WO2014042250A1 - Drug-containing ultrafine fiber and utilization thereof - Google Patents
Drug-containing ultrafine fiber and utilization thereof Download PDFInfo
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- WO2014042250A1 WO2014042250A1 PCT/JP2013/074873 JP2013074873W WO2014042250A1 WO 2014042250 A1 WO2014042250 A1 WO 2014042250A1 JP 2013074873 W JP2013074873 W JP 2013074873W WO 2014042250 A1 WO2014042250 A1 WO 2014042250A1
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- drug
- ultrafine fiber
- containing ultrafine
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- laminate
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/13—Amines
- A61K31/135—Amines having aromatic rings, e.g. ketamine, nortriptyline
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/16—Amides, e.g. hydroxamic acids
- A61K31/165—Amides, e.g. hydroxamic acids having aromatic rings, e.g. colchicine, atenolol, progabide
- A61K31/167—Amides, e.g. hydroxamic acids having aromatic rings, e.g. colchicine, atenolol, progabide having the nitrogen of a carboxamide group directly attached to the aromatic ring, e.g. lidocaine, paracetamol
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- A—HUMAN NECESSITIES
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
- A61K31/19—Carboxylic acids, e.g. valproic acid
- A61K31/192—Carboxylic acids, e.g. valproic acid having aromatic groups, e.g. sulindac, 2-aryl-propionic acids, ethacrynic acid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
- A61K31/19—Carboxylic acids, e.g. valproic acid
- A61K31/195—Carboxylic acids, e.g. valproic acid having an amino group
- A61K31/196—Carboxylic acids, e.g. valproic acid having an amino group the amino group being directly attached to a ring, e.g. anthranilic acid, mefenamic acid, diclofenac, chlorambucil
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- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/35—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
- A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline
- A61K31/353—3,4-Dihydrobenzopyrans, e.g. chroman, catechin
- A61K31/355—Tocopherols, e.g. vitamin E
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- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
- A61K31/403—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil condensed with carbocyclic rings, e.g. carbazole
- A61K31/404—Indoles, e.g. pindolol
- A61K31/405—Indole-alkanecarboxylic acids; Derivatives thereof, e.g. tryptophan, indomethacin
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- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
- A61K31/4402—Non condensed pyridines; Hydrogenated derivatives thereof only substituted in position 2, e.g. pheniramine, bisacodyl
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- A61K9/70—Web, sheet or filament bases ; Films; Fibres of the matrix type containing drug
- A61K9/7007—Drug-containing films, membranes or sheets
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
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- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
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- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/44—Medicaments
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- 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
- A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
- A61K47/14—Esters of carboxylic acids, e.g. fatty acid monoglycerides, medium-chain triglycerides, parabens or PEG fatty acid esters
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- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/16—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing nitrogen, e.g. nitro-, nitroso-, azo-compounds, nitriles, cyanates
- A61K47/18—Amines; Amides; Ureas; Quaternary ammonium compounds; Amino acids; Oligopeptides having up to five amino acids
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- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/32—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. carbomers, poly(meth)acrylates, or polyvinyl pyrrolidone
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- 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
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- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/42—Proteins; Polypeptides; Degradation products thereof; Derivatives thereof, e.g. albumin, gelatin or zein
Definitions
- the present invention relates to a drug-containing ultrafine fiber, a drug-containing ultrafine fiber laminate obtained by laminating the drug-containing ultrafine fiber, and a skin application agent using the same.
- Transdermal absorption an alternative route of oral administration, avoids the first-pass effect of the drug in the liver, and the rate of absorption of the drug is slower than oral administration. It is known that the concentration does not increase easily, and side effects and toxicity associated therewith can be avoided. Furthermore, since the drug can be supplied continuously and the plasma concentration can be kept constant for a long time, it is possible to reduce the number of doses as a preparation once a day to once a few days, etc., and it is difficult to swallow. Because it is easy for the elderly and pediatric patients to take medication, and it is easy to check their medication status and discontinue their medication, improvement of medication compliance is also expected.
- transdermal absorption preparations intended to administer drugs to the body through the skin by applying to the skin have been developed in various forms such as poultices and plasters, and generally contain drugs
- the adhesive layer is formed by laminating the adhesive layer on the support, and there are a wide variety of drugs such as local acting drugs such as anti-inflammatory analgesics and systemic acting drugs such as vasodilators.
- the affixed part is the skin surface, there is no sense of incongruity when affixed, and it is necessary to follow the movement of the skin, and the support base material is a flexible material such as a plastic film. Nonwoven fabrics and woven fabrics are used.
- a material having elasticity as well as flexibility is used for a part where the affixed part is a bent part such as an elbow knee joint part.
- Processes associated with the skin permeation of this drug include (1) distribution of the drug from the preparation to the skin (skin transferability) and (2) transfer to the systemic circulation by diffusion from within the skin (intradermal diffusion). It is done.
- Patent Document 1 describes a film-form preparation containing chitosan nanofiber and a drug.
- chitosan which is essentially fibrous is repeatedly subjected to high-pressure jet treatment to relieve entanglement of the fiber, thereby forming a film, and the drug is formed on the fiber surface and in the voids in the film. Is retained. For this reason, in particular, when used as a skin application agent, questions remain regarding the release rate and release controllability.
- an object of the present invention is to provide a new formulation technology that does not interfere with the diffusion of the drug contained in the formulation and has high drug availability.
- the present inventors have included a drug in the ultrafine fiber obtained after spinning by including a drug in the spinning solution used when spinning the ultrafine fiber. And the present invention has been completed by finding that the drug availability is high when the drug is released.
- the present invention is a drug-containing ultrafine fiber characterized in that a drug is contained in the ultrafine fiber.
- the present invention also provides a drug-containing ultrafine fiber laminate characterized by laminating the above-mentioned drug-containing ultrafine fibers and a skin application agent characterized by containing the same.
- the present invention is a method for producing a drug-containing ultrafine fiber characterized by spinning a spinning solution obtained by mixing a drug and a spinnable base.
- the present invention is a method for producing a drug-containing ultrafine fiber laminate, wherein a spinning solution obtained by mixing a drug and a spinnable base material is laminated while spinning.
- the drug-containing ultrafine fiber of the present invention and the drug-containing superfine fiber laminate obtained by laminating the drug-containing ultrafine fiber have high drug utilization and have a practical level of stability because the drug is contained in the ultrafine fiber. It is.
- the drug-containing ultrafine fiber and the drug-containing ultrafine fiber laminate of the present invention can be suitably used for a skin application agent such as a damaged skin coating agent or a transdermal absorption preparation, and its drug utilization is high.
- a skin application agent such as a damaged skin coating agent or a transdermal absorption preparation
- the formulation can be reduced in weight and thinned.
- the outline of the apparatus which implements the electrospinning method used when manufacturing the super extra fine fiber laminated body of this invention is shown. It is an electron micrograph of the diphenhydramine hydrochloride containing super extra fine fiber laminated body manufactured in Example 1 (in the figure, 10%, 30%, 50% respectively show the diphenhydramine concentration in the ultra extra fine fiber). It is an electron micrograph of the lidocaine hydrochloride containing super extra fine fiber laminated body manufactured in Example 1 (in the figure, 10%, 30%, 50% respectively show the lidocaine concentration in a super extra fine fiber).
- the drug-containing ultrafine fiber of the present invention (hereinafter sometimes referred to as “the fiber of the present invention”) is obtained by containing a drug in the ultrafine fiber. Since the fiber of the present invention spins together a spinnable base and a drug as will be described later, the drug is dispersed in the ultrafine fiber. Therefore, the drug exists on both the surface and the inside of the ultrafine fiber.
- the “ultrafine fiber” is a nanofiber having a nano-order or micro-order diameter, or a microfiber such as a microfiber.
- the diameter of a single fiber is 1 nm to 10 ⁇ m, preferably It is 1 to 2000 nm, more preferably 5 to 1000 nm, and particularly preferably 10 to 700 nm.
- the length is at least 10 times the diameter, preferably 100 times or more, more preferably 1000 times or more. If the fiber diameter is set to be thick, the drug release time becomes long. Conversely, if the fiber diameter is set to be thin, the release time can be shortened, so that the drug release can be controlled.
- the present fiber is mainly composed of a spinnable base.
- the spinnable base is not particularly limited as long as it is fiber-forming and can spin ultrafine fibers.
- polylactic acid-based aliphatic polyester, polycaprolactone-based aliphatic polyester, microorganism-produced fat Nylon 6, Nylon 11 and Nylon 12 obtained by polycondensation or co-condensation polymerization of aliphatic polyesters such as aliphatic polyesters, polyhydroxyalkanoates and polybutylene succinates, aminocarboxylic acids, lactams, diamines and dicarboxylic acids , Nylon 66, Nylon 610, Nylon 46, Nylon 6T, Nylon 6I, Nylon 9T, Nylon M5T, Nylon 612, etc., para-type wholly aromatic polyamide obtained by copolymerizing aromatic diamine and dicarboxylic acid, meta-type Polyamide resins such as wholly aromatic polyamides, Polyurethane resins such as tellurium poly
- Nonionic synthetic polymers such as ionic synthetic polymers, polyvinyl alcohol, polyvinylpyrrolidone, polyethylene oxide, gum arabic, tragacanth gum, locust bean gum, guar gum, echo gum, caraya gum, agar, starch, carrageenan Alginic acid, alginate, propylene glycol alginate, dextran, dextrin, amylose, gelatin, collagen, pullulan, pectin, amylopectin, starch, chitin, chitosan, albumin, casein, methylcellulose, ethylcellulose, propylcellulose, ethylmethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose , Natural resins such as hydroxypropylmethylcellulose and hydroxypropyl starch, and semi-synthetic resins.
- these bases are preferable. Moreover, these bases can use 1 type (s) or 2 or more types. Further, the content of these bases in the fiber of the present invention is not particularly limited, but is, for example, 50 to 99.9% by mass (hereinafter simply referred to as “%”), preferably 70 to 99%.
- the drug contained in the fiber of the present invention is not particularly limited, and examples thereof include a drug that is absorbed into the living body percutaneously, a drug for treating damaged skin, and a treatment for acne.
- Such drugs include hydrocortisone, prednisolone, parameterzone, beclomethasone dipropionate, flumetasone, betamethasone, betamethasone valerate, dexamethasone, triamcinolone, triamcinolone acetonide, fluocinolone, fluocinolone acetonide, fluocinolone acetonide acetate, Corticosteroids such as clobetasol propionate, indomethacin, ketoprofen, acetaminophen, mefenamic acid, flufenamic acid, diclofenac or its salts, alclofenac, oxyphenbutazone, phenylbutazone, ibuprofen, flurbiprofen, salicylic
- ⁇ Acne therapeutic agent fentanyl, desmopressin, digoxin
- examples include 5-fluorouracil, mercaptopurine, and nicotine.
- indomethacin, felbinac, loxoprofen or a salt thereof, chlorpheniramine or a salt thereof, diphenhydramine or a salt thereof, lidocaine or a salt thereof, ethyl aminobenzoate, tranilast, glycyrrhetinic acid and tocopherol acetate are preferable.
- These drugs can be used alone or in combination of two or more depending on the purpose and action of treatment.
- the content of these drugs in the fiber of the present invention is not particularly limited, but is, for example, 0.001 to 50%, preferably 0.01 to 30%.
- the fiber of the present invention can contain a percutaneous absorption enhancer for promoting percutaneous absorption of the drug.
- a percutaneous absorption enhancer is not particularly limited, for example, alcohols such as oleyl alcohol, polyoxyethylene oleyl ether, polyethylene glycol monooleate, esters or ethers, sorbitan esters such as sorbitan monolaurate, sorbitan monooleate, etc.
- ionic surfactants such as ethers, phenol ethers such as polyoxyethylene nonylphenyl ether and polyoxyethylene octylphenyl ether, dioctylsodium sulfosuccinate, oleoyl sarcosine, betaine lauryldimethylaminoacetate, sodium lauryl sulfate , N-alkyl glucoside, n-alkyl thioglucoside, polyoxyethylene lauryl ether, dimethyl lauryl amine oxide, etc.
- Alkylmethyl sulfoxides such as dimethyl sulfoxide and decylmethyl sulfoxide
- pyrrolidones such as 2-pyrrolidone, 1-methyl-2-pyrrolidone and dodecylpyrrolidone, 1-dodecylazacycloheptan-2-one, 1- And azacycloalkanes such as geranylazacycloheptan-2-one
- amines such as diisopropanolamine, triisopropanolamine, monoethanolamine, diethanolamine, and triethylamine
- terpenes such as L-menthol and cineol.
- transdermal absorption enhancers crotamiton, diisopropyl adipate, L-menthol, propylene glycol monocaprylate and propylene glycol dicaprylate are preferred.
- These percutaneous absorption enhancers can be used alone or in combination of two or more. Further, the content of these percutaneous absorption enhancers in the fiber of the present invention is not particularly limited, but is, for example, 0.001 to 50%, preferably 0.01 to 30%.
- the fiber of the present invention may contain other components such as known plasticizers and antioxidants that can be added to the ultrafine fiber as long as the effects of the present invention are not impaired.
- the fiber of the present invention can be prepared using a combination of various bases, drugs, and percutaneous absorption enhancers.
- the base is a polyurethane resin
- the drug is indomethacin
- the percutaneous absorption enhancer Is a combination in which is one or more selected from crotamiton, propylene glycol dicaprylate, and propylene glycol monocaprylate.
