors, such as the route of administration, the type of disease, the severity of symptoms, the age, sex, and body weight of the patient, the severity of the disease, pharmacological knowledge such as pharmacokinetic and toxicological characteristics, whether or not a drug delivery system is used, and whether or not the pharmaceutical is administered as part of a combination of other drugs.
- the dosage of the pharmaceutical of the present invention can be, for example, about 1 ⁇ g/kg (body weight) to 10 g/kg (body weight) per day.
- the administration schedule of the pharmaceutical of the present invention can also be determined taking into account the same factors as the dosage. For example, the above daily dosage can be administered once a day to once a month.
- Dioleoylphosphatidylcholine (1.5 g) was dissolved in ethyl acetate (18.2 g) at 40°C, and then amine-containing acetate buffer (7.9 g) in which phospholipase D (2.8 mg, Asahi Kasei Pharma) was dissolved and ethyl acetate (12.0 g) were added, and the mixture was stirred at 40°C for 19 hours.
- Ethyl acetate, toluene, methanol, and an aqueous solution of sodium chloride were added to the obtained solution, and the mixture was stirred and allowed to stand. The organic layer was separated, and the organic layer was washed with an aqueous solution of sodium chloride and methanol.
- the solvent was removed from the obtained organic layer by distillation under reduced pressure to obtain a crude product.
- the obtained crude product was dissolved in ethyl acetate (7.5 mL) while heating. After cooling to room temperature, 4M hydrogen chloride/ethyl acetate (1.4 mL) was added. Acetone (35.0 mL) was then added dropwise, and the mixture was stirred for 25 minutes while cooling in an ice bath. The resulting suspension was filtered, the solid was washed with acetone, and then vacuum dried to obtain a solid. THF (13.0 mL) was added to the resulting solid, and the mixture was stirred. Acetone (33.0 mL) was further added dropwise, and the mixture was cooled in an ice bath. The resulting suspension was filtered, and the solid was washed with acetone, and then vacuum dried to obtain compound a (0.35 g).
- Example 2 Preparation of lipid particle solution
- Compound a synthesized in Example 1, dipalmitoyl phosphatidylcholine, and cholesterol were added to ethanol in a molar ratio of 45:10:45 to prepare an alcohol solution of phospholipids (lipid concentration: 0.99 mM).
- Gaussia luciferase mRNA or firefly luciferase mRNA was added to 1 mM sodium citrate/citric acid aqueous solution (pH 4.5) to prepare an acidic mRNA aqueous solution.
- lipid particle solution Preparation of lipid particle solution A lipid particle solution was prepared in the same manner as in Example 2, except that dioleoylglycerophosphate-diethylenediamine (DOP-DEDA) was used instead of compound a.
- DOP-DEDA dioleoylglycerophosphate-diethylenediamine
- Example 2 and Comparative Example 1 were evaluated under the following measurement conditions.
- the lipid particle solution was diluted with 10 mM Tris-HCl buffer (pH 7.4) or 1 mM sodium citrate/citric acid aqueous solution (pH 4.5), and then the ⁇ potential was measured using a Litesizer 500.
- Example 3 Preparation of lipid particle solution A lipid particle solution was prepared using firefly luciferase mRNA in the same manner as in Example 2. Furthermore, the prepared lipid particle solution was ultrafiltered with Amicon Ultra-4 (Millipore) to concentrate the lipid particle solution (final mRNA concentration: 25 ng/ ⁇ L). After concentration, sucrose was added to the lipid particle solution so that the final sucrose concentration was 0.3 M, and the lipid particle solution of Example 3 was produced.
- Amicon Ultra-4 Micropore
- Example 4 Preparation of lipid particle solution
- Compound a dipalmitoyl phosphatidylcholine, cholesterol, and dimyristoyl glycerol-polyethylene glycol 2000 were added to ethanol in a molar ratio of 45:10:45:1.5 to prepare an alcoholic lipid solution (lipid concentration: 0.99 mM).
- mRNA was added to 1 mM sodium citrate/citric acid aqueous solution (pH 4.5) to prepare an acidic mRNA aqueous solution.
