WO2004073713A1 - Pirfenidone gel preparation - Google Patents

Pirfenidone gel preparation Download PDF

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Publication number
WO2004073713A1
WO2004073713A1 PCT/JP2004/001968 JP2004001968W WO2004073713A1 WO 2004073713 A1 WO2004073713 A1 WO 2004073713A1 JP 2004001968 W JP2004001968 W JP 2004001968W WO 2004073713 A1 WO2004073713 A1 WO 2004073713A1
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Prior art keywords
gel
gel preparation
concentration
solvent component
active ingredient
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PCT/JP2004/001968
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French (fr)
Japanese (ja)
Inventor
Kaori Ikeda
Yuichi Takasu
Kazumasa Morimoto
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Shionogi & Co., Ltd.
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Publication of WO2004073713A1 publication Critical patent/WO2004073713A1/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K47/00Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
    • A61K47/30Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
    • A61K47/36Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
    • A61K47/38Cellulose; Derivatives thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/33Heterocyclic compounds
    • A61K31/395Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/435Heterocyclic 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
    • A61K31/44Non condensed pyridines; Hydrogenated derivatives thereof
    • A61K31/4412Non condensed pyridines; Hydrogenated derivatives thereof having oxo groups directly attached to the heterocyclic ring
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/0012Galenical forms characterised by the site of application
    • A61K9/0014Skin, i.e. galenical aspects of topical compositions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P17/00Drugs for dermatological disorders

Definitions

  • the present invention relates to gels for treating fibrotic diseases of the skin.
  • 5-Methyl-11-phenyl-1- (1H) -pyridone is a drug known as Pirfenidone, which has an antifibrotic action (Japanese Patent Laid-Open No. 2-215719).
  • the formulation of pirfenidone includes capsules, tablets, tablets, ointments and the like.
  • “Hydrophilic ointment containing 5 to 10% of pirfenidone” is mentioned, but no specific composition is described.
  • Anti-fiber means pulmonary fibrosis, arteriosclerosis, skin fibrosis 'I', and the repair or normalization of pathological fibrotic tissue in keloids.
  • JP-T-Hei 2002-526447 (W000 / 16775) describes gels, ointments and creams as external preparations for treating fibrotic diseases of the skin.
  • the gel described in JP-T-Hei 2002-526447 uses carboxybutyl polymer (CVP> as a gel-forming agent. This gel is contained in the ionic component of the preparation and the biological component at the administration site.
  • W094 / 26249 (Tokuhyo Hei 8-510251) describes capsules, tablets, creams, ointments and the like as preparations containing N-substituted 2- (1H) pyridone as an active ingredient.
  • JP-A-3-151339 discloses a nonionic water-soluble cellulose ether (such as partially hydrophobized hydroxypropylmethylcellulose (HM-HPMC)) treated with a modifying agent having an alkyl group having 6 to 26 carbon atoms. Gels containing are described. It is described as a stable gel that has less interaction with drugs and does not require a neutralizing base compared to carboxybutyl polymer (CVP). Not listed.
  • CVP carboxybutyl polymer
  • tetracycline hydrochloride, kanamycin and gentamicin sulfate are described as active ingredients
  • modified cellulose ether, ethanol, isopropanol, glycerin, polyethylene glycol 400, and propylene glycol are described as solvent components.
  • HM-H PMCs are less susceptible to changes in pH and less susceptible to salt formation with drugs than CVP.
  • water / "ethanol, water isopropanol, benzyl alcohol, and dimethyl sulfoxide are described as solvents with high solubility of HM-HPMC. Gel pill phenodon is not described.
  • the concentration of the active ingredient is 0 .; 15 to 15 W / W%, the concentration of partially hydrophobic hydroxypropylmethylcellulose is 0.5 to 5 W / W%, and the concentration of the solvent component is 5 to
  • the gel according to the above (1) which is 70 W / W%.
  • the shape retention and spreadability of the preparation are not affected by ions or pH, and A preparation excellent in transferability to the skin is obtained.
  • CVP carboxybutyl polymer
  • the range of the solvent content can be set broadly by appropriately selecting the type and amount of the nonionic gelling agent, the concentration range of pinialidone can be broadly adjusted.
  • the solvent composition can be selected in consideration of skin irritation and skin absorption as well as possible.
  • a gel in which the drug is dissolved in a solvent that is miscible with water at an arbitrary ratio without causing phase separation is formed stably, so that a preparation with excellent drug uniformity can be obtained.
  • Figure 1 is a graph showing the viscosity changes with respect to P H gels.
  • Figure 2 Graph showing the inhibition of granulation formation by the gel in the rat; BEST MODE FOR CARRYING OUT THE INVENTION
  • a gel means a preparation in which a drug solution comprising a solvent that is miscible with water at an arbitrary ratio is imparted with shape retention and spreadability by a gelling agent.
  • the gel of the present invention containing pirfenidone as an active ingredient treats fibrotic diseases of the skin, for example, keloids, hypertrophic scars, fibrotic lesion tissues, contact warts, contact dermatitis and postoperative burns Useful to do.
  • fibrotic diseases of the skin for example, keloids, hypertrophic scars, fibrotic lesion tissues, contact warts, contact dermatitis and postoperative burns Useful to do.
  • the ⁇ partially hydrophobized hydroxypropylmethyl cellulose '' contained in the gel of the present invention is an external gel base also referred to as modified HPMC, in which a hydroxy group in the molecule is substituted with an alkyl group having 6 to 26 carbon atoms.
  • modified HPMC external gel base also referred to as modified HPMC, in which a hydroxy group in the molecule is substituted with an alkyl group having 6 to 26 carbon atoms.
  • Non-ionic water-soluble cellulose ethers include hydroxypropyl methyl cellulose.
  • Hydroxypropyl methylcellulose is a cellulose hydride A compound in which a loxy group is substituted by a methyl group or a hydroxypropyl group, and is derived to a methoxy group or a hydroxypropoxyl group, respectively.
  • the substitution rate of the methyl group is 10% to 35%
  • the substitution rate of the hydroxypropoxyl group is 2% to 15%. More preferably, a compound having a methyl group substitution rate of 18% to 25% and a hydroxypropoxyl group substitution rate of 3% to 13%, and a methyl group substitution rate of 26% to 32%.
  • a compound having a hydroxypropoxyl group substitution rate of 5% to 9%, or a methyl group substitution rate of 26% to 32% and a hydroxypropoxyl group substitution rate of 6 ° / 0 to: L 3% compound For example, hydroxypropylmethylcellulose 2208, 2906, or 2910, the 13th Revised Japanese Pharmacopoeia.
  • the partially hydrophobized hydroxypropyl methylcellulose (modified HPMC) used in the present invention can be obtained. Is obtained.
  • a modified HPMC By changing the introduction ratio of the alkyl group having 6 to 26 carbon atoms to the substituted hydroxymethylcellulose, a modified HPMC can be obtained in which the range of the solvent amount can be variously changed. For example, by reducing the introduction rate in the modified HPMC such as 0.1 to 0.7%, the amount of solvent required in the gel can be reduced. On the other hand, by increasing the introduction rate as high as 2.6 to 2%, the solvent content can be set high, and a formulation in which pirfenidone is dissolved at a high concentration can be obtained. In addition, by setting the introduction rate to 0.9 to 2.2%, a drug product with characteristics intermediate between the two can be obtained.
  • Modified HPMC is readily prepared by the method described in Japanese Patent No. 2610052. Alternatively, it is commercially available from Daido Kasei under the trade name Sangelose.