- the above-described fiber of the present invention comprises a spinning solution obtained by mixing a drug and a spinnable base, and if necessary, a percutaneous absorption accelerator and other components under conditions suitable for spinning the base. It can be obtained by spinning.
- the spinning solution may be prepared, for example, by stirring and mixing a drug, and if necessary, a percutaneous absorption enhancer and other components in a spinnable base appropriately diluted with water or an organic solvent. It is more preferable that water or an organic solvent can dissolve the base, the drug, and the transdermal absorption enhancer. However, since these solvents are instantly volatilized by heating during spinning, they are hardly present in the fiber of the present invention.
- the organic solvent used is not particularly limited, but methanol, ethanol, acetonitrile, propanol, isopropanol, toluene, cyclohexane, tetrahydrofuran, dimethyl sulfoxide, methylene chloride, chloroform, carbon tetrachloride, 1,4-dioxane, pyridine, Trichloroethane, N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, ethylene carbonate, diethyl carbonate, propylene carbonate, methyl ethyl ketone, benzyl alcohol, phenol, methyl isobutyl ketone, methyl hexyl ketone, methyl propyl Ketone, diisopropyl ketone, diisobutyl ketone and the like can be mentioned.
- the spinning method described above is not particularly limited as long as it can spin ultrafine fibers such as nanofibers and microfibers.
- electrospinning electrospinning
- composite melt spinning melt blowing
- Law electrospinning
- the electrospinning method or the melt blowing method is preferable, and the electrospinning method is more preferable.
- Sato et al.'S “Technology for producing nanofibers by electrospinning” http://www.aichi-inst.jp/mikawa/research/report/mikawa_2006_02.pdf Since it is explained in detail in the literature, this description may be referred to.
- the conditions for spinning the spinning solution are not particularly limited, and the usual conditions of the above method may be followed.
- an oriented fiber of the present invention can be obtained by using a disk collector or a drum collector, and an unoriented fiber of the present invention can be obtained by using a plate collector. it can.
- the ultrafine fiber laminate of the present invention (hereinafter sometimes simply referred to as “the laminate of the present invention”) is obtained by laminating the present fiber while spinning the spinning solution as described above.
- the lamination method is not particularly limited as long as one or a plurality of the fibers of the present invention can be stacked to form a layer having voids.
- the above-described disk collector or drum collector is used.
- the thickness of the laminate of the present invention can be appropriately adjusted by the speed of rotation, reciprocation, etc. of the disk collector, drum collector, etc.
- the content of the drug in the laminate of the present invention can be appropriately adjusted depending on production conditions and the like, and is not particularly limited. For example, 0.0001 to 0.5 g per 1 g of the laminate of the present invention, preferably 0.0001. ⁇ 0.3g.
- the content of the drug in the laminate of the present invention is derived from the fiber of the present invention constituting this, and the content when a drug or the like is separately injected and supported in the voids of the laminate of the present invention. Absent.
- An ultrafine fiber manufacturing apparatus 1 shown in FIG. 1 includes a spinning solution tank 2, a nozzle 3, a high voltage power supply 4, a rotatable collector 5, and a conductive thin film 6.
- the positive electrode of the high voltage power supply 4 is connected to the nozzle 3, and the negative electrode is connected to the conductive thin film 6 attached to the surface of the collector 5.
- the collector 5 rotates on an axis perpendicular to the nozzle 3.
- a spinning solution containing a drug and a spinnable base is prepared by mixing and stirring, and this is filled in the spinning solution tank 2.
- the collector 5 with the conductive thin film 6 attached to the surface is rotated, and the spinning solution is pushed out to the extent that the high voltage power source 4 does not drip from the tip of the nozzle 3 to which a positive voltage is applied.
- the spinning solution 7 having a positive charge is attracted to the conductive thin film 6 having a negative charge on the conductive thin film 6 to which a negative voltage is applied by the high-voltage power source 4, so that the drug-containing ultrafine fiber 8 is formed.
- a drug-containing ultrafine fiber laminate 9 is obtained.
- the preferable production conditions for the drug-containing ultrafine fiber laminate in this apparatus are as follows.
- the above-described fibers of the present invention and laminates thereof are excellent in plasticity and have high drug availability, so that it is possible to reduce the weight and thickness compared to conventional drug layers.
- These fibers and laminates thereof can be used for, for example, a skin application agent, particularly a damaged skin coating agent, a transdermal absorption preparation, and the like, and among these, it is preferable to use the transdermal absorption preparation.
- a transdermally absorbable preparation using the fiber of the present invention or a laminate thereof can be obtained by using the fiber of the present invention or a laminate thereof, preferably the laminate of the present invention, instead of a conventionally known drug layer.
- a specific embodiment of the transdermally absorbable preparation for example, in order from the skin application surface, the laminate of the present invention, a drug-impermeable layer, an adhesive layer are provided, and further, if necessary, to protect the laminate of the present invention.
- the thing which provided the protective layer is mentioned.
- the material of the drug-impermeable layer and the protective layer is not particularly limited, and examples thereof include a plastic film and an aluminum foil.
- examples of the adhesive layer include a plastic film having a size relatively larger than that of the laminate of the present invention, and an aluminum foil coated with a paste or an adhesive.
- a drug is applied to the paste or the adhesive. It is preferable to use one that does not contain.
- the percutaneously absorbable preparation thus obtained has a high drug availability and can be easily formed into various shapes because the drug layer is thin.
- Reference example 1 Manufacture of ultra-fine fiber laminates: The production of a superfine fiber laminate is performed by using a spinning solution containing a spinnable base shown in Table 1 below, and an electrospinning method using the superfine fiber production apparatus 1 shown in FIG. 1 and the following conditions. I went there.
- a spinning solution having the composition shown in Table 1 below was prepared, and this was filled in the spinning solution tank 2.
- the collector 5 with the conductive thin film 6 attached on the surface was rotated, and the spinning solution was pushed out to the extent that the positive voltage was not applied from the tip of the nozzle 3 to which the positive voltage was applied.
- the spinning solution 7 having a positive charge is attracted to the conductive thin film 6 having a negative charge, and the ultrafine fiber is laminated. This was peeled off to obtain an ultrafine fiber laminate.
- the appearance of the obtained super extra fine fiber laminate was observed with an electron microscope and evaluated according to the following appearance evaluation criteria 1. The results are also shown in Table 1.
- a laminate of ultrafine fibers can be produced using any of water-soluble base gelatin and polyvinyl alcohol and hydrophobic base polyurethane.
- Example 1 Production of drug-containing ultrafine fiber laminate: A spinning solution was prepared in which an aqueous gelatin solution (gelatin 30% and water 70%) contained the drugs shown in Table 2 below so that the drug concentration in the ultrafine fiber was the amount shown in Table 2. A drug-containing ultrafine fiber laminate was produced in the same manner as in Reference Example 1 except that this spinning solution was used. The appearance of the obtained drug-containing ultrafine fiber laminate was observed with an electron microscope and evaluated according to the following appearance evaluation criteria 2. The results are also shown in Table 2. In addition, electron micrographs of these drug-containing ultrafine fiber laminates are shown in FIGS.
- an aqueous gelatin solution gelatin 30% and water 70%
- the drug-containing ultrafine fibers constituting the drug-containing ultrafine fiber laminate have an average fiber diameter of about 100 to about 300 nm and a length of 1000 times the diameter or more according to measurement in an electron micrograph. there were.
- Example 2 Production of drug-containing ultrafine fiber laminate: In the polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%), the drugs shown in the following Table 3 have a drug concentration in the ultrafine fiber of 10% (some 30%) A spinning solution was prepared so that Using this spinning solution, a drug-containing ultrafine fiber laminate was produced in the same manner as in Reference Example 1. Immediately after the production of the obtained drug-containing ultrafine fiber laminate, the appearance after 60 ° C. for 3 days and after 60 ° C. for 5 days was observed with an electron microscope, evaluated according to the following appearance criteria 3, and further based on each evaluation below. Overall judgment was made according to the criteria of The results are also shown in Table 3.
- Example 3 Production of drug-containing ultrafine fiber laminate: In a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%), the drug described in Table 4 below was contained so that the drug concentration in the ultrafine fiber was 10%. Furthermore, a spinning solution was prepared containing crotamiton as a transdermal absorption enhancer so that the concentration of the transdermal absorption enhancer in the ultrafine fiber was 2%, 5% or 10%. Using this spinning solution, a drug-containing ultrafine fiber laminate was produced in the same manner as in Reference Example 1. The obtained drug-containing ultrafine fiber laminate was comprehensively determined in the same manner as in Example 2. The results are also shown in Table 4.
- Example 4 Production of drug-containing ultrafine fiber laminate: In Example 3, a drug-containing ultrafine fiber laminate was produced and comprehensively determined in the same manner as in Example 3 except that the transdermal absorption enhancer was changed from crotamiton to diisopropyl adipate. The results are shown in Table 5.
- Example 5 Production of drug-containing ultrafine fiber laminate: In Example 3, a drug-containing ultrafine fiber laminate was produced and comprehensively determined in the same manner as in Example 3 except that the transdermal absorption enhancer was changed from crotamiton to L-menthol. The results are shown in Table 6.
- Example 6 Production of drug-containing ultrafine fiber laminate: In Example 3, a drug-containing ultrafine fiber laminate was produced and comprehensively evaluated in the same manner as in Example 3 except that the transdermal absorption accelerator was changed from crotamiton to propylene glycol monocaprylate. The results are shown in Table 7.
- Example 7 Production of drug-containing ultrafine fiber laminate: In Example 3, a drug-containing ultrafine fiber laminate was produced and comprehensively evaluated in the same manner as in Example 3 except that the transdermal absorption accelerator was changed from crotamiton to propylene glycol dicaprylate. The results are shown in Table 8.
- Example 8 Release test (1) Indomethacin-containing superfine fiber laminate A polyurethane resin solution (polyurethane resin 14%, methylethylketone 23% and N, N-dimethylformamide 63%) is mixed with the amount of indomethacin in the ultrafine fiber as shown in Table 9. A spinning solution was prepared in such a manner. Using these spinning solutions, indomethacin-containing ultrafine fiber laminates were produced in the same manner as in Reference Example 1. These indomethacin-containing super extra fine fiber laminates were cut into a circular shape with a diameter of 60 mm to make test pieces. The test piece was sandwiched between transdermal sandwiches, and the four places were clipped.
- polyurethane resin solution polyurethane resin 14%, methylethylketone 23% and N, N-dimethylformamide 63%) is mixed with the amount of indomethacin in the ultrafine fiber as shown in Table 9.
- a spinning solution was prepared in such a manner. Using these spinning solutions
- the test was conducted at 50 rpm per second by the second method of the dissolution test method which is a general test method of the Japanese Pharmacopoeia (however, the temperature of the test solution was 32 ⁇ 0.5 ° C.
- the position of the paddle was adjusted so that the distance between the lower end of the paddle and the specimen release surface was 25 ⁇ 2 mm.
- 10 mL of the test solution previously heated to 32 ⁇ 0.5 ° C. was immediately added.
- the filtrate obtained by filtering the collected release liquid with a membrane filter having a pore size of 0.5 ⁇ m or less was used as a sample solution.
- the amount of indomethacin released in this sample solution was determined using liquid chromatography.
- the amount of indomethacin contained in the test piece was determined by liquid chromatography using a sample solution obtained by cutting the test piece into small pieces and adding an appropriate amount of methanol to the sample piece. Using these values, the indomethacin release rate (%) was determined by the following formula. This is also shown in Table 9.
- the release rate of the indomethacin-containing ultrafine fiber laminate is at least 19% after 6 hours, whereas the release rate of the commercially available product is 14% after 6 hours even if the release rate is the best. It was the following. Moreover, the indomethacin-containing ultrafine fiber laminate had a high release rate of 9% or more after 1 hour.
- Example 9 Release test A spinning solution was prepared by containing diphenhydramine in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber was as shown in Table 11. did.
- a diphenhydramine-containing ultrafine fiber laminate was produced in the same manner as in Reference Example 1.
- These diphenhydramine-containing ultrafine fiber laminates were subjected to a release test in the same manner as in Example 8 to obtain the diphenhydramine release rate (%). These results are shown together in Table 11.
- the amount of diphenhydramine contained in the test piece was determined by liquid chromatography using a sample solution obtained by adding an appropriate amount of methanol to the test piece after finely cutting the test piece.
- diphenhydramine-containing ultrafine fiber laminate had a high release rate of 100% or more after 1 hour. Therefore, it was suggested that diphenhydramine-containing ultrafine fiber laminates could be used for immediate-acting preparations.
- Example 10 Release test A spinning solution was prepared by containing lidocaine in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber was as shown in Table 12. did. Lidocaine-containing ultrafine fiber laminates were produced in the same manner as in Reference Example 1 using these spinning solutions. These lidocaine-containing ultrafine fiber laminates were subjected to a release test in the same manner as in Example 8 to obtain the lidocaine release rate (%). These results are shown together in Table 12. The amount of lidocaine contained in the test piece was obtained by liquid chromatography using a sample solution obtained by adding an appropriate amount of methanol to the test piece after finely cutting the test piece.
- lidocaine-containing ultrafine fiber laminate had a high release rate of 100% or more after 1 hour. Therefore, it was suggested that lidocaine-containing ultrafine fiber laminates could be used for immediate-acting preparations.