- pH 4.5 sodium citrate/citric acid aqueous solution
- the lipid particle solution was prepared by dialysis against ultrapure water at 4°C for 8 hours.
- lipid particle solution (equivalent to 1.25 ⁇ g of mRNA) was intramuscularly administered to the left thigh muscle of each mouse (BALB/c, female, 6 weeks old). 4, 6, 8, and 24 hours after administration of the lipid particle solution, the expression effect of luciferase was evaluated using IVIS Lumina System (manufactured by Xenogen). 10 minutes before imaging, D-luciferin potassium salt (manufactured by BioVision) 150 mg/kg body weight was administered intraperitoneally to confirm the results of luminescence. Furthermore, the administration site was used as the region of interest, and the total luminescence was quantified.
- the imaging results for Examples 3 and 4 are shown in Figure 1, and a graph of the total amount of light emitted is shown in Figure 2.
- the imaging results for Comparative Examples 2 and 3 are shown in Figure 3, and a graph of the total amount of light emitted is shown in Figure 4.
- Example 5 Preparation of Lipid Particle Solution
- a lipid particle solution was prepared using firefly luciferase mRNA.
- Example 6 [ 3H ] Cholesteryl hexadecyl ether dissolved in toluene was removed by vacuum distillation, and then dissolved in ethanol. The obtained solution was mixed with a phospholipid solution in which compound a, dipalmitoyl phosphatidylcholine, cholesterol, and dimyristoyl glycerol-polyethylene glycol 2000 were dissolved in ethanol at a molar ratio of 45:10:45:1.5 to prepare an alcoholic lipid solution. In addition, OVA mRNA was added to 50 mM acetate buffer (pH 5.0) to prepare an acidic mRNA aqueous solution.
- Example 7 A lipid particle solution was prepared in the same manner as in Example 6, except that instead of the phospholipid solution in which compound A, dipalmitoylphosphatidylcholine, cholesterol, and dimyristoylglycerol-polyethylene glycol 2000 were dissolved in ethanol in a molar ratio of 45:10:45:1.5, a phospholipid solution in which compound A, dipalmitoylphosphatidylcholine, and cholesterol were dissolved in ethanol in a molar ratio of 45:10:45 was used.
- Example 5 A lipid particle solution was prepared in the same manner as in Example 6, except that DOP-DEDA was used instead of compound a in Example 6.
- SM-102, distearoylphosphatidylcholine, cholesterol, and dimyristoylglycerol-polyethylene glycol 2000 were added to ethanol in a molar ratio of 50:10:38.5:1.5 to prepare an alcoholic lipid solution (lipid concentration: 0.99 mM).
- OVA mRNA was added to 6.25 mM acetate buffer (pH 5.0) to prepare an acidic mRNA aqueous solution.
- the lipid particle solution containing lipid particles was produced by ultrafiltration at 4°C with RNase-free water to remove ethanol.
- lipid particle solution 50 ⁇ L of lipid particle solution was intramuscularly administered to the left thigh muscle of each mouse (C57BL/6J, female, 6 weeks old).
- blood was removed under isoflurane anesthesia, and each organ (heart, lung, liver, kidney, spleen, left thigh muscle, plasma, right subiliac lymph node (A), left subiliac lymph node (B)) was removed and weighed.
- the liver was cut to about 100 mg.
- the blood was transferred to a tube and centrifuged at 3000 rpm for 10 minutes at 4 ° C. After centrifugation, 100 ⁇ L of serum was used as a measurement sample.