  • the concentration of the partially hydrophobized hydroxypropylmethyl cellulose is preferably 0.5 to 5 W / W%, more preferably 1 to 2 W / W% based on the whole gel.
  • the solvent component that can be contained in the gel preparation of the present invention is also used for reducing the skin irritation and improving skin transferability used for dissolving pirfenidone.
  • the preferred solvent component in the present invention is propylene glycol, isopropanol, polyethylene glycol, N-methyl-1-pyrrolidone, benzyl alcohol or a mixture thereof.
  • Coal 400 polyethylene glycol with a weight average molecular weight of 380 to 420 is preferred.
  • Typical formulations and typical ratios (W / W% based on the whole formulation) of the present invention are as follows.
  • Deionized water 10 to 94.4 W / W In the process of dispersing the denatured HPMC in heated deionized water and then cooling, add the pyrphenidone dissolved in the solvent component and stir. Easy to do Is prepared.
  • the gel of the present invention can further contain an antioxidant, a preservative, and the like.
  • Example 1 The present invention is described in more detail by the following examples. However, the present invention is not limited to this.
  • Example 1
  • a gel was prepared in the same manner as in Example 1 with the composition shown in the following table (W / W ° / o), and filled in a 5 g tube.
  • Table 3
  • Example 2-3 Example 2-3, Example 2-4, Example 2-5, Example 2-6, Example 2-7, Example 2-8, Example 2-9, Example 2-10, Example The gels prepared in 2-11 and Example 2-12 were stored at 40 ° C for 3 months, and the content of pirfenidone was measured by HPLC (absolute calibration method).
  • Example 2 -6 103.10%
  • Example 2-8 106.90%
  • Example 2-1, Example 2-2, Example 2-3, Example 2-8, Example 2-11, and Example 2-12 were administered to the rat abdomen at 300 mg each, The amount of intradermal transfer after time was measured.
  • the administration was performed by attaching a glass cell to the abdomen of the rat, from which the hair had been removed using a razor, and placing the preparation in the cell to keep the administration area constant.
  • occlusion administration in which the top of the glass cell was covered with a rubbed lid, and open administration in which the lid was removed were performed.
  • Example 2-1 50.8 ⁇ 13.9 16.0 ⁇ 2.3
  • Table 5 shows that gels using denatured HPMC (Sangelose 90L) as a gelling agent have good intradermal distribution and can easily transfer pirueyudon into the skin. Is shown. It is also possible to increase the amount of intradermal distribution by changing the solvent composition as shown in Table 5, and it is possible to increase the amount of picliidone as in Examples 2-11 and 2-12. Sufficient intradermal distribution can be maintained.
  • a gel was prepared with the composition (W / W%) shown in the table below and filled in a 5 g tube.
  • a gel was prepared with the composition (W / W%) in the table below c
  • a gel was prepared with the composition (WM) shown in the table below.
  • Example 5-1 Gels of Example 5-1, Example 5-2, Example 5-3, Example 5-4, Control example 1-1, Control example 1-2, Control example 1-3, Control example 1-4 was measured with an E-type viscometer.
  • the gel was tested for its ability to inhibit granulation formation according to the method described in Jpn Pharmacology Journal 99, 241-246 (1992).
  • Example 3-1, Example 2-3 and Control A were applied once a day for 14 days.
  • all cases were euthanized with over anesthesia, the granulation tissue around the mini-pump was excised including the pump, the granulation was incised, the pump was removed, and the weight of the granulation tissue after 145 was measured.
  • the significant difference test with control A was performed by Dunnett's test. In addition, 5 animals were used for each group.
  • Control A had 25% w / w of propylene dalicol, polyethylene glycolone 4
  • a preparation having excellent drug stability and skin transfer properties can be obtained by selecting a solvent component suitable for pirfenidone. Also, by selecting the type of denatured HPMC, gels with various amounts of solvent are formed, the range of concentration of picliidone is widened, and the amount of solvent is reduced to obtain a formulation with less skin irritation.

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Abstract

A gel preparation containing denatured HPMC together with 5-methyl-1-phenyl-2-(1H)-pyridone or a pharmaceutically acceptable salt or ester thereof as the active ingredient. Thus, a gel preparation for treating fibrous skin diseases which is excellent in stable shape retention, spread properties and skin migration of a drug is provided.

Description

明 細 書 ピノレフェニドンのゲノレ剤 技術分野  Description Genolating agent for pinorefenidone Technical field
本努明は、 皮膚の線維性疾患を処置するためのゲル剤に関する。 背景技術  The present invention relates to gels for treating fibrotic diseases of the skin. Background art
5—メチル一 1一フエニル一 2— ( 1 H) —ピリドンは抗線維ィ匕作用を有する、 一般名ピルフエ二ドン (Pirfenidone) として知られている薬物である (特開平 2-215719) 。 ここには、 ピルフエ二ドンの製剤としてカプセル剤、 錠剤、 タリー ム剤、 軟膏剤等が記載されている。 軟膏剤として 「5— 1 0 %のピルフエ二ドン を含む親水性軟膏」 が挙げられているが、 具体的な組成は記載されていない。 抗 線維とは、 肺線維症、 動脈硬ィ匕症をはじめ、 皮膚の線維' I"生疾患、 例えばケロイド における病的線維化組織の修復や正常化を意味する。  5-Methyl-11-phenyl-1- (1H) -pyridone is a drug known as Pirfenidone, which has an antifibrotic action (Japanese Patent Laid-Open No. 2-215719). Here, the formulation of pirfenidone includes capsules, tablets, tablets, ointments and the like. As an ointment, “Hydrophilic ointment containing 5 to 10% of pirfenidone” is mentioned, but no specific composition is described. Anti-fiber means pulmonary fibrosis, arteriosclerosis, skin fibrosis 'I', and the repair or normalization of pathological fibrotic tissue in keloids.
米国特許第 5, 310, 562号には、 ピルフエ二ドンの局所適用の可能性が記載され、 ピルフエ二ドン製剤としてカプセル剤、 錠剤、 クリーム剤、 軟膏剤、 親水性軟膏 剤等が記載されている力 具体的な組成は記載されていない。 また、 特表平 2002-526447 (W000/16775) には、 皮膚の線維性疾患を処置するための外用剤と して、 ゲル剤、 軟膏剤やクリーム剤が記載されている。 特表平 2002 - 526447に記 載されているゲル剤は、 カルボキシビュルポリマー (C V P> をゲル形成剤とし ている。 このゲル剤は、 製剤中のイオン成分や投与部位の生体成分に含まれるィ オン成分の影響を受けてゲルの粘度が変化するため、 安定した製剤の保形性ゃ展 延性を得るには幾つかの添加剤の添加や製剤全体の p H調整が必要である。 また、 このゲル剤では、 C V Pが有効成分や添加剤と反応し、 製剤の着色や有効成分の 安定性の低下が懸念される。  U.S. Pat.No. 5,310,562 describes the possibility of topical application of pirfenidone, and describes capsules, tablets, creams, ointments, hydrophilic ointments, etc. as pirfenidone preparations. The specific composition is not described. JP-T-Hei 2002-526447 (W000 / 16775) describes gels, ointments and creams as external preparations for treating fibrotic diseases of the skin. The gel described in JP-T-Hei 2002-526447 uses carboxybutyl polymer (CVP> as a gel-forming agent. This gel is contained in the ionic component of the preparation and the biological component at the administration site. Since the viscosity of the gel changes due to the influence of the ON component, it is necessary to add some additives and adjust the pH of the whole preparation to obtain stable shape retention and spreadability of the preparation. In this gel, CVP reacts with the active ingredient and additives, and there is a concern that the coloring of the formulation and the stability of the active ingredient may be reduced.