- Example 11 Release test Indomethacin is added to a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber becomes 10%, and further, as a percutaneous absorption accelerator. Crotamiton, diisopropyl adipate, L-menthol, propylene glycol monocaprylate or propylene glycol dicaprylate are added so that the concentration of the percutaneous absorption enhancer in the ultrafine fiber is 0%, 2%, 5% or 10%. A spinning solution was prepared. Using this spinning solution, a drug-containing ultrafine fiber was produced in the same manner as in Reference Example 1. These drug-containing superfine fiber laminates were subjected to a release test in the same manner as in Example 8 to determine the indomethacin release rate (%). The results are shown in Tables 13-17.
- any of the percutaneous absorption enhancers can increase the release of indomethacin, and in particular, propylene glycol dicaprylate significantly increases the release of indomethacin.
- Example 12 Release test Diphenhydramine is contained in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber is 10%, and further, as a transdermal absorption accelerator. Spinning containing crotamiton, diisopropyl adipate, L-menthol, propylene glycol monocaprylate or propylene glycol dicaprylate so that their concentration in the ultrafine fiber is 0%, 2%, 5% or 10% A solution was prepared. Using this spinning solution, a drug-containing ultrafine fiber was produced in the same manner as in Reference Example 1.
- Example 13 Release test Lidocaine is contained in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber becomes 10%, and as a percutaneous absorption accelerator. Spinning containing crotamiton, diisopropyl adipate, L-menthol, propylene glycol monocaprylate or propylene glycol dicaprylate so that their concentration in the ultrafine fiber is 0%, 2%, 5% or 10% A solution was prepared. Using this spinning solution, a drug-containing ultrafine fiber was produced in the same manner as in Reference Example 1.
- Example 14 Skin permeation test: (1) Manufacture of indomethacin-containing super extra fine fiber laminate A concentration of indomethacin in the extra fine fiber is 10% in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%). In addition, a spinning solution containing a percutaneous absorption enhancer was added so that the concentration in the ultrafine fiber was as shown in Table 28 was prepared. Using these spinning solutions, indomethacin-containing ultrafine fiber laminates were produced in the same manner as in Reference Example 1.
- Detector UV absorptiometer (measurement wavelength: 320 nm)
- Column A stainless steel tube having an inner diameter of 4.6 mm and a length of 15 cm was packed with 5 ⁇ m of octadecylsilylated silica gel for liquid chromatography.
- Column temperature constant temperature around 40 ° C.
- Mobile phase acetonitrile / 0.1 mol / L acetic acid mixture (3: 2)
- Flow rate 1.000 mL / min
- Injection volume 80 ⁇ L
- the cumulative transmittance of the indomethacin-containing ultrafine fiber laminate is at least 30% after 24 hours, whereas the commercial product has the best cumulative transmittance after 24 hours. It was 6% or less. It has been found that a cumulative transmittance higher than that of a commercially available preparation can be obtained by using a superfine fiber laminate.
- Example 15 Production of topical skin preparation: A spinning solution is prepared by containing indomethacin in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber becomes 10%. Using this spinning solution, an indomethacin-containing ultrafine fiber laminate is produced in the same manner as in Reference Example 1. This indomethacin-containing ultrafine fiber laminate is cut into a size of 5 cm ⁇ 5 cm. Next, this is pasted in the middle of a 6 cm ⁇ 6 cm plastic film coated with an adhesive, and finally a protective film having the same size as the plastic film is pasted to produce a skin external preparation. This external preparation for skin is applied to the skin after peeling off the protective film at the time of use.
- a polyurethane resin solution polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that
- the drug-containing ultrafine fiber and the laminate thereof of the present invention have high drug availability, they can be used as a skin application agent.
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Description
本発明は、薬物含有超極細ファイバーならびにこれを積層させた薬物含有超極細ファイバー積層体およびこれらを利用した皮膚適用剤等に関する。 The present invention relates to a drug-containing ultrafine fiber, a drug-containing ultrafine fiber laminate obtained by laminating the drug-containing ultrafine fiber, and a skin application agent using the same.
経口投与に代わる投与経路である経皮吸収は、肝臓における薬物の初回通過効果が回避でき、また、経口投与に比べて薬物の吸収速度が緩やかなため、一過性の急激な薬物の血漿中濃度上昇が起こりにくく、これに伴う副作用や毒性を回避できることが知られている。更に、薬物を持続的に供給でき、血漿中濃度を長時間一定に維持できるため、1日1回ないし数日に1回製剤などとして投薬回数を減らすことが可能であると共に、嚥下服用を苦手とする高齢者や小児の患者でも投薬が容易でかつ服用状態の確認や服薬の中止も容易なことから、服薬コンプライアンスの向上も期待されている。 Transdermal absorption, an alternative route of oral administration, avoids the first-pass effect of the drug in the liver, and the rate of absorption of the drug is slower than oral administration. It is known that the concentration does not increase easily, and side effects and toxicity associated therewith can be avoided. Furthermore, since the drug can be supplied continuously and the plasma concentration can be kept constant for a long time, it is possible to reduce the number of doses as a preparation once a day to once a few days, etc., and it is difficult to swallow. Because it is easy for the elderly and pediatric patients to take medication, and it is easy to check their medication status and discontinue their medication, improvement of medication compliance is also expected.
皮膚に貼付することにより皮膚を通して薬物を体内に投与することを目的とした経皮吸収製剤には、パップ剤、プラスター等の種々の形態のものが開発されており、一般には、薬物を含有する粘着剤層を支持体に積層して構成されるものであるが、含有させる薬物は消炎鎮痛剤等の局所作用薬、血管拡張薬等の全身作用薬など多種多様である。また、貼付部位が皮膚面であるため、貼り付けたときに違和感がなく、また皮膚の動きに追従するものである必要が有り、支持基材には柔軟性を有する素材、例えば、プラスチック製フィルム、不織布、織布等が用いられている。更に、貼付部位が肘膝関節部位等の屈曲部であるものには、柔軟性のほか伸縮性をも具備した素材が用いられている。 Various forms of transdermal absorption preparations intended to administer drugs to the body through the skin by applying to the skin have been developed in various forms such as poultices and plasters, and generally contain drugs The adhesive layer is formed by laminating the adhesive layer on the support, and there are a wide variety of drugs such as local acting drugs such as anti-inflammatory analgesics and systemic acting drugs such as vasodilators. In addition, since the affixed part is the skin surface, there is no sense of incongruity when affixed, and it is necessary to follow the movement of the skin, and the support base material is a flexible material such as a plastic film. Nonwoven fabrics and woven fabrics are used. Furthermore, a material having elasticity as well as flexibility is used for a part where the affixed part is a bent part such as an elbow knee joint part.
皮膚は本来外界からの異物の進入や体内からの水分の蒸発を防ぐバリアー機能として働いているため、薬物の皮膚透過性の向上が最も大きな技術課題である。この薬物の皮膚透過に伴う過程としては、(1)製剤から皮膚への薬物の分配(皮膚移行性)と(2)皮膚内からの拡散による全身循環への移行(皮内拡散性)が挙げられる。 Since the skin originally functions as a barrier function to prevent the entry of foreign substances from the outside world and the evaporation of moisture from the body, improving the skin permeability of the drug is the biggest technical issue. Processes associated with the skin permeation of this drug include (1) distribution of the drug from the preparation to the skin (skin transferability) and (2) transfer to the systemic circulation by diffusion from within the skin (intradermal diffusion). It is done.
しかしながら、一般に経皮吸収製剤における薬物利用能は低く、通例、数%程度しか有効活用されていないのが現状であり、ほとんどの薬物が製剤中に残留してしまうというのが実情である。これは、製剤中に含まれている基剤が、製剤中における薬物の拡散を妨害し、皮膚表面まで薬物が到達できないことが原因と考えられている。 However, the drug availability in transdermally absorbable preparations is generally low, and usually only about a few percent is effectively used, and the reality is that most drugs remain in the preparation. This is considered to be caused by the fact that the base contained in the preparation hinders the diffusion of the drug in the preparation and the drug cannot reach the skin surface.
ところで、ナノファイバーに薬物を含有させる試みとしては、キトサンナノファイバー及び薬物を含むフィルム状製剤が特許文献1に記載されている。しかし当該特許文献では、本質的に繊維質であるキトサンを繰り返し高圧噴射処理して繊維の絡まりをほどくことにより微細化し、これをフィルム化しており、薬物は、この繊維表面やフィルム内の空隙に保持されている。このため、特に皮膚適用剤として用いる場合などには、放出率や放出コントロール性に疑問が残るものである。
By the way, as an attempt to contain a drug in nanofiber,
従って、本発明の課題は、製剤に含まれる薬物の拡散を妨害せず、薬物利用能が高い、新たな製剤技術を提供することである。 Therefore, an object of the present invention is to provide a new formulation technology that does not interfere with the diffusion of the drug contained in the formulation and has high drug availability.
本発明者らは上記課題を解決するために鋭意研究した結果、超極細ファイバーを紡糸する際に用いられる紡糸溶液中に薬剤を含有させることで、紡糸後に得られる超極細ファイバー中に薬物が含有されることおよびこれから薬物を放出させた場合の薬物利用能が高いことを見出し、本発明を完成させた。 As a result of diligent research to solve the above-mentioned problems, the present inventors have included a drug in the ultrafine fiber obtained after spinning by including a drug in the spinning solution used when spinning the ultrafine fiber. And the present invention has been completed by finding that the drug availability is high when the drug is released.
すなわち、本発明は超極細ファイバーに薬物を含有させたことを特徴とする薬物含有超極細ファイバーである。 That is, the present invention is a drug-containing ultrafine fiber characterized in that a drug is contained in the ultrafine fiber.
また、本発明は上記薬物含有超極細ファイバーを積層させたことを特徴とする薬物含有超極細ファイバー積層体およびこれを含有することを特徴とする皮膚適用剤である。 The present invention also provides a drug-containing ultrafine fiber laminate characterized by laminating the above-mentioned drug-containing ultrafine fibers and a skin application agent characterized by containing the same.
更に、本発明は薬物と、紡糸可能な基剤とを混合して得られる紡糸溶液を紡糸することを特徴とする薬物含有超極細ファイバーの製造方法である。 Furthermore, the present invention is a method for producing a drug-containing ultrafine fiber characterized by spinning a spinning solution obtained by mixing a drug and a spinnable base.
また更に、本発明は薬物と、紡糸可能な基剤とを混合して得られる紡糸溶液を紡糸しながら積層させることを特徴とする薬物含有超極細ファイバー積層体の製造方法である。 Furthermore, the present invention is a method for producing a drug-containing ultrafine fiber laminate, wherein a spinning solution obtained by mixing a drug and a spinnable base material is laminated while spinning.
本発明の薬物含有超極細ファイバーやこれを積層させた薬物含有超極細ファイバー積層体は、超極細ファイバー中に薬物が含有されているため薬物利用能が高く、かつ実用レベルの安定性を有するものである。 The drug-containing ultrafine fiber of the present invention and the drug-containing superfine fiber laminate obtained by laminating the drug-containing ultrafine fiber have high drug utilization and have a practical level of stability because the drug is contained in the ultrafine fiber. It is.
従って、本発明の薬物含有超極細ファイバーおよび薬物含有超極細ファイバー積層体は損傷皮膚被覆剤や経皮吸収製剤等の皮膚適用剤に好適に利用することができ、その薬物利用能が高いため、これらを用いることで、上記製剤の軽量化、薄層化を図ることができる。 Therefore, the drug-containing ultrafine fiber and the drug-containing ultrafine fiber laminate of the present invention can be suitably used for a skin application agent such as a damaged skin coating agent or a transdermal absorption preparation, and its drug utilization is high. By using these, the formulation can be reduced in weight and thinned.
本発明の薬物含有超極細ファイバー(以下、「本発明ファイバー」ということもある)は、超極細ファイバー中に薬物を含有させたものである。本発明ファイバーは、後記するように紡糸可能な基剤と薬物を一緒に紡糸するため、薬物が超極細ファイバー中に分散している。そのため薬剤は超極細ファイバーの表面および内部の両方に存在することになる。なお、本明細書において「超極細ファイバー」とはナノオーダー、マイクロオーダーの直径を有するナノファイバー、マイクロファイバー等の超極細繊維であり、具体的には単繊維の直径が1nm~10μm、好ましくは1~2000nm、より好ましくは5~1000nmであり、特に好ましくは10~700nmであるものをいう。また、長さは少なくとも直径の10倍以上、好ましくは100倍以上、より好ましくは1000倍以上のものである。繊維径を太く設定すれば、薬物の放出時間が長くなり、逆に細く設定すれば、放出時間を短くすることができるため、薬物の放出コントロールが可能である。 The drug-containing ultrafine fiber of the present invention (hereinafter sometimes referred to as “the fiber of the present invention”) is obtained by containing a drug in the ultrafine fiber. Since the fiber of the present invention spins together a spinnable base and a drug as will be described later, the drug is dispersed in the ultrafine fiber. Therefore, the drug exists on both the surface and the inside of the ultrafine fiber. In the present specification, the “ultrafine fiber” is a nanofiber having a nano-order or micro-order diameter, or a microfiber such as a microfiber. Specifically, the diameter of a single fiber is 1 nm to 10 μm, preferably It is 1 to 2000 nm, more preferably 5 to 1000 nm, and particularly preferably 10 to 700 nm. Further, the length is at least 10 times the diameter, preferably 100 times or more, more preferably 1000 times or more. If the fiber diameter is set to be thick, the drug release time becomes long. Conversely, if the fiber diameter is set to be thin, the release time can be shortened, so that the drug release can be controlled.
