WO2005074896A1 - 徐放性製剤 - Google Patents
徐放性製剤 Download PDFInfo
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- WO2005074896A1 WO2005074896A1 PCT/JP2005/001922 JP2005001922W WO2005074896A1 WO 2005074896 A1 WO2005074896 A1 WO 2005074896A1 JP 2005001922 W JP2005001922 W JP 2005001922W WO 2005074896 A1 WO2005074896 A1 WO 2005074896A1
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- salt
- release
- microcapsules
- sustained
- gnrh agonist
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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
-
- 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
- A61K9/5005—Wall or coating material
- A61K9/5021—Organic macromolecular compounds
- A61K9/5031—Organic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poly(lactide-co-glycolide)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/17—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- A61K38/22—Hormones
- A61K38/24—Follicle-stimulating hormone [FSH]; Chorionic gonadotropins, e.g. HCG; Luteinising hormone [LH]; Thyroid-stimulating hormone [TSH]
-
- 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
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/34—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyesters, polyamino acids, polysiloxanes, polyphosphazines, copolymers of polyalkylene glycol or poloxamers
-
- 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
-
- 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
- A61K9/5089—Processes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P13/00—Drugs for disorders of the urinary system
- A61P13/08—Drugs for disorders of the urinary system of the prostate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P15/00—Drugs for genital or sexual disorders; Contraceptives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P15/00—Drugs for genital or sexual disorders; Contraceptives
- A61P15/08—Drugs for genital or sexual disorders; Contraceptives for gonadal disorders or for enhancing fertility, e.g. inducers of ovulation or of spermatogenesis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P15/00—Drugs for genital or sexual disorders; Contraceptives
- A61P15/18—Feminine contraceptives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P5/00—Drugs for disorders of the endocrine system
- A61P5/02—Drugs for disorders of the endocrine system of the hypothalamic hormones, e.g. TRH, GnRH, CRH, GRH, somatostatin
Definitions
- the present invention provides a novel sustained-release preparation comprising a combination of a microcapsule that releases GnRH agonist or a salt thereof for a long period of time and a microcapsule that releases GnRH agonist or a salt thereof for a short period of time. About.
- Luteinizing hormone-releasing hormone known as GnRH (or LHRH)
- GnRH Luteinizing hormone-releasing hormone
- LH luteinizing hormone
- FSH follicle-stimulating hormone
- sustained-release preparations containing these are sold as therapeutic agents for the above-mentioned diseases and the like.
- Formulations containing these compounds were initially used as a once-daily formulation, but have since been formulated as a sustained release formulation and are currently being sold as one-, three-, or four-month sustained-release formulations.
- their sustained-release preparations are disclosed in Patent Documents 1 and 2.
- compounds having a GnRH action are widely used as therapeutics for prostate cancer and the like.
- prolonging the sustained release period in the preparation improves the therapeutic effect and It is considered to be favorable in terms of healthcare economy because it can reduce the number of hospital visits that can be achieved only by improving the quality of life (quality of life) of patients.
- Patent Document 1 EP190833
- Patent Document 2 EP442671
- the inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, surprisingly, the combined release of GnRH agonist sustained-release preparations having different sustained release periods resulted in an increase in the amount of release at the initial administration. It has been found that stable sustained release over a long period can be ensured. The present inventors have further studied based on these findings and completed the present invention. That is, the present invention
- a sustained-release preparation comprising a combination of microcapsules that slowly release GnRH agonist or a salt thereof for a long term and microcapsules that slowly release GnRH agonist or a salt thereof for a short time;
- Y represents a residue selected from DLeu, DAla, DTrp, DSer (tBu), D2Nal and DHis (ImBzl), and Z represents NH-CH or Gly-NH, respectively.
- microcapsules are based on a lactic acid polymer or a lactic acid-glycolic acid polymer.
- microcapsule containing (i) a GnRH agonist or a salt thereof and (ii) a lactic acid polymer having a weight average molecular weight of about 18,000 to about 30,000,
- a micron comprising: a GnRH agonist or a salt thereof; and (ii) a lactic acid polymer having a weight average molecular weight of 5,000 or less and a polymer content of about 5% by weight or less and a weight average molecular weight of about 15,000 to about 50,000.
- a micron comprising: a GnRH agonist or a salt thereof; and (ii) a lactic acid polymer having a weight average molecular weight of 5,000 or less and a polymer content of about 5% by weight or less and a weight average molecular weight of about 15,000 to about 50,000.
- composition ratio of the internal aqueous phase solution containing about 20-70% by weight of GnRH agost or its salt to the lactic acid Z glycolic acid is 80Z20-100Z0 and the weight average molecular weight is about 7,000- It is prepared by microencapsulation of a WZO emulsion prepared from an oil phase liquid containing a copolymer and a homopolymer as a release controlling substance of about 30,000, and is prepared for more than two months. -Microcapsules for zero-order release of strike or its salt The preparation according to the above [1], wherein the preparation is
- prostate cancer prostatic hyperplasia, endometriosis, uterine fibroids, uterine fibroma, precocious puberty, which comprises administering to a mammal an effective amount of the sustained-release preparation according to claim 1.
- Claim 1 for producing a therapeutic or contraceptive agent for the prevention of prostate cancer, prostatic hypertrophy, endometriosis, uterine fibroids, uterine fibroids, precocious puberty, dysmenorrhea or breast cancer. And the use of sustained-release preparations.
- GnRH agonists include hormone-dependent diseases, especially sex hormone-dependent cancers (eg, prostate cancer, uterine cancer, breast cancer, pituitary tumor, etc.), prostatic hypertrophy, endometriosis, uterine fibroids, Precocious puberty, dysmenorrhea, amenorrhea, premenstrual syndrome, multiple ovarian syndrome, postoperative recurrence of the cancer, dwarfism, Alzheimer's disease, menopause, indeterminate complaints, metastasis of the cancer, calcium GnRH agonists effective for sex hormone-dependent diseases such as bone metabolism disorders and contraception (or infertility if the rebound effect after withdrawal is used) Is mentioned.
- GnRH agonists that are effective for benign or malignant tumors that are sex hormone-independent but sensitive to GnRH are also included.
- GnRH agonist examples include, for example, Treatment with GnRH analogs: Treatment with GnRH analogs:
- a salt thereof particularly an acetate thereof (leuprorelin acetate: manufactured by Takeda Pharmaceutical Co., Ltd.) and the like are suitable.
- the peptide exemplified as the GnRH agonist may be a pharmacologically acceptable salt.
- Such salts include, when the peptide has a basic group such as an amino group, an inorganic acid (eg, hydrochloric acid, sulfuric acid, nitric acid, boric acid, etc.), an organic acid (eg, carbonic acid, bicarbonate, succinic acid, Acetic acid, propionic acid, trifluoroacetic acid and the like).
- the peptide When the peptide has an acidic group such as a carboxyl group, an inorganic base (eg, an alkali metal such as sodium or potassium, an alkaline earth metal such as calcium or magnesium) or an organic base (eg, an organic amine such as triethylamine, Salts with basic amino acids such as arginine). Further, the peptide may form a metal complex conjugate (eg, a copper complex, a zinc complex, etc.).
- an inorganic base eg, an alkali metal such as sodium or potassium, an alkaline earth metal such as calcium or magnesium
- an organic base eg, an organic amine such as triethylamine, Salts with basic amino acids such as arginine
- the peptide may form a metal complex conjugate (eg, a copper complex, a zinc complex, etc.).
- peptides or salts thereof can be produced by the method described in the above-mentioned literature or gazette or a method analogous thereto.
- leuprorelin acetate As a GnRH agonist, other than the above leuprorelin (leuprorelin acetate) is preferred. As a specific example, for example,
- Microcapsules that release GnRH agonists or their salts in a short period of time include GnRH agonists or their salts within a period of less than 5 months.
- Microcapsules for sustained release of the drug are preferably used for a period of about 1 week or more and less than about 5 months, more preferably for about 2 weeks or more and about 4 months or less, and still more preferably for about 3 weeks or more.
- a microcapsule that releases GnRH agonist or a salt thereof within a period of about 1 month or, most preferably, about 1 month or about 3 months is used.
- GnRH agonist or its salt within 5 months or more
- Microcapsules that release sustainedly are preferably used for a period of 5 months or more and less than 2 years, more preferably for a period of 5 months or more and 1 year and 6 months or less, and more preferably for 5 months or more and 1 year or less.
- GnRH agonist or salt thereof within a period of time, even more preferably within a period of 5 months to August, particularly preferably within a period of 5 months to June, most preferably within a period of about 6 months.
- Microcapsules that release slowly are used.
- each of the aforementioned microcapsules that slowly releases GnRH agonist or its salt in a short term and microcapsules that slowly releases GnRH agonist or its salt in a long term Microcapsules having a release period can be used in appropriate combination.
- sustained release microcapsules described in EP190833 or EP442671 and sustained release microcapsules described in EP442671 and (ii) sustained release microcapsules described in WOO 3/002092 Can be used in combination.
- “used in combination” refers to a preparation containing short-term sustained-release microcapsules (hereinafter sometimes simply referred to as “short-term sustained-release preparation”) and a preparation containing long-term sustained-release microcapsules (hereinafter, referred to as “short-term sustained-release preparation”).
- the “long-term sustained-release formulation” may be administered sequentially, and the short-term sustained-release formulation and the long-term sustained-release formulation may be administered simultaneously after mixing (in this case, short-term sustained-release formulation). Includes formulation after mixing microcapsules with long-term sustained release microcapsules
- the term refers to administration in which the sustained release period of the drug in the short-term sustained release formulation and the long-term sustained release product formulation overlap, and the administration of another formulation after the sustained release period of the drug in one formulation elapses Is not included in the combination here! / ⁇ .