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Abstract
Description
で表されるリン脂質。
2.R3、R4及びR5は同一又は異なって、炭素数1~3の炭化水素基を示す、項1に記載のリン脂質。
3.m及びnが2である、項1又は2に記載のリン脂質。
4.pが1である、項1~3のいずれかに記載のリン脂質。
5.R1及びR2は同一又は異なって、炭素数12~24の鎖式炭化水素基を示す項1~4のいずれかに記載のリン脂質。
6.鎖式炭化水素基が不飽和鎖式炭化水素基である、項1~5のいずれかに記載のリン脂質。
7.項1~6のいずれかに記載のリン脂質の塩である、リン脂質塩。
8.項1~6のいずれかに記載のリン脂質(リン脂質A)を含有する、脂質粒子。
9.薬物を内包する、項8に記載の脂質粒子。
10.薬物がポリヌクレオチドである、項9に記載の脂質粒子。
11.ポリヌクレオチドがメッセンジャーRNAである、項10に記載の脂質粒子。
12.ステロールを含有する、項8~11のいずれかに記載の脂質粒子。
13.ポリエチレングリコール(PEG)脂質を含まない、項8~12のいずれかに記載の脂質粒子。
14.更に、前記リン脂質A以外のリン脂質(リン脂質B)を含有する、項8~13のいずれかに記載の脂質粒子。
15-1.項1~6のいずれかに記載のリン脂質を含有する、アルコール溶液。
15-2.項7に記載のリン脂質塩を含有する、アルコール溶液。
16.アルコール溶液中のアルコールがエタノールである、項15に記載のアルコール溶液。
17.項15又は16に記載のアルコール溶液と水溶性薬物を含有する酸性水溶液とを混合する工程を含む、脂質粒子の製造方法。
18.項8~14のいずれかに記載の脂質粒子を含有する、医薬。
本発明は、その一態様として、一般式(1):
に従って又は準じて合成することができる。
本発明は、その一態様として、本発明のリン脂質(本明細書において、「リン脂質A」と示すこともある。)を含有する、脂質粒子(本明細書において、「本発明の脂質粒子」と示すこともある。)に関する。以下に、これについて説明する。
本発明は、その一態様として、薬物を内包する本発明の脂質粒子を含有する、医薬(本明細書において、「本発明の医薬」と示すこともある。)に関する。また、薬物を内包する本発明の脂質粒子は、試薬としても利用することができる。
2-[2-[(ジメチルアミノ)エチル]メチルアミノ]エチル 1,2-ジオレオイル-sn-グリセロ-3-ホスフェート(化合物a)の合成
下記の合成方法により、以下の化学式で示される化合物aを合成した。
1H NMR(300 MHz、溶媒CDCl3):δ=5.38-5.24(m,5H),4.52-4.39(m,2H),4.38-4.35(m,1H),4.18-3.88(m,7H),3.70-3.60(m,2H),3.10(s,3H),3.02(s,6H),2.36-2.27(m,4H),2.02-1.98(m,8H),1.64-1.54(m,4H),1.40-0.91(m,40H),0.88(t,J=6.0Hz,6H).
脂質粒子溶液の製造
実施例1で合成した化合物a、ジパルミトイルホスファチジルコリン、及びコレステロールを45:10:45のモル比でエタノールに添加して、リン脂質のアルコール溶液を調製した(脂質濃度:0.99mM)。また、ガウシアルシフェラーゼmRNAまたはホタルルシフェラーゼmRNAを1mMクエン酸ナトリウム/クエン酸水溶液(pH4.5)に添加して、mRNA酸性水溶液を調製した。これら2つの溶液を、Static型マイクロミキサー(株式会社YMC製)を用いて、脂質溶液とmRNA溶液とをそれぞれ1:4.25の体積比で、25℃で急速混合した(mRNA:脂質=1:30wt/wt)。超純水で4℃、8時間透析することで、脂質粒子を含有する脂質粒子溶液を製造した。
脂質粒子溶液の製造
化合物aに代えて、dioleoylglycerophosphate-diethylenediamine(DOP-DEDA)を用いた以外は、実施例2と同様にして、脂質粒子溶液を製造した。
実施例2及び比較例1で得られた脂質粒子溶液をRNase free waterで希釈した後、Litesizer 500(Anton Paar社製)を用いて脂質粒子の平均粒子径を測定した。
脂質粒子溶液を10 mM Tris-HCl緩衝液(pH7.4)または1 mMクエン酸ナトリウム/クエン酸水溶液(pH4.5)で希釈した後、Litesizer 500を用いてζ電位を測定した。
脂質粒子溶液の製造
実施例2と同様にして、ホタルルシフェラーゼmRNAを用いて脂質粒子溶液を調製した。さらに、調製した脂質粒子溶液をアミコンウルトラ(Amicon Ultra)-4(Millipore社製)で限外濾過し、脂質粒子溶液を濃縮した(最終的なmRNA濃度:25ng/μL)。濃縮後、脂質粒子溶液に最終スクロース濃度が0.3Mとなるようにスクロースを添加して、実施例3の脂質粒子溶液を製造した。