本発明ファイバーは紡糸可能な基剤で主に構成される。この紡糸可能な基剤は、繊維形成性のもので、超極細ファイバーを紡糸可能なものであれば特に限定されないが、例えば、ポリ乳酸系脂肪族ポリエステル、ポリカプロラクトン系脂肪族ポリエステル、微生物産生脂肪族系ポリエステル、ポリヒドロキシアルカノエイト、ポリブチレンサクシネート等の脂肪族系ポリエステル、アミノカルボン酸、ラクタム、ジアミン、ジカルボン酸等を重縮合あるいは共縮重合して得られるナイロン6、ナイロン11、ナイロン12、ナイロン66、ナイロン610、ナイロン46、ナイロン6T、ナイロン6I、ナイロン9T、ナイロンM5T、ナイロン612等や、芳香族ジアミンとジカルボン酸とを共重合して得られるパラ系全芳香族ポリアミド、メタ系全芳香族ポリアミド等のポリアミド系樹脂、エーテル系ポリウレタン樹脂、エステル系ポリウレタン樹脂等のポリウレタン樹脂、ポリアクリル酸、ポリアクリル酸部分中和物、ポリアクリル酸完全中和物、メトキシエチレン無水マレイン酸共重合体およびその中和物、メトキシエチレンマレイン酸共重合体およびその中和物、カルボキシビニルポリマー、ポリアクリル酸デンプン、ポリアクリルアミド、ポリアクリルアミド誘導体、N-ビニルアセトアミド、N-ビニルアセトアミドとアクリル酸またはアクリル酸塩との共重合体等のイオン性合成高分子、ポリビニルアルコール、ポリビニルピロリドン、ポリエチレンオキサイド等の非イオン性合成高分子、アラビアガム、トラガントガム、ローカストビーンガム、グアーガム、エコーガム、カラヤガム、寒天、デンプン、カラギーナン、アルギン酸、アルギン酸塩、アルギン酸プロピレングリコール、デキストラン、デキストリン、アミロース、ゼラチン、コラーゲン、プルラン、ペクチン、アミロペクチン、スターチ、キチン、キトサン、アルブミン、カゼイン、メチルセルロース、エチルセルロース、プロピルセルロース、エチルメチルセルロース、ヒドロキシメチルセルロース、ヒドロキシエチルセルロース、ヒドロキシプロピルメチルセルロース、ヒドロキシプロピルスターチ等の天然樹脂あるいは半合成系樹脂等が挙げられる。これらの紡糸可能な基剤の中でもポリウレタン樹脂、ポリビニルアルコールおよびゼラチンが好ましい。また、これらの基剤は1種または2種以上を用いることができる。更に、これらの基剤の本発明ファイバーにおける含有量は特に限定されないが、例えば、50~99.9質量%(以下、単に「%」という)、好ましくは70~99%である。
The present fiber is mainly composed of a spinnable base. The spinnable base is not particularly limited as long as it is fiber-forming and can spin ultrafine fibers. For example, polylactic acid-based aliphatic polyester, polycaprolactone-based aliphatic polyester, microorganism-produced
本発明ファイバーに含有される薬物は、特に限定されないが、例えば、経皮的に生体内に吸収される薬物や、損傷皮膚治療、▲座▼瘡治療に用いられる薬物などが挙げられる。このような薬物としては、ハイドロコーチゾン、プレドニゾロン、パラメタゾン、ベクロメタゾンジプロピオネート、フルメタゾン、ベタメタゾン、ベタメタゾンバレレート、デキサメタゾン、トリアムシノロン、トリアムシノロンアセトニド、フルオシノロン、フルオシノロンアセトニド、フルオシノロンアセトニドアセテート、プロピオン酸クロベタゾール等のコルチコステロイド類、インドメタシン、ケトプロフェン、アセトアミノフェン、メフェナム酸、フルフェナム酸、ジクロフェナクまたはその塩、アルクロフェナック、オキシフェンブタゾン、フェニルブタゾン、イブプロフェン、フルルビプロフェン、サリチル酸、サリチル酸メチル、L-メントール、カンファー、スリンダク、トルメチンナトリウム、ナプロキセン、フェンブフェン、フェルビナク、ロキソプロフェン、グリチルレチン酸等の消炎鎮痛剤、フェノバルビタール、アモバルビタール、シクロバルビタール、トリアゾラム、ニトラゼパム、フルニトラゼパム、ロラゼパム、ハロペリドール等の催眠鎮静剤、フルフェナジン、テオリタジン、ジアゼパム、フルジアゼパム、フルニトラゼパム、クロルプロマジン等の精神安定剤、クロニジン、塩酸クロニジン、ピンドロール、プロプラノロール、塩酸プロプラノロール、ブフラノール、インデノロール、ニルバジピン、ニモジピン、ロフェジキシン、ニトレンジピン、ニプラジロール、ブクモロール、ニフェジピン等の抗高血圧剤、ハイドロサイアザイド、ベンドロフルメサイアザイド、シクロベンチアザイド等の降圧利尿剤、ペニシリン、テトラサイクリン、オキシテトラサイクリン、硫酸フラジオマイシン、エリスロマイシン、クロラムフェニコール等の抗生物質、リドカイン、塩酸ジブカイン、ベンゾカイン、アミノ安息香酸エチル等の麻酔剤、塩化ベンザルコニウム、ニトロフラゾン、ナイスタチン、アセトスルファミン、ペンタマイシン、アムホテリシンB、ピロールニトリン、クロトリマゾール等の抗菌性・抗真菌物質、ビタミンA、ビタミンE(トコフェロール酢酸エステル)、ビタミンK、エルゴカルシフェロール、コレカルシフェロール、オクトチアシン、リボフラビン酪酸エステル等のビタミン剤、ニトラゼパム、メプロバメート、クロナゼパム等の抗癲癇剤、ニトログリセリン、ニトログリコール、イソソルビドジナイトレート、エリスリトールテトラナイトレート、プロパチルナイトレート、ジピリダモール、モルシドミン等の冠血管拡張剤、クロモグリク酸またはその塩、トラニラスト、レピリナスト、アンレキサノクス、イブジラスト、タザノラスト、ペミロラストまたはその塩、ケトチフェン、アゼラスチン、オキサトミド、メキタジン、エピナスチンまたはその塩、テルフェナジン、アステミゾールなどの抗アレルギー剤、ジフェンヒドラミンまたはその塩、クロルフェニラミン、ジフェニルイミダゾール等の抗ヒスタミン剤、臭化水素酸デキストロメトルファン、デキストロメトルファン、テルブタリン、硫酸テルブタリン、エフェドリン、塩酸エフェドリン、硫酸サルブタモール、サルブタモール、塩酸イソプロテレノール、イソプロテレノール、硫酸イソプロテレノール等の鎮咳剤、プロゲステロン、エストラジオール等の性ホルモン、ドキセピン等の抗鬱剤、ヒデルギン、エルゴットアルカロイド、イフェンプロジル等の脳循環改善剤、メトクロプラミド、クレボプライド、ドンペリドン、スコポラミン、臭化水素酸スコポラミン等の制吐剤や抗潰瘍剤、ポリペプチド類等の生体医薬、アダパレン、グリコール酸、サリチル酸マクロゴール、サリチル酸エタノール、上述の抗生物質、および上述のステロイド類等から選択される▲座▼瘡治療薬、フェンタニル、デスモプレシン、ジゴキシン、5-フルオロウラシル、メルカプトプリン、ニコチン等が挙げられる。これらの薬物の中でもインドメタシン、フェルビナク、ロキソプロフェンまたはその塩、クロルフェニラミンまたはその塩、ジフェンヒドラミンまたはその塩、リドカインまたはその塩、アミノ安息香酸エチル、トラニラスト、グリチルレチン酸およびトコフェロール酢酸エステルが好ましい。これらの薬物は治療の目的、作用などに応じて1種または2種以上を用いることができる。これらの薬物の本発明ファイバーにおける含有量は特に限定されないが、例えば、0.001~50%、好ましくは0.01~30%である。 The drug contained in the fiber of the present invention is not particularly limited, and examples thereof include a drug that is absorbed into the living body percutaneously, a drug for treating damaged skin, and a treatment for acne. Such drugs include hydrocortisone, prednisolone, parameterzone, beclomethasone dipropionate, flumetasone, betamethasone, betamethasone valerate, dexamethasone, triamcinolone, triamcinolone acetonide, fluocinolone, fluocinolone acetonide, fluocinolone acetonide acetate, Corticosteroids such as clobetasol propionate, indomethacin, ketoprofen, acetaminophen, mefenamic acid, flufenamic acid, diclofenac or its salts, alclofenac, oxyphenbutazone, phenylbutazone, ibuprofen, flurbiprofen, salicylic acid , Methyl salicylate, L-menthol, camphor, sulindac, tolmetin sodium, naproxen, fe Antiphlogistic analgesics such as bufen, felbinac, loxoprofen, glycyrrhetinic acid, hypnotic sedatives such as phenobarbital, amobarbital, cyclobarbital, triazolam, nitrazepam, flunitrazepam, lorazepam, haloperidol, flufenadine, theoritadine, diazepam, fludiazepam, fludiazepam, fludiazepam Tranquilizers such as chlorpromazine, clonidine, clonidine hydrochloride, pindolol, propranolol, propranolol hydrochloride, bufuranol, indenolol, nilvadipine, nimodipine, lofedixine, nitrendipine, nipradilol, bucmolol, nifedipine and other antihypertensive agents, hydrothiazide, bendroflumesia Antihypertensive diuretics such as cyclobench azide, penicillin, tetrasai Antibiotics such as phosphorus, oxytetracycline, fradiomycin sulfate, erythromycin, chloramphenicol, anesthetics such as lidocaine, dibucaine hydrochloride, benzocaine, ethyl aminobenzoate, benzalkonium chloride, nitrofurazone, nystatin, acetosulfamine, pentamycin Vitamins such as antibacterial and antifungal substances such as amphotericin B, pyrrolnitrin, clotrimazole, vitamin A, vitamin E (tocopherol acetate), vitamin K, ergocalciferol, cholecalciferol, octothiacin, riboflavin butyrate Agents, nitrazepam, meprobamate, clonazepam and other antiepileptics, nitroglycerin, nitroglycol, isosorbide dinitrate, erythritol tetranitrate, pro Coronary vasodilators such as til nitrate, dipyridamole, molsidomine, cromoglycic acid or its salt, tranilast, repirinast, amlexanox, ibudilast, tazanolast, pemirolast or its salt, ketotifen, azelastine, oxatomide, mequitazine, epinastine or its salt, terfenadine, Antiallergic agents such as astemizole, diphenhydramine or its salts, antihistamines such as chlorpheniramine and diphenylimidazole, dextromethorphan hydrobromide, dextromethorphan, terbutaline, terbutaline sulfate, ephedrine, ephedrine hydrochloride, salbutamol sulfate, salbutamol, hydrochloric acid Anti-tussives such as isoproterenol, isoproterenol and isoproterenol sulfate, progester , Hormones such as estradiol, antidepressants such as doxepin, cerebral circulation improvers such as hydergine, ergot alkaloids, ifenprodil, antiemetics and antiulcers such as metoclopramide, clevopride, domperidone, scopolamine, and scopolamine hydrobromide Agents, biopharmaceuticals such as polypeptides, adapalene, glycolic acid, macrogol salicylate, ethanol salicylate, the above-mentioned antibiotics, the above-mentioned steroids, etc. ▲ Acne therapeutic agent, fentanyl, desmopressin, digoxin, Examples include 5-fluorouracil, mercaptopurine, and nicotine. Among these drugs, indomethacin, felbinac, loxoprofen or a salt thereof, chlorpheniramine or a salt thereof, diphenhydramine or a salt thereof, lidocaine or a salt thereof, ethyl aminobenzoate, tranilast, glycyrrhetinic acid and tocopherol acetate are preferable. These drugs can be used alone or in combination of two or more depending on the purpose and action of treatment. The content of these drugs in the fiber of the present invention is not particularly limited, but is, for example, 0.001 to 50%, preferably 0.01 to 30%.