W094/26249 (特表平 8-510251) には、 N—置換 2— ( 1 H) ピリドン等を有効 成分とする製剤として、 カプセル剤、 錠剤、 クリーム剤、 軟膏剤等が挙げられて いる。 軟膏剤として 「5— 1 0 %のピルフエユドンを含む親水性軟膏」 の記載が ある力 具体的な組成については記載されていない。 W094 / 26249 (Tokuhyo Hei 8-510251) describes capsules, tablets, creams, ointments and the like as preparations containing N-substituted 2- (1H) pyridone as an active ingredient. The description of the ointment "Hydrophilic ointment containing 5- 10% pyreuyudon" A certain composition is not described.
特開平 3-151339には、 炭素原子数 6〜 2 6のアルキル基を有する変性剤で処理 した非イオン性水溶性セルロースエーテル (部分疎水化ヒドロキシプロピルメチ ルセルロース (HM—H PMC) 等) を含有するゲル剤が記載されている。 これ は、 カルボキシビュルポリマー (C V P) に比較して、 薬物との相互作用が少な く、 中和用の塩基を必要としない安定なゲル剤として記載されているが、 ピルフ ェユドンのゲル剤については記載されていない。 ここでは、 有効成分として、 塩 酸テトラサイクリン、 カナマイシン、 硫酸ゲンタマイシンが、 溶媒成分として、 変性セルロースエーテル、 エタノール、 イソプロパノール、 グリセリン、 ポリエ チレングリコール 4 0 0、 プロピレングリコールが記載されている。  JP-A-3-151339 discloses a nonionic water-soluble cellulose ether (such as partially hydrophobized hydroxypropylmethylcellulose (HM-HPMC)) treated with a modifying agent having an alkyl group having 6 to 26 carbon atoms. Gels containing are described. It is described as a stable gel that has less interaction with drugs and does not require a neutralizing base compared to carboxybutyl polymer (CVP). Not listed. Here, tetracycline hydrochloride, kanamycin and gentamicin sulfate are described as active ingredients, and modified cellulose ether, ethanol, isopropanol, glycerin, polyethylene glycol 400, and propylene glycol are described as solvent components.
薬剤学、 52卷、 4号、 272-279、 1992には、 HM—H PMCが C V Pに比べ、 粘 度が p Hの変化に影響を受けにくく、 薬物との塩形成を起こしにくいこと、 なら びに HM— H PMCの溶解性が高い溶媒として、 水/"エタノール、 水 イソプロ パノール、 ベンジルアルコール、 ジメチルスルホキシドが記載されている。 ピル フエノドンのゲル剤については記載されていない。  Pharmacology, Vol. 52, No. 4, 272-279, 1992 states that HM-H PMCs are less susceptible to changes in pH and less susceptible to salt formation with drugs than CVP. In addition, water / "ethanol, water isopropanol, benzyl alcohol, and dimethyl sulfoxide are described as solvents with high solubility of HM-HPMC. Gel pill phenodon is not described.
薬剤学、 52卷、 4号、 280-287、 1992には、 HM— H PMCを用いたゲル剤は C V Pを用いたゲル剤に比べ、 性状や薬物の安定性、 薬物放出性および薬物経皮吸 収性に大きな違いはなかったが、 薬物によっては結晶析出のを防止、 薬物を安定 化させる可能性の特徴が記載されている。 有効成分として、 硫酸ゲンタマイシン、 酢酸デキサメタゾン、 インドメタシンが記載されているが、 ピルフエノドンのゲ ル剤については記載されていない。 溶媒成分として、 エタノール、 イソプロパノ 一ノレ、 べンジノレァノレコーノレ、 ポリエチレングリコーノレ、 ポリエチレングリコーノレ 4 0 0、 ポリエチレングリコールモノォレイン酸エステル、 グリセリンが記載さ れており、 単一または混合して用いる。 発明の開示  Pharmaceutical Sciences, Vol. 52, No. 4, 280-287, 1992 states that gels using HM-H PMC are more effective than gels using CVP in terms of properties, drug stability, drug release, and transdermal drug delivery. Although there was no significant difference in absorbency, it describes the features of preventing the precipitation of crystals and stabilizing the drug for some drugs. Gentamycin sulfate, dexamethasone acetate, and indomethacin are described as active ingredients, but no mention is made of gels of pirfenodon. As the solvent component, ethanol, isopropanol, polyethylene glycol, polyethylene glycol 400, polyethylene glycol monooleate, and glycerin are described. Used. Disclosure of the invention
そこで、 安定した保形性ゃ展延性を持つ薬物の皮膚移行性に優れたゲノレ剤を得 るため、 添加剤の工夫ではなく、 ゲル形成剤と溶媒成分に着目し、 鋭意検討を行 つた。 その結果、 非イオン性のゲル形成剤の種類と添 量おょぴピルフエユドン の溶解性に優れ溶液状態で安定な溶媒組成を適宜選択し、 目的のゲル剤を簡便に 調製できることを見出した。 Therefore, in order to obtain a genole agent that is stable and has excellent shape transferability and excellent skin transferability of a drug, we focused on the gel-forming agent and the solvent component instead of devising additives, and conducted intensive studies. As a result, the type and amount of non-ionic gel-forming agent It has been found that the desired gel agent can be easily prepared by appropriately selecting a solvent composition which is excellent in solubility and stable in a solution state.
すなわち本発明は、  That is, the present invention
( 1 ) 部分疎水化ヒドロキシプロピルメチルセルロースとともに、 有効成分とし て 5—メチルー 1—フエ二ルー 2— (1H) —ピリ ドンまたはその製薬的に許容 される塩を含有するゲル剤、  (1) A gel preparation containing 5-methyl-1-phenyl-2- (1H) -pyridone or a pharmaceutically acceptable salt thereof as an active ingredient together with partially hydrophobized hydroxypropylmethylcellulose,
(2) 溶媒成分をさらに含有する、 上記 (1) 1記載のゲル剤、  (2) The gel according to (1), further comprising a solvent component,
(3) 溶媒成分がプロピレングリコール、 イソプロパノール、 ポリエチレングリ コール、 N—メチルー 2—ピロリドン、 ベンジルアルコールまたはそれらの混液 である、 上記 (2) 記載のゲル剤、  (3) The gel according to the above (2), wherein the solvent component is propylene glycol, isopropanol, polyethylene glycol, N-methyl-2-pyrrolidone, benzyl alcohol or a mixture thereof.
( 4 ) 溶媒成分が重量平均分子量 380〜 420のポリエチレングリコールであ る、 上記 (3) 記載のゲル剤、  (4) The gel according to (3), wherein the solvent component is polyethylene glycol having a weight average molecular weight of 380 to 420.
(5) 溶媒成分の濃度がゲル剤全体に対して 5〜70W/ である上記 (2) 力 >ら (4) までのいずれ力記載のゲル剤、 (5) The gel according to any one of (2) above, wherein the concentration of the solvent component is 5 to 70 W /
(6) 有効成分の濃度がゲル剤全体に対して 0.:!〜 15W/ /。である、 請求項 (1) から (5) までのいずれ力、記載のゲル剤、  (6) The concentration of the active ingredient is 0:! ~ 15W // based on the whole gel. The gel according to any one of claims (1) to (5),
( 7 ) 部分疎水化ヒドロキシプロピルメチルセルロースの濃度がゲル剤全体に対 して 0.5〜5W/W%である、 上記 (1) から (6) までのいずれカ記載のゲル剤、 (7) The gel according to any one of the above (1) to (6), wherein the concentration of the partially hydrophobized hydroxypropylmethylcellulose is 0.5 to 5 W / W% based on the entire gel.