脂質粒子溶液の製造
化合物a、ジパルミトイルホスファチジルコリン、コレステロール、及び、ジミリストイルグリセロール-ポリエチレングリコール2000を45:10:45:1.5のモル比でエタノールに添加して、脂質のアルコール溶液を調製した(脂質濃度:0.99mM)。また、mRNAを1 mMクエン酸ナトリウム/クエン酸水溶液(pH4.5)に添加して、mRNA酸性水溶液を調製した。これら2つの溶液を、Static型マイクロミキサー(YMC製)を用いて、脂質溶液とmRNA溶液をそれぞれ1:4.25の体積比で、25℃で急速混合した(mRNA:脂質=1:30wt/wt)。超純水で4℃、8時間透析して、脂質粒子溶液を製造した。
脂質粒子溶液の製造
化合物aに代えてDOP-DEDAを用い、実施例2と同様にして、ホタルルシフェラーゼmRNAを用いて脂質粒子溶液を調製した。
脂質粒子溶液の製造
化合物aに代えて、DOP-DEDAを用いた以外は実施例4と同様にして、脂質粒子溶液を製造した。
脂質粒子溶液50μL(mRNA 1.25μg相当)をそれぞれマウス(BALB/c、雌性、6週齢)の左大腿筋に筋肉内投与した。脂質粒子溶液の投与から4、6、8、24時間後、ルシフェラーゼの発現効果をIVIS Lumina System(Xenogen社製)を用いて評価した。イメージング10分前にD-ルシフェリンカリウム塩(BioVision社製)150mg/kg body weightを腹腔内投与して、発光の結果を確認した。さらに、投与部位を関心領域として、総発光量を定量した。
脂質粒子溶液の製造
実施例2と同様にして、ホタルルシフェラーゼmRNAを用いて、脂質粒子溶液を製造した。
脂質粒子溶液の製造
ALC-0315、ジステアロイルホスファチジルコリン及びコレステロールを46.3:9.4:42.7のモル比でエタノールに添加して、脂質のアルコール溶液を調製した(脂質濃度:0.99mM)。また、HiBiT mRNAを1mMクエン酸ナトリウム/クエン酸水溶液(pH4.5)に添加して、mRNA酸性水溶液を調製した。これら2つの溶液を、Static型マイクロミキサー(株式会社YMC製)を用いて、脂質溶液とmRNA溶液とをそれぞれ1:3の体積比で、25℃で急速混合した(mRNA:脂質=1:25.5wt/wt)。超純水で4℃、8時間透析することで、脂質粒子を含有する脂質粒子溶液を製造した。
実施例5及び比較例4で製造された脂質粒子溶液をRNase free waterで希釈した後、Litesizer500(Anton Paar社製)を用いて脂質粒子の粒子径を測定した。結果を図5及び6に示す。
トルエンに溶解した[3H]コレステリルヘキサデシルエーテルのトルエンを減圧留去した後、エタノールに溶解させた。得られた溶液と、化合物a、ジパルミトイルホスファチジルコリン、コレステロール、及び、ジミリストイルグリセロール-ポリエチレングリコール2000を45:10:45:1.5のモル比でエタノールに溶解させたリン脂質溶液とを混合して、脂質のアルコール溶液を調製した。また、OVA mRNAを50mM酢酸緩衝液(pH5.0)に添加して、mRNA酸性水溶液を調製した。これら2つの溶液を、Static型マイクロミキサー(株式会社YMC製)を用いて、脂質溶液とmRNA溶液とをそれぞれ1:4.25の体積比で、25℃の条件で急速混合した(mRNA:脂質=1:30wt/wt)。RNase free waterで4℃の条件で限外濾過してエタノールを除去することで、脂質粒子を含有する脂質粒子溶液を製造した。
実施例6の、化合物a、ジパルミトイルホスファチジルコリン、コレステロール、及び、ジミリストイルグリセロール-ポリエチレングリコール2000を45:10:45:1.5のモル比でエタノールに溶解させたリン脂質溶液に代えて、化合物a、ジパルミトイルホスファチジルコリン、及び、コレステロールを45:10:45のモル比でエタノールに溶解させたリン脂質溶液を用いた以外は実施例6と同様にして、脂質粒子溶液を製造した。
実施例6の化合物aに代えて、DOP-DEDAを用いた以外は実施例6と同様にして、脂質粒子溶液を調製した。
SM-102、ジステアロイルホスファチジルコリン、コレステロール、及び、ジミリストイルグリセロール-ポリエチレングリコール2000を50:10:38.5:1.5のモル比でエタノールに添加して、脂質のアルコール溶液を調製した(脂質濃度:0.99mM)。また、OVA mRNAを6.25mM酢酸緩衝液(pH5.0)に添加して、mRNA酸性水溶液を調製した。これら2つの溶液を、Static型マイクロミキサー(株式会社YMC製)を用いて、脂質溶液とmRNA溶液とをそれぞれ1:4.25の体積比で、25℃の条件で急速混合した(mRNA:脂質=1:19.35wt/wt)。RNase free waterで4℃、限外濾過してエタノールを除去することで、脂質粒子を含有する脂質粒子溶液を製造した。
