WO2015159942A1 - アニオン性薬物含有医療用デバイス - Google Patents
アニオン性薬物含有医療用デバイス Download PDFInfo
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- WO2015159942A1 WO2015159942A1 PCT/JP2015/061670 JP2015061670W WO2015159942A1 WO 2015159942 A1 WO2015159942 A1 WO 2015159942A1 JP 2015061670 W JP2015061670 W JP 2015061670W WO 2015159942 A1 WO2015159942 A1 WO 2015159942A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0048—Eye, e.g. artificial tears
- A61K9/0051—Ocular inserts, ocular implants
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—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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- 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
- A61K31/33—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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/56—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids
- A61K31/57—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane or progesterone
- A61K31/573—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids substituted in position 17 beta by a chain of two carbon atoms, e.g. pregnane or progesterone substituted in position 21, e.g. cortisone, dexamethasone, prednisone or aldosterone
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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
- A61K31/66—Phosphorus compounds
- A61K31/661—Phosphorus acids or esters thereof not having P—C bonds, e.g. fosfosal, dichlorvos, malathion or mevinphos
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/06—Ointments; Bases therefor; Other semi-solid forms, e.g. creams, sticks, gels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P27/00—Drugs for disorders of the senses
- A61P27/02—Ophthalmic agents
Definitions
- the present invention relates to an anionic drug-containing medical device.
- Vitreous injection and insertion of punctal plugs are invasive treatments, and thus have the problem of being accompanied by pain and a foreign body sensation.
- drug administration has a problem that the desired effect cannot be obtained depending on the amount and method of administration of the drug.
- Various attempts have been made to administer drugs with therapeutic effects.
- DDS drug delivery system
- a polymer gel applicable as a contact lens containing a therapeutic drug a polymer gel that adsorbs and holds an anionic drug on a polymer gel having a quaternary ammonium salt in the side chain (see Patent Document 1 below, the document) Is incorporated herein by reference), and the molar ratio of the anionic monomer and the cationic monomer, which are constituents of the hydrogel, is biased, and the anionic drug is ionically bonded to the surplus cationic monomer.
- Polymer gels see Patent Document 2 below, the entire description of which is incorporated herein by reference) are known.
- a cationic monomer having a cationic group is blended as a constituent component of the polymer gel substrate, and an anionic therapeutic drug is bound to the cationic group by ionic bonding. It is composed by doing.
- the blending amount of the cationic monomer in order to increase the amount of the therapeutic drug encapsulated in the polymer gel, the blending amount of the cationic monomer must be increased.
- the polymer gel after releasing the encapsulated drug is likely to be defective in shape.
- the shape before drug release is stable due to the interaction between the polymer gel substrate and the drug, but after the drug is released, the interaction The shape deteriorates due to the loss of.
- the amount of the cationic monomer is large, the shape deterioration after drug release appears significantly.
- the polymer gel described in Patent Document 2 has an anionic monomer as a constituent component in addition to the cationic monomer.
- the anionic monomer and the cationic monomer are bonded by electrostatic interaction, and the compounded ratio of the anionic monomer and the cationic monomer is not greatly shifted, so the encapsulated drug is released. Even after this, the shape of the polymer gel does not deteriorate.
- the polymer gel described in Patent Document 2 has a problem that the amount of drug that can be included is limited.
- the polymer gels described in Patent Documents 1 and 2 are those in which the amount of drug encapsulated is limited. If an attempt is made to increase the amount of encapsulated drug, the gel strength decreases, the drug is released. There is a possibility that problems such as lowering of shape stability will occur later.
- An object of the present invention is to provide a polymer gel that can be used and a drug-containing medical device to which the polymer gel is applied.
- the present inventors proceeded with intensive research and examined the relationship between the structure of a cationic monomer and the water content and shape stability, and an alkyl quaternary ammonium compound having an aralkyl group and (meta ) It came to pay attention to the condensate of acrylic acid.
- the condensate suppresses an increase in the moisture content of the resulting polymer gel substrate even when it is blended in a high ratio as a component of the polymer gel substrate due to the hydrophobic effect of the benzene ring in the molecule. Can be expected. Therefore, an anionic drug-containing gel was prepared using the condensate as a cationic monomer. As a result, the polymer gel described in Patent Documents 1 and 2 had a problem with the increase in the amount of the cationic monomer added. We succeeded in suppressing the increase in the moisture content of the molecular gel substrate and the decrease in the substrate strength that seems to be caused by this. It was also found that the release rate of the encapsulated drug can be controlled by the repulsive action with the hydrophilic drug.