(8) ゲル剤全体に対して有効成分の濃度が 0.;!〜 15W/W%、 部分疎水化ヒドロキ シプロピルメチルセルロースの濃度が 0.5〜5W/W%、 溶媒成分の濃度が 5〜(8) The concentration of the active ingredient is 0 .; 15 to 15 W / W%, the concentration of partially hydrophobic hydroxypropylmethylcellulose is 0.5 to 5 W / W%, and the concentration of the solvent component is 5 to
70W/W%である、 上記 (1) 記載のゲル剤、 に関する。 The gel according to the above (1), which is 70 W / W%.
本発明によれば、 皮膚刺激性や薬物の安定性および皮膚への移行性に優れた溶 媒を選択することで、 製剤の保形性ゃ展延性がイオンや pHの影響を受けず、 皮 膚への移行性に優れた製剤が得られる。  According to the present invention, by selecting a solvent having excellent skin irritation, drug stability and transferability to the skin, the shape retention and spreadability of the preparation are not affected by ions or pH, and A preparation excellent in transferability to the skin is obtained.
また、 カルボキシビュルポリマー (CVP) のゲル剤に比べ、 ピルフエユドンや 他の添加物と相互作用を起こす可能性が低く、 安定性に優れる。 さらに、 投与部 位の生体成分 (イオン等) の影響も受けない。  Also, compared to carboxybutyl polymer (CVP) gels, it is less likely to interact with pirfueudon and other additives, and has excellent stability. Furthermore, it is not affected by biological components (such as ions) at the administration site.
さらに、 本発明では、 非イオン性ゲル化剤の種類と添加量を適宜選択すること で溶媒含量の範囲を広く設定できるため、 ピルフエ二ドンの濃度範囲を広く調整 出来るとともに、 皮膚刺激性や皮膚吸収性を考慮した溶剤組成を選択できる。 また、 相分離を起こさず水と任意の比率で混和する溶媒に薬物が溶解したゲル が安定に形成されるため、 薬物均一性に優れた製剤が得られる。 図面の簡単な説明 Furthermore, in the present invention, since the range of the solvent content can be set broadly by appropriately selecting the type and amount of the nonionic gelling agent, the concentration range of pirufenidone can be broadly adjusted. The solvent composition can be selected in consideration of skin irritation and skin absorption as well as possible. In addition, a gel in which the drug is dissolved in a solvent that is miscible with water at an arbitrary ratio without causing phase separation is formed stably, so that a preparation with excellent drug uniformity can be obtained. BRIEF DESCRIPTION OF THE FIGURES
図 1 : ゲル剤の PHに対する粘度推移を示すグラフである。 Figure 1: is a graph showing the viscosity changes with respect to P H gels.
図 2 : ラット;力ラゲニン肉芽モデルにおけるゲル剤の肉芽形成抑制を示す グラフである。 発明を実施するための最良の形態  Figure 2: Graph showing the inhibition of granulation formation by the gel in the rat; BEST MODE FOR CARRYING OUT THE INVENTION
本発明において、 ゲル剤とは、 水と任意の比率で混和する溶媒からなる薬物溶 液がゲル化剤により保形性と展延性を付与された製剤を意味する。  In the present invention, a gel means a preparation in which a drug solution comprising a solvent that is miscible with water at an arbitrary ratio is imparted with shape retention and spreadability by a gelling agent.
ピルフエ二ドンを有効成分として含有する本発明のゲル剤は、 皮膚の線維性疾 患、 例えばケロイド、 肥厚性瘢痕、 線維化病変組織、 接触性疣贅、 接触性皮膚炎 および術後熱傷を処置するのに有用である。  The gel of the present invention containing pirfenidone as an active ingredient treats fibrotic diseases of the skin, for example, keloids, hypertrophic scars, fibrotic lesion tissues, contact warts, contact dermatitis and postoperative burns Useful to do.
本発明のゲル剤に含まれる有効成分としての 「 5—メチルー 1一フエ二ルー 2 一 ( 1 H) —ピリ ドン (ピノレフエ二ドン) 」 は、 特開昭 4 9 - 8 7 6 7 7に記載 の方法によって調製される。 ピルフエ-ドンの塩としては、 アミノ酸との塩、 無 機酸 (塩酸、 臭化水素酸、 リン酸、 硫酸等) 、 および有機酸 (酢酸、 クェン酸、. マレイン酸、 フマル酸、 ベンゼンスルホン酸、 p—トルエンスルホン酸等) との 塩が挙げられる。 有効成分の濃度は 0. 1〜1 5 WZW%が好ましく、 さらに好 ましくは 0. 1〜5 W/W%である。  "5-Methyl-1-phenyl-2- (1H) -pyridone (pinolephenidone)" as an active ingredient contained in the gel preparation of the present invention is disclosed in Japanese Patent Application Laid-Open No. 49-876777. Prepared by the method described. Examples of the salt of pyrfuedone include salts with amino acids, inorganic acids (hydrochloric acid, hydrobromic acid, phosphoric acid, sulfuric acid, etc.), and organic acids (acetic acid, cunic acid, maleic acid, fumaric acid, benzenesulfonic acid) , P-toluenesulfonic acid and the like). The concentration of the active ingredient is preferably from 0.1 to 15 WZW%, more preferably from 0.1 to 5 W / W%.
本発明のゲル剤に含まれる 「部分疎水化ヒドロキシプロピルメチルセルロー ス」 は変性 H PMCとも称される外用ゲル基剤であり、 分子中のヒドロキシ基を 炭素原子数 6 ~ 2 6のアルキル基を有するハライド、 モノエポキシドまたはモノ ィソシァネートで置換した非架橋の非イオン性水溶性セルロースエーテルを意味 する。 詳細は B本国特許第 2610052号に記載されている。  The `` partially hydrophobized hydroxypropylmethyl cellulose '' contained in the gel of the present invention is an external gel base also referred to as modified HPMC, in which a hydroxy group in the molecule is substituted with an alkyl group having 6 to 26 carbon atoms. Means a non-crosslinked nonionic water-soluble cellulose ether substituted with a halide, monoepoxide or monoisocyanate. The details are described in B Patent No. 2610052.
非イオン性水溶性セルロースエーテルとしてはヒドロキシプロピルメチルセル ロースが挙げられる。 ヒドロキシプロピルメチルセルロースはセルロースのヒド ロキシ基がメチル基またはヒドロキシプロキル基により置換され、 それぞれメト キシ基、 ヒドロキシプロボキシル基に誘導された化合物である。 好ましくは、 メ チル基の置換率が 1 0 %から 3 5 %であり、 ヒドロキシプロポキシル基の置換率 が 2 〜 1 5 %である。 さらに好ましくはメチル基の置換率が 1 8 %から 2 5 % でありヒドロキシプロポキシル基の置換率が 3 %〜 1 3 %である化合物、 メチル 基の置換率が 2 6 %から 3 2 %でありヒドロキシプロポキシル基の置換率が 5 % 〜9 %である化合物、 またはメチル基の置換率が 2 6 %から 3 2 %でありヒドロ キシプロボキシル基の置換率が 6 °/0〜: L 3 %である化合物である。 例えば、 第 13 改正日本薬局方ヒドロキシプロピルメチルセルロース 2 2 0 8、 2 9 0 6、 また は 2 9 1 0が挙げられる。 Non-ionic water-soluble cellulose ethers include hydroxypropyl methyl cellulose. Hydroxypropyl methylcellulose is a cellulose hydride A compound in which a loxy group is substituted by a methyl group or a hydroxypropyl group, and is derived to a methoxy group or a hydroxypropoxyl group, respectively. Preferably, the substitution rate of the methyl group is 10% to 35%, and the substitution rate of the hydroxypropoxyl group is 2% to 15%. More preferably, a compound having a methyl group substitution rate of 18% to 25% and a hydroxypropoxyl group substitution rate of 3% to 13%, and a methyl group substitution rate of 26% to 32%. A compound having a hydroxypropoxyl group substitution rate of 5% to 9%, or a methyl group substitution rate of 26% to 32% and a hydroxypropoxyl group substitution rate of 6 ° / 0 to: L 3% compound. For example, hydroxypropylmethylcellulose 2208, 2906, or 2910, the 13th Revised Japanese Pharmacopoeia.