- a 1-month sustained-release formulation is used in combination with a 3-month sustained-release formulation, this includes cases in which a 3-month sustained-release formulation is administered 1 month after administration of the 1-month sustained-release formulation. Absent.
- the ratio of the combination of the short-term sustained-release preparation and the long-term sustained-release preparation is usually the short-term sustained-release preparation 1 to 40, preferably the short-term sustained-release preparation 1 as the weight ratio of GnRH agonist, To long-term sustained release formulation 5-20, more preferably to short-term sustained release formulation 1 to long-term sustained release formulation 7-18 (especially 9-116), and more preferably to short-term sustained release formulation 1.
- the long-term sustained-release preparation is 7-15, and more preferably, the short-term sustained-release preparation is 9-12 relative to the short-term sustained-release preparation 1.
- the term ⁇ short term sustained release formulation '' should be read as ⁇ short term sustained release microcapsule '', ⁇ long term sustained release formulation '' and ⁇ long term sustained release microcapsule ''.
- the combination ratio can be determined.) 0
- the sustained-release preparation of the present invention comprising a combination of a long-term sustained-release microcapsule and a short-term sustained-release microcapsule can sustainably release GnRH agonist or a salt thereof for a long period of time.
- the term “long term” means, for example, a period of 5 months or more, preferably a period of 5 months or more and less than 2 years, More preferably, a period of 5 months to 1 year and 6 months, still more preferably a period of 5 months to 1 year, even more preferably a period of 5 months to 8 months, particularly preferably a period of 5 months to 6 months , Most preferably a period of about 6 months.
- leuprorelin or a salt thereof a salt thereof (hereinafter sometimes simply referred to as “leuprorelin or a salt thereof”), more preferably leuprorelin acetate, as a sustained release microcapsule, more preferably a sustained release microcapsule. It is administered as an injection.
- Leuprorelin or a salt thereof, more preferably leuprorelin acetate is generally recognized along with known physiologically acceptable carriers, flavors, excipients, vehicles, preservatives, stabilizers, binders, etc.
- the above-mentioned preparations can be produced by mixing them in the unit dosage form required for the preparation of the preparations.
- an aqueous solution for injection for example, physiological saline, isotonic solution containing glucose and other adjuvants (eg, D-sorbitol, D-mantol, sodium salt, etc.) and the like are used.
- solubilizers such as alcohols (eg, ethanol), polyalcohols (eg, propylene glycol, polyethylene glycol), nonionic surfactants (eg, polysorbate 80 (TM), HCO-50) May be.
- alcohols eg, ethanol
- polyalcohols eg, propylene glycol, polyethylene glycol
- nonionic surfactants eg, polysorbate 80 (TM), HCO-50
- oily liquid for example, sesame oil, soybean oil and the like are used, and may be used in combination with solubilizers such as benzyl benzoate and benzyl alcohol.
- the above-mentioned preparations include, for example, a buffer (eg, phosphate buffer, sodium acetate buffer), a soothing agent (eg, benzalcodium chloride, proforce hydrochloride, etc.), a stabilizer (eg, , Human serum albumin, polyethylene glycol, etc.), preservatives (eg, benzyl alcohol, phenol, etc.), antioxidants and the like.
- a buffer eg, phosphate buffer, sodium acetate buffer
- a soothing agent eg, benzalcodium chloride, proforce hydrochloride, etc.
- a stabilizer eg, Human serum albumin, polyethylene glycol, etc.
- preservatives eg, benzyl alcohol, phenol, etc.
- antioxidants eg, benzyl alcohol, phenol, etc.
- sustained-release preparation particularly, sustained-release microcapsules
- GnRH agonist preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate
- Method for example, in the case of a short-term sustained-release preparation (or short-term sustained-release microforce capsule), in the case of a long-term sustained-release preparation (or long-term sustained-release microcapsule) according to the method described in EP190833, EP442671, WO03Z002091, etc.
- WO03Z00 It can be produced according to the method described in 2092 and the like.
- the preparation of the present invention can be produced by mixing microcapsules that slowly release GnRH agonist or a salt thereof for a long period of time and microcapsules that slowly release GnRH agonist or a salt thereof for a short period of time.
- a sustained-release preparation comprising a combination of a microcapsule that slowly releases GnRH agonist or a salt thereof and a microcapsule that slowly releases GnRH agonist or a salt thereof in a short period of time, which is useful in the present invention
- Microcapsules that slowly release GnRH agonist or its salt for a long period of time and microcapsules that release GnRH agonist or its salt for a short period of time are separately manufactured and mixed at an appropriate mixing ratio as appropriate. It can be manufactured by converting The mixing of the long-term sustained-release microcapsules and the short-term sustained-release microforce capsule may be before or after the later-described primary drying step and secondary drying step.
- microcapsules that slowly release GnRH agonist or its salt in the long term and microcapsules that release GnRH agonist or its salt in the short term.
- microcapsules that release GnRH agonist or its salt in the short term can be used after being formulated as a preparation for administration.
- two sustained-release preparations each consisting of short-term or long-term sustained-release microforces, such as Psercar®, may be mixed and administered at the time of use.
- GnRH agonist preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate
- WZW water
- WZW preferably 25-65%
- WZW preferably 35-60%
- a drug-retaining substance such as gelatin or a basic amino acid is dissolved or suspended to prepare an internal aqueous phase solution.
- GnRH agonist preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate
- GnRH agonist is used as a pH adjuster for maintaining the stability and solubility.
- Carbonic acid, acetic acid, oxalic acid, citric acid, phosphoric acid, hydrochloric acid, sodium hydroxide, arginine, lysine and salts thereof may be added.
- GnRH agonist preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate
- albumin preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate
- citric acid sodium ethylenediaminetetraacetate
- dextrin sodium bisulfite And polyol compounds
- polyol compounds such as polyethylene glycol.
- commonly used paraoxybenzoic acid esters eg, methylparaben, propynoleparaben
- benzinoleanolone chlorobutanooneole, thimerosanole and the like
- the inner aqueous phase liquid thus obtained is added to a solution (oil phase) containing a high molecular weight polymer (polymer), and then an emulsification operation is performed to produce a wZo type emulsion.
- a known dispersion method is used, for example, a method using an intermittent shaking method, a method using a mixer such as a propeller-type stirrer or a turbine-type stirrer, a colloid mill method, a homogenizer method, and ultrasonic irradiation. Law and the like.
- the WZO-type emulsion thus prepared is subjected to a microencapsulation step, and as this step, an underwater drying method or a phase separation method can be applied.
- the WZO emulsion is further added to the third aqueous phase to form a wZoZw type three-phase emulsion, and then the solvent in the oil phase is evaporated to obtain microcapsules.
- an emulsifier may be added to the aqueous phase of the above external phase, any one may be used as long as it generally forms a stable oZw type emulsion.
- an e-one surfactant sodium oleate, Sodium stearate, sodium lauryl sulfate, etc.
- nonionic surfactants polyoxyethylene sorbitan fatty acid esters [Tween 80, Tween 60, Atlas Powder Co., Ltd.]
- polyoxyethylene castor oil derivatives [HCO-60, HC 0-50 , Nikko Chemical]
- polyvinylpyrrolidone polyvinyl alcohol, carboxymethylcellulose, lecithin, gelatin, and the like, and one or a combination of these may be used.
- the concentration at the time of use can be suitably selected from a range of about 0.01% to 20%, and more preferably, a range of about 0.05% to 10%.
- a commonly used method is used for evaporating the solvent in the oil phase.
- the method is carried out by gradually reducing the pressure while stirring with a propeller-type stirrer or a magnetic stirrer, or by adjusting the degree of vacuum using a rotary evaporator or the like.
- the time required can be shortened by gradually heating the WZOZW type emulsion to complete the desorption of the solvent. It comes out.
- the microcapsules thus obtained are separated by centrifugation or filtration, and then the free GnRH agonist (preferably leuprorelin or a salt thereof, adhering to the surface of the microcapsules, More preferably, leuprorelin acetate, a drug-retaining substance, an emulsifier, etc. are repeatedly washed with distilled water several times, then dispersed again in distilled water or the like, and freeze-dried. At this time, a coagulation inhibitor such as sugar may be added. Heat, if necessary, and remove water and organic solvent from the microcapsules more completely under reduced pressure.
- the free GnRH agonist preferably leuprorelin or a salt thereof, adhering to the surface of the microcapsules, More preferably, leuprorelin acetate, a drug-retaining substance, an emulsifier, etc.
- a coagulation inhibitor such as sugar may be added. Heat, if necessary, and remove water and organic solvent from the microcapsules more
- lyophilization specifically, about 2 to about 60% by weight of sugar is added to the microcapsules thus obtained, based on the microcapsule, and lyophilized. This step is called the primary drying step.
- the polymer is appropriately heated in a temperature range of about 40 ° C. higher than the glass transition temperature of the polymer. This step is called a secondary drying step.
- sugar used examples include D-mantol, sodium alginate, fructose, dextran, dextrin, sucrose, D-sorbitol, ratatose, glucose, maltose, starches, and trehalose. These sugars may be used alone or in an appropriate mixture. Among these, D-mantle, which is easy to freeze-dry and has low toxicity, is particularly preferred.
- the method of adding the sugar is not particularly limited, and examples thereof include a method of well dispersing the microcapsules in an aqueous solution of sugar, a method of simply adding the sugar to the microcapsules, and mixing using a mixer or the like.
- the amount of sugar added is preferably about 5 to about 40% by weight, based on the microforce.
- microcapsules are already mixed with sugar, for example, when sugar is used during or before drying in water or spray-drying, and when it is mixed, the total amount should be taken into account in consideration of the amount. What is necessary is just to add so that it may be in the said range.
