JP2010155813A - Therapeutic agent for atopic dermatitis - Google Patents

Therapeutic agent for atopic dermatitis Download PDF

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JP2010155813A
JP2010155813A JP2009000185A JP2009000185A JP2010155813A JP 2010155813 A JP2010155813 A JP 2010155813A JP 2009000185 A JP2009000185 A JP 2009000185A JP 2009000185 A JP2009000185 A JP 2009000185A JP 2010155813 A JP2010155813 A JP 2010155813A
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atopic dermatitis
therapeutic agent
extract
yokukansan
itching
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Kyo Ko
挙 江
Takuji Yamaguchi
琢児 山口
Shigaku Ikeda
志斈 池田
Hiroyuki Kobayashi
弘幸 小林
Hideoki Ogawa
秀興 小川
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Juntendo University
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a new therapeutic agent for atopic dermatitis, particularly a therapeutic agent for atopic dermatitis excellent in antipruritic effect. <P>SOLUTION: The therapeutic agent for atopic dermatitis comprises Bupleuri radix, Uncaria thorn, Atractylodes lancea rhizome, Pachyma hoelen, Angelica acutiloba, Cnidium officinale and Glycyrrhiza uralensis as active ingredients. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、アトピー性皮膚炎治療剤、特にアトピー性皮膚炎の主症状である痒み抑制作用に優れたアトピー性皮膚炎治療剤に関する。   The present invention relates to a therapeutic agent for atopic dermatitis, and more particularly to a therapeutic agent for atopic dermatitis which is excellent in an itching suppressing action which is a main symptom of atopic dermatitis.

アトピー性皮膚炎は、アトピー型気管支喘息、アレルギー性鼻炎、皮膚炎の蕁麻疹を起しやすいアレルギー体質(アトピー素因)の上に、様々な刺激が加わって生じる痒みを伴う慢性の皮膚疾患である。その症状は、湿疹(皮膚の炎症)と強い痒みが主なものである。アトピー性皮膚炎の患者は、近々増加している。   Atopic dermatitis is a chronic skin disease with itching caused by various stimuli on top of allergic predisposition to atopic bronchial asthma, allergic rhinitis, and dermatitis urticaria (atopic predisposition) . Symptoms are mainly eczema (skin irritation) and strong itching. The number of patients with atopic dermatitis is increasing.

アトピー性皮膚炎の治療手段としては、ステロイド、免疫抑制剤、保湿剤、非ステロイド系抗炎症剤等の薬物療法、アレルゲンの除去、食事制限、皮膚や環境を清潔に保つ等の生活指導等が行なわれている(非特許文献1)。しかしながら、ステロイドや免疫抑制剤等は副作用の問題があり、安全で効果の高い治療手段が望まれている。   Treatment methods for atopic dermatitis include steroids, immunosuppressants, moisturizers, non-steroidal anti-inflammatory drugs and other drug therapies, allergen removal, dietary restrictions, and lifestyle guidance such as keeping the skin and the environment clean. (Non-Patent Document 1). However, steroids and immunosuppressants have problems of side effects, and safe and highly effective treatment means are desired.

アトピー性皮膚炎の主症状の一つである痒みは、QOLを侵す不快な感覚であるばかりか、痒みによって惹起される掻破行為が皮膚疾患をさらに悪化させたり、二次的な皮膚疾患を生んだりする。その意味では治療医学上きわめて重要な課題であるが、これまであまり関心を示されていなかった。そのため、痒みのメカニズムに関してもほとんど解明されておらず、慢性掻痒に有効な鎮痒薬もほとんどないのが現状である。   Itching, which is one of the main symptoms of atopic dermatitis, is not only an unpleasant sensation that affects QOL, but the scratching action caused by itching can further exacerbate skin diseases or cause secondary skin diseases Sloppy. In that sense, it is a very important issue in therapeutic medicine, but it has not shown much interest so far. Therefore, little is known about the mechanism of pruritus, and there is almost no antipruritic drug effective for chronic pruritus.