このような置換されたヒドロキシメチルセルロースに対し、 さらに残りのヒド 口キシ基に炭素数 6〜26のアルキル基を導入することで、 本宪明に使用する部分 疎水化ヒドロキシプロピルメチルセルロース (変性 H PMC) が得られる。  By introducing an alkyl group having 6 to 26 carbon atoms into the remaining hydroxy group to such a substituted hydroxymethyl cellulose, the partially hydrophobized hydroxypropyl methylcellulose (modified HPMC) used in the present invention can be obtained. Is obtained.
置換されたヒドロキシメチルセルロースに対する炭素数 6〜26のアルキル基の 導入率を変える事で、 溶媒量の範囲を様々に変えることのできる変性 H PMCが 得られる。 例えば、 変性 H PMCにおける導入率を 0. 1〜0. 7 %のように低くす ることで、 ゲル剤中に必要な溶媒量を軽減させることができる。 一方、 導入率を 2. 6〜 2 %のように高くすることで、 溶媒含量が高く設定可能となり、 高濃度 にピルフエ二ドンを溶解させた製剤が得られる。 また、 導入率を 0. 9〜2. 2% にすることで、 両者の中間の特徴を持つ製剤が得られる。  By changing the introduction ratio of the alkyl group having 6 to 26 carbon atoms to the substituted hydroxymethylcellulose, a modified HPMC can be obtained in which the range of the solvent amount can be variously changed. For example, by reducing the introduction rate in the modified HPMC such as 0.1 to 0.7%, the amount of solvent required in the gel can be reduced. On the other hand, by increasing the introduction rate as high as 2.6 to 2%, the solvent content can be set high, and a formulation in which pirfenidone is dissolved at a high concentration can be obtained. In addition, by setting the introduction rate to 0.9 to 2.2%, a drug product with characteristics intermediate between the two can be obtained.
変性 H P M Cは日本国特許第 2610052号に記載されて 、る方法によつて容易に 調製される。 あるいは、 大同化成からサンジェロースの商品名で市販されている。 部分疎水化ヒドロキシプロピルメチルセル口ースの濃度はゲル剤全体に対して 0. 5〜5W/W%が好ましく、 さらに好ましくは 1〜2W/W%である。  Modified HPMC is readily prepared by the method described in Japanese Patent No. 2610052. Alternatively, it is commercially available from Daido Kasei under the trade name Sangelose. The concentration of the partially hydrophobized hydroxypropylmethyl cellulose is preferably 0.5 to 5 W / W%, more preferably 1 to 2 W / W% based on the whole gel.
本発明のゲル剤が含有し得る溶媒成分は、 ピルフエ二ドンの溶解に用いられる ほ力 \ 皮膚刺激性の軽減や皮膚移行性の向上のためにも用いられる。  The solvent component that can be contained in the gel preparation of the present invention is also used for reducing the skin irritation and improving skin transferability used for dissolving pirfenidone.
本発明において好ましい溶媒成分はプロピレングリコ^"ル、 ィソプロパノール、 ポリェチレングリコール、 N—メチル一 2—ピロリドン、 ベンジルアルコールま たはそれらの混液である。 ポリエチレングリコールとしては、 ポリエチレングリ コール 400 (重量平均分子量 380〜 420のポリェチレングリコール) が好 ましい。 The preferred solvent component in the present invention is propylene glycol, isopropanol, polyethylene glycol, N-methyl-1-pyrrolidone, benzyl alcohol or a mixture thereof. Coal 400 (polyethylene glycol with a weight average molecular weight of 380 to 420) is preferred.
混液の場合の好ましい組合せとその好ましい濃度は、 1 ) ィソプロパノール 5 〜15W/W0/0 +プロピレングリコールが 5〜15WZW0/0、 2) イソプロパノ ール 5〜 15WZW%+ベンジルアルコール 1〜5W/W%、 3) イソプロパノ ール 5〜15WZW% + N—メチル一 2—ピリ ドン 1〜5WZW%、 4) プロピ レングリコールが 5〜15W /W% +ポリエチレングリコール 400力 S5〜l 0 W/W%, 5) プロピレングリコール 5〜 15 / %+ベンジルアルコール 1 〜5W/W%、 6) プロピレングリコール 5〜15WZW% + N—メチル一 2— ピリ ドン 1〜5WZW%、 7) イソプロパノール 5〜15W/W% +プロピレン グリコールが 5〜15WZW% +ポリエチレングリコール 400が 5〜10WZ W%、 8) イソプロパノールが 5〜 15 W/W% +プロピレングリコールが 5〜 15 W/W%+ベンジルアルコールが 1〜 5 W/W%, 9 ) ィソプロパノールが 5〜15W/W%+プロピレングリコールが 5〜15WZW%+N—メチル一 2 —ピリ ドンが 1〜5W/W%、 10) イソプロパノール 5〜15WZWQ/0+プロ ピレングリコールが 5〜 15 WZW0/o +ポリエチレングリコール 400が 5〜 1 0 W/Wo/0+ベンジルアルコール 1〜 5 W/W%, 11) イソプロパノール 5〜 15W/W% +プロピレングリコールが 5〜15WZW% +ポリエチレングリコ ール 400が 5〜 10 WZW0/o + N—メチルー 2—ピリ ドンが 1〜 5 W/W%で ある。 Preferred combinations with preferred concentration in the case of mixture, the 1) I isopropanol 5 ~15W / W 0/0 + propylene glycol 5~15WZW 0/0, 2) isopropanol Lumpur 5~ 15WZW% + benzyl alcohol 1 5W / W%, 3) Isopropanol 5 to 15WZW% + N-methyl-2-pyridone 1 to 5WZW%, 4) Propylene glycol 5 to 15W / W% + Polyethylene glycol 400 power S5 to 10W / W%, 5) Propylene glycol 5-15 /% + benzyl alcohol 1-5W / W%, 6) Propylene glycol 5-15WZW% + N-methyl-1-pyridone 1-5WZW%, 7) Isopropanol 5- 15W / W% + 5 to 15WZW% for propylene glycol + 5 to 10WZ W% for polyethylene glycol 400, 8) 5 to 15W / W% for isopropanol + 5 to 15W / W% for propylene glycol + 1 for benzyl alcohol ~ 5 W / W%, 9) Isopropanol 5-15 W / W% + propylene glycol 5-15 WZW% + N-methyl-2-pyridone 1-5W / W%, 10) Isopropanol 5-15WZWQ / 0 + propylene glycol 5-15 WZW 0 / o + polyethylene glycol 400 5-10W / W W o / 0 + benzyl alcohol 1 to 5 W / W%, 11) isopropanol 5 to 15 W / W% + propylene glycol 5 to 15 WZW% + polyethylene glycol 400 5 to 10 WZW 0 / o + N-methyl 2-Pyridone is 1 to 5 W / W%.