- an anionic drug (1) an anionic drug; and (2) an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and a condensate of (meth) acrylic acid or a salt thereof as a constituent component.
- an anionic drug-containing medical device comprising a cationic monomer containing and a copolymer containing a monomer copolymerizable therewith.
- the condensate of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth) acrylic acid is preferably represented by the following general formula (I): (I) (Where R 1 represents a hydrogen atom or CH 3 ; 1 to 3 of R 2 to R 4 are each independently represented by the following general formula (II) (II) (Wherein x represents an integer of 1 to 3; and R 5 to R 9 each independently represents a hydrogen atom or a C 1 to C 6 linear or branched hydrocarbon group) And the remaining 2 to 0 of them represent a C 1 to C 3 linear or branched hydrocarbon group; and n represents an integer of 1 to 4) It is a compound shown by these.
- the copolymer of (2) further contains a hydrophilic monomer as a constituent component, and the anionic drug-containing medical device is a hydrogel.
- the amount of the cationic monomer is preferably 0.5 to 20 mol% with respect to 1 mol of the hydrophilic monomer.
- the anionic drug is dexamethasone sodium phosphate or sodium cromoglycate.
- the anionic drug-containing medical device of the present invention by using a condensate of an alkyl quaternary ammonium compound having an aralkyl group and (meth) acrylic acid as a constituent component, the cationic monomer is increased. Excellent shape stability without degrading the strength of the gel base material and even after releasing the encapsulated anionic drug, even if an anionic drug is encapsulated at a high concentration It is possible to show gender.
- the anionic drug-containing medical device of the present invention it is possible to effectively treat eye diseases, and further, since the shape change before and after the release of the anionic drug is small, it is possible to feel foreign objects during wearing and optical It can be expected to suppress adverse effects on characteristics.
- 6 is a graph showing the relationship between the monomer amount of a cationic monomer and the amount of drug uptake for Examples (1) to (4) and Comparative Examples (1) to (4). 6 is a graph showing the relationship between the monomer amount of a cationic monomer and the drug uptake amount of a unit cationic monomer for Examples (1) to (3) and Comparative Examples (1) to (3).
- the anionic drug-containing medical device of the present invention includes at least (1) an anionic drug and (2) a copolymer.
- the copolymer of (2) includes a cationic monomer containing a condensate of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth) acrylic acid or a salt thereof as a constituent component. And at least a polymerizable monomer.
- the anionic drug-containing medical device of the present invention is a condensate of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth) acrylic acid as a component of a medical device that is a carrier for an anionic drug. It is characterized by blending a cationic monomer containing Since the condensate of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth) acrylic acid has a hydrophobic effect, the water content of the medical device even when blended in a high ratio as a polymerization component Does not increase significantly.
- the technical scope of the present invention is not limited to any speculation, but the medical device of the present invention has a high proportion of the cationic monomer, which increases the amount of drug contained.
- the increase in the moisture content can be reduced, it is possible to prevent the strength of the device itself from being lowered and the drug contained therein from being released at a high concentration in the initial stage.
- the medical device of the present invention can be used even after releasing the drug encapsulated at a high concentration. Almost no change in shape is seen, showing excellent shape stability.
- the cationic monomer used in the present invention contains at least an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and a condensate of (meth) acrylic acid or a salt thereof.
- a condensate of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth) acrylic acid is one of the alkyl groups of a quaternary ammonium compound consisting of a substituted or unsubstituted aralkyl group and an alkyl group; There is no particular limitation as long as it forms a structure condensed on the outer shape with the carboxyl group of (meth) acrylic acid.
- a method for producing a condensate of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth) acrylic acid is not particularly limited, and an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meta ) Not only a method of producing by condensing with acrylic acid, but also resulting in an externally condensed structure of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth) acrylic acid.
- a manufacturing method may be used.