また、本発明ファイバーには、薬物の経皮吸収を促進させるための経皮吸収促進剤を含有させることができる。経皮吸収促進剤は特に限定されないが、例えば、オレイルアルコール、ポリオキシエチレンオレイルエーテル、モノオレイン酸ポリエチレングリコール等のアルコール、エステル類またはエーテル類、モノラウリン酸ソルビタン、モノオレイン酸ソルビタン等のソルビタンエステル類またはエーテル類、ポリオキシエチレンノニルフェニルエーテル、ポリオキシエチレンオクチルフェニルエーテル等のフェノールエーテル類、ジオクチルソジウムスルホサクシネート、オレオイルサルコシン、ラウリルジメチルアミノ酢酸ベタイン、ラウリル硫酸ナトリウム等のイオン性界面活性剤、n-アルキルグルコシド、n-アルキルチオグルコシド、ポリオキシエチレンラウリルエーテル、ジメチルラウリルアミンオキサイド等の非イオン性界面活性剤、ジメチルスルホキシド、デシルメチルスルホキサイド等のアルキルメチルスルホキサイド類、2-ピロリドン、1-メチル-2-ピロリドン、ドデシルピロリドン等のピロリドン類、1-ドデシルアザシクロヘプタン-2-オン、1-ゲラニルアザシクロヘプタン-2-オン等のアザシクロアルカン類、ジイソプロパノールアミン、トリイソプロパノールアミン、モノエタノールアミン、ジエタノールアミン、トリエチルアミン等のアミン類、L-メントール、シネオール等のテルペン類等が挙げられる。これらの経皮吸収促進剤の中でもクロタミトン、アジピン酸ジイソプロピル、L-メントール、モノカプリル酸プロピレングリコールおよびジカプリル酸プロピレングリコールが好ましい。また、これらの経皮吸収促進剤は1種または2種以上を用いることができる。更に、これらの経皮吸収促進剤の本発明ファイバーにおける含有量は特に限定されないが、例えば、0.001~50%、好ましくは0.01~30%である。 The fiber of the present invention can contain a percutaneous absorption enhancer for promoting percutaneous absorption of the drug. Although the percutaneous absorption enhancer is not particularly limited, for example, alcohols such as oleyl alcohol, polyoxyethylene oleyl ether, polyethylene glycol monooleate, esters or ethers, sorbitan esters such as sorbitan monolaurate, sorbitan monooleate, etc. Or ionic surfactants such as ethers, phenol ethers such as polyoxyethylene nonylphenyl ether and polyoxyethylene octylphenyl ether, dioctylsodium sulfosuccinate, oleoyl sarcosine, betaine lauryldimethylaminoacetate, sodium lauryl sulfate , N-alkyl glucoside, n-alkyl thioglucoside, polyoxyethylene lauryl ether, dimethyl lauryl amine oxide, etc. , Alkylmethyl sulfoxides such as dimethyl sulfoxide and decylmethyl sulfoxide, pyrrolidones such as 2-pyrrolidone, 1-methyl-2-pyrrolidone and dodecylpyrrolidone, 1-dodecylazacycloheptan-2-one, 1- And azacycloalkanes such as geranylazacycloheptan-2-one, amines such as diisopropanolamine, triisopropanolamine, monoethanolamine, diethanolamine, and triethylamine, and terpenes such as L-menthol and cineol. Among these transdermal absorption enhancers, crotamiton, diisopropyl adipate, L-menthol, propylene glycol monocaprylate and propylene glycol dicaprylate are preferred. These percutaneous absorption enhancers can be used alone or in combination of two or more. Further, the content of these percutaneous absorption enhancers in the fiber of the present invention is not particularly limited, but is, for example, 0.001 to 50%, preferably 0.01 to 30%.
更に、本発明ファイバーには、本発明の効果を損なうことがない範囲で、超極細ファイバーに添加可能な、公知の可塑剤、酸化防止剤等のその他の成分を含有させてもよい。 Furthermore, the fiber of the present invention may contain other components such as known plasticizers and antioxidants that can be added to the ultrafine fiber as long as the effects of the present invention are not impaired.
本発明ファイバーは、種々の基剤、薬剤、経皮吸収促進剤の組合せを用いて調製することができるが、特に、基剤がポリウレタン樹脂であり、薬物がインドメタシンであり、経皮吸収促進剤がクロタミトン、ジカプリル酸プロピレングリコール、モノカプリル酸プロピレングリコールから選択される1種または2種以上である組合せが特に好ましい。 The fiber of the present invention can be prepared using a combination of various bases, drugs, and percutaneous absorption enhancers. In particular, the base is a polyurethane resin, the drug is indomethacin, and the percutaneous absorption enhancer. Is a combination in which is one or more selected from crotamiton, propylene glycol dicaprylate, and propylene glycol monocaprylate.
上記した本発明ファイバーは、薬物と紡糸可能な基剤、必要により経皮吸収促進剤やその他の成分とを混合して得られる紡糸溶液を、当該基剤が紡糸されるのに適した条件で紡糸することにより得ることができる。具体的に紡糸溶液は、例えば、水や有機溶媒で適宜希釈された紡糸可能な基剤に、薬物、必要により経皮吸収促進剤やその他の成分とを撹拌、混合して調製すればよい。水や有機溶媒は基剤、薬物、経皮吸収促進剤を溶解できるものがより好ましい、なお、これらの溶媒は紡糸の際の加熱により瞬時に揮散するため本発明ファイバー中にはほとんど存在しない。また、使用される有機溶媒は、特に限定されないが、メタノール、エタノール、アセトニトリル、プロパノール、イソプロパノール、トルエン、シクロヘキサン、テトラヒドロフラン、ジメチルスルホキシド、塩化メチレン、クロロホルム、四塩化炭素、1,4-ジオキサン、ピリジン、トリクロロエタン、N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、N-メチル-2-ピロリドン、エチレンカーボネート、ジエチルカーボネート、プロピレンカーボネート、メチルエチルケトン、ベンジルアルコール、フェノール、メチルイソブチルケトン、メチルヘキシルケトン、メチルプロピルケトン、ジイソプロピルケトン、ジイソブチルケトン等が挙げられる。中でも、N,N-ジメチルホルムアミドおよびメチルエチルケトンが好ましい。 The above-described fiber of the present invention comprises a spinning solution obtained by mixing a drug and a spinnable base, and if necessary, a percutaneous absorption accelerator and other components under conditions suitable for spinning the base. It can be obtained by spinning. Specifically, the spinning solution may be prepared, for example, by stirring and mixing a drug, and if necessary, a percutaneous absorption enhancer and other components in a spinnable base appropriately diluted with water or an organic solvent. It is more preferable that water or an organic solvent can dissolve the base, the drug, and the transdermal absorption enhancer. However, since these solvents are instantly volatilized by heating during spinning, they are hardly present in the fiber of the present invention. Further, the organic solvent used is not particularly limited, but methanol, ethanol, acetonitrile, propanol, isopropanol, toluene, cyclohexane, tetrahydrofuran, dimethyl sulfoxide, methylene chloride, chloroform, carbon tetrachloride, 1,4-dioxane, pyridine, Trichloroethane, N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, ethylene carbonate, diethyl carbonate, propylene carbonate, methyl ethyl ketone, benzyl alcohol, phenol, methyl isobutyl ketone, methyl hexyl ketone, methyl propyl Ketone, diisopropyl ketone, diisobutyl ketone and the like can be mentioned. Of these, N, N-dimethylformamide and methyl ethyl ketone are preferred.
上記した紡糸溶液を紡糸させる方法としては、ナノファイバー、マイクロファイバー等の超極細ファイバーを紡糸できる方法であれば特に限定されないが、例えば、エレクトロスピニング法(電界紡糸法)、複合溶融紡糸法、メルトブロー法等が挙げられる。これらの方法の中でもエレクトロスピニング法またはメルトブロー法が好ましく、エレクトロスピニング法がより好ましい。なお、このエレクトロスピニング法については、例えば、佐藤らの「電界紡糸法によるナノファイバーの製造技術」(http://www.aichi-inst.jp/mikawa/research/report/mikawa_2006_02.pdf)等の文献で詳細に説明されているので、これの記載を参考にしてもよい。また、紡糸溶液を紡糸させる条件も特に限定されず、上記方法の通常の条件に従えばよい。なお、本発明ファイバーを紡糸する際に、例えば、ディスクコレクターやドラムコレクターを用いて行えば配向した本発明ファイバーが得られ、プレートコレクターを用いて行えば配向していない本発明ファイバーを得ることができる。 The spinning method described above is not particularly limited as long as it can spin ultrafine fibers such as nanofibers and microfibers. For example, electrospinning (electrospinning), composite melt spinning, melt blowing, Law. Among these methods, the electrospinning method or the melt blowing method is preferable, and the electrospinning method is more preferable. As for this electrospinning method, for example, Sato et al.'S “Technology for producing nanofibers by electrospinning” (http://www.aichi-inst.jp/mikawa/research/report/mikawa_2006_02.pdf) Since it is explained in detail in the literature, this description may be referred to. Further, the conditions for spinning the spinning solution are not particularly limited, and the usual conditions of the above method may be followed. When spinning the fiber of the present invention, for example, an oriented fiber of the present invention can be obtained by using a disk collector or a drum collector, and an unoriented fiber of the present invention can be obtained by using a plate collector. it can.
また、上記のようにして紡糸溶液を紡糸しながら本発明ファイバーを積層させることにより本発明の超極細ファイバー積層体(以下、単に「本発明積層体」ということもある)が得られる。積層の方法は、1本または複数の本発明ファイバーを積み重ねて空隙を有する層を形成できる方法であれば特に限定されず、例えば、本発明ファイバーを紡糸する際に、上記したディスクコレクターやドラムコレクターを用いて、本発明ファイバーをランダムな状態で積層させる方法が挙げられる。なお、本発明積層体の厚みはディスクコレクター、ドラムコレクター等の回転、往復等の速度等で適宜調整することができる。 In addition, the ultrafine fiber laminate of the present invention (hereinafter sometimes simply referred to as “the laminate of the present invention”) is obtained by laminating the present fiber while spinning the spinning solution as described above. The lamination method is not particularly limited as long as one or a plurality of the fibers of the present invention can be stacked to form a layer having voids. For example, when spinning the fibers of the present invention, the above-described disk collector or drum collector is used. And a method of laminating the fiber of the present invention in a random state. The thickness of the laminate of the present invention can be appropriately adjusted by the speed of rotation, reciprocation, etc. of the disk collector, drum collector, etc.
本発明積層体の薬物の含有量は、製造条件等により適宜調整することができるので、特に限定されないが、例えば、本発明積層体の1gあたり0.00001~0.5g、好ましくは0.0001~0.3gとなる。なお、本発明積層体における前記薬物の含有量は、これを構成する本発明ファイバーに由来するものであり、本発明積層体の空隙に別途薬物等を注入、担持等させた場合の含有量ではない。 The content of the drug in the laminate of the present invention can be appropriately adjusted depending on production conditions and the like, and is not particularly limited. For example, 0.0001 to 0.5 g per 1 g of the laminate of the present invention, preferably 0.0001. ~ 0.3g. The content of the drug in the laminate of the present invention is derived from the fiber of the present invention constituting this, and the content when a drug or the like is separately injected and supported in the voids of the laminate of the present invention. Absent.
以下、上記した紡糸溶液から本発明ファイバーが積層された本発明積層体を得る方法を、具体的にエレクトロスピニング法を例にとって説明する。 Hereinafter, a method for obtaining the laminate of the present invention in which the fiber of the present invention is laminated from the above spinning solution will be described specifically by taking an electrospinning method as an example.
エレクトロスピニング法に用いられる装置は、特に限定されないが、例えば、図1に示されるような装置を用いることができる。図1に記載の超極細ファイバー製造装置1は、紡糸溶液タンク2、ノズル3、高電圧電源4、回転可能なコレクター5、導電性薄膜6を備える。高電圧電源4のプラス極はノズル3に接続され、マイナス極はコレクター5の表面に貼り付けられた導電性薄膜6に接続されている。また、コレクター5はノズル3に対し直角な軸で回転する。
Although the apparatus used for the electrospinning method is not particularly limited, for example, an apparatus as shown in FIG. 1 can be used. An ultrafine
この装置で本発明ファイバー積層体を製造するには、まず、薬物と紡糸可能な基剤を含有する紡糸溶液を混合、撹拌等して調製し、これを紡糸溶液タンク2に充填する。次に、導電性薄膜6が表面に貼り付けられたコレクター5を回転させ、更に高電圧電源4にてプラスの電圧を印加されたノズル3の先端から垂れない程度に紡糸溶液を押し出す。これにより高電圧電源4でマイナスの電圧を印加された導電性薄膜6上に、プラスの電荷を有する紡糸溶液7がマイナスの電荷を有する導電性薄膜6に引きつけられて薬物含有超極細ファイバー8が積層され、薬物含有超極細ファイバー積層体9が得られる。この装置における好ましい薬物含有超極細ファイバー積層体の製造条件は以下の通りである。
In order to produce the fiber laminate of the present invention with this apparatus, first, a spinning solution containing a drug and a spinnable base is prepared by mixing and stirring, and this is filled in the
<薬物含有超極細ファイバー積層体の製造条件>
ノズルとコレクター間の距離:
1~30cm、好ましくは2~20cm、より好ましくは4~10cm
印加電圧:
3~30kV、好ましくは5~25kV、より好ましくは7~20kV
コレクター回転速度:
0.5~20m/分、好ましくは2~10、より好ましくは3~6m/分
コレクター直径:
5~200cm、好ましくは10~50cm、より好ましくは15cm ~30cm
噴射時間:
10~80分間
導電性薄膜:
アルミ箔
<Production conditions for drug-containing ultrafine fiber laminate>
Distance between nozzle and collector:
1-30 cm, preferably 2-20 cm, more preferably 4-10 cm
Applied voltage:
3-30 kV, preferably 5-25 kV, more preferably 7-20 kV
Collector rotation speed:
0.5-20 m / min, preferably 2-10, more preferably 3-6 m / min Collector diameter:
5 to 200 cm, preferably 10 to 50 cm, more preferably 15 cm to 30 cm
Injection time:
10-80 minutes conductive film:
Aluminum foil
上記した本発明ファイバーやその積層体は、可塑性に優れ、また、薬物利用能が高いことにより、従来の薬物層と比べて、軽量化、薄層化を図ることが可能である。これらのファイバーやその積層体は、例えば、皮膚適用剤、中でも、損傷皮膚被覆剤、経皮吸収製剤等に利用することができ、これらの中でも経皮吸収製剤に利用することが好ましい。 The above-described fibers of the present invention and laminates thereof are excellent in plasticity and have high drug availability, so that it is possible to reduce the weight and thickness compared to conventional drug layers. These fibers and laminates thereof can be used for, for example, a skin application agent, particularly a damaged skin coating agent, a transdermal absorption preparation, and the like, and among these, it is preferable to use the transdermal absorption preparation.