本願発明の典型的な処方および典型的な比率 (製剤全体に対する W/W%) は以下 の通りである。  Typical formulations and typical ratios (W / W% based on the whole formulation) of the present invention are as follows.
表 1 table 1
ピルフエュドン 0.1〜15 W/W°/o Pilfudon 0.1 ~ 15 W / W ° / o
溶媒成分 5〜70 W/W°/o Solvent component 5-70 W / W ° / o
変性 HPMC 0.5〜5 W/W% Denatured HPMC 0.5-5 W / W%
脱イオン水 10〜94.4 W/W 本発明のゲル剤は、 加温した脱ィオン水に変性 H PMCを分散させた後冷却さ せる過程で、 溶媒成分に溶解させたピルフエ二ドンを添加し攪拌することで容易 に調製される。 Deionized water 10 to 94.4 W / W In the process of dispersing the denatured HPMC in heated deionized water and then cooling, add the pyrphenidone dissolved in the solvent component and stir. Easy to do Is prepared.
本発明のゲル剤は、 抗酸化剤や防腐剤等をさらに含有することができる。 実施例  The gel of the present invention can further contain an antioxidant, a preservative, and the like. Example
本発明を以下の実施例によりさらに詳しく説明する。 ただし、 本発明はこれに 限定されるものではない。 実施例 1  The present invention is described in more detail by the following examples. However, the present invention is not limited to this. Example 1
ゲノレ斉 Uの調製  Preparation of Genorai U
ビーカーに適量の脱イオン水を入れ、 80°Cに加温して、 変性 HPMCであるサンジ ェロースの各グレードの:!〜 1. 5gを均一に分散させた後、 ビーカーを氷水浴中に 移して冷却した。 別途、 l〜15gのピルフエ二ドンを 5〜70gの溶媒に溶解させ、 冷 却途中のビーカーに添加し、 最後に適量の脱イオン水を加えて総量を 100gとし、 攪拌機で均一に混和して全成分を溶解させてゲル剤を調製した。 表 2に各製剤の 成分組成を示す。 表 2  Add an appropriate amount of deionized water to a beaker, heat to 80 ° C, and disperse uniformly:! ~ 1.5 g of each grade of denatured HPMC Sangelose, then transfer the beaker to an ice-water bath. And cooled. Separately, dissolve l to 15 g of pirfenidone in 5 to 70 g of solvent, add to the beaker in the middle of cooling, and finally add an appropriate amount of deionized water to make the total amount 100 g, and mix uniformly with a stirrer. A gel was prepared by dissolving all components. Table 2 shows the composition of each formulation. Table 2
Figure imgf000008_0001
実施例 2
Figure imgf000008_0001
Example 2
実施例 1と同様に下表の組成 (W/W°/o)でゲル剤を調製し、 5gチューブに充てんし た。 表 3 A gel was prepared in the same manner as in Example 1 with the composition shown in the following table (W / W ° / o), and filled in a 5 g tube. Table 3
Figure imgf000009_0001
試験例 1
Figure imgf000009_0001
Test example 1
実施例 2- 3、 実施例 2- 4、 実施例 2- 5、 実施例 2- 6、 実施例 2- 7、 実施例 2- 8、 実施 例 2- 9、 実施例 2- 10、 実施例 2- 11、 実施例 2- 12で調製たゲル剤を 40°C3箇月間保存 し、 ピルフェ二ドン含量を HPLC法 (絶対検量法)で測定した。  Example 2-3, Example 2-4, Example 2-5, Example 2-6, Example 2-7, Example 2-8, Example 2-9, Example 2-10, Example The gels prepared in 2-11 and Example 2-12 were stored at 40 ° C for 3 months, and the content of pirfenidone was measured by HPLC (absolute calibration method).
得られた結果を表 4に示す。  Table 4 shows the obtained results.
表 4 Table 4
製剤 40°C3箇月間  Formulation 40 ° C for 3 months
実施例 2-3 99.5%  Example 2-3 99.5%
実施例 2-4 100.9%  Example 2-4 100.9%
実施例 2-5 103.80%  Example 2-5 103.80%
実施例 2=-6 103.10%  Example 2 = -6 103.10%
実施例 2-7 1 10.40%  Example 2-7 1 10.40%
実施例 2-8 106.90%  Example 2-8 106.90%
実施例 2-9 104.20%  Example 2-9 104.20%
実施例 2-10 105.50%  Example 2-10 105.50%
実施例 2-" 105.40%  Example 2- "105.40%
実施例 2-12 103.70% 表 4に示した結果は、 ゲル化剤として変性 HPMC (サンジェロース 90L) を用い たゲル剤が良好な安定性を有することを示している。 なおいずれの実施例におい ても、 経時保存後に結晶の析出は認められなかった。 試験例 2 Example 2-12 103.70% The results shown in Table 4 were obtained by using denatured HPMC (San Jellose 90L) as the gelling agent. This shows that the gel has good stability. Note that no precipitation of crystals was observed after storage over time in any of the examples. Test example 2
実施例 2-1、 実施例 2- 2、 実施例 2- 3、 実施例 2- 8、 実施例 2- 11、 実施例 2- 12のゲ ル剤を、 ラット腹部にそれぞれ 300mg投与し、 6時間後の皮内移行量を測定した。 投与は、 剃刀で体毛を除いたラット腹部にガラスセルを接着し、 セル内に製剤を 入れて投与面積を一定にして行った。 投与方法として、 ガラスセル上部をすり合 わせの蓋で覆う閉塞投与と、 蓋を除いた開放系投与を行った。  The gels of Example 2-1, Example 2-2, Example 2-3, Example 2-8, Example 2-11, and Example 2-12 were administered to the rat abdomen at 300 mg each, The amount of intradermal transfer after time was measured. The administration was performed by attaching a glass cell to the abdomen of the rat, from which the hair had been removed using a razor, and placing the preparation in the cell to keep the administration area constant. As the administration method, occlusion administration in which the top of the glass cell was covered with a rubbed lid, and open administration in which the lid was removed were performed.
投与部位に残存する製剤をエタノールで除去した。 次いで、 投与部位の皮膚を 回収し、 細断後、 酢酸ェチルで皮膚内のピルフエ二ドンを抽出して HPLCで定量し 得られた結果を表 5に示す。  The formulation remaining at the administration site was removed with ethanol. Next, the skin at the administration site was collected and, after shredding, pirfenidone in the skin was extracted with ethyl acetate and quantified by HPLC, and the results obtained are shown in Table 5.
表 5 Table 5
皮内分布 ( g)  Intradermal distribution (g)
製剤 ピルフエ二ドン W/W%  Formulation Pirfenidone W / W%
閉塞投与 開放系  Occlusion administration Open system
実施例 2-1 50.8±13.9 16.0±2.3  Example 2-1 50.8 ± 13.9 16.0 ± 2.3
実施例 2-2 28.8±7.7  Example 2-2 28.8 ± 7.7
実施例 2-3 58.5±25.7  Example 2-3 58.5 ± 25.7
実施例 2-8 1 19.2±38.2  Example 2-8 1 19.2 ± 38.2
実施例 2 - 11 53.83± 13.85  Example 2-11 53.83 ± 13.85
実施例 2-12
Figure imgf000010_0001
64.9±31.1 表 5は、 ゲル化剤として変性 HPMC (サンジェロース 90L) を用いたゲル剤は、 良好な皮内分布量を有し、 容易にピルフエユドンを皮内に移行させることが出来 ることを示している。 また、 表 5のように溶剤組成を変えることによって皮内分 布量を増大させることも可能であり、 実施例 2- 11、 実施例 2- 12のようにピルフエ 二ドン量を低減した製剤でも十分な皮内分布量が維持できる。 実施例 3
Example 2-12
Figure imgf000010_0001
64.9 ± 31.1 Table 5 shows that gels using denatured HPMC (Sangelose 90L) as a gelling agent have good intradermal distribution and can easily transfer pirueyudon into the skin. Is shown. It is also possible to increase the amount of intradermal distribution by changing the solvent composition as shown in Table 5, and it is possible to increase the amount of pirufenidone as in Examples 2-11 and 2-12. Sufficient intradermal distribution can be maintained. Example 3
下表の組成 (W/W%)でゲル剤を調製し、 5gチューブに充てんした。  A gel was prepared with the composition (W / W%) shown in the table below and filled in a 5 g tube.
