WO2023101348A1 - 류프로라이드를 포함하는 마이크로 입자 및 이의 제조 방법 - Google Patents
류프로라이드를 포함하는 마이크로 입자 및 이의 제조 방법 Download PDFInfo
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- WO2023101348A1 WO2023101348A1 PCT/KR2022/018982 KR2022018982W WO2023101348A1 WO 2023101348 A1 WO2023101348 A1 WO 2023101348A1 KR 2022018982 W KR2022018982 W KR 2022018982W WO 2023101348 A1 WO2023101348 A1 WO 2023101348A1
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- leuprolide
- microparticles
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- A61K38/00—Medicinal preparations containing peptides
- A61K38/04—Peptides having up to 20 amino acids in a fully defined sequence; Derivatives thereof
- A61K38/08—Peptides having 5 to 11 amino acids
- A61K38/09—Luteinising hormone-releasing hormone [LHRH], i.e. Gonadotropin-releasing hormone [GnRH]; Related peptides
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- 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
- A61K47/26—Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin
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- 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
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
- A61K47/38—Cellulose; Derivatives thereof
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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
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
- A61K9/0024—Solid, semi-solid or solidifying implants, which are implanted or injected in body tissue
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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
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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
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
- A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
- A61K9/1605—Excipients; Inactive ingredients
- A61K9/1629—Organic macromolecular compounds
- A61K9/1641—Organic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poloxamers
- A61K9/1647—Polyesters, e.g. poly(lactide-co-glycolide)
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- A—HUMAN NECESSITIES
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- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
- A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
- A61K9/1682—Processes
- A61K9/1694—Processes resulting in granules or microspheres of the matrix type containing more than 5% of excipient
Definitions
- the present invention relates to microparticles containing leuprolide and a method for preparing the same.
- LHRH luteinizing hormone-releasing hormone
- GnRH gonadotropin-releasing hormone
- LHRH reaches the anterior lobe of the pituitary gland through this capillary network, and reaches gonadotropin target cells through the second capillary network.
- GnRH acts at the membrane level of target cells through a receptor with seven transmembrane segments that couples to phospholipase C via a G protein to increase intracellular calcium flux.
- LHRH agonists and antagonists are indicated for the treatment of endometriosis, fibroids, polycystic ovaries, breast, ovarian and endometrial cancers in women, gonadotropin-pituitary desensitization during medical-assisted birth protocols, benign prostate hyperplasia and prostate in men. It has been shown to be effective in the treatment of cancer and in the treatment of precocious puberty in males or females.
- LHRH agonists are peptide compounds that generally require intravenous or subvenous administration due to their low oral bioavailability.
- LHRH agonists must be administered for a long period of time as drugs for chronic diseases. It is known that drugs of the LHRH agonist series require exposure to a sufficient amount of drug in the early stage for the expression of drug effect.
- Leuprolide acetate one of the LHRH agonists, has a short half-life when conventionally injected subcutaneously or intramuscularly, resulting in a rapid decrease in blood concentration after administration, which disappears within several hours. Due to this, in order to maintain the medicinal effect, there was an inconvenience of daily administration, and in particular, this inconvenience was aggravated due to the characteristics of an injection.
- Patent Document 1 KR 10-2003-0064401 A1
- An object of the present invention relates to microparticles containing leuprolide and a method for preparing the same.
- Another object of the present invention is to reduce the pain due to the small size of the microparticles when administered by injection, to control the release rate of leuprolide at the target site, to prevent the initial overrelease, and to improve the effect of leuprolide To show, it is to provide microparticles containing leuprolide capable of exhibiting the effect of leuprolide for at least one month when exposed to a sufficient amount of the drug.
- Another object of the present invention is to provide a method for preparing microparticles capable of exhibiting a release effect of leuprolide continuously for a long time, wherein the microparticles have a uniform size and a smooth surface.
- the microparticles containing leuprolide according to an embodiment of the present invention include leuprolide and a biodegradable polymer, and the average diameter of the microparticles is 40 to 100 ⁇ m, and the following formula 1
- the value by can be from 0.5 to 2:
- D10 is the particle diameter corresponding to 10% of the maximum value in the cumulative distribution of particles
- D50 is the particle diameter corresponding to 50% of the maximum value in the cumulative distribution of particles
- D90 is the diameter of a particle corresponding to 90% of the maximum value in the cumulative distribution of particles.
- the leuprolide and the biodegradable polymer may be included in a weight ratio of 1:2 to 1:10.
- the release rate of leuprolide is controlled at the target site, so there is no problem of initial over-release, and the testosterone suppression effect by the leuprolide can last for more than one month.
- Equation 2 The value by Equation 2 below may be 1 to 5:
- Microparticles containing leuprolide were administered as an injection to beagle dogs, and the blood concentration of leuprolide was measured.
- Leuprolide acetate administered to the beagle dog by the one injection is 11.25 mg
- C max is the maximum blood concentration of leuprolide for 24 hours after administration of the injection
- C 24h is the blood concentration value of leuprolide in blood collected 24 hours after administration of the injection.