脂質粒子溶液50μLをそれぞれマウス(C57BL/6J、雌性、6週齢)の左大腿筋に筋肉内投与した。脂質粒子溶液の投与から4時間、又は、24時間後、イソフルラン麻酔下脱血し、さらに各臓器(心臓、肺、肝臓、腎臓、脾臓、左大腿筋、血漿、右腸骨下リンパ節(A)、左腸骨下リンパ節(B))を摘出し、重量を測定した。肝臓は100mg程度となるように切断した。血液はチューブに移し、3000rpm、10分間、4℃の条件で遠心をした。遠心後、血清100μLを測定用サンプルとした。各臓器や血清をバイアルに入れ、Solvable溶液1mLを加え、50℃インキュベーター内で一晩放置した。脱色剤として過酸化水素水、消泡剤として2-プロパノールをそれぞれ1mLずつ加え、数時間放置した。Hionic Flour10mLを入れて振盪させた後、1時間暗所にて放置した。次いで、サンプルの放射活性を液体シンチレーションカウンター(LSC-8000、Aloka社製)を用いて測定した。図7及び8に、4時間、及び、24時間の時点で測定した結果を示す。また、参考のために、図9及び10として、図7及び8から、左大腿筋、右腸骨下リンパ節(A)、左腸骨下リンパ節(B)を削除し、縦軸の数値を変更した図を示す。
Claims (18)
- R3、R4及びR5は同一又は異なって、炭素数1~3の炭化水素基を示す、請求項1に記載のリン脂質。
- m及びnが2である、請求項1又は2に記載のリン脂質。
- pが1である、請求項1又は2に記載のリン脂質。
- R1及びR2は同一又は異なって、炭素数12~24の鎖式炭化水素基を示す請求項1又は2に記載のリン脂質。
- 鎖式炭化水素基が不飽和鎖式炭化水素基である、請求項1又は2に記載のリン脂質。
- 請求項1に記載のリン脂質の塩である、リン脂質塩。
- 請求項1に記載のリン脂質(リン脂質A)を含有する、脂質粒子。
- 薬物を内包する、請求項8に記載の脂質粒子。
- 薬物がポリヌクレオチドである、請求項9に記載の脂質粒子。
- ポリヌクレオチドがメッセンジャーRNAである、請求項10に記載の脂質粒子。
- ステロールを含有する、請求項8に記載の脂質粒子。
- ポリエチレングリコール(PEG)脂質を含まない、請求項8に記載の脂質粒子。
- 更に、前記リン脂質A以外のリン脂質(リン脂質B)を含有する、請求項8に記載の脂質粒子。
- 請求項1に記載のリン脂質を含有する、アルコール溶液。
- アルコール溶液中のアルコールがエタノールである、請求項15に記載のアルコール溶液。
- 請求項15に記載のアルコール溶液と水溶性薬物を含有する酸性水溶液とを混合する工程を含む、脂質粒子の製造方法。
- 請求項8に記載の脂質粒子を含有する、医薬。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2025501065A JPWO2024171859A5 (ja) | 2024-02-02 | pH応答性リン脂質、リン脂質塩、脂質粒子、アルコール溶液、医薬、及び脂質粒子の製造方法 | |
| AU2024223474A AU2024223474A1 (en) | 2023-02-14 | 2024-02-02 | Ph-responsive phospholipid |
| CN202480012689.1A CN120712274A (zh) | 2023-02-14 | 2024-02-02 | pH响应性磷脂 |
| KR1020257028167A KR20250149697A (ko) | 2023-02-14 | 2024-02-02 | pH 응답성 인지질, 인지질염, 지질 입자, 알코올 용액, 의약, 및 지질 입자의 제조 방법 |
| EP24756709.2A EP4667475A1 (en) | 2023-02-14 | 2024-02-02 | Ph-responsive phospholipid |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023-021016 | 2023-02-14 | ||
| JP2023021016 | 2023-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024171859A1 true WO2024171859A1 (ja) | 2024-08-22 |
Family
ID=92421737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2024/003597 Ceased WO2024171859A1 (ja) | 2023-02-14 | 2024-02-02 | pH応答性リン脂質 |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP4667475A1 (ja) |