- Freeze-drying may be performed according to a known method.
- the heating temperature in the secondary drying step is preferably in a range of about 20 ° C higher than the glass transition temperature of the polymer.
- the heating temperature is usually selected so that the product temperature is in the temperature range of about 30 to about 60 ° C.
- the glass transition temperature means a midpoint glass transition temperature obtained when a heating rate is increased at 10 or 20 ° C./min using a differential scanning calorimeter (DSC).
- the heating time in the secondary drying step is not particularly limited, but is usually about 1 hour to about 240 hours, preferably about 10 hours to about 120 hours, and more preferably about 20 hours to about 72 hours.
- the heating temperature, heating time, degree of drying, and heating method depend on the particle size, stability, glass transition temperature, melting point, fusion, deformation of the microcapsules, stability of the drug contained therein, and It is determined by the type and amount of sugar and the degree of dispersibility of the microcapsules. By heating as described above, the water and the organic solvent in the microcapsules can be more completely removed.
- a coacervation agent is gradually added to the WZO emulsion under stirring to precipitate and solidify a polymer.
- a high molecular weight compound a mineral oil type or a vegetable oil type compound which is miscible with the solvent of the high molecular weight polymer and which does not dissolve the encapsulating polymer may be used.
- microcapsules thus obtained are collected by filtration and then washed repeatedly with heptane or the like to remove the coacervation agent.
- removal of free drug and elimination of solvent are carried out in the same manner as in the underwater drying method.
- An anti-agglomeration agent may be added to prevent agglomeration of particles during washing.
- the microcapsules obtained above are lightly pulverized if necessary, and then sieved to remove microcapsules that are too large.
- the average particle diameter of the microcapsules is in the range of about 0.5-1000 ⁇ m, and more preferably in the range of about 2-500 ⁇ m.
- the distance be within a range that satisfies the dispersibility and needle penetration property, for example, the range of about 2 to about 100 m.
- Examples of the high molecular weight polymer include biodegradable polymers, for example, ⁇ -hydroxymonocarboxylic acids (eg, glycolic acid, lactic acid, etc.), ⁇ -hydroxydicarboxylic acids (eg, malic acid), a- Poly ( ⁇ -cyanoacrylate) synthesized from one or more ⁇ -hydroxycarboxylic acids such as hydroxytricarboxylic acid (eg, citric acid) and having a free carboxyl group, or a mixture thereof; A polyamino acid (eg, poly ( ⁇ -benzylyl) L-glutamic acid) and the like; maleic anhydride copolymers (eg, styrene-maleic acid copolymer and the like) and the like are used.
- biodegradable polymers for example, ⁇ -hydroxymonocarboxylic acids (eg, glycolic acid, lactic acid, etc.), ⁇ -hydroxydicarboxylic acids (eg, malic acid), a- Poly (
- the bonding mode of the monomer may be any of random, block, and graft.
- any of DLDL-forms may be used.
- lactic acid-glycolic acid polymer hereinafter referred to as poly (lactide CO-glycolide), poly (lactic co-glycolic acid) or lactic acid-glycolic acid copolymer is also referred to.
- homopolymer (polymer) and copolymer (copolymer) are collectively referred to as lactic acid homopolymer and lactic acid polymer and polylactic acid.
- glycolic acid homopolymers are sometimes referred to as glycolic acid polymers, polyglycolic acid, polyglycolide, etc.), and poly ( ⁇ -cyanoacrylate). More preferably, it is a lactic acid-glycolic acid polymer, more preferably, a lactic acid-glycolic acid polymer having a free carboxyl group at a terminal.
- the biodegradable polymer may be a salt.
- Salts include, for example, inorganic bases (eg, alkali metals such as sodium and potassium, alkaline earth metals such as calcium and magnesium) and organic bases (eg, organic amines such as triethylamine, and basic amino acids such as arginine). And salts with transition metals (eg, zinc, iron, copper, etc.) and complex salts.
- lactic acid over glycolic acid polymer When using lactic acid over glycolic acid polymer as a biodegradable polymer, its composition ratio (Monore 0/0) is about 100Z0- about 40 ⁇ 60 force preferably about 100Z0- not preferable from about 50 ⁇ 50 force. Further, in the case of a sustained-release micro force cell that releases the GnRH agonist in the zero-order for two or more months, a lactic acid homopolymer (lactic acid polymer) having a composition ratio of 100Z0 is also preferably used.
- the ratio of the optical isomer of lactic acid which is one of the minimum repeating units of the “lactic acid-glycolic acid polymer”, is preferably such that the D-form, ZL-form (mol / mol. / ⁇ ) is in the range of about 75 ⁇ 25 to about 25 ⁇ 75. Good.
- the D-form ZL-form (mol / mol 0 / ⁇ ) those having a range of about 60 ⁇ 40 to about 30 ⁇ 70 are widely used.
- the weight average molecular weight of the “lactic acid-glycolic acid polymer” or “lactic acid polymer” is usually About 3,000—about 100,000, preferred ⁇ about 3,000—about 60,000, more preferred ⁇ about about 3,000—about 50,000 power!
- a lactic acid-glycolic acid polymer (75Z25 (mol%)) having a weight average molecular weight of 8,000 to 12,000 or a weight average molecular weight of 13,000 to 18, 000 lactic acid polymer and a lactic acid polymer having a weight-average molecular weight of 18,000-30,000 as a base for long-term sustained-release microcapsules can be combined.
- the dispersity (weight average molecular weight, Z number average molecular weight) is usually preferably about 1.2 to about 4.0, more preferably about 1.5 to about 3.5.
- the amount of free carboxyl groups of the “lactic acid-glycolic acid polymer” or “lactic acid polymer” is usually preferably about 20 to about 1000 ⁇ mol (micromol) per unit mass (gram) of the polymer, and more preferably about 20 to about 1000 ⁇ mol (micromol). 40—about 1000 ⁇ mol (micromol) is particularly preferred.
- weight average molecular weight, number average molecular weight and dispersity refer to the molecular weight in terms of polystyrene measured by gel permeation chromatography (GPC) using polystyrene having a known molecular weight as a standard substance and the calculated dispersity.
- Examples of the standard substance include the following combinations.
- the measurement was performed using a GPC device (manufactured by Tosoichi, HLC-8120GPC, the detector was measured by a differential refractometer), a GPC column (manufactured by Tosoichi, TSK gel G4000H)
- TSK gel G1000H are connected in order from the sample inlet to the exclusion limit! /)
- vZv 4Z96
- the reaction solution is diluted with a 1.5N sodium hydroxide aqueous solution to make YmL, and the absorbance A (Zcm) at 544 nm is measured for the 1.5N sodium hydroxide aqueous solution.
- the amount of free carboxyl groups CmolZL is determined by alkali titration, and when the absorbance at 544 nm when DL lactic acid hydrazide in the ONPH labeling method is defined as B (/ cm),
- B (/ cm) The molar amount of free carboxyl groups per unit mass (gram) of the coalescence is determined by the following formula.
- the "carboxyl group content” is determined by dissolving the biodegradable polymer in a mixed solvent of toluene, acetone and methanol, and titrating the solution with phenolphthalein as an indicator and titrating the solution with an alcoholic potassium hydroxide solution. (Hereinafter, the value obtained by this method is referred to as “the amount of carboxyl groups by the alkali titration method.”)
- the end point of the titration may be unclear as a result of competing hydrolysis reactions of the polyester main chain during titration. It is desirable to determine the amount by the above labeling method.
- the "lactic acid-glycolic acid polymer” or “lactic acid polymer” includes, for example, lactic acid and glycolic acid, or lactic acid-based non-catalytic dehydration polycondensation (JP-A-61-28521), or lactide and glycolide, or It can be produced by ring-opening polymerization using a catalyst such as lactide or the like, which has the property of cyclic diesterification (Encyclopedic Handbook of Biomatenals and Bioengineering Part A: Materials, Volume 2, Marcel Dekker, Inc. 1995).
- the polymer obtained by the above-mentioned known ring-opening polymerization method does not necessarily have a free carboxyl group at the terminal of the obtained polymer, but for example, the hydrolysis described in EP-A-0839525 Attach to the reaction As a result, the polymer can be modified into a polymer having a certain amount of carboxyl group per unit mass, and the use of this is less.
- lactic acid-glycolic acid polymer having a free carboxyl group at the terminal or "lactic acid polymer having a free carboxyl group at the terminal” can be prepared by a known production method (for example, a non-catalytic dehydration polycondensation method, 28521, JP-A-10-182496, JP-A-2000-234016), or a method similar thereto.
- a known production method for example, a non-catalytic dehydration polycondensation method, 28521, JP-A-10-182496, JP-A-2000-234016
- long-term sustained release microcapsules include, for example, those described in WO03Z002092, which contain (i) a GnRH agonist or a salt thereof and (ii) a polymer having a weight average molecular weight of 5000 or less.
- Microcapsules (A) containing 5% by weight or less of a lactic acid polymer having a weight average molecular weight of about 15,000 to about 50,000 are used.
- the content of the GnRH agonist or a salt thereof is, for example, about 0.001 to about 50% (wZw), preferably about 0.02 to about 40% (wZw) based on the whole composition. , Even more preferably from about 0.1 to about 30% (wZw), more preferably from about 0.1 to about 24% (w / w), particularly preferably from about 3 to about 24% (w / w), most preferably Is about 14 to about 24% (wZw).
- the lactic acid polymer preferably has a content of a polymer having a molecular weight of 5,000 or less of about 5% by weight or less and a polymer of a molecular weight of 3,000 or less having a content of about 1.5% by weight or less, and more preferably has a molecular weight of 5,000 or less.