- a method for preparing microparticles containing leuprolide includes: 1) preparing a first mixture by mixing leuprolide and a biodegradable polymer; 2) preparing a second mixture by dissolving a surfactant in a solvent; 3) injecting and flowing the first mixture and the second mixture into the first microchannel and the second microchannel where the intersection points are formed, thereby generating microparticles at the intersection points; 4) collecting the microparticles in a water tank containing the second mixture; 5) removing the organic solvent present in the collected microparticles; and 6) washing and freeze-drying the microparticles from which the organic solvent is removed with purified water, and the value according to Equation 1 below may be 0.5 to 2:
- D10 is the particle diameter corresponding to 10% of the maximum value in the cumulative distribution of particles
- D50 is the particle diameter corresponding to 50% of the maximum value in the cumulative distribution of particles
- D90 is the diameter of a particle corresponding to 90% of the maximum value in the cumulative distribution of particles.
- the pressure When injecting the first mixture into the first microchannel, after injection under a pressure condition of 700 to 1,300 mbar, the pressure is raised under a first condition of 10 to 30 mbar/min, and the injection pressure condition reaches 950 to 1,500 mbar. When, the pressure may be increased to a second condition of 2 to 8 mbar/min.
- the second mixture may be injected into the second microchannel under a pressure condition 2 to 4 times greater than the pressure condition when the first mixture is injected into the first microchannel.
- Step 5) may include: 5-1) primary stirring at 15 to 20° C. for 20 to 40 minutes at a speed of 100 to 300 rpm; 5-2) secondary stirring at 30 to 40° C. for 60 to 120 minutes at a rate of 100 to 300 rpm; and 5-3) 3rd stirring at 40 to 45° C. for 4 to 8 hours at a rate of 100 to 300 rpm.
- the size of the microparticles when administered as an injection, is small, so pain can be reduced, and the release rate of leuprolide is controlled at the target site to prevent over-release in the initial stage, and the effect of leuprolide is shown.
- the effect of leuprolide when exposed to a sufficient amount of the drug, the effect of leuprolide can be seen for more than 1 month.
- microparticles are uniform in size, have a smooth surface, and relate to a method for preparing microparticles capable of continuously releasing leuprolide for a long time.
- 1 is a SEM picture of microparticles according to an embodiment of the present invention.
- 3 is a SEM picture of microparticles according to an embodiment of the present invention.
- 5 is a SEM picture of microparticles according to an embodiment of the present invention.
- FIG. 6 is a SEM picture of microparticles according to an embodiment of the present invention.
- FIG. 7 is a PK-PD result after administering microparticles according to an embodiment of the present invention to a beagle dog as an injection.
- FIG. 8 is a PK-PD result after administering microparticles according to an embodiment of the present invention to a beagle dog as an injection.
- FIG. 9 is a PD result after administering microparticles according to an embodiment of the present invention to a beagle dog as an injection.
- the present invention relates to microparticles containing leuprolide containing leuprolide and a biodegradable polymer, having an average diameter of 40 to 100 ⁇ m, and having a value of 0.5 to 2 according to the following formula 1:
- D10 is the particle diameter corresponding to 10% of the maximum value in the cumulative distribution of particles
- D50 is the particle diameter corresponding to 50% of the maximum value in the cumulative distribution of particles
- D90 is the diameter of a particle corresponding to 90% of the maximum value in the cumulative distribution of particles.
- 'leuprolide' is 5-Oxo-L-prolyl-Lhistidyl-L-tryptophanyl-L-seryl-L-tyrosyl-D-leucyl-L-leucyl-L-arginyl-L-prolyl ethylamide and pharmaceutically acceptable salts thereof.
- the leuprolide may be expressed as leuprorelin, and regardless of labeling, both leuprolide and pharmaceutically acceptable salts thereof may be used.
- 'pharmaceutically acceptable means that it is physiologically acceptable and does not usually cause allergic reactions or similar reactions when administered to humans.
- 'pharmaceutically acceptable salt means an acid addition salt formed by a pharmaceutically acceptable free acid.
- Organic acids and inorganic acids may be used as the free acid.
- the organic acid is not limited thereto, but citric acid, acetic acid, lactic acid, tartaric acid, maleic acid, fumaric acid, formic acid, propionic acid, oxalic acid, trifluoroacetic acid, benzoic acid, gluconic acid, metasulfonic acid, glycolic acid, succinic acid, 4-toluenesulfonic acid , glutamic acid and aspartic acid.
- the inorganic acid includes, but is not limited to, hydrochloric acid, hydrobromic acid, sulfuric acid and phosphoric acid.
- Microparticles containing leuprolide according to an embodiment of the present invention include leuprolide and a biodegradable polymer, and the average diameter of the microparticles is 40 to 100 ⁇ m, and the value according to Equation 1 below is 0.5 to 2 can be:
- D10 is the particle diameter corresponding to 10% of the maximum value in the cumulative distribution of particles
- D50 is the particle diameter corresponding to 50% of the maximum value in the cumulative distribution of particles
- D90 is the diameter of a particle corresponding to 90% of the maximum value in the cumulative distribution of particles.
- the D10, D50, and D90 measure the diameter of the microparticles, and mean values corresponding to 10%, 50%, and 90% of the maximum value on the cumulative distribution.
- Equation 1 defines the average diameter of the particles in claim 1 and at the same time limits the ratio of (D90-D50) and (D50-D10), within the average particle distribution, 90 for the maximum value on the cumulative distribution of the particles
- the difference between the diameter of the particle corresponding to % and the diameter of the particle corresponding to 50%, and the diameter difference between the diameter of the particle corresponding to 50% and the diameter of the particle corresponding to 10% are checked as a ratio to confirm the degree of uniform particle distribution. The closer the value is to 1, the more uniform the distribution width.