本発明ファイバーやその積層体を利用した経皮吸収製剤は、従来公知の薬物層の代わりに本発明ファイバーやその積層体、好ましくは本発明積層体を用いることで得られる。具体的な経皮吸収製剤の一態様としては、例えば、皮膚適用面から順に、本発明積層体、薬物不透過層、粘着層を設けたもの、更に必要により本発明積層体を保護するために保護層を設けたものが挙げられる。薬物不透過層、保護層の材質は、特に限定されないが、例えば、プラスチックフィルム、アルミ箔等が挙げられる。また、粘着層としては、本発明積層体よりも相対的に大きい大きさのプラスチックフィルム、アルミ箔等に膏体や粘着剤を塗膏したものが挙げられ、中でも膏体や粘着剤に薬物を含有しないものを用いることが好ましい。 A transdermally absorbable preparation using the fiber of the present invention or a laminate thereof can be obtained by using the fiber of the present invention or a laminate thereof, preferably the laminate of the present invention, instead of a conventionally known drug layer. As a specific embodiment of the transdermally absorbable preparation, for example, in order from the skin application surface, the laminate of the present invention, a drug-impermeable layer, an adhesive layer are provided, and further, if necessary, to protect the laminate of the present invention. The thing which provided the protective layer is mentioned. The material of the drug-impermeable layer and the protective layer is not particularly limited, and examples thereof include a plastic film and an aluminum foil. In addition, examples of the adhesive layer include a plastic film having a size relatively larger than that of the laminate of the present invention, and an aluminum foil coated with a paste or an adhesive. Among them, a drug is applied to the paste or the adhesive. It is preferable to use one that does not contain.
このようにして得られる経皮吸収製剤は、薬物利用能が高く、しかも、薬物層が薄いため様々な形状にすることが容易である。 The percutaneously absorbable preparation thus obtained has a high drug availability and can be easily formed into various shapes because the drug layer is thin.
以下、本発明を実施例を挙げて詳細に説明するが、本発明はこれら実施例に何ら限定されるものではない。 Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.
参 考 例 1
超極細ファイバー積層体の製造:
超極細ファイバー積層体の製造は、以下の表1に記載の紡糸可能な基剤を含有する紡糸溶液を用い、図1に記載の超極細ファイバー製造装置1および以下の条件を用いたエレクトロスピニング法で行った。
Reference example 1
Manufacture of ultra-fine fiber laminates:
The production of a superfine fiber laminate is performed by using a spinning solution containing a spinnable base shown in Table 1 below, and an electrospinning method using the superfine
まず、以下の表1に記載の組成の紡糸溶液を調製し、これを紡糸溶液タンク2に充填した。次に、導電性薄膜6が表面に貼り付けられたコレクター5を回転させ、更に高電圧電源4にてプラスの電圧を印加されたノズル3の先端から垂れない程度に紡糸溶液を押し出した。これにより高電圧電源4でマイナスの電圧を印加された導電性薄膜6上に、プラスの電荷を有する紡糸溶液7がマイナスの電荷を有する導電性薄膜6に引きつけられて超極細ファイバーが積層され、これを剥がして超極細ファイバー積層体を得た。得られた超極細ファイバー積層体の外観を電子顕微鏡により観察し、以下の外観評価基準1により評価した。その結果も表1に示した。
First, a spinning solution having the composition shown in Table 1 below was prepared, and this was filled in the
<超極細ファイバー積層体の製造条件>
ノズルとコレクター間の距離:7.5cm
印加電圧:15~18kV
コレクター回転速度:4.4m/分
コレクター直径:17cm
噴射時間:40分間
導電性薄膜:アルミ箔
<Manufacturing conditions for ultrafine fiber laminate>
Distance between nozzle and collector: 7.5cm
Applied voltage: 15-18kV
Collector rotation speed: 4.4 m / min Collector diameter: 17 cm
Spraying time: 40 minutes Conductive thin film: Aluminum foil
<外観評価基準1>
(評価) (内容)
◎ : 超極細ファイバー積層体に、外観不良が認められない状態
○ : 超極細ファイバー積層体に、わずかな超極細ファイバーの形状不 良が認められる状態
△ : 超極細ファイバー積層体に、わずかな基剤の凝集が認められる状 態
× : 超極細ファイバー積層体に、著しい外観不良が認められる状態
<
(Evaluation) (Content)
◎: Appearance defect is not observed in the ultra-fine fiber laminate ○: Slightly poor shape of the ultra-fine fiber is observed in the ultra-fine fiber laminate △: Slight basis in the ultra-fine fiber laminate State in which agent coagulation is observed ×: State in which a marked appearance defect is observed in the ultrafine fiber laminate
以上の結果より、水溶性基材のゼラチンおよびポリビニルアルコール、疎水性基材のポリウレタンの何れでも超極細ファイバーの積層体が製造可能なことがわかった。 From the above results, it was found that a laminate of ultrafine fibers can be produced using any of water-soluble base gelatin and polyvinyl alcohol and hydrophobic base polyurethane.
実 施 例 1
薬物含有超極細ファイバー積層体の製造:
ゼラチン水溶液(ゼラチン30%および水70%)に、以下の表2に記載の薬物を超極細ファイバー中の薬物濃度が、表2に記載の量になるように含有させた紡糸溶液を調製した。この紡糸溶液を用いる以外は参考例1と同様にして薬物含有超極細ファイバー積層体を製造した。得られた薬物含有超極細ファイバー積層体の外観を電子顕微鏡により観察し、以下の外観評価基準2により評価した。その結果も表2に示した。また、これら薬物含有超極細ファイバー積層体の電子顕微鏡写真を図2~4に示した。
Example 1
Production of drug-containing ultrafine fiber laminate:
A spinning solution was prepared in which an aqueous gelatin solution (
<外観評価基準2>
(評価) (内容)
◎ : 薬物含有超極細ファイバー積層体に、外観不良が認められない状 態
○ : 薬物含有超極細ファイバー積層体に、わずかな超極細ファイバー の形状不良が認められる状態
△ : 薬物含有超極細ファイバー積層体に、わずかな薬物の析出が認め られる状態
× : 薬物含有超極細ファイバー積層体に、著しい外観不良が認められ る状態
<
(Evaluation) (Content)
◎: Appearance failure is not observed in the drug-containing ultrafine fiber laminate ○: Slightly superfine fiber shape defect is observed in the drug-containing ultrafine fiber laminate △: Drug-containing ultrafine fiber laminate A state where slight precipitation of the drug is observed on the body ×: A state where a marked appearance defect is observed in the drug-containing ultrafine fiber laminate
以上の結果より、薬物を含有させた紡糸溶液を用いて超極細ファイバー積層体を製造することにより薬物が超極細ファイバー中に分散し、表面や内部に含有されることがわかった。なお、薬物含有超極細ファイバー積層体を構成する薬物含有超極細ファイバーは電子顕微鏡写真における測定によれば、繊維の平均直径がいずれも約100~約300nmで、長さは直径の1000倍以上であった。 From the above results, it was found that by producing a superfine fiber laminate using a spinning solution containing a drug, the drug is dispersed in the ultrafine fiber and contained on the surface or inside. The drug-containing ultrafine fibers constituting the drug-containing ultrafine fiber laminate have an average fiber diameter of about 100 to about 300 nm and a length of 1000 times the diameter or more according to measurement in an electron micrograph. there were.
実 施 例 2
薬物含有超極細ファイバー積層体の製造:
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、以下の表3に記載の薬物を超極細ファイバー中の薬物濃度が10%(一部は30%)となるように含有させた紡糸溶液を調製した。この紡糸溶液を用いて参考例1と同様にして薬物含有超極細ファイバー積層体を製造した。得られた薬物含有超極細ファイバー積層体の製造直後、60℃3日後、60℃5日後の外観を電子顕微鏡により観察し、以下の外観判定基準3により評価し、更にそれぞれの評価を基に以下の基準により総合判定した。その結果も表3に示した。
Example 2
Production of drug-containing ultrafine fiber laminate:
In the polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%), the drugs shown in the following Table 3 have a drug concentration in the ultrafine fiber of 10% (some 30%) A spinning solution was prepared so that Using this spinning solution, a drug-containing ultrafine fiber laminate was produced in the same manner as in Reference Example 1. Immediately after the production of the obtained drug-containing ultrafine fiber laminate, the appearance after 60 ° C. for 3 days and after 60 ° C. for 5 days was observed with an electron microscope, evaluated according to the
<外観判定基準3>
(評価) (内容)
○ : 薬物含有超極細ファイバー積層体に、著しい外観不良が認められ ない状態
× : 薬物含有超極細ファイバー積層体に、著しい外観不良が認められ る状態
<
(Evaluation) (Content)
○: A state in which a marked appearance defect is not observed in the drug-containing ultrafine fiber laminate ×: A state in which a remarkable appearance defect is observed in the drug-containing ultrafine fiber laminate
<総合判定基準>
(評価) (内容)
A : 製造直後、60℃3日後、60℃5日後の何れも薬物含有超極細 ファイバー積層体の外観不良が認められない状態
B : 製造直後、60℃3日後は薬物含有超極細ファイバー積層体の外 観不良が認められない状態であり、60℃5日後は薬物含有超極 細ファイバー積層体の外観不良が認められる状態
C : 製造直後は薬物含有超極細ファイバー積層体の外観不良が認めら れない状態であり、60℃3日後、60℃5日後は薬物含有超極 細ファイバー積層体の外観不良が認められる状態
D : 製造直後、60℃3日後、60℃5日後の何れも薬物含有超極細 ファイバー積層体の外観不良が認められる状態
<Comprehensive criteria>
(Evaluation) (Content)
A: Immediately after production, 3 days after 60 ° C., and 5 days after 60 ° C. No appearance defect of drug-containing ultrafine fiber laminate B: Immediately after production, 3 days after 60 ° C. of drug-containing ultrafine fiber laminate Appearance failure is not observed, and appearance defect of drug-containing ultrafine fiber laminate after 5 days at 60 ° C C: Imperfect appearance of drug-containing ultrafine fiber laminate is observed immediately after production No state of appearance of the drug-containing ultrafine fiber laminate after 3 days at 60 ° C. and 5 days after 60 ° C. D: Immediately after production, 3 days after 60 ° C., 5 days after 60 ° C. Ultra-fine fiber laminates with poor appearance
以上の結果より、いずれの薬物含有超極細ファイバー積層体も安定であり、中でも特定の薬物および薬物濃度の条件で製されたものについては、苛酷な熱負荷にも耐えうることがわかった。 From the above results, it was found that any of the drug-containing ultrafine fiber laminates was stable, and those manufactured under specific drug and drug concentration conditions could withstand severe heat loads.
実 施 例 3
薬物含有超極細ファイバー積層体の製造:
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、以下の表4に記載の薬物を超極細ファイバー中の薬物濃度が10%となるように含有させ、更に、経皮吸収促進剤としてクロタミトンを超極細ファイバー中の経皮吸収促進剤濃度が2%、5%または10%となるように含有させた紡糸溶液を調製した。この紡糸溶液を用いて参考例1と同様にして薬物含有超極細ファイバー積層体を製造した。得られた薬物含有超極細ファイバー積層体について実施例2と同様にして総合判定した。その結果も表4に示した。
Example 3
Production of drug-containing ultrafine fiber laminate:
In a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%), the drug described in Table 4 below was contained so that the drug concentration in the ultrafine fiber was 10%. Furthermore, a spinning solution was prepared containing crotamiton as a transdermal absorption enhancer so that the concentration of the transdermal absorption enhancer in the ultrafine fiber was 2%, 5% or 10%. Using this spinning solution, a drug-containing ultrafine fiber laminate was produced in the same manner as in Reference Example 1. The obtained drug-containing ultrafine fiber laminate was comprehensively determined in the same manner as in Example 2. The results are also shown in Table 4.
以上の結果より、薬物含有超極細ファイバー積層体は経皮吸収促進剤を含有させても安定であることがわかった。 From the above results, it was found that the drug-containing ultrafine fiber laminate was stable even when a transdermal absorption enhancer was added.
実 施 例 4
薬物含有超極細ファイバー積層体の製造:
実施例3において、経皮吸収促進剤をクロタミトンからアジピン酸ジイソプロピルに代える以外は実施例3と同様にして薬物含有超極細ファイバー積層体を製造し、総合判定した。その結果を表5に示した。
Example 4
Production of drug-containing ultrafine fiber laminate:
In Example 3, a drug-containing ultrafine fiber laminate was produced and comprehensively determined in the same manner as in Example 3 except that the transdermal absorption enhancer was changed from crotamiton to diisopropyl adipate. The results are shown in Table 5.
以上の結果より、薬物含有超極細ファイバー積層体は経皮吸収促進剤を含有させても安定であることがわかった。 From the above results, it was found that the drug-containing ultrafine fiber laminate was stable even when a transdermal absorption enhancer was added.
実 施 例 5
薬物含有超極細ファイバー積層体の製造:
実施例3において、経皮吸収促進剤をクロタミトンからL-メントールに代える以外は実施例3と同様にして薬物含有超極細ファイバー積層体を製造し、総合判定した。その結果を表6に示した。
Example 5
Production of drug-containing ultrafine fiber laminate:
In Example 3, a drug-containing ultrafine fiber laminate was produced and comprehensively determined in the same manner as in Example 3 except that the transdermal absorption enhancer was changed from crotamiton to L-menthol. The results are shown in Table 6.
以上の結果より、薬物含有超極細ファイバー積層体は経皮吸収促進剤を含有させても安定であることがわかった。 From the above results, it was found that the drug-containing ultrafine fiber laminate was stable even when a transdermal absorption enhancer was added.