- Polymer content of 5000 or less is about 5% by weight or less
- polymer of 3000 or less is about 1.5% by weight or less
- polymer of 1000 or less is about 0.1% by weight or less. belongs to.
- the weight average molecular weight of the lactic acid polymer is preferably 15,000 to 40,000, more preferably ⁇ 15,000 to about 30,000, and more preferably ⁇ 17,000 to about 30,000.
- the weight average molecular weight can be measured, for example, using the above-mentioned standard substance B group.
- a microcapsule (C) or the like which releases the GnRH agonist or its salt over a period of two or more months, which is prepared by subjecting the WZO emulsion prepared from the phase solution to a micro force, is used.
- the microcapsules (B) are novel microcapsules, preferably containing (i) GnRH agost or a salt thereof, no drug-retaining substance! / Solution and (ii) weight average molecular weight (M w ) Is about 8,000 to about 11,500, and the ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) is greater than 1.9.
- the composition molar ratio of lactic acid and glycolic acid is 99.9 / 0
- a solution containing a lactic acid-glycolic acid polymer or a salt thereof, which is 60Z40, adjusted to about 25 ° C to about 35 ° C is mixed to produce a WZO emulsion at about 25 ° C to about 35 ° C. Is cooled to about 15 to about 20 ° C, and the WZO-type emulsion is dispersed in an aqueous phase to produce a WZOZW-type emulsion.
- the lactic acid-glycolic acid polymer or its salt used in the microcapsule (B) has a weight average molecular weight (Mw) of about 8,000 to about 11,500, and the lactic acid-glycolic acid polymer has a weight average molecular weight (Mw).
- Mw weight average molecular weight
- Mn number average molecular weight of the lactic acid-glycolic acid polymer
- Examples of the lactic acid-glycolic acid polymer salt include inorganic bases (eg, alkali metals such as sodium and potassium, alkaline earth metals such as calcium and magnesium) and organic bases (eg, organic amines such as triethylamine, and anoreginine). And the like, and salts with transition metals (eg, zinc, iron, copper, etc.) and complex salts.
- the ratio (MwZMn) of the weight average molecular weight (Mw) of the lactic acid-daricholic acid polymer to the number average molecular weight (Mn) of the lactic acid-glycolic acid polymer is preferably about 1.95 to about 4.0, about 2.0 to about 3.5, more preferably about 2.3 to about 3.1.
- composition ratio (mol%) of lactic acid-daricholic acid polymer is better than 99Z1-60Z40 Masukuma 90 / 10-1 60/40, more preferably 80 / 20-1 60/40, especially 80 / 20-70 / 30 Preferable! / ⁇ .
- the weight average molecular weight of the lactic acid-daricholic acid polymer is usually about 8,000 to about 11,500, preferably ⁇ 9,000 to about 11,500, and more preferably ⁇ 9,500 to It is about 11,000.
- the weight average molecular weight, number average molecular weight, and dispersity referred to herein are polystyrene equivalent values measured by gel permeation chromatography (GPC) using several types of polystyrene having a specific weight average molecular weight as a reference substance. Refers to the molecular weight (weight average and number average) and the calculated degree of dispersion.
- the column and mobile phase used for the measurement can be appropriately selected.
- the lactic acid / glycolic acid copolymer is dissolved in dichloromethane, and water is added for distribution.
- the number average molecular weight can be calculated by titrating the dichloromethane layer with an ethanolic potassium hydroxide solution using an automatic titrator and calculating the amount of terminal carboxylic acid.
- this is referred to as a number average molecular weight determined by terminal group quantification.
- the number average molecular weight determined by end group quantification is an absolute value
- the number average molecular weight determined by GPC measurement depends on the analysis or analysis conditions (e.g., mobile phase type, column type, reference material, selection of slice width, base (E.g., selection of line), it is difficult to obtain a unique numerical value, but for example, it is synthesized from lactic acid and glycolic acid by a noncatalytic dehydration polycondensation method, and a free carboxyl group is added to the terminal.
- the number average molecular weight determined by GPC and the number average molecular weight determined by terminal group quantification are almost the same in the polymer.
- the term "substantially the same as in the case of the lactic acid-dalicholate polymer” means that the number average molecular weight determined by terminal group quantification is in the range of about 0.2 to about 1.5 times the number average molecular weight determined by GPC measurement, and is preferable. Means within the range of about 0.3 to about 1.2 times.
- the GPC method of Reference Example 5 refers to eight kinds of polystyrene standard products (standards) whose weight average molecular weights (Mw) evaluated by the GPC method are 98900, 37200, 17100, 9490, 5870, 2500, 1051, and 495. This is a GPC method that measures using substance C).
- the weight average molecular weight and the number average molecular weight of the lactic acid-daricholic acid polymer or a salt thereof used in the microcapsule (B) can be measured, for example, using the GPC method of Reference Example 5.
- lactic acid-glycolic acid polymers are preferably used.
- the rate of decomposition and disappearance of the lactic acid-glycolic acid polymer varies greatly depending on the composition or molecular weight.In general, the lower the glycolic acid fraction, the slower the decomposition and disappearance, and therefore the force or molecular weight that lowers the glycolic acid fraction.
- the release period can be lengthened by increasing. Conversely, the release period can be shortened by increasing the glycolic acid fraction or decreasing the molecular weight.
- a lactic acid-glycolic acid polymer having the above composition ratio and weight average molecular weight is preferred.
- a lactic acid-glycolic acid polymer that degrades faster than a lactic acid-glycolic acid polymer in the above-mentioned composition ratio and weight-average molecular weight range is selected, it is difficult to suppress the initial release, and conversely, the above-mentioned composition ratio and weight-average molecular weight If a lactic acid-glycolic acid polymer that degrades more slowly than a lactic acid-glycolic acid polymer in the range described above is selected, a period in which an effective amount of the drug is not released is likely to occur.
- the lactic acid-glycolic acid polymer is prepared by, for example, using non-catalytic dehydration polycondensation of lactic acid and glycolic acid (Japanese Patent Application Laid-Open No. 61-28521) or a catalyst having a cyclic body such as lactide and glycolide. (Encyclopedic Handbook of Biomaterials and Bioengineering Part A: Materials, Volume 2, Marcel Dekker, Inc. 1995).
- the polymer synthesized by ring-opening polymerization is a polymer having no carboxyl group, but a polymer obtained by treating the polymer in a diagonal manner to give a free carboxyl group (Journal Control). The use of J. Controlled Release, Vol. 41, pp. 249-257, 1996).
- the lactic acid-glycolic acid polymer having a free carboxyl group at the terminal can be produced without problems by a known production method (for example, a non-catalytic dehydration polycondensation method, see JP-A-61-28521), and furthermore, at the terminal.
- a polymer having a free carboxyl group can be produced by a known production method (for example, see W094Z15587).
- lactic acid whose terminal was converted into a free carboxyl group by chemical treatment after ring-opening polymerization -Glycolic acid polymer is, for example, Boehringer Engelheim (Boehringer
- hydrolysis of the lactic acid-glycolic acid polymer produced by ring-opening polymerization is carried out in the presence of an acid or a base according to a known method. Further, the hydrolysis is performed in the presence of water.
- examples of the acid include inorganic acids such as hydrochloric acid, nitric acid, sulfuric acid, and phosphoric acid, and organic acids such as lactic acid, acetic acid, tartaric acid, citric acid, and succinic acid.
- examples of the base include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, and alkali metal carbonates such as sodium carbonate and potassium carbonate.
- Examples of such a solvent include alcohols such as methanol, ethanol, and propanol; ethers such as tetrahydrofuran, dioxane, getyl ether, and diisopropyl ether; water; and a mixed solvent thereof. Further, an excess amount of the above acid or base may be used as the solvent.
- the temperature during the hydrolysis is, for example, about 0 to about 100 ° C, preferably about 10 to about 100 ° C.
- the time required for hydrolysis depends on the weight average molecular weight of polylactic acid produced by ring-opening polymerization, the type of acid or base, the type of solvent, the temperature, etc. May be determined as appropriate by collecting the lactic acid-glycolic acid polymer and measuring the weight average molecular weight of the collected lactic acid-glycolic acid polymer.
- the time required for the hydrolysis is not particularly limited, but is, for example, about 1 hour to about 10 days, preferably about 10 hours to about 5 days.
- the lactic acid-glycolic acid polymer produced by ring-opening polymerization cannot be produced by sustained-release microcapsules with a large initial burst.
- the hydrolyzed lactic acid-glycolic acid polymer is preferably further subjected to a purification step.
- the hydrolyzed lactic acid-glycolic acid polymer is dissolved in an organic solvent, and the resulting solution is injected into water or a mixed solution of water and a water-soluble organic solvent to precipitate the lactate-glycolic acid polymer. This is done by separating.
- organic solvent examples include halogenated hydrocarbons (eg, dichloromethane, black form, black ethane, dichloroethane, trichloroethane, tetrachlorodicarbon, etc.), ketones (eg, acetone, etc.), ethers (Eg, tetrahydrofuran, ethyl ether, isopropyl ether, etc.), esters (eg, ethyl acetate, butyl acetate, etc.), and aromatic hydrocarbons (eg, benzene, toluene, xylene, etc.).
- the amount of the organic solvent used is, for example, about 3 to about 20 times (wZv) the hydrolyzed polylactic acid.
- water-soluble organic solvent examples include acetone, methanol, ethanol, tetrahydrofuran, acetonitrile and the like.
- the amount of water or a mixture of water and a water-soluble organic solvent is not particularly limited, but is usually a large excess with respect to the hydrolyzed polylactic acid.
- the temperature in the purification step is usually about 0 to about 90. ° C, preferably about 20 to about 70 ° C.