- Equation 1 of the present invention is to more clearly confirm the size distribution of the microparticles, and the value according to Equation 1 may be 0.5 to 2, 0.7 to 1.5, and 0.9 to 1.3.
- the value according to Equation 1 is satisfied and the average diameter of the microparticles is 40 to 100 ⁇ m, it means that the size of the microparticles is distributed close to the average diameter value. This is because microparticles having a uniform size are injected into the body through injection, microparticles having a uniform size are biodegraded to a similar degree, and the biodegradation of the microparticles can exhibit an effect of releasing leuprolide.
- the degree of release of leuprolide in the body is highly correlated with the particle size and specific surface area, and it is essential to use microparticles having a uniform diameter in order to increase the specific surface area. .
- microparticles having a very uniform particle size it is possible to prevent over-release at the initial stage when injected into the body, and to show the effect of releasing leuprolide continuously for a long time, so that the effect of leuprolide can be used for more than 1 month.
- the leuprolide and the biodegradable polymer are included in a weight ratio of 1:2 to 1:10, preferably 1:2 to 1:8, and more preferably 1:4 to 1:7.
- leuprolide may exhibit a continuous release effect for a long time due to the decomposition of the biodegradable polymer.
- the biodegradable polymer is polylactic acid, polylactide, polylactic-co-glycolic acid, polylactide-co-glycolide (PLGA), polyphosphazine, polyiminocarbonate, polyphosphoester, polyanhydride, It is selected from the group consisting of polyorthoesters, polycaprolactones, polyhydroxyvalates, polyhydroxybutyrates, polyamino acids and combinations thereof, preferably polylactide-co-glycolide (PLGA) or polylac Tide, but is not limited to the above examples.
- Microparticles containing leuprolide according to another embodiment of the present invention may have a value of 1 to 15 according to Equation 2 below:
- Microparticles containing leuprolide were administered as an injection to beagle dogs, and the blood concentration of leuprolide was measured.
- Leuprolide acetate administered to the beagle dog by the one injection is 11.25 mg
- C max is the maximum blood concentration of leuprolide for 24 hours after administration of the injection
- C 24h is the blood concentration value of leuprolide in blood collected 24 hours after administration of the injection.
- initial over-release corresponds to an essential factor. That is, when administered as an injection, it was required that the initial release rate of the drug be high so that the blood concentration of leuprolide may be initially high. That is, it is known that in order to exhibit sufficient pharmacological effects as an LHRH agonist, the release rate of the drug must be high at the initial stage of administration. It is currently being manufactured.
- leuprolide not only leuprolide, but most drugs can cause side effects when overexposed. That is, side effects such as nausea, pain around the injection site, headache, dysuria, and joint pain may occur due to excessive release of leuprolide.
- the maximum blood concentration value within 24 hours is lower than that of conventional leuprolide formulations, and the sustained release effect of leuprolide can be exhibited for a long time.
- the value represents a high value of 50 to 60, whereas the microparticles of the present invention In the case of administration, it was confirmed that it is 1 to 15, preferably 2 to 10, and more preferably 3 to 8, showing a large difference.
- the value according to Equation 2 includes the maximum blood concentration value of leuprolide in the numerator, so the value of Equation 2 may increase as the maximum blood concentration value increases, and conversely, when the value of C 24h , which is the denominator, is small, The value of Equation 2 may be large.
- Equation 2 As described above, as the maximum blood concentration value of leuprolide increases, the large value of Equation 2 means that the initial overrelease appears when used as an injection, and the value of C 24h is small, An increase in the value of Equation 2 means that the drug release effect is not shown for a long time.
- Equation 2 when the value of Equation 2 is included within the scope of the present invention, the initial over-release of leuprolide can be prevented, the medicinal effect of leuprolide can be exerted, and when administered as an injection, leuprolide It can be said that the efficacy of the drug can be continuously exerted.
- a method for preparing microparticles containing leuprolide includes: 1) preparing a first mixture by mixing leuprolide and a biodegradable polymer; 2) preparing a second mixture by dissolving a surfactant in a solvent; 3) injecting and flowing the first mixture and the second mixture into the first microchannel and the second microchannel where the intersection points are formed, thereby generating microparticles at the intersection points; 4) collecting the microparticles in a water tank containing the second mixture; 5) removing the organic solvent present in the collected microparticles; and 6) washing and freeze-drying the microparticles from which the organic solvent is removed with purified water, and the value according to Equation 1 below may be 0.5 to 2:
- D10 is the particle diameter corresponding to 10% of the maximum value in the cumulative distribution of particles
- D50 is the particle diameter corresponding to 50% of the maximum value in the cumulative distribution of particles
- D90 is the diameter of a particle corresponding to 90% of the maximum value in the cumulative distribution of particles.
- Step 1) is a step of preparing a first mixture, which is a step of preparing a first mixture by dissolving leuprolide and a biodegradable polymer in an organic solvent, wherein the biodegradable polymer is polylactic acid, polylactide, or polylactic -co-glycolic acid, polylactide-co-glycolide (PLGA), polyphosphazine, polyiminocarbonate, polyphosphoester, polyanhydride, polyorthoester, polycaprolactone, polyhydroxyvalate , polyhydroxybutyrate, polyamino acids, and combinations thereof, preferably polylactide-co-glycolide (PLGA), but is not limited to the above examples.