表 6 [w/w%] Table 6 [w / w%]
Figure imgf000011_0001
実施例 4
Figure imgf000011_0001
Example 4
下表の組成 (W/W)でゲル剤の調製を試みた。 表 7  Preparation of a gel was attempted with the composition (W / W) shown in the table below. Table 7
Figure imgf000011_0002
Figure imgf000011_0002
〇:均一なゲル剤調製可  〇: Uniform gel preparation is possible
X:結晶析出 ,ゲル剤調製不可 カルボキシビ二ルポリマ (CVP)を用いた組成 (対照例 4-1、 対照例 4- 2、 対照例 4-3、 対照例 4- 4)の場合には、 白濁あるいは薬物の結晶が析出し、 均一なゲル剤 の調製が不可能であった。 しかし、 これらの組成においてもゲル形成剤を変性 HPMC (サンジェロース 90L) に変えることにより均一なゲル剤を調製することが できた (実施例 4-1、 実施例 4-1、 実施例 4-3、 実施例 4 - 4)。 実施例 5 X: Crystal precipitation, gel preparation not possible In the case of the composition using carboxyvinyl polymer (CVP) (Control Example 4-1, Control Example 4-2, Control Example 4-3, Control Example 4-4), cloudiness or drug crystals precipitated, It was not possible to prepare a uniform gel. However, even with these compositions, uniform gels could be prepared by changing the gel-forming agent to denatured HPMC (Sangelose 90L) (Examples 4-1, 4-1 and 4- 3, Example 4-4). Example 5
下表の組成 (W/W%)でゲル剤を調製した c A gel was prepared with the composition (W / W%) in the table below c
表 8 Table 8
[W/W%] [W / W%]
Figure imgf000012_0001
対照例 1
Figure imgf000012_0001
Control 1
下表の組成 (WM)でゲル剤を調製した。 A gel was prepared with the composition (WM) shown in the table below.
表 9 Table 9
Figure imgf000013_0001
試験例 3
Figure imgf000013_0001
Test example 3
実施例 5-1、 実施例 5- 2、 実施例 5-3、 実施例 5-4、 対照例 1-1、 対照例 1-2、 対照 例 1-3、 対照例 1-4のゲル剤の粘度を E型粘度計にて測定した。  Gels of Example 5-1, Example 5-2, Example 5-3, Example 5-4, Control example 1-1, Control example 1-2, Control example 1-3, Control example 1-4 Was measured with an E-type viscometer.
結果を表 1 0に示し、 それをグラフ化して図 1に示す。  The results are shown in Table 10, which is graphed in FIG.
表 1 0 Table 10
PH CVP 変性 HPMC  PH CVP denatured HPMC
2. 3 28365  2. 3 28365
3. 8 32768  3. 8 32768
4. 1 11468. 8  4. 1 11468. 8
5. 3 76288  5. 3 76288
5. 9 33280  5. 9 33 280
9. 2 76390. 4  9.2 76390. 4
10. 2 31232  10. 2 31232
10. 8 73728 図 1は、 ゲル化剤に変性 HPMCを用いたゲル剤は PH2. 3〜10. 2で安定した粘度を 維持したのに対し、 カルボキシビ二ルポリマー (CVP)を用いたゲル剤の粘度は酸 †生側で大きく低下していることを示している。 変性 HPMC (サンジェロース 90L) をゲル化剤に用いると pHに対して安定なゲル剤が調製出来る。 試験例 4 10.8 73728 1, gels with denaturing HPMC gelling agent relative to that maintain P H2. 3 to 10. Stable viscosity 2 was used Karubokishibi two Ruporima (CVP) Gel This indicates that the viscosity of the agent is greatly reduced on the acid generation side. When denatured HPMC (Sangelose 90L) is used as the gelling agent, a pH stable gel can be prepared. Test example 4
日薬理誌 99、 241〜 246 (1992) に記載の方法に準じ、 ゲル剤の肉 芽形成抑制能を試験した。  The gel was tested for its ability to inhibit granulation formation according to the method described in Jpn Pharmacology Journal 99, 241-246 (1992).
8週齢の雄ウィスター (Wi s t a r) ラットに 0. 5%/c—力ラゲニン (逗 子化学) 生食溶液を充填した浸透圧ミニポンプ (アルゼット ® (a 1 Z e t®) 、 モデル 2002) をペントパルビタール麻酔下で背部皮下に埋め込んだ。 すなわ ち、 刈毛、 消毒後肩甲骨間の中心を 1 cm程度切開し、 切開口から尾に向かって 皮下にポンプ装着のためのポケットを作った。 薬剤の流出部を先にしてポンプを 埋込し、 切開部ヒフを 1又は 2ケ所縫合後、 医療用接着剤で接着した。 翌日から 実施例 3-1、 実施例 2- 3および対照例 Aを 1日 1回、 14日間反復塗布した。 最終 投与翌日、 全例を過剰麻酔で安楽死させ、 ミニポンプ周囲の肉芽組織をポンプを 含めて摘出し、 肉芽を切開し、 ポンプを取り出し、 145後の肉芽組織の重量を 測定した。 対照例 Aとの有意差検定はダネット (Dunne t) 検定で行った。 なお、 各群 5匹を用いた。 8-week-old male Wistar (Wi star) 0. Rats 5% / c- force Ragenin (逗child Chemical) osmotic minipumps filled with saline solution (Alzet ® (a 1 Z et®), Model 2002) pent the It was implanted subcutaneously in the back under parbital anesthesia. In other words, after shaving and disinfection, an incision was made about 1 cm in the center between the scapulae, and a pocket for mounting a pump was made subcutaneously from the incision to the tail. The pump was implanted with the outflow part of the drug first, the incision part was sewn at one or two places, and then glued with a medical adhesive. From the next day, Example 3-1, Example 2-3 and Control A were applied once a day for 14 days. On the day after the final administration, all cases were euthanized with over anesthesia, the granulation tissue around the mini-pump was excised including the pump, the granulation was incised, the pump was removed, and the weight of the granulation tissue after 145 was measured. The significant difference test with control A was performed by Dunnett's test. In addition, 5 animals were used for each group.
対照例 Aはプロピレンダリコールを 25W/W%, ポリエチレングリコーノレ 4 Control A had 25% w / w of propylene dalicol, polyethylene glycolone 4
00を 12. 5 W/W%, サンジェロース 90Lを 1. 3 W/W%N および脱ィ オン水を 61. 2 WZW%からなる有効成分のピルフエ二ドンを含有しないゲル 剤である。 It is a gel agent that does not contain the active ingredient pirfenidone, which consists of 00 12.5 W / W%, Sangelose 90 L 1.3 W / W% N and deionized water 61.2 WZW%.