- lactic acid-glycolic acid polymer produced by ring-opening polymerization by subjecting the lactic acid-glycolic acid polymer produced by ring-opening polymerization to hydrolysis and purification steps, harmful catalysts used during ring-opening polymerization (e.g. It is possible to produce a lactic acid / glycolic acid polymer that is substantially free of a Suzuki conjugate such as stannous octoate.
- harmful catalysts used during ring-opening polymerization e.g. It is possible to produce a lactic acid / glycolic acid polymer that is substantially free of a Suzuki conjugate such as stannous octoate.
- a drug-retaining substance is a water-soluble substance that is difficult to dissolve in an organic solvent in an oil phase. When dissolved in water, the substance becomes a highly viscous semi-solid, or an external force.
- Factors such as temperature, pH, metal ions (eg, Cu 2+ , Al 3+ , Zn 2+, etc.), organic acids (eg, tartaric acid, citrate, tannic acid, etc.) or salts thereof, and chemical condensing agents (eg, For example, Daltaraldehyde, Aceta
- an action such as aldehyde, the viscosity is increased more remarkably, and the substance has a property of forming a semi-solid or solid matrix.
- Examples of the drug-retaining substance include natural! And synthetic rubbery or high-molecular compounds.
- Examples of natural gums include acacia gum, gum arabic, Irish moss, karaya gum, tragacanth gum, guayata gum, xanthan gum, locust bean gum and the like.
- Examples of natural polymer compounds include proteins such as casein, gelatin, collagen, albumin (eg, human serum albumin), globulin, and fibrin, and carbohydrates such as cellulose, dextrin, pectin, starch, agar, and mannan. These may be used as they are, or may be synthetic gums partially modified chemically, for example, those in which the above-mentioned natural gums are converted into esters or ethers (eg, methinoresenorelose, ethylcellulose, potash). It may be in the form of methyl cellulose, gelatin succinate, etc.), hydrolyzed (eg, sodium alginate, sodium pectate, etc.) or salts thereof.
- esters or ethers eg, methinoresen
- the synthetic polymer compound examples include a polyvinyl compound (eg, polyvinyl pyrrolidone, polyvinyl alcohol, polyvinyl methyl ether, polyvinyl ether, etc.), a polycarboxylic acid (eg, polyacrylic acid, polymethacrylic acid) , Carbopol (Goodrich), polyethylene compounds (eg, polyethylene glycol, etc.), polysaccharides (eg, polysucrose, polyglucose, polyratatose, etc.) and salts thereof.
- a polyvinyl compound eg, polyvinyl pyrrolidone, polyvinyl alcohol, polyvinyl methyl ether, polyvinyl ether, etc.
- a polycarboxylic acid eg, polyacrylic acid, polymethacrylic acid
- Carbopol Goodrich
- polyethylene compounds eg, polyethylene glycol, etc.
- polysaccharides eg, polysucrose, polyglu
- gelatin especially gelatin, such as albumin, pectin or agar, is relevant.
- the microcapsules (B) may contain microparticles (that is, microspheres) containing GnRH agonist or a salt thereof and a lactic acid-glycolic acid polymer or a salt thereof!
- the fine particles include, for example, microcapsules containing one GnRH agonist or a salt thereof in one particle, and multiple GnRH agonists or a salt thereof in one particle.
- Polynuclear microcapsules containing a core or GnRH in molecular form Fine particles obtained by dissolving or dispersing the agost or a salt thereof as a solid solution in a raw lactic acid-glycolic acid polymer or a salt thereof are included.
- the content of the GnRH agonist or its salt in the microcapsule may vary depending on the type of the GnRH agonist or its salt, the desired pharmacological effect and the duration of the effect, for example, from about 0.01 to about 50. % (w / w), preferably about 0.1 to about 30% (w / w), preferably about 5 to about 24% (w / w).
- the microcapsule (B) contains (i) a solution containing GnRH agonist or a salt thereof and not containing a drug carrier, and (ii) a weight average molecular weight (Mw) of about 8,000 to about 11,500, A lactic acid-glycolic acid polymer having a weight average molecular weight (Mw) / number average molecular weight (Mn) ratio of greater than 1.9 and a composition molar ratio of lactic acid and glycolic acid of 99.9 / 0.1-1 60Z40 or A solution containing the salt (hereinafter abbreviated as biodegradable polymer) and adjusted to about 25 to about 35 ° C is mixed to produce a WZO emulsion at about 25 to about 35 ° C (primary emulsification).
- biodegradable polymer A solution containing the salt
- the WZO-type emulsion was dispersed in an aqueous phase to produce a WZOZW-type emulsion (secondary emulsification), and the WZOZW-type emulsion was dried in water. It is manufactured by attaching.
- the solution is the internal aqueous phase, and the solution containing the biodegradable polymer adjusted to about 25-35 ° C is the oil phase
- the WZO type emulsion can be produced as follows.
- GnRH agonist or a salt thereof is added to water (preferably distilled water for injection) by about 0.001 to about 90% (wZw), preferably about 0.01 to about 80% (wZw), more preferably about 1%. It is dissolved to a concentration of about 70% (wZw), particularly preferably about 50%, to form an internal aqueous phase.
- the inner aqueous phase contains pH adjusters to maintain the stability and solubility of the GnRH agonist or its salts, such as carbonic acid, acetic acid, oxalic acid, citric acid, phosphoric acid, hydrochloric acid, sodium hydroxide, and arginine. , Lysine and their salts may be added.
- a stabilizer for GnRH agonist or a salt thereof albumin, gelatin, trehalose, citrate, sodium ethylenediaminetetraacetate, dextrin, cyclodextrin —, ⁇ -, ⁇ — and derivatives thereof (eg, maltoseal) 13-cyclodextrin, ⁇ -cyclodextrin sulfobutyl ether, etc.), sodium bisulfite, polyethylene glycol, etc.
- polyoxyethylene sorbitan fatty acid esters eg, Tween 80, Tween 60 (Kao, Japan)]
- polyoxyethylene castor oil derivatives eg, HCO-60, HCO-70 (Nikko Chemicals, Japan)
- An activator, paraoxybenzoic acid esters (eg, methyl paraben, propyl paraben, etc.), benzyl alcohol, chlorobutanol, thimeru sal, etc. may be added to the mixture.
- the inner aqueous phase thus obtained is mixed with a solution (oil phase) containing a biodegradable polymer adjusted to about 25 to about 35 ° C, and the resulting mixture is subjected to an emulsification step to obtain a WZO type Prepare an emulsion.
- the solution (oil phase) containing the biodegradable polymer a solution in which the biodegradable polymer is dissolved in an organic solvent is used.
- organic solvent include those which have a boiling point of about 120 ° C. or less and are hydrophobic and capable of dissolving a biodegradable polymer.
- halogenated hydrocarbons eg, dichloromethane (methylene chloride), chloroform) Form, black ethane, dichloroethane, trichloroethane, tetrachloroethane, etc.
- fatty acid esters eg, ethyl acetate, butyl acetate, etc.
- ethers eg, ethyl ether, isopropyl ether, etc.
- aromatic hydrocarbons Eg, benzene, toluene, xylene, etc.
- two or more of these organic solvents may be mixed and used at an appropriate ratio.
- the organic solvent is preferably chloride methylene.
- the concentration of the biodegradable polymer in the organic solvent varies depending on the type of the biodegradable polymer, the molecular weight, and the type of the organic solvent, but is usually about 0.01 to about 90% (wZw), preferably about 0%. 1-about 80% (wZw), more preferably about 1 to about 70% (wZw), particularly preferably about 35%.
- a partially hydrophilic organic solvent such as ethanol, acetonitrile, acetone, tetrahydrofuran, etc. is added to the oil phase. It may be added. Further, a surfactant such as sucrose fatty acid ester may be added to dissolve or stabilize the internal GnRH agonist or its salt.
- the oil phase thus obtained is usually used after filtering and removing bacteria with a filter.
- the mixture ratio of the solution and the biodegradable polymer solution containing GnRH agonist or a salt thereof and containing no drug-retaining substance is about 0. 1 to about 1000 parts by weight, preferably about 1 to about 100 parts by weight, more preferably about 1 to about 20 parts by weight, particularly preferably about 10 parts by weight.
- the force varies depending on the type of the GnRH agonist or its salt, the desired pharmacological effect and the duration of the effect, etc.
- the ratio of the GnRH agonist or its salt to the biodegradable polymer About 0.01 to about 50% (w / w ), Preferably about 0.5 to about 40% (w / w), more preferably about 0.1 to about 30% (wZw), and particularly preferably about 10%.
- the emulsification step is performed by a known dispersion method, for example, an intermittent shaking method, a method using a stirrer such as a propeller-type stirrer or a turbine-type stirrer, a colloid mill method, a homogenizer method, an ultrasonic irradiation method, or the like.
- the solution containing the GnRH agonist or a salt thereof and no drug-retaining substance! / ⁇ The solution containing the solution and the biodegradable polymer is subjected to about 25 to about 35 ° C, preferably about 27 to about 33 ° C. Mix at a temperature of. By this temperature adjustment, sustained-release microcapsules having good ball-forming properties and Z or needle passing properties can be produced.
- a GnRH agonist or a salt thereof is contained, and a drug-retaining substance is not contained! / ⁇
- coarse emulsification is performed by shaking or shaking the container.
- the temperature of the mixture of the solution containing the GnRH agonist or a salt thereof and containing no drug-retaining substance, and the solution containing the biodegradable polymer is about 25 ° C to about 35 ° C, preferably about 27 ° C. It is preferable to adjust about 33 ° C! / ,.