- the biodegradable polymer is polylactic acid, polylactide, or polylactic -co-glycolic acid, polylactide-co-glycolide (PLGA), polyphosphazine, polyiminocarbonate, polyphosphoester, polyanhydride, polyorth
- the organic solvent is immiscible with water, for example, one or more selected from the group consisting of chloroform, chloroethane, dichloroethane, trichloroethane, and mixtures thereof, preferably dichloromethane, but examples It is not limited to, and is an organic solvent capable of dissolving a biodegradable polymer and leuprolide, and is not limited to the above examples, and any organic solvent that can be easily selected by those skilled in the art will be used.
- Step 1) is to prepare a first mixture in which leuprolide and biodegradable polymer are dissolved, and an organic solvent is used as the solvent as described above. It is completely dissolved using an organic solvent by using the dissolution properties of leuprolide and biodegradable polymer.
- leuprolide acetate is dissolved in a first solvent, and a biodegradable polymer is dissolved in a second solvent. Thereafter, the leuprolide acetate mixture dissolved in the first solvent and the biodegradable polymer mixture dissolved in the second solvent were mixed to prepare a first mixture.
- the first mixture includes leuprolide and a biodegradable polymer in a weight ratio of 1:2 to 1:10. Preferably it is 1:2 to 1:8, and more preferably it may be 1:4 to 1:7.
- the weight ratio of the leuprolide and the biodegradable polymer is less than 1:2, that is, when the biodegradable polymer is less than the weight ratio, the weight ratio of the biodegradable polymer is small compared to the weight of the leuprolide, resulting in a spherical shape.
- sustained-release particles in which leuprolide is evenly distributed in biodegradable polymer particles, and when the weight ratio of biodegradable polymer and leuprolide exceeds 1:10, that is, biodegradation
- the active polymer is included in an amount greater than the above weight ratio, the content of leuprolide in the sustained-release particles is low, so a large amount of sustained-release particles must be administered to administer the drug at a desired concentration.
- the biodegradable polymer in the first mixture contains 15 to 25% by weight, preferably 20% by weight, but is not limited to the above examples.
- Step 2) is a step of preparing a second mixture, and the second mixture is prepared by dissolving a surfactant in water.
- the surfactant may be used without limitation as long as the biodegradable polymer solution can help form a stable emulsion.
- Step 3) is a step of injecting and flowing the first mixture and the second mixture into the microchannel formed on the wafer.
- the microchannels may be formed in a material selected from the group consisting of a silicon wafer or a polymer film, but examples of the material are not limited to the above examples, and any material capable of forming microchannels may be used.
- the polymer film is polyimide, polyethylene, fluorinated ethylene propylene, polypropylene, polyethylene terephthalate, polyethylene naphthalate, polysulfone ( Polysulfone) and mixtures thereof, but is not limited to the above examples.
- aluminum is deposited on a silicon wafer using an e-beam evaporator, and photoresist is patterned on the aluminum using a photolithography technique. Then, aluminum is etched using the photoresist as a mask, after removing the photoresist, silicon is etched with DRIE (deep ion reactive etching) using aluminum as a mask, and after aluminum is removed, glass is anodic bonded on the wafer to seal Thus, the above microchannel is prepared.
- DRIE deep ion reactive etching
- the average diameter of the microchannel is 80 to 120 ⁇ m, preferably 100 ⁇ m, but is not limited to the example.
- the average diameter of the microchannel is 80 ⁇ m or less, there is a possibility of producing sustained-release particles having a diameter of less than 40 ⁇ m, which may affect effective drug release and absorption in vivo.
- the size of the prepared sustained-release particles exceeds 100 ⁇ m, foreign body sensation and pain may increase when administered as an injection, and the particle size distribution of the prepared particles increases, making it difficult to prepare sustained-release particles having a uniform particle size.
- the average diameter of the microchannel may be changed according to the range of injection pressure.
- the average diameter of the microchannel is closely related to the average diameter of the particles, but is also closely related to the injection pressure of the first mixture and the second mixture.
- the cross-sectional width (w) and the cross-sectional height (d) of the microchannel are closely related to the average diameter (d') of the prepared sustained-release particles.
- the width (w) of the microchannel section ranges from 0.7 to 1.3 with respect to the average diameter (d') of the sustained-release particles, and the height (d) of the microchannel section is the average diameter of the sustained-release particles.
- the ratio ranges from 0.7 to 1.3 for (d').
- the width (w) and height (d) of the microchannel section must be set within the range of the ratio of d' to 0.7 to 1.3. , It is possible to manufacture sustained-release particles of a desired size.
- Step 3) is to flow the first mixture and the second mixture into the first microchannel and the second microchannel in which the crossing points are formed under the injection pressure condition.
- the first mixture flows along the first microchannel
- the second mixture flows along the second microchannel formed to form an intersection with the first microchannel, meeting the flow of the first mixture.
- the pressure when the first mixture is injected into the first microchannel, after injection under a pressure condition of 700 to 1,300 mbar, the pressure is raised to a first condition of 10 to 30 mbar/min, and the injection pressure condition is 950 to 950 mbar/min. When reaching 1,500 mbar, the pressure may be increased to a second condition of 2 to 8 mbar/min.
- the second mixture may be injected into the second microchannel under a pressure condition 2 to 4 times greater than the pressure condition when the first mixture is injected into the first microchannel.
- the first mixture is micro It was confirmed that the pressure required to flow the channel at a constant flow rate gradually increased with time.