- methacryloxyethyldimethylbenzylammonium chloride which is a specific example of a salt of a condensate of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth) acrylic acid, is available from MRC Unitech. Further, it can be produced with reference to Japanese Patent Application Laid-Open No. 2001-106732 (the entire description of the document is incorporated herein by reference).
- the cationic monomer may be a mixture of a condensate of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth) acrylic acid or a salt thereof and a monomer having another cationic group.
- R 1 is a hydrogen atom or CH 3 ; one of R 2 to R 4 is a benzyl group, and the rest Are CH 3 or C 2 H 5 ; n is a compound having an integer of 1 to 2, more preferably methacryloxyethyldimethylbenzylammonium chloride.
- the amount of the cationic monomer is not particularly limited as long as the device can maintain a certain shape.
- the amount of the cationic monomer is several mol% to several tens mol with respect to the amount of the hydrophilic monomer as the second polymerization component described later. %.
- the specific blending amount of the cationic monomer is preferably in a range not exceeding 30 mol% with respect to 1 mol of the hydrophilic monomer, for example, 0.5 to 20 mol% (0.005 to 0.2 mol). In the range of 0.5 to 10 mol% (0.005 to 0.1 mol).
- the blending amount of the cationic monomer is less than 0.5 mol%, the amount of the anionic drug that can be encapsulated decreases, and an anionic drug-containing medical device having a therapeutic effect may not be configured.
- the compounding quantity of a cationic monomer exceeds 30 mol%, the moisture content of the obtained medical device will increase, the shape will not be stable, and sufficient strength when used as a medical device will be maintained. Therefore, the feeling of wearing may be impaired.
- the anionic drug-containing medical device of the present invention can be made into a hydrogel by blending a hydrophilic monomer as the second polymerization component in addition to the cationic monomer.
- the hydrophilic monomer is not particularly limited as long as it is a polymerizable compound having at least one hydrophilic group and (meth) acryloyl group or vinyl group in the molecule.
- hydroxymethyl (meth) acrylate, 2-hydroxy Ethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2,3-dihydroxypropyl (meth) acrylate and 2-polyethylene glycol mono (meth) acrylate, 2-polypropylene glycol (meth) acrylate, N, N-dimethyl (Meth) acrylamide, N, N-diethyl (meth) acrylamide, N-vinylpyrrolidone and the like can be mentioned.
- the hydrophilic monomer one of these can be used alone, or two or more can be mixed and blended.
- the blending amount of the hydrophilic monomer is not particularly limited as long as the polymer obtained by copolymerization can form a hydrogel, but is, for example, 50 to 90 wt% in the total polymerization components, preferably 60 to 80 wt%.
- the compounding quantity of a hydrophilic monomer is less than 50 wt%, the softness
- the compounding quantity of a hydrophilic monomer exceeds 90 wt%, there exists a possibility that a sufficient quantity of a cationic monomer cannot be mix
- a hydrophobic monomer can be blended in order to control the outflow rate of the anionic drug into the tear fluid.
- the hydrophobic monomer is not particularly limited as long as it is a polymerizable compound having no hydrophilic group in the molecule and having one or more (meth) acryloyl groups or vinyl groups, for example, trifluoroethyl methacrylate.
- (Meth) acrylic monomers such as methacrylamide, siloxanyl methacrylate, methyl methacrylate, n-butyl methacrylate, tert-butyl methacrylate, benzyl methacrylate, ethylhexyl methacrylate, lauryl (meth) acrylate; and ⁇ -mono (methacryloyl) Oxymethyl) polydimethylsiloxane, ⁇ , ⁇ -di (methacryloxymethyl) polydimethylsiloxane, ⁇ -mono (3-methacryloyloxypropyl) polydimethylsiloxane, ⁇ , ⁇ -di (3-methacryloyloxypropyl) polydi Tilsiloxane, ⁇ -mono (3-methacryloyloxybutyl) polydimethylsiloxane, ⁇ , ⁇ -di (3-methacryloyloxybutyl) polydimethylsi
- the blending amount of the hydrophobic monomer in the medical device of the present invention is not particularly limited. For example, it is 0 to 30 wt%, preferably 0 to 20 wt% in the total polymerization components. When the blending amount of the hydrophobic monomer exceeds 30 wt%, it is not preferable because the softness of the obtained medical device is lowered and the wearing feeling may be impaired.