- the purpose of the coarse emulsification is to facilitate the next emulsification step (fine emulsification), and the stirring time, vibration and number of oscillations are not particularly limited. Therefore, when the milk is uniformly refined, the coarse emulsification step may be omitted.
- the mixture after the coarse emulsification is subjected to an emulsification step (fine emulsification) using a propeller type stirrer or the like.
- the time of fine emulsification it contains GnRH agonist or its salt and does not contain drug-retaining substance.
- the temperature of the mixture of the solution and the solution containing the biodegradable polymer is adjusted to about 25 to about 35 ° C, preferably about 27 to about 33 ° C. By this temperature adjustment, sustained-release microcapsules having good ball making properties and Z or needle passing properties can be produced.
- the emulsification time for the fine emulsification can be selected according to the properties of the GnRH agonist or a salt thereof and the biodegradable polymer, but is generally in the range of about 0.1 to about 60 minutes.
- the volume of the oil phase to be mixed is about 1 to about 1000 times, preferably about 2 to about 100 times, more preferably about 3 to about 10 times the volume of the internal aqueous phase.
- the viscosity range of the resulting WZO emulsion is generally about 12 to about 25 ° C, about 10 to about 10, OOOcp, and preferably ⁇ 100 to about 5,000cp. Particularly preferred ⁇ is about 500—about 2, OOOcp.
- the WZO emulsion obtained by the fine emulsification is cooled in a water bath at about 0 to about 18 ° C, and the temperature of the W / O emulsion is reduced to about 0 to about 30 ° C, preferably about 10 to about 25 ° C.
- the temperature is more preferably adjusted to about 15 to about 20 ° C.
- the WZO-type emulsion thus obtained is dispersed in an aqueous phase (hereinafter, abbreviated as an external aqueous phase) to produce a wZoZw-type emulsion, and the wZoZw-type emulsion is subjected to drying in water to gradually reduce Manufacture release microcapsules.
- an aqueous phase hereinafter, abbreviated as an external aqueous phase
- the emulsifier may be any one as long as it generally forms a stable OZW emulsion, but may be, for example, an aeon surfactant (eg, sodium oleate, sodium stearate, sodium lauryl sulfate, etc.), a non-aqueous surfactant.
- the surfactant include ionic surfactants (eg, Tween 80, Tween 60, HCO-60, HCO-70, etc.), polyvinyl alcohol, polyvinylpyrrolidone, and gelatin. These emulsifiers may be used as a mixture of two or more kinds at an appropriate ratio.
- polyvinyl alcohol is preferably used as a milking agent.
- the concentration of the emulsifier in the external aqueous phase is, for example, about 0.001 to about 20%, preferably about 0.01 to about 10%, more preferably about 0.05 to about 5%, and particularly preferably about 0.1%. It is.
- An osmotic pressure regulator may be added to the above external aqueous phase!
- the osmotic pressure adjusting agent any one that exhibits an osmotic pressure when it is used as an aqueous solution can be used.
- osmotic pressure adjusting agent examples include polyhydric alcohols, monohydric alcohols, and monosaccharides. , Disaccharides, oligosaccharides and amino acids or their derivatives, sodium salt and the like.
- polyhydric alcohols examples include trihydric alcohols such as glycerin, pentahydric alcohols such as arabitol, xylitol and adtol, and hexahydric alcohols such as mannitol, sorbitol and dulcitol. Are used. Of these, mannitol is particularly preferred, in which hexavalent alcohols are preferred.
- Examples of the above monohydric alcohols include methanol, ethanol, isopropyl alcohol and the like, and among them, ethanol is preferable.
- Examples of the above monosaccharides include pentoses such as arabinose, xylose, ribose, and 2-deoxyribose, and hexacarbons such as glucose, fructose, galactose, manose, sorbose, rhamnose, and fucose. Of these, hexoses are preferred.
- oligosaccharides for example, trisaccharides such as maltotriose and raffinose sugar, tetrasaccharides such as stachyose and the like are used, and among them, trisaccharides are preferable.
- disaccharide and oligosaccharide derivatives for example, dalcosamine, galatatosamine, glucuronic acid, galataturonic acid and the like are used.
- any L-integrated amino acid can be used, and examples thereof include glycine, leucine and arginine. Of these, L-arginine is preferred. These osmotic pressure regulators may be used alone or in combination.
- osmotic pressure regulators have a concentration such that the osmotic pressure of the external aqueous phase is about 1Z50 to about 5 times, preferably about 1Z25 to about 3 times, more preferably about 1Z12 to about 2 times the osmotic pressure of physiological saline. Used in
- the concentration of the osmotic agent in the outer aqueous phase is about 0.01 to about 60% (w / w), preferably about 0.1% when the osmotic agent is a nonionic substance. 01-about 40% (w / w), more preferably about 0.05-about 30% (wZw), particularly preferably about 0.5-about 1.5% (wZw).
- the osmotic pressure adjusting agent is an ionic substance, a concentration obtained by dividing the above concentration by the total ionic value is used.
- the concentration of the osmotic pressure adjusting agent need not be lower than the solubility, and may be partially dispersed.
- the dispersibility of the produced microcapsules can be improved, and the degree thereof is not particularly limited.For example, about 400 to 70 Omg of microcapsules can be used. Preferably, it can be dispersed in 5 mL of a dispersion medium for injection in less than 2 minutes.
- Removal of the organic solvent may be performed according to a known method. Such methods include, for example, a method of removing the solvent under normal pressure or gradually reducing the pressure while stirring with a propeller-type stirrer or a magnetic stirrer, or adjusting the degree of vacuum and temperature using a rotary evaporator or the like. While removing the solvent.
- the sustained-release microcapsules obtained in this way are separated by centrifugation or filtration, wet cyclone, etc., and washed repeatedly with distilled water several times to remove free adhering to the surface of the microcapsules. Remove GnRH agonist or its salt, drug holding substance, emulsifier, etc. Next, the washed microcapsules are dried under reduced pressure, or re-dispersed in distilled water and freeze-dried to further remove the organic solvent.
- an aggregation inhibitor may be added to prevent aggregation of the particles.
- the coagulation inhibitor include water-soluble polysaccharides such as mannitol, ratatose, glucose, starches (eg, corn starch), amino acids such as glycine, and proteins such as fibrin and collagen. . Of these, mannitol is preferred.
- the amount of the anti-agglomeration agent such as mannitol is usually about 0.1 to about 24% by weight based on the whole microcapsules.
- the sustained release microcapsules of the present invention preferably contain an excipient.
- the excipient may be one that is less toxic even when administered to a living body, is easy to dry such as freeze-dried, and is readily dissolved when administered to a living body, or is soluble when used. desired.
- examples of such excipients include sugars, cellulose derivatives, amino acids, proteins, polyacrylic acid derivatives, organic salts, and inorganic salts. These excipients may be used by mixing two or more kinds in an appropriate ratio.
- examples of the sugar include D-mantol, sodium alginate, fructose, dextran, dextrin, sucrose, D-sorbitol, ratatose, glucose, maltose, starches, trehalose and the like.
- examples of the cellulose derivative include carboxymethylcellulose, hydroxypropyl methinoresenolerose, etinoresenolerose, hydroxymethinoresenolerose, hydroxypropinoresenolerose, cenorellose acetate phthalate, hydroxypropinolemethinoresenorelose phthalate, and hydroxymethylcellulose acetate succinate.
- examples of the amino acid include glycine, alanine, tyrosine, arginine, lysine and the like.
- Examples of the protein include fibrin, collagen, albumin and the like.
- Examples of the polyacrylic acid derivative include sodium polyacrylate, methacrylic acid Zacrylic acid copolymer (Eudragit, manufactured by Rohm, Germany), and the like.
- organic salt examples include sodium citrate, sodium tartrate, sodium carbonate, potassium carbonate and the like.
- Examples of the inorganic salt include sodium salt sodium, potassium salt sodium, sodium phosphate, phosphoric acid lithium and the like.
- a water-soluble polymer that does not dissolve the polymer serving as the base for sustained-release microcapsules for example, polyvinylpyrrolidone, polyvinyl alcohol, and the like are used.
- the excipient is preferably a saccharide, especially D-mannitol which is easy to freeze-dry and has low toxicity.
- the amount of excipient used is determined by the solubility of the excipient and the tonicity, viscosity, dispersibility, and stability of the solution obtained by dissolving the excipient. If so, the excipient content in the dry sustained release microcapsules, for example, from about 0.5 to about 99% (w / w), preferably from about 1 to about 90% (w / w), more preferably Used to be about 2 to about 60% (w / w). When D-mantol is used as an excipient, the content of the excipient in the dry sustained-release microcapsules is about 2 to about 40% (w / w), preferably about 15% (w Zw). Preferably.
- sustained-release microcapsules By adding these excipients, 1) the frequency of contact and collision of particles of the sustained-release microcapsules during and after drying is reduced, and the uniformity of the particles during lyophilization is maintained. ) It becomes possible to dry the sustained release microcapsules at a temperature higher than the glass transition point. 3) The sustained-release microcapsules have improved stability over time, good dispersibility, and long-term storage at room temperature without being limited to cold storage. Excellent effects such as obtaining sustained-release microcapsules having a limited expiration date can be obtained.
- the microcapsule (B) containing an excipient can be produced, for example, by mixing the microcapsule obtained by the above-mentioned in-water drying method with an excipient.
- the microcapsules may be dried under reduced pressure after washing, or may be redispersed in distilled water after washing and freeze-dried.
- the method of mixing is not particularly limited, and is performed using, for example, a mixer.
- microcapsules (B) containing excipients are also produced by using an aqueous excipient solution in the outer aqueous phase when producing the WZOZW emulsion used in the underwater drying method. be able to.