- the variability of the flow rate is minimized by using a method of constantly increasing the pressure applied to the first mixture, and the first mixture is gradually cured inside the microchannel, thereby preventing non-uniform distribution of microparticles or problems of channel closure, , it is possible to increase the production yield of target microparticles.
- the pressure condition when injecting the first mixture and the second mixture into the microchannel is to adjust the average diameter of the prepared microparticles, and when the above range is not specifically satisfied, the size of the prepared particles Problems may occur that are not uniform, do not satisfy the average diameter range of the microparticles of the present invention, or do not satisfy the value of Equation 1 above.
- the second mixture flows under a higher pressure condition.
- the flow rate of the first mixture and the second mixture are relatively higher at the point where they meet.
- the second mixture having a high flow rate compresses the first mixture, and at this time, the biodegradable polymer and leuprolide in the first mixture generate spherical microparticles due to the repulsive force of the first mixture and the second mixture, More specifically, microparticles are formed in which leuprolide is evenly distributed in a spherical biodegradable polymer.
- Step 4) is the step of collecting the microparticles, which collects the microparticles in the water tank containing the second mixture to prevent aggregation between the initially generated microparticles.
- Step 4) uses the second mixture prepared in step 2), that is, a mixed solution of a surfactant and water. After preparing the second mixture in step 2), a portion is injected into the microchannel, and the other portion is injected into the microchannel. is moved to the water tank in step 4), and is used to prevent aggregation between the collected microparticles.
- Step 5) is a step for removing the organic solvent present in the microparticles collected in the water bath, and the organic solvent present on the surface of the sustained-release particles is evaporated and removed by stirring at a constant temperature condition and stirring speed.
- the stirring conditions are 5-1) primary stirring at a speed of 100 to 300 rpm for 20 to 40 minutes at 15 to 20 ° C; 5-2) secondary stirring at 30 to 40° C. for 60 to 120 minutes at a rate of 100 to 300 rpm; and 5-3) third stirring at a rate of 100 to 300 rpm for 4 to 8 hours at 40 to 45°C.
- the stirring speed is performed by varying the temperature conditions and the stirring time in the first and second stirring steps.
- the temperature conditions are raised and stirred in the second stirring process compared to the first stirring process, and as the temperature is raised step by step, the evaporation rate of the organic solvent present on the surface of the microparticles can be controlled.
- microparticles having a smooth surface can be prepared by gradually evaporating the organic solvent present on the surface of the microparticles.
- the temperature at which the first mixture and the second mixture flow through the microchannel is also 15 to 20°C, preferably 17°C. That is, after flowing through the microchannel and forming an intersection to generate the microparticles, the collected microparticles are constantly maintained at a low temperature of 15 to 20°C until the first stirring. It is possible to manufacture and maintain spherical particles only when the low temperature is maintained during the manufacturing process of the microparticles. That is, in the case of non-low-temperature conditions, it is difficult to manufacture spherical particles.
- the second stirring process and the third stirring process gradually increase the temperature and increase the stirring time so that the organic solvent present on the surface of the microparticles is gradually evaporated, and as the organic solvent evaporates from the surface, the microparticles The effect on the surface of the can be minimized. That is, when the organic solvent is rapidly evaporated, the surface of the microparticles may not be smooth and become rough due to the evaporation of the organic solvent.
- the evaporation rate of the organic solvent can be controlled by gradually increasing the temperature condition and increasing the time for the stirring process as described above. Due to the control of the evaporation rate of the organic solvent, the micro The surface roughness of the particles can be controlled.
- step 6) is a step of washing and drying the microparticles.
- the organic solvents on the surface of the microparticles are washed several times with sterile filtered purified water by stirring to remove the surfactant remaining on the microparticles, then freeze-dried.
- microparticles have a form in which leuprolide is evenly distributed in microparticles made of spherical biodegradable polymers, and include leuprolide and biodegradable polymers in a weight ratio of 1:2 to 1:10.
- the weight ratio of leuprolide and the biodegradable polymer contained in the microparticles is the same as that in the first mixture, which is the same as the weight ratio in the first mixture, as the microparticles are prepared and all organic solvents are removed by evaporation. It is possible to prepare microparticles containing leuprolide and biodegradable polymer in the same ratio as the weight ratio of.
- an injectable composition containing microparticles containing leuprolide includes microparticles containing leuprolide; and a suspending solvent.
- the composition for injection is a form in which microparticles are uniformly contained in a suspended solvent, and when the composition for injection is administered, the microparticles themselves are injected into the body, so that the effect of administration of leuprolide for a long time can be exhibited.
- the effect of releasing leuprolide by decomposition of the biodegradable polymer appears. Since it is in the form, it can show the effect of administration of leuprolide at a constant concentration for a long time.
- a long-acting formulation capable of continuously releasing leuprolide for 1 month a long-acting formulation capable of continuously releasing leuprolide for 3 months, or a 6-month It can be provided as a long-acting formulation that can continuously release leuprolide during a period of time.
- the suspending solvent includes an isotonic agent, a suspending agent and a solvent.
- the tonicity agent is selected from the group consisting of D-Mannitol, Maltitol, Sorbitol, Lactitol, Xylitol, Sodium chloride, and mixtures thereof.
- D-Mannitol Maltitol, Sorbitol, Lactitol, Xylitol, Sodium chloride, and mixtures thereof.