| KR (1) | KR20250149697A (ja) |
| CN (1) | CN120712274A (ja) |
| AU (1) | AU2024223474A1 (ja) |
| TW (1) | TW202448510A (ja) |
| WO (1) | WO2024171859A1 (ja) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016023147A (ja) | 2014-07-17 | 2016-02-08 | 富士フイルム株式会社 | 脂質粒子および核酸送達キャリア |
| WO2018190017A1 (ja) * | 2017-04-11 | 2018-10-18 | 日本精化株式会社 | 核酸導入用脂質誘導体 |
| WO2022190967A1 (ja) * | 2021-03-09 | 2022-09-15 | 日本精化株式会社 | リン脂質 |
| WO2022259958A1 (ja) * | 2021-06-10 | 2022-12-15 | 日本精化株式会社 | リン脂質 |
-
2024
- 2024-02-02 AU AU2024223474A patent/AU2024223474A1/en active Pending
- 2024-02-02 CN CN202480012689.1A patent/CN120712274A/zh active Pending
- 2024-02-02 EP EP24756709.2A patent/EP4667475A1/en active Pending
- 2024-02-02 WO PCT/JP2024/003597 patent/WO2024171859A1/ja not_active Ceased
- 2024-02-02 KR KR1020257028167A patent/KR20250149697A/ko active Pending
- 2024-02-07 TW TW113105083A patent/TW202448510A/zh unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016023147A (ja) | 2014-07-17 | 2016-02-08 | 富士フイルム株式会社 | 脂質粒子および核酸送達キャリア |
| WO2018190017A1 (ja) * | 2017-04-11 | 2018-10-18 | 日本精化株式会社 | 核酸導入用脂質誘導体 |
| WO2022190967A1 (ja) * | 2021-03-09 | 2022-09-15 | 日本精化株式会社 | リン脂質 |
| WO2022259958A1 (ja) * | 2021-06-10 | 2022-12-15 | 日本精化株式会社 | リン脂質 |
Non-Patent Citations (2)
| Title |
|---|
| HARRIS D. J., ET AL.: "THE DEVELOPMENT OF IMPROVED CATIONIC LIPIDS FOR GENE TRANSFER INTO CYSTIC FIBROSIS AIRWAY EPITHELIAL CELLS.", PHOSPHORUS, SULFUR, AND SILICON AND THE RELATED ELEMENTS, TAYLOR & FRANCIS GROUP, PHILADELPHIA, PA, vol. 109/110., no. 01/04., 1 January 1996 (1996-01-01), Philadelphia, PA, pages 289 - 292., XP000676977, ISSN: 1042-6507 * |
| See also references of EP4667475A1 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20250149697A (ko) | 2025-10-16 |
| JPWO2024171859A1 (ja) | 2024-08-22 |
| AU2024223474A1 (en) | 2025-09-11 |
| CN120712274A (zh) | 2025-09-26 |
| EP4667475A1 (en) | 2025-12-24 |
| TW202448510A (zh) | 2024-12-16 |
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