- the microcapsules (B) containing the excipient are preferably obtained by washing the microcapsules obtained by a method of drying in water, and dispersing the washed microcapsules in distilled water in which the excipient is dissolved or suspended. It is manufactured by freeze-drying or drying under reduced pressure.
- the washed microcapsules may be dispersed in distilled water, and the excipient may be dissolved or suspended in the resulting dispersion, followed by freeze-drying or vacuum drying.
- disperse the washed microcapsules in distilled water in which the excipient is dissolved dissolve the excipient in the dispersion obtained by dispersing the washed microcapsules in distilled water, and freeze-dry. By doing so, a uniform mixture is obtained.
- the microcapsules obtained by the above-mentioned in-water drying method are optionally heated to a temperature not lower than the glass transition temperature (Tg) of the polymer used as the base, so that the particles of the microcapsules do not adhere to each other.
- Tg glass transition temperature
- the organic solvent in the microcapsules can be more completely removed, and the sustained-release property can be improved.
- the organic solvent is preferably removed to less than about 100 ppm, preferably less than about 500 ppm, and more preferably to less than about ⁇ pm.
- the glass transition temperature refers to a midpoint glass transition temperature obtained when a heating rate is increased at 10 or 20 ° C./min using a differential scanning calorimeter (DSC).
- the heating is preferably performed after adding an excipient, if desired, and then freeze-drying or drying the microcapsules under reduced pressure.
- the heating is not particularly limited.
- the heating temperature is lower than the glass transition temperature of the polymer used as the base, water or organic solvents may not be removed sufficiently. If the heating temperature is too high, fusion or deformation of microcapsules, GnRH agost or its salt may occur.
- the heating temperature cannot be unambiguously defined because the risk of decomposition and deterioration of the polymer increases, but the physical properties (eg, molecular weight, stability, etc.) of the polymer used as the base, GnRH agonist or its salt, It can be appropriately determined in consideration of the average particle diameter of the capsule, the heating time, the degree of drying of the microcapsules, the heating method, and the like.
- the heating temperature is preferably a temperature at which the glass transition temperature of the polymer used as a base is not more than about 40 ° C higher than the glass transition temperature, preferably a temperature at which the glass transition temperature of the polymer is about 35 ° C higher than the glass transition temperature.
- the following temperatures more preferably the temperature at which the glass transition temperature of the polymer is also about 25 ° C higher than the glass transition temperature, and particularly preferably the temperature at which the glass transition temperature of the polymer is also about 20 ° C higher.
- the heating time varies depending on the heating temperature, the amount of the microcapsules to be treated, and the like. In general, after the temperature of the microcapsules themselves reaches a predetermined temperature, about 6 to about 120 hours, and more preferably about 12—approximately 96 hours.
- the upper limit of the heating time is not particularly limited as long as the residual organic solvent and water content are below the allowable values. However, under the condition of the glass transition temperature or higher, the microcapsules soften, and the physical contact between microcapsules or the force of microcapsules occurs. Since deformation occurs due to the load at the time of laminating the capsules, it is preferable to terminate the heating as soon as the residual amount of the organic solvent and water becomes less than the allowable value.
- the heating method is not particularly limited, but any method may be used as long as the microcapsules are uniformly heated.
- Preferable specific examples of the heating method include, for example, a method of heating and drying under reduced pressure using a freeze dryer, a reduced-pressure thermostat, or the like.
- the particle diameter of the microcapsule (B) may be within a range that satisfies the dispersibility and needle penetration property.
- the average diameter is about 0.1 to about 1000 ⁇ m, preferably about 1 to about 300 ⁇ m, More preferably, it is about 5 to about 150 ⁇ m.
- microcapsules and the like have a high desolvation rate at the time of production, for example, the completion of the underwater drying step Since the concentration of residual methylene chloride in the composition after (for example, after 3 hours) is usually about 2, OOO ppm to about 20, OO ppm, it has excellent solvent removal properties.
- microcapsules have the excellent property of slow sedimentation velocity.
- the sedimentation rate is determined, for example, by filling 50 mg of microcapsule (B) powder in a vial, suspending the suspension in 5 ml of a dispersion medium, dispersing about 401 of the obtained suspension in 5 ml of a dispersion medium, and measuring the NTU with a turbidimeter.
- Can be determined by measuring Microcapsules) have the property that the time required for turbidity to become 50% is slow when the turbidity immediately after suspension is 100%.
- the composition ratio of lactic acid-Z glycolic acid is preferably 90,10-100,0, and particularly preferably ⁇ 100 ZO.
- the copolymer or homopolymer preferably has a weight average molecular weight of about 7,000 to about 25,000 for lactic acid / glycolic acid, and about 7,000 to about 90,10 for S100Z0. In the case of 30,000 and 80Z20, it is about 12,000-about 30,000.
- the weight average molecular weight can be measured, for example, using the above-mentioned standard substance A group.
- the concentration of the GnRH agonist or a salt thereof in the inner aqueous phase solution is usually about 20-70% (w / w), preferably about 25-65% (w / w), and more preferably 35-60%. (wZw).
- the concentration of the copolymer or homopolymer in the oil phase liquid is usually about 0.5-90% (w / w), preferably about 2-60% (w / w).
- the period of zero-order release of GnRH agonist or a salt thereof is preferably from 2 months to 4 months, more preferably about 3 months.
- microcapsules (MC) # 2 manufactured in Reference Example 2 described later are used.
- microcapsules (MC) # 1 produced in Reference Example 1 described later are used.
- microcapsules (MC) # 3 manufactured in Reference Example 3 described later are used.
- the microcapsules are dispersed (eg, Tween 80). , HCO-60, carboxymethylcellulose, sodium alginate, etc.), preservatives (eg, methylparaben, propylparaben, etc.), tonicity agents (eg, sodium salt, mannitol, sorbitol, glucose, etc.) and aqueous It is used as a suspension or dispersed together with vegetable oils such as sesame oil and corn oil to form an oily suspension, which is a sustained-release injection that can be actually used.
- the sustained-release preparation of the present invention comprises a microcapsule for gradually releasing GnRH agonist or a salt thereof for a long period of time, as described above, in particular, formulated as a sustained-release injection, and a short-term GnRH agonist.
- a microcapsule capable of sustained release of a salt thereof may be used in the form of a sustained-release preparation as described above, particularly in combination with a preparation prepared as a sustained-release injection, or may be used for a long period of time.
- a microcapsule in which a microcapsule that releases salt slowly and a microcapsule that releases GnRH agonist or its salt for a short period of time is formulated into a sustained-release formulation as described above, especially after formulation as a sustained-release injection. It is easier to use.
- An agent comprising the above GnRH agonist preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate) (preferably leuprorelin or a salt thereof (preferably leuprorelin acetate)
- An agent comprising a sustained release microcapsule can be easily administered as it is to a subcutaneous, intramuscular, or blood vessel (preferably, subcutaneously or intramuscularly) as an injection.
- the sustained-release preparation of the present invention can be easily administered as it is to a subcutaneous, intramuscular, or blood vessel (preferably, subcutaneously or intramuscularly) as it is.
- a mixture of a short-term sustained-release microcapsule and a long-term sustained-release microcapsule was formulated into a sustained-release formulation, or a mixture of a short-term sustained-release formulation and a long-term sustained-release formulation was formulated.
- a drug when administered, it can be easily administered as an injection, for example, subcutaneously, intramuscularly, or vascularly (preferably subcutaneously or intramuscularly).
- the short-term sustained-release formulation and the long-term sustained-release formulation can be administered by different routes, such as subcutaneously and intramuscularly.
- the dosage of the above formulation is GnRH agonist (preferably leuprorelin or The content of the salt, more preferably leuprorelin acetate, the dosage form, the duration of the GnRH agonist (preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate), the animal to be administered [eg, GnRH agonists (preferably leuprorelin or a salt thereof, more preferably different depending on warm-blooded mammals (eg, human, mouse, rat, porch egret, sheep, pig, porcupine, poma etc.)] May be a pharmaceutically effective amount of leuprorelin acetate).
- GnRH agonists preferably leuprorelin or a salt thereof, more preferably different depending on warm-blooded mammals (eg, human, mouse, rat, porch egret, sheep, pig, porcupine, poma etc.)
- warm-blooded mammals eg, human, mouse, rat
- a daily dose in the warm-blooded mammal of about O.Olmg to 100 mgZkg body weight, preferably about 0.02 mg to 50 mgZkg body weight, more preferably 0.05 mg to 20 mgZkg body weight can be appropriately selected.
- GnRH agonist preferably leuprorelin or a salt thereof, more preferably acetate Leuprorelin
- GnRH agonist is usually administered subcutaneously or intramuscularly in an amount of about 0.01 to 50 mg, preferably about 0.1 to 20 mg, more preferably about 0.1 to 15 mg.
- GnRH agonist preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate.
- the dose varies depending on the period of sustained-release microcapsule drug release.
- GnRH agost preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate
- GnRH agost is usually about 0.01 to 25 mg, preferably about 0.1 to 15 mg, more preferably about 0.1 to 0.1 mg per dose.
- GnRH Goose Preferably leuprorelin or a salt thereof, more preferably leuprorelin acetate
- GnRH agonist preferably leuprorelin or a salt thereof is more preferable.
- the dose can be administered in terms of the body weight per 60 kg, and the dose can be appropriately increased or decreased according to the sustained release period.
- the formulation combining the short-term sustained-release microcapsules and the long-term sustained-release microcapsules, which is useful in the present invention, is obtained by converting the above-mentioned GnRH agonist dose from the sustained-release period of the long-term sustained-release microcapsules. And it can be administered by dispensing into long-term sustained release microcapsules.