- the suspending agent is sodium carboxymethylcellulose (Soduim Carboxymethylcellulose), polysorbate 80 (Polysorbate 80), starch, starch derivatives, polyhydric alcohols, chitosan, chitosan derivatives, cellulose, cellulose derivatives, collagen (collagen), gelatin, hyaluronic acid (HA), alginic acid, algin, pectin, carrageenan, chondroitin, chondroitin sulfate , dextran, dextran sulfate, polylysine, titin, fibrin, agarose, fluran, xanthan gum and It is selected from the group consisting of mixtures thereof, preferably sodium carboxymethylcellulose and polysorbate 80, but is not limited to the above examples.
- injection water may be used, and all solvents usable as the injection water may be used without limitation.
- An API mixture was prepared by dissolving leuprolide acetate in dimethyl sulfoxide.
- a biodegradable polymer mixture was prepared by dissolving poly(lactide-co-glycolide) (PLGA) in dichloromethane.
- a first mixture was prepared by mixing the API mixture and the biodegradable polymer mixture. At this time, the weight ratio of the leuprolide acetate and the biodegradable polymer in the first mixture is 1:5.
- Polyvinyl alcohol a surfactant, was mixed with water to prepare a second mixture containing 0.5% by weight of polyvinyl alcohol.
- the first mixture and the second mixture were injected into a microchannel formed on a silicon wafer and allowed to flow.
- the first mixture starts with a pressure condition of 1000 mbar and flows under a condition of constantly increasing the pressure at a rising rate of 20 mbar per minute, and then when reaching 1200 mbar per minute It was run under conditions varying with a rise rate of 7 mbar, and the second mixture was run under pressure conditions of 3000 mbar.
- the temperature condition was maintained at 17°C and the stirring speed was 300 rpm.
- Microparticles generated at the junction where the flow of the first mixture and the flow of the second mixture meet were collected in a water tank containing the second mixture.
- the microparticles collected in the water bath were firstly stirred at 17° C. for 30 minutes at a rate of 300 rpm, the temperature was raised to 38° C., and the microparticles collected in the water bath were stirred secondly at a rate of 400 rpm for 1 hour, and then the temperature was raised to 45° C. and thirdly stirred at a rate of 500 rpm for 3 hours.
- microparticles after stirring were washed several times with bacteria-filtered purified water, and freeze-dried to prepare microparticles.
- a biodegradable polymer except that a biodegradable polymer mixture was prepared by dissolving poly(lactide-co-glycolide) (PLGA) and polylactide (PLA) in dichloromethane in a weight ratio of 1.7 to 18.3. Microparticles were prepared in the same manner as in Example 1.
- PLGA poly(lactide-co-glycolide)
- PLA polylactide
- Microparticles were prepared in the same manner as in Preparation Example 1, except that a biodegradable polymer mixture was prepared by dissolving polylactide (PLA) as a biodegradable polymer in dichloromethane.
- PLA polylactide
- microparticles of Preparation Example 1 and the microparticles of Preparation Example 3 were mixed in a weight ratio of 1:3.
- microparticles of Preparation Example 1 and the microparticles of Preparation Example 3 were mixed in a weight ratio of 1:4.
- Microparticles were prepared in the same manner as in Preparation Example 1, except that the weight ratio of leuprolide acetate and the biodegradable polymer in the first mixture was 1:4.
- Microparticles were prepared in the same manner as in Preparation Example 1, except that the weight ratio of leuprolide acetate and the biodegradable polymer in the first mixture was 1:7.
- Microparticles were prepared in the same manner as in Preparation Example 1, except that the weight ratio of leuprolide acetate and the biodegradable polymer in the first mixture was 1:2.
- microparticles were prepared as an injection formulation, and the following suspending solvent was used.
- 3 and 4 are SEM pictures of the leuprin DPS strain of Comparative Example 1, and it can be confirmed that non-uniform particles are mixed.
- the microparticles of the present invention 55.29 ⁇ m to 73.09 ⁇ m (Production Example 1) and 72.26 ⁇ m to 95.78 ⁇ m (Production Example 2), it can be seen that the particle diameter distribution is uniformly distributed.
- the values according to the above formula, Preparation Example 1 and Preparation Example 2 show a value close to 1, whereas Comparative Example 1 has a value greater than 1, and it can be confirmed that the size distribution is not uniform.
- leuprolide formulations were purchased, and the properties of the particles were confirmed by SEM pictures.
- Figure 5 relates to Laurelin Depo Inj (Dongkook Pharmaceutical), and Figure 7 relates to Lupier Depot Inj (Daewoong Pharmaceutical).
- the size of the particles is not uniform and is distributed in various ways, and it can be confirmed that the surface of the particles is not smooth but shows a rough surface state.
- microparticles were a sustained release formulation for 1 month or more, and it was confirmed whether or not the medicinal effect of leuprolide was maintained by continuously releasing leuprolide for 1 month after injection.
- leuprolide acetate administered to rats is 0.1 mg/kg.
- PK values are average PK values for 10 rats.
- leuprolide acetate administered to rats through the microparticles, which are sustained release formulations of the present invention for more than 3 months is adjusted to 0.3 mg / kg. and the experiment was conducted in the same way. The experiment was conducted in the same manner for Comparative Example 1.
- the C max is the maximum blood concentration of leuprolide for 24 hours after administration of the injection
- the C 24h is the blood concentration value of leuprolide in blood collected 24 hours after administration of the injection.
- microparticles of the present invention do not have an initial over-release in both the 1-month dosage form and the 3-month dosage form, and leuprolide is continuously released for 1 month or 3 months.