- a crosslinkable monomer can be blended in order to adjust the formation of the network structure of the polymer gel and the mechanical strength.
- the crosslinkable monomer is not particularly limited as long as it is a compound having two or more (meth) acryl groups or vinyl groups in the molecule.
- ethylene glycol di (meth) acrylate, methylene bis (meth) acrylamide, 2-hydroxy 1,3-di (meth) acryloxypropane, trimethylolpropane tri (meth) acrylate and the like As the crosslinkable monomer, one of these can be used alone, or two or more can be mixed and blended.
- the amount of the crosslinkable monomer is not particularly limited, but is, for example, 0.3 to 10 mol%, preferably 0.7 to 3 mol%, based on the total mol of the polymerization components.
- the blending amount of the crosslinkable monomer exceeds 10 mol%, the softness as the obtained anionic drug-containing medical device is lowered, and the feeling of wearing may be impaired.
- the medical device of the present invention can be manufactured by combining processes known by those skilled in the art, and the manufacturing method is not particularly limited, but can include, for example, the following processes: A step of adding a polymerization initiator to a mixture of monomers constituting an anionic drug-containing medical device, and stirring and dissolving to obtain a monomer mixture; the obtained monomer mixture is placed in a desired mold and copolymerized A step of obtaining a copolymer by reaction; a step of cooling and peeling the copolymer from a mold, cutting and polishing as necessary, and then hydrating and swelling the molded copolymer to obtain a hydrogel; and A step of immersing the obtained hydrogel in a solution in which a drug is dissolved to obtain an anionic drug-containing medical device in which the drug is held inside the hydrogel.
- Polymerization initiators include peroxide polymerization initiators such as lauroyl peroxide, cumene hydroperoxide, and benzoyl peroxide, which are general radical polymerization initiators; azobisdimethylvaleronitrile, azobisisobutyronitrile, etc. These azo polymerization initiators can be used alone or in combination of two or more.
- the addition amount of the polymerization initiator is not particularly limited as long as it is a sufficient amount for accelerating the copolymerization reaction of the monomer.
- the monomer mixture is put in a metal, glass, plastic or other mold, sealed, heated in a constant temperature bath or the like stepwise or continuously in the range of 25 to 120 ° C., 5 to This can be done by completing the polymerization in 120 hours.
- a constant temperature bath or the like stepwise or continuously in the range of 25 to 120 ° C., 5 to This can be done by completing the polymerization in 120 hours.
- ultraviolet rays, electron beams, gamma rays, and the like can be used.
- solution polymerization can be adapted by adding water or an organic solvent to the monomer mixture.
- the mixture is cooled to room temperature, and the obtained polymer is peeled from the mold, cut and polished as necessary, and then hydrated and swollen to obtain a hydrogel.
- the liquid (swelling liquid) to be used include water, physiological saline, isotonic buffer and the like.
- the swelling liquid is heated to 60 to 100 ° C. and immersed for a certain time to obtain a swollen state. Further, it is preferable to remove unpolymerized monomers contained in the polymer during the swelling treatment.
- the step of obtaining an anionic drug-containing medical device is performed by immersing the hydrogel obtained through the above-described process in a solution in which the anionic drug is dissolved, and subjecting it to steam sterilization at high temperature and high pressure.
- the anionic drug is retained in the hydrogel by ionic bonding with a cationic group imparted by a cationic monomer that is a constituent of the hydrogel.
- it can also serve as a high-pressure steam sterilization treatment.
- the anionic drug-containing medical device of the present invention can be safely and soundly worn, There is an effect that one step can be omitted.
- the anionic drug is not particularly limited as long as it is a drug having an anionic group such as a sulfo group, a carboxyl group, and a phosphate group.
- Preferred examples of the drug having a sulfo group include sodium azulene sulfonate, sodium dexamethasone metasulfobenzoate, and sodium chondroitin sulfate.
- the drug having a carboxyl group is preferably sodium cromoglycate, potassium cromoglycate, bromfenac sodium, diclofenac sodium, valsartan, dexamethasone phosphate sodium, betamethasone phosphate sodium, moxifloxacin, amlexanox, pranoprofen , Norfloxacin, ofloxacin, sodium hyaluronate, sodium chondroitin sulfate and the like.