結果を図 2に示す。 本発明ゲル剤の塗布により肉芽形成が有意に抑制された。 産業上の利用の可能个生  The result is shown in figure 2. Granulation formation was significantly suppressed by applying the gel of the present invention. Individuals available for industrial use
本発明により、 ピルフエ二ドンに適した溶媒成分を選択する事で薬物の安定性 と皮膚移行性に優れた製剤が得られる。 また、 変性 HPMCの種類を選択する事で、 様々な溶媒量のゲルが形成され、 ピルフエ二ドン濃度の範囲が広がり、 溶媒量を 軽減させて皮膚刺激性の少ない製剤が得られる。  According to the present invention, a preparation having excellent drug stability and skin transfer properties can be obtained by selecting a solvent component suitable for pirfenidone. Also, by selecting the type of denatured HPMC, gels with various amounts of solvent are formed, the range of concentration of pirufenidone is widened, and the amount of solvent is reduced to obtain a formulation with less skin irritation.

Claims

請 求 の 範 囲 The scope of the claims
1 . 部分疎水化ヒドロキシプロピルメチルセルロースとともに、 有効成分とし て 5—メチルー 1一フエ二ルー 2— ( 1 H) —ピリドンまたはその製薬的に許容 される塩を含有するゲル剤。 1. A gel preparation containing, as an active ingredient, 5-methyl-1-phenyl-2- (1H) -pyridone or a pharmaceutically acceptable salt thereof together with partially hydrophobized hydroxypropylmethylcellulose.
2 . 溶媒成分をさらに含有する、 請求項 1記載のゲル剤。  2. The gel preparation according to claim 1, further comprising a solvent component.
3 . 溶媒成分がプロピレングリコール、 イソプロパノール、 ポリエチレンダリ コール、 N—メチル一2—ピロリドン、 ベンジルアルコールまたはそれらの混液 である、 請求項 2記載のゲル剤。  3. The gel preparation according to claim 2, wherein the solvent component is propylene glycol, isopropanol, polyethylene daricol, N-methyl-1-pyrrolidone, benzyl alcohol or a mixture thereof.
4 . 溶媒成分が重量平均分子量 3 8 0〜 4 2 0のポリエチレングリコールであ る、 請求項 3記載のゲル剤。  4. The gel preparation according to claim 3, wherein the solvent component is polyethylene glycol having a weight average molecular weight of 380 to 420.
5 . 溶媒成分の濃度がゲル剤全体に対して 5〜70W/W%である請求項 2力 ら 4ま での 、ずれか記載のゲル剤。  5. The gel preparation according to any one of claims 2 to 4, wherein the concentration of the solvent component is 5 to 70 W / W% based on the whole gel preparation.
6 . 有効成分の濃度がゲル剤全体に対して 0. 1〜 15W/W¾である、 請求項 1から 4までのいずれか記載のゲル剤。  6. The gel preparation according to any one of claims 1 to 4, wherein the concentration of the active ingredient is 0.1 to 15 W / W% based on the whole gel preparation.
7. 部分疎水化ヒドロキシプロピルメチルセルロースの濃度がゲル剤全体に対 して 0. 5〜5W/W。/。である、 請求項 1記載のゲル剤。  7. The concentration of partially hydrophobized hydroxypropyl methylcellulose is 0.5 to 5 W / W for the whole gel. /. The gel according to claim 1, which is:
8 . ゲル剤全体に対して有効成分の濃度が 0. 1〜15W/W%、 部分疎水化ヒドロキ シプロピルメチルセルロースの濃度が 0. 5〜5W/W%、 溶媒成分の濃度が 5〜 70W/W%である、 請求項 1記載のゲル剤。  8. The concentration of the active ingredient is 0.1-15 W / W%, the concentration of partially hydrophobized hydroxypropylmethylcellulose is 0.5-5 W / W%, and the concentration of the solvent component is 5-70 W / W. The gel according to claim 1, which is W%.
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US8287900B2 (en) 2007-05-25 2012-10-16 Lead Chemical Co., Ltd. Medicated patch comprising 5-methyl-1-phenyl-2-(1H)-pyridone
JP2008290984A (en) * 2007-05-25 2008-12-04 Lead Chemical Co Ltd Adhesive preparation containing 5-methyl-1-phenyl-2-(1h)-pyridone
US10376500B2 (en) 2007-08-14 2019-08-13 Cell Therapy and Technology S.A. DE C.V. Gel containing pirfenidone
WO2009022899A1 (en) * 2007-08-14 2009-02-19 Cell Therapy Technology, S.A. De C.V. Gel containing pirfenidone
US8492412B2 (en) 2007-08-14 2013-07-23 Cell Therapy And Technology, S.A. De C.V. Gel containing pirfenidone
US11779574B2 (en) 2007-08-14 2023-10-10 Excalibur Pharmaceuticals, Inc. Gel containing pirfenidone
US11083719B2 (en) 2007-08-14 2021-08-10 Excalibur Pharmaceuticals, Inc. Gel containing Pirfenidone
WO2010058844A1 (en) * 2008-11-21 2010-05-27 リードケミカル株式会社 Adhesive material containing 5-methyl-1-phenyl-2-(1h)-pyridone
US8568770B2 (en) 2008-11-21 2013-10-29 Lead Chemical Co., Ltd. Adhesive material containing 5-methyl-1-phenyl-2-(1H)-pyridone
WO2010065755A1 (en) 2008-12-04 2010-06-10 Concert Pharmaceuticals, Inc. Deuterated pyridinones
US9962374B2 (en) 2011-07-19 2018-05-08 Cell Therapy and Technology S.A. DE C.V. Process for the preparation of a pharmaceutical composition containing pirfenidone in sustained-release tablet form and its application in the regression of human chronic renal failure, breast capsular contracture and hepatic fibrosis
US10383862B2 (en) 2011-07-19 2019-08-20 Cell Therapy and Technology S.A. DE C.V. Methods of using a pharmaceutical composition containing pirfenidone in sustained-release tablet form
US11040030B2 (en) 2011-07-19 2021-06-22 Excalibur Pharmaceuticals, Inc. Methods of using a pharmaceutical composition containing pirfenidone in sustained-release tablet form
US11052074B2 (en) 2011-07-19 2021-07-06 Excalibur Pharmaceuticals, Inc. Process for the preparation of a pharmaceutical composition containing pirfenidone in sustained-release tablet form and its application in the regression of human chronic renal failure, breast capsular contracture and hepatic fibrosis
US9408836B2 (en) 2011-07-19 2016-08-09 Cell Therapy and Technology S.A. DE C.V. Pharmaceutical composition containing pirfenidone in sustained-release tablet form
US11013727B2 (en) 2012-03-28 2021-05-25 Excalibur Pharmaceuticals, Inc. Semi-solid topical composition containing pirfenidone and modified diallyl disulfide oxide (M-DDO) for eliminating or preventing acne
US9949959B2 (en) 2012-03-28 2018-04-24 Cell Therapy and Technology S.A. DE C.V. Semi-solid topical composition containing pirfenidone and modified diallyl disulfide oxide (M-DDO) for eliminating or preventing acne
US11766426B2 (en) 2012-03-28 2023-09-26 Excalibur Pharmaceuticals, Inc. Semi-solid topical composition containing pirfenidone and modified diallyl disulfide oxide (M-DDO) for eliminating or preventing acne
US10792258B2 (en) 2012-08-23 2020-10-06 Excalibur Pharmaceuticals, Inc. Antiseptic, antiseborrheic and exfoliating composition to remove or prevent acne
US11576905B2 (en) 2017-08-15 2023-02-14 Excalibur Pharmaceuticals, Inc. Topical semisolid composition containing an antimicrobial agent and pirfenidone for the treatment of chronic skin damage

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