実 施 例 6
薬物含有超極細ファイバー積層体の製造:
実施例3において、経皮吸収促進剤をクロタミトンからモノカプリル酸プロピレングリコールに代える以外は実施例3と同様にして薬物含有超極細ファイバー積層体を製造し、総合判定した。その結果を表7に示した。
Example 6
Production of drug-containing ultrafine fiber laminate:
In Example 3, a drug-containing ultrafine fiber laminate was produced and comprehensively evaluated in the same manner as in Example 3 except that the transdermal absorption accelerator was changed from crotamiton to propylene glycol monocaprylate. The results are shown in Table 7.
以上の結果より、薬物含有超極細ファイバー積層体は経皮吸収促進剤を含有させても安定であることがわかった。 From the above results, it was found that the drug-containing ultrafine fiber laminate was stable even when a transdermal absorption enhancer was added.
実 施 例 7
薬物含有超極細ファイバー積層体の製造:
実施例3において、経皮吸収促進剤をクロタミトンからジカプリル酸プロピレングリコールに代える以外は実施例3と同様にして薬物含有超極細ファイバー積層体を製造し、総合判定した。その結果を表8に示した。
Example 7
Production of drug-containing ultrafine fiber laminate:
In Example 3, a drug-containing ultrafine fiber laminate was produced and comprehensively evaluated in the same manner as in Example 3 except that the transdermal absorption accelerator was changed from crotamiton to propylene glycol dicaprylate. The results are shown in Table 8.
以上の結果より、薬物含有超極細ファイバー積層体は経皮吸収促進剤を含有させても安定であることがわかった。 From the above results, it was found that the drug-containing ultrafine fiber laminate was stable even when a transdermal absorption enhancer was added.
実 施 例 8
放出試験:
(1)インドメタシン含有超極細ファイバー積層体
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、インドメタシンを超極細ファイバー中の濃度が表9に記載の量となるように含有させた紡糸溶液を調製した。これらの紡糸溶液を用いて参考例1と同様にしてインドメタシン含有超極細ファイバー積層体を製造した。これらのインドメタシン含有超極細ファイバー積層体を直径60mmの円形状に裁断したものを試験片とした。この試験片をトランスダーマルサンドイッチに挟み、その4箇所をクリップで留めた。これを試験液に水500mLを用い、日本薬局方の一般試験法である溶出試験法の第2法により毎分50回転で試験を行った(ただし、試験液の温度は32±0.5℃に、パドルの位置はパドルの下端と検体の放出面との距離が25±2mmになるように調整した。)。放出試験開始1、2、3、4および6時間後に放出液10mLを正確に量り採取後、直ちにあらかじめ32±0.5℃に加温しておいた試験液10mLを正確に加えた。採取した放出液を孔径0.5μm以下のメンブランフィルターでろ過したろ液を試料溶液とした。この試料溶液におけるインドメタシンの放出量を液体クロマトグラフィーを用いて求めた。また、試験片中に含まれるインドメタシン量は、試験片を細かく裁断した後、これに適量のメタノールを加えて抽出した液を試料溶液とし、液体クロマトグラフィーを用いて求めた。これらの値を用いて、下記式によりインドメタシンの放出率(%)を求めた。これもあわせて表9に示した。
Example 8
Release test:
(1) Indomethacin-containing superfine fiber laminate A polyurethane resin solution (polyurethane resin 14%, methylethylketone 23% and N, N-dimethylformamide 63%) is mixed with the amount of indomethacin in the ultrafine fiber as shown in Table 9. A spinning solution was prepared in such a manner. Using these spinning solutions, indomethacin-containing ultrafine fiber laminates were produced in the same manner as in Reference Example 1. These indomethacin-containing super extra fine fiber laminates were cut into a circular shape with a diameter of 60 mm to make test pieces. The test piece was sandwiched between transdermal sandwiches, and the four places were clipped. Using 500 mL of water as a test solution, the test was conducted at 50 rpm per second by the second method of the dissolution test method which is a general test method of the Japanese Pharmacopoeia (however, the temperature of the test solution was 32 ± 0.5 ° C. In addition, the position of the paddle was adjusted so that the distance between the lower end of the paddle and the specimen release surface was 25 ± 2 mm. After accurately measuring 10 mL of the
[数1]
インドメタシンの放出率(%)=[放出量(mg)/試験片中に含まれるインドメタシンの含有量(mg)]×100
[Equation 1]
Release rate of indomethacin (%) = [release amount (mg) / content of indomethacin contained in test piece (mg)] × 100
(2)市販品
3種の市販品(市販品1(パップ):インドメタシン0.5%含有、市販品2(油性プラスター):インドメタシン3.75%含有、市販品3(水性プラスター):インドメタシン1%含有)をそれぞれ直径60mmの円形状に裁断したものを試験片とする以外は上記(1)と同様にして放出試験を行い、インドメタシンの放出率(%)を求めた。これらの結果を表10に示した。
(2) Commercial products Three types of commercial products (commercial product 1 (pap): containing 0.5% indomethacin, commercial product 2 (oil-based plaster): containing 3.75% indomethacin, commercial product 3 (aqueous plaster): indomethacin 1 A release test was carried out in the same manner as in the above (1) except that a test piece was cut into a circular shape having a diameter of 60 mm, and the release rate (%) of indomethacin was determined. These results are shown in Table 10.
以上の結果より、インドメタシン含有超極細ファイバー積層体の放出率は最低でも6時間後に19%以上であるのに対して、市販品の放出率は最も良いものであっても6時間後で14%以下であった。しかも、インドメタシン含有超極細ファイバー積層体は1時間後から9%以上の高い放出率であった。 From the above results, the release rate of the indomethacin-containing ultrafine fiber laminate is at least 19% after 6 hours, whereas the release rate of the commercially available product is 14% after 6 hours even if the release rate is the best. It was the following. Moreover, the indomethacin-containing ultrafine fiber laminate had a high release rate of 9% or more after 1 hour.
実 施 例 9
放出試験:
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、ジフェンヒドラミンを超極細ファイバー中の濃度が表11に記載の量となるように含有させた紡糸溶液を調製した。これらの紡糸溶液を用いて参考例1と同様にしてジフェンヒドラミン含有超極細ファイバー積層体を製造した。これらのジフェンヒドラミン含有超極細ファイバー積層体について実施例8と同様にして放出試験を行い、ジフェンヒドラミンの放出率(%)を求めた。これらの結果をあわせて表11に示した。なお、試験片中に含まれるジフェンヒドラミン量は、試験片を細かく裁断した後、これに適量のメタノールを加えて抽出した液を試料溶液とし、液体クロマトグラフィーを用いて求めた。
Example 9
Release test:
A spinning solution was prepared by containing diphenhydramine in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber was as shown in Table 11. did. Using these spinning solutions, a diphenhydramine-containing ultrafine fiber laminate was produced in the same manner as in Reference Example 1. These diphenhydramine-containing ultrafine fiber laminates were subjected to a release test in the same manner as in Example 8 to obtain the diphenhydramine release rate (%). These results are shown together in Table 11. The amount of diphenhydramine contained in the test piece was determined by liquid chromatography using a sample solution obtained by adding an appropriate amount of methanol to the test piece after finely cutting the test piece.
以上の結果より、ジフェンヒドラミン含有超極細ファイバー積層体は1時間後から100%以上の高い放出率であった。そのため、ジフェンヒドラミン含有超極細ファイバー積層体は即効性製剤への利用の可能性が示唆された。 From the above results, the diphenhydramine-containing ultrafine fiber laminate had a high release rate of 100% or more after 1 hour. Therefore, it was suggested that diphenhydramine-containing ultrafine fiber laminates could be used for immediate-acting preparations.
実 施 例 10
放出試験:
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、リドカインを超極細ファイバー中の濃度が表12に記載の量となるように含有させた紡糸溶液を調製した。これらの紡糸溶液を用いて参考例1と同様にしてリドカイン含有超極細ファイバー積層体を製造した。これらのリドカイン含有超極細ファイバー積層体について実施例8と同様にして放出試験を行い、リドカインの放出率(%)を求めた。これらの結果をあわせて表12に示した。なお、試験片中に含まれるリドカイン量は、試験片を細かく裁断した後、これに適量のメタノールを加えて抽出した液を試料溶液として、液体クロマトグラフィーを用いて求めた。
Example 10
Release test:
A spinning solution was prepared by containing lidocaine in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber was as shown in Table 12. did. Lidocaine-containing ultrafine fiber laminates were produced in the same manner as in Reference Example 1 using these spinning solutions. These lidocaine-containing ultrafine fiber laminates were subjected to a release test in the same manner as in Example 8 to obtain the lidocaine release rate (%). These results are shown together in Table 12. The amount of lidocaine contained in the test piece was obtained by liquid chromatography using a sample solution obtained by adding an appropriate amount of methanol to the test piece after finely cutting the test piece.
以上の結果より、リドカイン含有超極細ファイバー積層体は1時間後から100%以上の高い放出率であった。そのため、リドカイン含有超極細ファイバー積層体は即効性製剤への利用の可能性が示唆された。 From the above results, the lidocaine-containing ultrafine fiber laminate had a high release rate of 100% or more after 1 hour. Therefore, it was suggested that lidocaine-containing ultrafine fiber laminates could be used for immediate-acting preparations.
実 施 例 11
放出試験:
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、インドメタシンを超極細ファイバー中の濃度が10%となるように含有させ、更に、経皮吸収促進剤としてクロタミトン、アジピン酸ジイソプロピル、L-メントール、モノカプリル酸プロピレングリコールまたはジカプリル酸プロピレングリコールを超極細ファイバー中の経皮吸収促進剤濃度が0%、2%、5%または10%となるように含有させた紡糸溶液を調製した。この紡糸溶液を用いて参考例1と同様にして薬物含有超極細ファイバーを製造した。これらの薬物含有超極細ファイバー積層体について実施例8と同様にして放出試験を行い、インドメタシンの放出率(%)を求めた。これらの結果をあわせて表13~17に示した。
Example 11
Release test:
Indomethacin is added to a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber becomes 10%, and further, as a percutaneous absorption accelerator. Crotamiton, diisopropyl adipate, L-menthol, propylene glycol monocaprylate or propylene glycol dicaprylate are added so that the concentration of the percutaneous absorption enhancer in the ultrafine fiber is 0%, 2%, 5% or 10%. A spinning solution was prepared. Using this spinning solution, a drug-containing ultrafine fiber was produced in the same manner as in Reference Example 1. These drug-containing superfine fiber laminates were subjected to a release test in the same manner as in Example 8 to determine the indomethacin release rate (%). The results are shown in Tables 13-17.
以上の結果より、経皮吸収促進剤は何れもインドメタシンの放出性を高められることができ、特にジカプリル酸プロピレングリコールがインドメタシンの放出性を著しく高めることがわかった。 From the above results, it was found that any of the percutaneous absorption enhancers can increase the release of indomethacin, and in particular, propylene glycol dicaprylate significantly increases the release of indomethacin.
実 施 例 12
放出試験:
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、ジフェンヒドラミンを超極細ファイバー中の濃度が10%となるように含有させ、更に、経皮吸収促進剤としてクロタミトン、アジピン酸ジイソプロピル、L-メントール、モノカプリル酸プロピレングリコールまたはジカプリル酸プロピレングリコールを、超極細ファイバー中のそれらの濃度が0%、2%、5%または10%となるように含有させた紡糸溶液を調製した。この紡糸溶液を用いて参考例1と同様にして薬物含有超極細ファイバーを製造した。これらの薬物含有超極細ファイバー積層体について実施例9と同様(ただし、試験液採取時間は、10、20、30、60、90および120分後に変えた)にして放出試験を行い、ジフェンヒドラミンの放出率(%)を求めた。これらの結果をあわせて表18~22に示した。
Example 12
Release test:
Diphenhydramine is contained in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber is 10%, and further, as a transdermal absorption accelerator. Spinning containing crotamiton, diisopropyl adipate, L-menthol, propylene glycol monocaprylate or propylene glycol dicaprylate so that their concentration in the ultrafine fiber is 0%, 2%, 5% or 10% A solution was prepared. Using this spinning solution, a drug-containing ultrafine fiber was produced in the same manner as in Reference Example 1. These drug-containing superfine fiber laminates were subjected to a release test in the same manner as in Example 9 (however, the test solution collection time was changed after 10, 20, 30, 60, 90, and 120 minutes) to release diphenhydramine. The rate (%) was determined. The results are shown in Tables 18-22.
以上の結果より、経皮吸収促進剤は何れもジフェンヒドラミンの放出性を高められることがわかった。 From the above results, it was found that any of the percutaneous absorption enhancers can enhance the release of diphenhydramine.
実 施 例 13
放出試験:
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、リドカインを超極細ファイバー中の濃度が10%となるように含有させ、更に、経皮吸収促進剤としてクロタミトン、アジピン酸ジイソプロピル、L-メントール、モノカプリル酸プロピレングリコールまたはジカプリル酸プロピレングリコールを、超極細ファイバー中のそれらの濃度が0%、2%、5%または10%となるように含有させた紡糸溶液を調製した。この紡糸溶液を用いて参考例1と同様にして薬物含有超極細ファイバーを製造した。これらの薬物含有超極細ファイバー積層体について実施例9と同様(ただし、試験液採取時間は、10、20、30、60、90および120分後に変えた)にして放出試験を行い、リドカインの放出率(%)を求めた。これらの結果をあわせて表23~27に示した。
Example 13
Release test:
Lidocaine is contained in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber becomes 10%, and as a percutaneous absorption accelerator. Spinning containing crotamiton, diisopropyl adipate, L-menthol, propylene glycol monocaprylate or propylene glycol dicaprylate so that their concentration in the ultrafine fiber is 0%, 2%, 5% or 10% A solution was prepared. Using this spinning solution, a drug-containing ultrafine fiber was produced in the same manner as in Reference Example 1. These drug-containing ultrafine fiber laminates were subjected to a release test in the same manner as in Example 9 (however, the test solution collection time was changed after 10, 20, 30, 60, 90, and 120 minutes) to release lidocaine. The rate (%) was determined. The results are shown in Tables 23 to 27.