- Preferred examples of the drug having a phosphate group include dexamethasone phosphate sodium and betamethasone phosphate sodium. In the present invention, one or more of these anionic drugs can be used.
- the solvent for dissolving the drug is not particularly limited, and examples thereof include water, a hydrophilic solvent, a mixed solvent of water and a hydrophilic solvent, and the like.
- the hydrophilic solvent is not particularly limited, and examples thereof include alcohols such as ethanol, methanol, isopropanol, and n-butanol, dimethyl sulfoxide, and a buffer solution.
- the concentration of the drug contained in the drug solution is not particularly limited, and can be appropriately set depending on each drug, for example, the solubility of the drug, the minimum effective concentration for exhibiting a therapeutic effect, and the maximum safe concentration.
- the anionic drug-containing medical device of the present invention can be used for various applications by processing the shape.
- an ophthalmic lens such as a contact lens can be obtained by providing a curvature.
- a drug can be efficiently delivered from the sclera surface to a posterior ocular tissue.
- it if it is in sheet form, it can be used as a wound dressing or poultice.
- HEMA 2-hydroxyethyl methacrylate
- MOEBAC methacryloxyethyldimethylbenzylammonium chloride
- MAPTAC methacrylamidopropyltrimethylammonium chloride
- AIBN azobisisobutyronitrile
- DSP dexamethasone sodium phosphate
- DSCG cromoglyc Acid sodium
- Comparative Examples (1) to (7) although the cationic monomer is blended in the same molar ratio as in the Examples, the cationic monomer used does not have a benzene ring in the molecule. Since the increase rate of the moisture content is as large as 53.1% compared to the examples, the strength of the device is remarkably reduced (decrease rate 67.4%), and the shape stability after releasing the anionic drug is further reduced. There was a trend.
- FIG. 2 is a graph showing the relationship between the monomer amount of the cationic monomer and the drug uptake amount of the unit cationic monomer for Examples (1) to (3) and Comparative Examples (1) to (3). It is. From FIG. 2, it can be seen that the Example has a smaller influence of the amount of the unit cationic monomer drug uptake due to the amount of the cationic monomer compared to the comparative example. Therefore, compared with the comparative example, the examples can stably increase the drug uptake by changing the monomer amount of the cationic monomer, and the design of the medical device having a desired drug uptake amount and It was shown that it was easy to manufacture.