- DCC N, N, 1-dicyclohexinorecanololebodiimide
- this WZO emulsion After cooling this WZO emulsion to about 19 ° C, it is poured into 200 L of 0.1% (w / w) aqueous solution of polybutyl alcohol (EG-40, manufactured by Nippon Synthetic Chemical), which has been adjusted to about 19 ° C in advance.
- the mixture was emulsified and stirred at about 7000 rpm using HOMOMIC LINE FLOW (manufactured by Tokushu Kika) to obtain a WZOZW emulsion.
- This WZOZW emulsion was stirred at room temperature under the conditions of about 2500 rpm for 3 hours to evaporate dichloromethane, and then diffused into the external aqueous phase to solidify the oil phase.
- microcapsules After sieving using a sieve having a mesh opening of 75 m, the microcapsules were continuously sedimented with a centrifuge at about 2,000 rpm and collected. The collected micro forceps were dispersed in a small amount of distilled water, sieved with a sieve having an opening of 90 m, and 174.5 g of mannitol was dissolved in kagami. This was freeze-dried to obtain a microcapsule powder (hereinafter, MC # 1). The peptide A content was 8.5%.
- microcapsules After sieving using a sieve having a mesh opening of 75 m, the microcapsules were continuously sedimented with a centrifuge at approximately 2,000 rpm and collected. Disperse the collected microcapsules in a small amount of distilled water, and sieve with a 90 m mesh Then, 169.7 g of mannitol was added and dissolved. This was freeze-dried to obtain a microcapsule powder (hereinafter, MC # 2). The peptide A content was 7.5%.
- MC # 2 The peptide A content was 7.5%.
- this WZO emulsion After cooling this WZO emulsion to about 15 ° C, it was adjusted to about 15 ° C in advance and added to 200 L of a 0.1% (w / w) aqueous solution of polyvinyl alcohol (EG-40, manufactured by Nippon Synthetic Chemical). The mixture was injected and stirred and emulsified at about 7,000 rpm using a HOMOMIC LINE FLOW (manufactured by Tokushu Kika) to obtain a WZOZW emulsion. The WZO / W emulsion was stirred at room temperature at about 2500 rpm for 3 hours to evaporate dichloromethane or diffuse it into the external water phase to solidify the oil phase.
- EG-40 polyvinyl alcohol
- microcapsules After sieving using a sieve having a mesh opening of 75 m, the microcapsules were continuously sedimented with a centrifuge at about 2,000 rpm and collected. The collected microcapsules were dispersed in a small amount of distilled water, sieved with a sieve having an opening of 90 m, and 130 g of mann-toll was dissolved in syrup. This was freeze-dried under secondary drying conditions at 50 ° C for 48 hours to obtain microcapsule powder (hereinafter, MC # 3). The peptide A content was 7.8%.
- this WZO emulsion After cooling this WZO emulsion to about 16 ° C, it is poured into 25 L of a 0.1% (w / w) aqueous solution of polyvinyl alcohol (EG-40, manufactured by Nippon Synthetic Chemical Industry) that has been adjusted to about 16 ° C in advance. It was emulsified by stirring at about 7000 rpm using HOMOM IC LINE FLOW (manufactured by Tokushu Kika) to obtain a WZOZW emulsion. This WZOZW emulsion was stirred at room temperature under the condition of about 2000 rpm for 3 hours to evaporate dichloromethane, and then diffused into the external aqueous phase to solidify the oil phase.
- EG-40 polyvinyl alcohol
- HOMOM IC LINE FLOW manufactured by Tokushu Kika
- Detector Differential refractometer (having the same performance as HLC-8120GPC system) Column: TSK guardcolumn H — L (40x6. Omm i. D.)
- the resolution between the peak of F-10 and the peak of F-2 is 2.0 or more, and the theoretical plate number and symmetry coefficient of both peaks are 8000 respectively. Not less than 1.5 and less than 1.5.
- Standard solution Stable at room temperature (about 25 ° C) for at least 24 hours after preparation.
- Sample solution Stable at room temperature (about 25 ° C) for at least 24 hours after preparation.
- the number average molecular weight [ ⁇ ⁇ ⁇ / ⁇ (HiZMi)] is also measured.
- Polystyrene standard TSK standard polystyrene Z manufactured by Tosoh Corporation
- microcapsules that slowly release GnRH agonists or their salts with different sustained release periods, the amount of drug released at the initial stage of administration is increased, and a sustained release that releases a constant amount of drug over a long period of time.
- a preparation having excellent properties can be obtained.
- FIG. 1 is a diagram showing the results of Test Example 1. Reference indicates the blood concentration of peptide A when Combo B was administered, and ⁇ indicates the blood concentration of peptide A when MC # 2 was administered.
- FIG. 2 is a view showing the results of Test Example 2. Reference indicates the blood concentration of peptide A when Combo A was administered, and ⁇ indicates the blood concentration of peptide A when MC # 2 was administered.
- FIG. 3 is a view showing the results of Test Example 3.
- the reference indicates the blood concentration of peptide A when Combo D was administered, and the open triangle indicates the blood concentration of peptide A when MC # 2 was administered.
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Abstract
Description
Claims
Priority Applications (6)
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US10/530,186 US7662408B2 (en) | 2004-02-10 | 2005-02-09 | Sustained-release preparations |
KR1020067016167A KR101162526B1 (ko) | 2004-02-10 | 2005-02-09 | 서방성 제제 |
EP05709974A EP1714643A4 (en) | 2004-02-10 | 2005-02-09 | PREPARATION WITH DELAYED RELEASE |
CA002554262A CA2554262A1 (en) | 2004-02-10 | 2005-02-09 | Sustained-release preparations |
BRPI0507530-0A BRPI0507530A (pt) | 2004-02-10 | 2005-02-09 | preparação para liberação prolongada, agente para evitar ou tratar doença, processo para produzir a preparação para liberação prolongada, método para evitar ou tratar doença, e, uso da preparação para liberação prolongada |
JP2005517805A JP4966545B2 (ja) | 2004-02-10 | 2005-02-09 | 徐放性製剤 |
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JP2004-034180 | 2004-02-10 | ||
JP2004034180 | 2004-02-10 |
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WO2005074896A1 true WO2005074896A1 (ja) | 2005-08-18 |
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US (1) | US7662408B2 (ja) |
EP (1) | EP1714643A4 (ja) |
JP (1) | JP4966545B2 (ja) |
KR (1) | KR101162526B1 (ja) |
CN (1) | CN1938008A (ja) |
BR (1) | BRPI0507530A (ja) |
CA (1) | CA2554262A1 (ja) |
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JP2013530926A (ja) * | 2010-06-25 | 2013-08-01 | 武田薬品工業株式会社 | 徐放性製剤 |
KR20140086741A (ko) | 2012-12-28 | 2014-07-08 | 주식회사 종근당 | GnRH 유도체의 서방성 지질 초기제제 및 이를 포함하는 약제학적 조성물 |
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- 2005-02-09 US US10/530,186 patent/US7662408B2/en active Active
- 2005-02-09 CN CNA2005800103825A patent/CN1938008A/zh active Pending
- 2005-02-09 JP JP2005517805A patent/JP4966545B2/ja active Active
- 2005-02-09 EP EP05709974A patent/EP1714643A4/en not_active Ceased
- 2005-02-09 BR BRPI0507530-0A patent/BRPI0507530A/pt not_active IP Right Cessation
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JP2008505057A (ja) * | 2004-07-02 | 2008-02-21 | 武田薬品工業株式会社 | 徐放性組成物、その製造法および用途 |
JP2013530926A (ja) * | 2010-06-25 | 2013-08-01 | 武田薬品工業株式会社 | 徐放性製剤 |
KR20140086741A (ko) | 2012-12-28 | 2014-07-08 | 주식회사 종근당 | GnRH 유도체의 서방성 지질 초기제제 및 이를 포함하는 약제학적 조성물 |
US10722585B2 (en) | 2012-12-28 | 2020-07-28 | Chong Kun Dang Pharmaceutical Corp. | Sustained-release lipid pre-concentrate of GNRH analogues and pharmaceutical composition comprising the same |
JP2021524496A (ja) * | 2019-03-26 | 2021-09-13 | ノベルファーマ株式会社Novel Pharma Inc. | 持続型脂肪酸結合GnRH誘導体及びこれを含む薬剤学的組成物 |
JP7066913B2 (ja) | 2019-03-26 | 2022-05-13 | ノベルファーマ株式会社 | 持続型脂肪酸結合GnRH誘導体及びこれを含む薬剤学的組成物 |
US11975048B2 (en) | 2019-03-26 | 2024-05-07 | Novel Pharma Inc. | Long-acting fatty acid-conjugated GnRH derivatives and pharmaceutical compositions containing same |
KR20220002140A (ko) | 2020-06-30 | 2022-01-06 | 주식회사 종근당 | GnRH 유도체를 포함하는 주사용 조성물 |
WO2022005169A1 (ko) | 2020-06-30 | 2022-01-06 | 주식회사 종근당 | Gnrh 유도체를 포함하는 주사용 조성물 |
Also Published As
Publication number | Publication date |
---|---|
EP1714643A1 (en) | 2006-10-25 |
US20060074027A1 (en) | 2006-04-06 |
BRPI0507530A (pt) | 2007-07-03 |
JPWO2005074896A1 (ja) | 2007-10-11 |
JP4966545B2 (ja) | 2012-07-04 |
US7662408B2 (en) | 2010-02-16 |
KR20060129015A (ko) | 2006-12-14 |
CN1938008A (zh) | 2007-03-28 |
CA2554262A1 (en) | 2005-08-18 |
EP1714643A4 (en) | 2011-03-02 |
KR101162526B1 (ko) | 2012-07-09 |
TW200529890A (en) | 2005-09-16 |
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