以上の結果より、経皮吸収促進剤は何れもリドカインの放出性を高められることがわかった。 From the above results, it was found that any of the percutaneous absorption enhancers can enhance the release of lidocaine.
実 施 例 14
皮膚透過試験:
(1)インドメタシン含有超極細ファイバー積層体の製造
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、インドメタシンを超極細ファイバー中の濃度が10%となるように含有させ、更に、経皮吸収促進剤を超極細ファイバー中の濃度が表28に記載の量となるように含有させた紡糸溶液を調製した。これらの紡糸溶液を用いて参考例1と同様にしてインドメタシン含有超極細ファイバー積層体を製造した。
Example 14
Skin permeation test:
(1) Manufacture of indomethacin-containing super extra fine fiber laminate A concentration of indomethacin in the extra fine fiber is 10% in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%). In addition, a spinning solution containing a percutaneous absorption enhancer was added so that the concentration in the ultrafine fiber was as shown in Table 28 was prepared. Using these spinning solutions, indomethacin-containing ultrafine fiber laminates were produced in the same manner as in Reference Example 1.
(2)皮膚透過試験
(1)で製造したインドメタシン含有超極細ファイバー積層体の2、4、6および24時間後の累積透過率を以下のようにして測定した。また、比較として、実施例8で用いた市販品1~3についても同様に累積透過率(%)を測定した。これらの結果もあわせて表28に示した。
(2) Skin Permeation Test The cumulative transmittance after 2, 4, 6, and 24 hours of the indomethacin-containing superfine fiber laminate produced in (1) was measured as follows. For comparison, the cumulative transmittance (%) was also measured for the
(試験方法)
1)前日にバリカンおよび電気シェーバーを用いて腹部の毛を処理した ラットの腹部皮膚を摘出した。
2)摘出した皮膚をFranz-typeセルに取り付けた。
3)真皮側のセルにレセプター液を、表皮側にあらかじめ円形状(直径 10mm)に裁断した検体を皮膚に貼付後、その上に円型のシリコ ン板を置き、それらをドナーセルで挟み込み、クランプにて固定し た。
4)直ちにセル内にレセプター液4mLを入れ、この時間を0時間とし た。
5)以後、2、4、6および24時間後にレセプター液1mLを採取し 、その直後に同量のレセプター液を加えた。採取したレセプター液 のインドメタシン濃度を液体クロマトグラフィーにて測定し、累積 透過率を算出した。
(Test method)
1) The abdominal skin of a rat treated with a hair clipper and an electric shaver on the previous day was removed.
2) The extracted skin was attached to a Franz-type cell.
3) The receptor liquid is applied to the dermis side cell, and the specimen cut into a circular shape (diameter 10mm) is applied to the skin in advance, and a circular silicon plate is placed on the skin. Fixed with.
4) Immediately, 4 mL of the receptor solution was placed in the cell, and this time was set to 0 hour.
5) Thereafter, 1 mL of the receptor solution was collected after 2, 4, 6 and 24 hours, and immediately after that, the same amount of the receptor solution was added. The concentration of indomethacin in the collected receptor fluid was measured by liquid chromatography, and the cumulative transmittance was calculated.
(標準溶液の調製)
インドメタシン約0.2gを精密に量り、アセトニトリルに溶かし、正確に100mLとした。この液5mLを正確に量り、レセプター液を加えて正確に100mLとし、検量線用標準溶液Aとした。検量線用標準溶液A5mLを正確に量り、レセプター液を加えて正確に50mLとし、検量線用標準溶液Bとした。検量線用標準溶液B2mLを正確に量り、レセプター液を加えて正確に20mLとし、検量線用標準溶液Cとした。検量線用標準溶液C1mL正確に量り、レセプター液を加えて正確に20mLとし、検量線用標準溶液Dとした。検量線用標準溶液D1mLを正確に量り、レセプター液を加えて正確に100mLとし、検量線用標準溶液Eとした。
(Preparation of standard solution)
About 0.2 g of indomethacin was accurately weighed and dissolved in acetonitrile to make exactly 100 mL. 5 mL of this solution was accurately weighed, and the receptor solution was added to make exactly 100 mL, which was used as a standard solution A for a calibration curve. A standard curve standard solution A (5 mL) was accurately weighed, and the receptor solution was added to make exactly 50 mL to obtain a standard curve standard solution B. A standard curve standard solution B (2 mL) was accurately weighed and the receptor solution was added to make exactly 20 mL, thereby preparing a standard curve standard solution C. Calibration curve standard solution C was accurately measured and 1 mL of receptor solution was added to make exactly 20 mL. A standard curve standard solution D (1 mL) was accurately weighed, and the receptor solution was added to make exactly 100 mL.
(試料溶液の調製)
採取したレセプター液を遠心分離し(3,000rpm×10分)、上澄み液を試料溶液とした。
(Preparation of sample solution)
The collected receptor solution was centrifuged (3,000 rpm × 10 minutes), and the supernatant was used as a sample solution.
(液体クロマトグラフィーの試験条件)
検出器:紫外吸光光度計(測定波長:320nm)
カラム:内径4.6mm、長さ15cmのステンレス管に5μmの液体 クロマトグラフィー用オクタデシリシリル化シリカゲルを充てん した。
カラム温度:40℃付近の一定温度
移動相:アセトニトリル/0.1mol/L酢酸混液(3:2)
流量:1.000mL/min
注入量:80μL
(Test conditions for liquid chromatography)
Detector: UV absorptiometer (measurement wavelength: 320 nm)
Column: A stainless steel tube having an inner diameter of 4.6 mm and a length of 15 cm was packed with 5 μm of octadecylsilylated silica gel for liquid chromatography.
Column temperature: constant temperature around 40 ° C. Mobile phase: acetonitrile / 0.1 mol / L acetic acid mixture (3: 2)
Flow rate: 1.000 mL / min
Injection volume: 80 μL
(計算方法)
1)2時間後の採取時におけるインドメタシンの累積透過量(μg)= 検量線より算出した濃度(μg/mL)×セル内のレセプター 液量(mL)
2)4時間後の採取時におけるインドメタシンの累積透過量(μg)= 検量線より算出した濃度(μg/mL)×セル内のレセプター 液量(mL)+2時間後の採取時におけるインドメタシンの累積 透過量(μg)×(採取したレセプター液量(mL)/セル内の レセプター液量(mL))
3)Y時間後の採取時におけるレセプター液接触面積当たりのインドメ タシンの透過率(%)=Y時間後の採取時におけるインドメタシ ンの累積透過量(μg)×(1/セル内のレセプター液接触面積 中のインドメタシンの量(μg))×100
4)セル内のレセプター液接触面積中のインドメタシンの量(μg)= 直径60mmの円形中のインドメタシン含量(mg)(実測 含量)×(直径1cmの円の面積(cm2))※1/
直径6cmの円の面積(cm2)※2)×1000
※1:直径1cmの円の面積は0.5(cm)×0.5(cm)×3.14=0.785(cm2)とした。
※2:直径6cmの円の面積は3(cm)×3(cm)×3.14=28.26(cm2)とした。
(Method of calculation)
1) Cumulative permeation amount of indomethacin at the time of collection after 2 hours (μg) = concentration calculated from calibration curve (μg / mL) × receptor fluid volume in the cell (mL)
2) Cumulative permeation amount of indomethacin at the time of collection after 4 hours (μg) = Concentration calculated from the calibration curve (μg / mL) × receptor fluid volume in the cell (mL) + cumulative permeation of indomethacin at the time of collection after 2 hours Amount (μg) x (collected receptor fluid volume (mL) / receptor fluid volume in the cell (mL))
3) Permeation rate (%) of indomethacin per receptor fluid contact area at the time of collection after Y time = cumulative permeation amount of indomethacin (μg) at the time of collection after Y time × (1 / receptor fluid contact in the cell) Amount of indomethacin in area (μg)) × 100
4) Amount of indomethacin in the receptor liquid contact area in the cell (μg) = indomethacin content (mg) in a circle with a diameter of 60 mm (actual content) × (area of a circle with a diameter of 1 cm (cm 2 )) * 1 /
6cm diameter circle area (cm 2 ) * 2 ) × 1000
* 1: The area of a circle with a diameter of 1 cm was 0.5 (cm) × 0.5 (cm) × 3.14 = 0.785 (cm 2 ).
* 2: The area of a circle with a diameter of 6 cm was 3 (cm) × 3 (cm) × 3.14 = 28.26 (cm 2 ).
以上の結果より、インドメタシン含有超極細ファイバー積層体の累積透過率は最低でも24時間後に30%以上であるのに対して、市販品の累積透過率は最も良いものであっても24時間後で6%以下であった。超極細ファイバー積層体の使用によって、市販製剤よりも高い累積透過率を得ることができることがわかった。 From the above results, the cumulative transmittance of the indomethacin-containing ultrafine fiber laminate is at least 30% after 24 hours, whereas the commercial product has the best cumulative transmittance after 24 hours. It was 6% or less. It has been found that a cumulative transmittance higher than that of a commercially available preparation can be obtained by using a superfine fiber laminate.
実 施 例 15
皮膚外用剤の製造:
ポリウレタン樹脂溶液(ポリウレタン樹脂14%、メチルエチルケトン23%およびN,N-ジメチルホルムアミド63%)に、インドメタシンを超極細ファイバー中の濃度が10%となるように含有させた紡糸溶液を調製する。この紡糸溶液を用いて参考例1と同様にしてインドメタシン含有超極細ファイバー積層体を製造する。このインドメタシン含有超極細ファイバー積層体を5cm×5cmの大きさに切り取る。次にこれを粘着剤を塗布した6cm×6cmのプラスチックフィルムの真ん中に貼り付け、最後に前記プラスチックフィルムと同じ大きさの保護フィルムを貼り付けて皮膚外用剤を作製する。この皮膚外用剤は、使用時に保護フィルムを剥がした後、皮膚に適用する。
Example 15
Production of topical skin preparation:
A spinning solution is prepared by containing indomethacin in a polyurethane resin solution (polyurethane resin 14%, methyl ethyl ketone 23% and N, N-dimethylformamide 63%) so that the concentration in the ultrafine fiber becomes 10%. Using this spinning solution, an indomethacin-containing ultrafine fiber laminate is produced in the same manner as in Reference Example 1. This indomethacin-containing ultrafine fiber laminate is cut into a size of 5 cm × 5 cm. Next, this is pasted in the middle of a 6 cm × 6 cm plastic film coated with an adhesive, and finally a protective film having the same size as the plastic film is pasted to produce a skin external preparation. This external preparation for skin is applied to the skin after peeling off the protective film at the time of use.
本発明の薬物含有超極細ファイバーやその積層体は、薬物利用能が高いので皮膚適用剤に利用可能である。 Since the drug-containing ultrafine fiber and the laminate thereof of the present invention have high drug availability, they can be used as a skin application agent.
1 超極細ファイバー製造装置
2 紡糸溶液タンク
3 ノズル
4 高電圧電源
5 コレクター
6 導電性薄膜
7 プラスの電荷を有する紡糸溶液
8 薬物含有超極細ファイバー
9 薬物含有超極細ファイバー積層体
DESCRIPTION OF
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| CN108697637A (en) | 2016-01-27 | 2018-10-23 | 因斯塔尔科技股份公司 | Oral mucosa nano fibre carrier for therapeutic treatment |
| KR101939822B1 (en) * | 2016-12-19 | 2019-01-18 | 경희대학교 산학협력단 | Method of producing a nerve electrode |
| JP6853978B2 (en) * | 2017-03-01 | 2021-04-07 | 富山県 | Pest repellent ultra-fine fiber sheet and its manufacturing method |
| CN108904858A (en) * | 2018-07-27 | 2018-11-30 | 西北师范大学 | A kind of polyvinyl alcohol/trifluoroacetic acid lappaconitine composite cellulosic membrane and its preparation and application |
| CN113950336A (en) | 2020-02-07 | 2022-01-18 | 花王株式会社 | Composition for external application to skin |
| JP6997890B2 (en) * | 2020-02-07 | 2022-01-18 | 花王株式会社 | External composition for skin |
| WO2023145886A1 (en) * | 2022-01-31 | 2023-08-03 | 三菱ケミカル株式会社 | Nanofibers |
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| JP4943643B2 (en) * | 2004-10-29 | 2012-05-30 | テイカ製薬株式会社 | Transdermal absorption preparation |
| JP5345813B2 (en) * | 2008-08-28 | 2013-11-20 | テイカ製薬株式会社 | Oxycodone transdermally absorbable pharmaceutical composition, pharmaceutical composition storage unit, and transdermally absorbable preparation using the same |
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| JPH02280771A (en) * | 1989-04-24 | 1990-11-16 | Descente Ltd | Transdermal sustained drug release fibers and clothing materials composed of transdermal sustained drug release fibers |
| WO1996011002A1 (en) * | 1994-10-05 | 1996-04-18 | Hisamitsu Pharmaceutical Co., Inc. | Antiinflammatory agent for external use |
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