- the device of the present invention by using a cationic monomer having a benzene ring in the molecule as a component of the drug carrier, it is encapsulated without causing an increase in water content or a decrease in strength. Since the amount of the drug can be increased, a medical device having both shape stability after drug release and high therapeutic effect can be provided.
- the medical device of the present invention is a drug-containing medical device that can be controlled to a desired drug uptake amount and has excellent gel strength and shape stability after drug release, it is safe and excellent for the wearer. It can contribute to the health and well-being of civilization that can provide therapeutic effects.
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Abstract
Description
(式中、
R1は水素原子又はCH3を表わし;
R2~R4は、そのうち1~3個がそれぞれ独立して下記一般式(II)
(式中、xは1~3の整数を表わし;及び、R5~R9はそれぞれ独立して水素原子又はC1~C6の直鎖状若しくは分岐鎖状の炭化水素基を表わす)
で表わされる官能基を表わし、かつ、そのうち残りの2~0個がC1~C3の直鎖状若しくは分岐鎖状の炭化水素基を表わし;及び、
nは1~4の整数を表わす)
で示される化合物である。
本発明のアニオン性薬物含有医療用デバイスは、(1)アニオン性薬物及び(2)共重合体を少なくとも含む。上記(2)の共重合体は、構成成分として、置換又は非置換のアラルキル基を有するアルキル4級アンモニウム化合物及び(メタ)アクリル酸の縮合物又はその塩を含むカチオン性モノマーと、これらと共重合可能なモノマーとを少なくとも含む。
(式中、
R1は水素原子又はCH3を表わし;
R2~R4は、そのうち1~3個がそれぞれ独立して下記一般式(II)
(式中、xは1~3の整数を表わし;及び、R5~R9はそれぞれ独立して水素原子又はC1~C6の直鎖状若しくは分岐鎖状の炭化水素基を表わす)
で表わされる官能基を表わし、かつ、そのうち残りの2~0個がC1~C3の直鎖状若しくは分岐鎖状の炭化水素基を表わし;及び、
nは1~4の整数を表わす)
で示される化合物が挙げられる。上記一般式(I)の化合物のうち、本発明に好適に用いられるものは、例えば、R1が水素原子又はCH3であり;R2~R4はそのうち1個がベンジル基であり、残りの2個がCH3又はC2H5であり;nは1~2の整数である化合物であり、より好ましくはメタクリルオキシエチルジメチルベンジルアンモニウムクロライドである。
アニオン性薬物含有医療用デバイスを構成するモノマーの混合物に重合開始剤を添加し、撹拌及び溶解することによりモノマー混合液を得る工程;得られたモノマー混合液を所望の成形型に入れ、共重合反応により共重合体を得る工程;共重合体を冷却及び成形型から剥離し、必要に応じて切削、研磨した後に、成形した共重合体を水和膨潤させてハイドロゲルを得る工程;及び、得られたハイドロゲルを、薬物を溶解させた溶液中に浸漬して、ハイドロゲルの内部に薬物を保持させたアニオン性薬物含有医療用デバイスを得る工程。
2-ヒドロキシエチルメタクリレート(HEMA)と、HEMA1モルに対し後述する表1に示す割合のメタクリルオキシエチルジメチルベンジルアンモニウムクロライド(MOEBAC)とを含む混合物に、モノマー総モルに対し1モル%のポリエチレングリコールジアクリレート(A-200)及びモノマーの総重量に対し3000ppm(外部)のアゾビスイソブチロニトリル(AIBN)を加え、撹拌混合してモノマー混合液を得た。得られたモノマー混合液を成形型に入れ、30~110℃の範囲で17時間かけて昇温させて共重合反応に供することにより、重合体を得た。得られた重合体を室温に戻し、成形型より取出した後、60℃のエタノール含有リン酸緩衝液、次いでリン酸緩衝液中に各々1時間浸漬させ、さらに室温で純水に、2時間以上浸漬させることにより、水和膨潤したハイドロゲルを得た。得られたハイドロゲルを、実施例(1)~(4)、(7)、(8)についてはデキサメタゾンリン酸エステルナトリウム(DSP)0.2wt%水溶液に、実施例(5)~(6)についてはクロモグリク酸ナトリウム(DSCG)1.0wt%水溶液中に浸漬させた後、121℃、30分間高圧蒸気滅菌を行うことによって、実施例(1)~(8)の定型デバイスを得た。
MOEBACの代わりに表1に示す割合でメタクリルアミドプロピルトリメチルアンモニウムクロライド(MAPTAC)を用いたことを除いては、実施例(1)~(8)と同様にして水和膨潤したハイドロゲルを得た。得られたハイドロゲルを、比較例(1)~(4)、(7)についてはDSP 0.2wt%水溶液に、比較例(5)~(6)についてはDSCG 1.0wt%水溶液中に浸漬させた後、121℃、30分間高圧蒸気滅菌を行うことによって、比較例(1)~(7)の定型デバイスを得た。なお、比較例(8)については定型のデバイスを構成することができなかった。
(1)含水率の測定
アニオン性薬物取込後の実施例(1)~(8)及び比較例(1)~(7)の定型デバイスを薬液から取出し、余分な水分を拭き取った後、含水状態のデバイスの質量(W1)を測定した。その後、60℃の乾燥機にて24時間乾燥させた後のデバイスの重量(W2)を測定し、各々の重量から下式に従い、含水率を算出した。