- Comparative Example 1 has a lot of initial over-release compared to the present invention.
- Comparative Example 1 and Preparation Example 2 of the present invention were administered to beagle dogs, and blood was collected to measure the blood concentration (PK) of leuprolide and the blood concentration (PD) of testosterone.
- the total amount of the injection containing the microparticles of Preparation Example 1 used as a sustained-release formulation for 3 months or more was 92.64mg, and the leuprolide in the injection contained 11.25mg.
- 11.25 mg of Luphrin DPS was administered to beagle dogs.
- Preparation Example 1 and Comparative Example 1 were administered to 5 beagle dogs each, and an intravenous injection method was used as the administration route.
- the C max is the maximum blood concentration of leuprolide for 24 hours after administration of the injection
- the C 24h is the blood concentration value of leuprolide in blood collected 24 hours after administration of the injection.
- the PK measurement result of the injection containing the microparticles of the present invention showed that the maximum blood concentration of leuprolide for 24 hours after administration of the injection was 0.407ng/ml, and Comparative Example 1 was 98.570ng/ml. It was confirmed that it showed a big difference. Accordingly, the value according to the above formula was confirmed to be 3.42 in the present invention, and 52.68 in Comparative Example 1, indicating a large difference.
- FIG. 9 is a comparison result for confirming the PD value after administration of Preparation Example 2 and Comparative Example 1. It can be confirmed that the appearance, it can be confirmed that the effect is expressed by leuprolide. On the other hand, in the case of Comparative Example 1, as a result of checking the blood testosterone level for 14 weeks, it was confirmed to be 0.5ng/ml or more, and it could be confirmed that the effect of leuprolide was not shown.
- the present invention relates to microparticles containing leuprolide and a method for preparing the same.
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Abstract
Description
구분 | 루프린DPS주(한국다케다제약) |
류프로라이드 아세테이트 | 11.25 |
PLA | 99.30 |
D-mannitol | 19.45 |
총량(mg) | 130.00 |
API : Polymer ratio | 1 : 8.827 |
함량기준 | 배합목적 | 성분명 | 분량 | 단위 |
2.0 mL | 등장화제 | D-만니톨 (D-Mannitol) |
100.0 | Mg |
현탁화제 | 카르복시메틸셀룰로오스나트륨 (Soduim Carboxymethylcellulose) |
10.0 | mg | |
현탁화제 | 폴리소르베이트80(Polysorbate 80) | 10.0 | mg | |
용제 | 주사용수(Injection water) | 나머지 |
제조예 1 | 제조예 2 | 비교예 1 | |||
%Tile | Size(㎛) | %Tile | Size(㎛) | %Tile | Size(㎛) |
10.00 | 55.29 | 10.00 | 72.26 | 10.00 | 5.88 |
20.00 | 57.56 | 20.00 | 75.28 | 20.00 | 9.23 |
30.00 | 59.57 | 30.00 | 77.38 | 30.00 | 12.20 |
40.00 | 61.46 | 40.00 | 79.18 | 40.00 | 15.71 |
50.00 | 63.29 | 50.00 | 80.99 | 50.00 | 19.21 |
60.00 | 65.10 | 60.00 | 82.85 | 60.00 | 23.67 |
70.00 | 66.98 | 70.00 | 84.84 | 70.00 | 28.88 |
80.00 | 69.06 | 80.00 | 87.23 | 80.00 | 35.15 |
90.00 | 71.49 | 90.00 | 91.49 | 90.00 | 44.08 |
95.00 | 73.09 | 95.00 | 95.78 | 95.00 | 52.07 |
1.025 | 1.20 | 1.87 |
Time | TIME (hr) | PK |
제조예 1 | ||
-24 | 0 | |
-18 | 0 | |
-12 | 0 | |
-6 | 0 | |
0 | 0 | |
0.5 | 4.12 | |
1 | 13.32 | |
3 | 13.13 | |
6 | 8.76 | |
1d | 24 | 4.78 |
2d | 48 | 1.92 |
3d | 72 | 1.17 |