含水率(重量%)=[(W1-W2)/W1]×100
アニオン性薬物取込後の実施例(1)~(8)及び比較例(1)~(7)の定型デバイスを生理食塩水中に浸漬し、室温にて72時間静置し、内包したアニオン性薬物を生理食塩水中へ徐放させた。徐放後の生理食塩水中のアニオン性薬物を常法に従って高速液体クロマトグラフィー(HPLC、日本分光(株)社製)を用いて定量し、得られた値から単位デバイスあたりのアニオン性薬物取込量(μg/g)とした。
「プラスチックの引っ張り試験法(JIS K 7113)」に基づき試験片を調整し、薬剤を取り込んだ膨潤後の実施例(1)~(8)及び比較例(1)~(7)の定型デバイスをサンプルとして強度を測定した。
○:1.5MPa以上
×:1.5MPa未満
薬物徐放後の実施例(1)~(8)及び比較例(1)~(7)の定型デバイスの形状を、ディメンジョンアナライザーを用いて目視で確認した。
○:真円、かつ、面上に凹凸がない。
×:真円でない、あるいは、面上に凹凸がある。
HEMA:2-ヒドロキシエチルメタクリレート
MOEBAC:メタクリルオキシエチルジメチルベンジルアンモニウムクロライド
MAPTAC:メタクリルアミドプロピルトリメチルアンモニウムクロライド
A-200:ポリエチレングリコールジアクリレート
AIBN:アゾビスイソブチロニトリル
DSP:デキサメタゾンリン酸エステルナトリウム
DSCG:クロモグリク酸ナトリウム
Claims (5)
- (1)アニオン性薬物;及び
(2)構成成分として、置換又は非置換のアラルキル基を有するアルキル4級アンモニウム化合物及び(メタ)アクリル酸の縮合物又はその塩を含むカチオン性モノマーと、これらと共重合可能なモノマーとを含む共重合体
を含む、アニオン性薬物含有医療用デバイス。 - 前記置換又は非置換のアラルキル基を有するアルキル4級アンモニウム化合物及び(メタ)アクリル酸の縮合物が、下記一般式(I)
(式中、
R1は水素原子又はCH3を表わし;
R2~R4は、そのうち1~3個がそれぞれ独立して下記一般式(II)
(式中、xは1~3の整数を表わし;及び、R5~R9はそれぞれ独立して水素原子又はC1~C6の直鎖状若しくは分岐鎖状の炭化水素基を表わす)
で表わされる官能基を表わし、かつ、そのうち残りの2~0個がC1~C3の直鎖状若しくは分岐鎖状の炭化水素基を表わし;及び、
nは1~4の整数を表わす)
で示される化合物である、請求項1に記載のアニオン性薬物含有医療用デバイス。 - 前記(2)の共重合体が、構成成分として親水性モノマーをさらに含み、かつ、前記アニオン性薬物含有医療用デバイスがハイドロゲルである、請求項1に記載のアニオン性薬物含有医療用デバイス。
- 前記カチオン性モノマーの配合量が、親水性モノマー1モルに対し、0.5~20モル%である、請求項1に記載のアニオン性薬物含有医療用デバイス。
- 前記アニオン性薬物が、デキサメタゾンリン酸エステルナトリウム又はクロモグリク酸ナトリウムである、請求項1に記載のアニオン性薬物含有医療用デバイス。
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CN201580019988.9A CN106413755B (zh) | 2014-04-17 | 2015-04-16 | 含有阴离子性药物的医疗用器械 |
US15/304,409 US10668157B2 (en) | 2014-04-17 | 2015-04-16 | Anionic drug-containing medical device |
EP15780612.6A EP3132804B1 (en) | 2014-04-17 | 2015-04-16 | Medical device including anionic drug |
JP2016513826A JP6510497B2 (ja) | 2014-04-17 | 2015-04-16 | アニオン性薬物含有医療用デバイス |
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JP2018140969A (ja) * | 2017-02-28 | 2018-09-13 | 国立大学法人北海道大学 | 後眼部疾患治療用環状デバイス |
JP2018178072A (ja) * | 2017-04-13 | 2018-11-15 | 株式会社日本触媒 | 生体適合性医療用材料 |
WO2020004362A1 (ja) | 2018-06-26 | 2020-01-02 | 株式会社シード | アニオン性薬剤含有眼用デバイス |
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US11981760B2 (en) | 2018-06-29 | 2024-05-14 | The Regents Of The University Of Colorado, A Body Corporate | Therapeutic hydrogels and contact lens for corneal melting |
US11263661B2 (en) * | 2018-12-26 | 2022-03-01 | Microsoft Technology Licensing, Llc | Optimal view correction for content |
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CA2945741A1 (en) | 2015-10-22 |
EP3132804B1 (en) | 2021-05-05 |
BR112016024102A2 (pt) | 2017-08-15 |
US20170043017A1 (en) | 2017-02-16 |
RU2016144681A (ru) | 2018-05-21 |
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