4d | 96 | 0.86 |
1w | 168 | 1.61 |
2w | 336 | 2.09 |
3w | 504 | 1.86 |
4w | 672 | 1.68 |
5w | 840 | 2.20 |
2.79 |
Day | PK | |
d | 제조예 2 | 비교예 1 |
-1 | 0 | 0 |
-0.75 | 0 | 0 |
-0.5 | 0 | 0 |
-0.25 | 0 | 0 |
0 | 0 | 0 |
0.01 | 346.813 | 4803.779 |
0.02 | 460.551 | 6660.572 |
0.04 | 486.102 | 7475.354 |
0.08 | 273.596 | 7589.883 |
0.13 | 128.908 | 5184.862 |
0.25 | 66.350 | 1287.771 |
0.5 | 148.698 | 643.497 |
1 | 87.603 | 401.335 |
2 | 55.667 | 44.172 |
3 | 35.895 | 22.934 |
4 | 34.396 | 21.015 |
7 | 21.016 | 10.414 |
14 | 6.501 | 14.327 |
21 | 5.358 | 16.114 |
28 | 5.993 | 17.985 |
42 | 23.749 | 22.018 |
56 | 93.315 | 28.323 |
84 | 54.991 | 30.565 |
91 | 26.798 | 19.457 |
5.55 | 18.91 |
Time (w) |
Time (d, w) |
Time (h) | PK | PD | ||
제조예 2 | 비교예 1 | 제조예 2 | 비교예 2 | |||
-0.143 | -24 | 0 | 0 | 1.014 | 1.378 | |
-0.107 | -18 | 0 | 0 | 1.119 | 1.569 | |
-0.071 | -12 | 0 | 0 | 2.450 | 2.924 | |
-0.036 | -6 | 0 | 0 | 0.950 | 1.462 | |
0.000 | 0 | 0 | 0 | 0.913 | 3.017 | |
0.001 | 0.25 | 0.065 | 23.476 | 1.167 | 1.904 | |
0.003 | 0.5 | 0.205 | 43.535 | 2.252 | 4.078 | |
0.006 | 1 | 0.351 | 98.570 | 4.454 | 5.043 | |
0.012 | 2 | 0.407 | 83.505 | 4.972 | 6.029 | |
0.018 | 3 | 0.365 | 61.216 | 5.406 | 6.271 | |
0.036 | 6 | 0.187 | 16.511 | 4.752 | 6.119 | |
0.071 | 12 | 0.081 | 3.017 | 3.383 | 4.940 | |
0.143 | 1d | 24 | 0.119 | 1.871 | 3.257 | 5.212 |
0.286 | 2d | 48 | 0.106 | 1.249 | 2.742 | 4.702 |
0.429 | 3d | 72 | 0.079 | 1.099 | 2.451 | 7.203 |
0.571 | 4d | 96 | 0.087 | 0.994 | 1.026 | 3.381 |
1 | 1w | 168 | 0.050 | 1.277 | 0.666 | 1.626 |
2 | 2w | 336 | 0.027 | 0.491 | 1.356 | 0.517 |
3 | 3w | 504 | 0.067 | 0.088 | 1.454 | 1.500 |
4 | 4w | 672 | 1.032 | 0.102 | 0.574 | 1.187 |
6 | 6w | 1008 | 0.953 | 0.086 | 0.005 | 1.035 |
8 | 8w | 1344 | 0.930 | 0.121 | 0 | 0.929 |
12 | 12w | 2016 | 0.958 | 0.133 | 0 | 0.799 |
13 | 13w | 2184 | 1.353 | 0.095 | 0 | 0.743 |
14 | 14w | 2352 | 0.941 | 0.092 | 0 | 1.143 |
3.42 | 52.68 | - | - |
Claims (8)
- 제1항에 있어서,상기 류프로라이드 및 생분해성 고분자는 1:2 내지 1:10의 중량 비율로 포함하는류프로라이드를 포함하는 마이크로 입자.
- 제1항에 있어서,주사제로 투여 시, 표적 부위에서 류프로라이드의 방출 속도가 조절되어, 초기 과방출의 문제가 없고,상기 류프로라이드에 의해 테스토스테론의 억제 효과가 1개월 이상 지속되는류프로라이드를 포함하는 마이크로 입자.
- 1) 류프로라이드 및 생분해성 고분자를 혼합하여 제1 혼합물을 제조하는 단계;2) 용매에 계면활성제를 용해하여 제2 혼합물을 제조하는 단계;3) 상기 제1 혼합물 및 제2 혼합물은 교차점이 형성된 제1 마이크로 채널 및 제2 마이크로 채널에 각 주입하여 흐르게 하여 상기 교차점에서 마이크로 입자를 생성하는 단계;4) 상기 마이크로 입자를 상기 제2 혼합물이 담긴 수조 내에 수집하는 단계;5) 상기 수집한 마이크로 입자에 존재하는 유기 용매를 제거하는 단계; 및6) 상기 유기 용매가 제거된 마이크로 입자를 정제수로 세척 및 동결 건조하는 단계를 포함하며,하기 식 1에 의한 값이 0.5 내지 2인류프로라이드를 포함하는 마이크로 입자의 제조 방법:[식 1]여기서,D10은 입자의 누적분포에서 최대값에 대하여 10%에 해당하는 입자의 직경이며,D50은 입자의 누적분포에서 최대값에 대하여 50%에 해당하는 입자의 직경이며,D90은 입자의 누적분포에서 최대값에 대하여 90%에 해당하는 입자의 직경이다.
- 제5항에 있어서,상기 제1 혼합물을 제1 마이크로 채널에 주입 시, 700 내지 1,300mbar의 압력 조건으로 주입 후, 10 내지 30mbar/min의 제1 조건으로 압력을 상승시키고,상기 주입 압력 조건이 950 내지 1,500mbar에 도달 시, 2 내지 8mbar/min의 제2 조건으로 압력을 상승시키는류프로라이드를 포함하는 마이크로 입자의 제조 방법.
- 제5항에 있어서,상기 제2 혼합물은 상기 제1 혼합물을 제1 마이크로 채널의 주입할 때, 압력 조건 대비 2 내지 4배의 압력 조건으로 제2 마이크로 채널로 주입되는류프로라이드를 포함하는 마이크로 입자의 제조 방법.
- 제5항에 있어서,상기 5) 단계는,5-1) 15 내지 20℃에서 20 내지 40분 동안 100 내지 300rpm의 속도로 1차 교반하는 단계;5-2) 30내지 40℃에서 60 내지 120 분 동안 100 내지 300rpm의 속도로 2차 교반하는 단계; 및5-3) 40 내지 45℃에서 4 내지 8시간 동안 100 내지 300rpm의 속도로 3차 교반하는 것인류프로라이드를 포함하는 마이크로 입자의 제조 방법.
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