アトピー性皮膚炎治療ガイドライン2002Atopic Dermatitis Treatment Guidelines 2002

本発明の目的は、アトピー性皮膚炎の新たな治療剤、特に痒みに対する抑制効果に優れたアトピー性皮膚炎治療剤を提供することにある。   An object of the present invention is to provide a new therapeutic agent for atopic dermatitis, particularly an atopic dermatitis therapeutic agent having an excellent effect of suppressing itching.

そこで本発明者は、アトピー性皮膚炎のモデル動物を用い、特に掻痒回数等の痒み症状の改善効果について検討した結果、神経症、不眠症、小児夜なき、小児疳症等に有効とされる抑肝散が、アトピー性皮膚炎の皮膚症状及び痒みを顕著に改善する効果を有することを見出し、本発明を完成した。   Therefore, the present inventor used a model animal for atopic dermatitis and examined the effect of improving itching symptoms such as the number of pruritus in particular. As a result, the present inventor is effective for neurosis, insomnia, no childhood night, childhood mania, etc It has been found that Yokukansan has an effect of remarkably improving the skin symptoms and itching of atopic dermatitis, and has completed the present invention.

すなわち、本発明は、サイコ又はその抽出物、チョウトウコウ又はその抽出物、ソウジュツ又はその抽出物、ブクリョウ又はその抽出物、トウキ又はその抽出物、センキュウ又はその抽出物、及びカンゾウ又はその抽出物を有効成分とするアトピー性皮膚炎治療剤を提供するものである。   That is, the present invention relates to psycho or an extract thereof, butterfly or an extract thereof, sojutsu or an extract thereof, bukuryo or an extract thereof, touki or an extract thereof, senkyu or an extract thereof, and an licorice or an extract thereof. The present invention provides a therapeutic agent for atopic dermatitis as an active ingredient.

本発明のアトピー性皮膚炎治療剤を用いれば、アトピー性皮膚炎の皮膚炎症状(湿疹)だけでなく、痒みを顕著に改善することができる。痒みを改善すれば掻破行動が抑制される結果、皮膚症状の悪化が防止でき、ひいてはその症状も改善される。   If the therapeutic agent for atopic dermatitis of the present invention is used, not only the skin inflammation state (eczema) of atopic dermatitis but also itching can be remarkably improved. If itching is improved, the scratching behavior is suppressed, and as a result, the deterioration of skin symptoms can be prevented, and the symptoms are also improved.

皮膚症状に対する抑肝散の効果を示す図である。It is a figure which shows the effect of Yokukansan with respect to a skin symptom. 掻破回数に対する抑肝散の効果を示す図である。It is a figure which shows the effect of Yokukansan with respect to the number of scratches. 角層水分量に対する抑肝散の効果を示す図である。It is a figure which shows the effect of Yokukansan with respect to a stratum corneum water content. 毛繕い行動に対する抑肝散の効果を示す図である。It is a figure which shows the effect of Yokukansan with respect to hair repairing behavior.

本発明のアトピー性皮膚炎治療剤の有効成分は、サイコ又はその抽出物、チョウトウコウ又はその抽出物、ソウジュツ又はその抽出物、ブクリョウ又はその抽出物、トウキ又はその抽出物、センキュウ又はその抽出物、及びカンゾウ又はその抽出物の組み合わせである。これらの生薬の組み合わせは、抑肝散として漢方剤として用いられているが、アトピー性皮膚炎に対する作用は全く知られていない。   The active ingredient of the therapeutic agent for atopic dermatitis of the present invention is psycho or an extract thereof, butterfly or an extract thereof, sojutsu or an extract thereof, bukuryo or an extract thereof, touki or an extract thereof, senkyu or an extract thereof , And a combination of licorice or an extract thereof. These herbal medicine combinations are used as traditional Chinese medicines as yokukansan, but their effects on atopic dermatitis are not known at all.

サイコ(柴胡)は、セリ科ミシマサイコなどの根であり、中枢抑制作用、抗消化性潰瘍作用などを有することが知られている。チョウトウコウはアカネ科カギカズラなどの釣棘であり、小児のひきつけなどに用いられる。ソウジュツは、キク科のホソバオケラなどの根であり、抗消化清潰瘍作用、利胆作用などに用いられる。ブクリョウは、松の根に生じるサルノコシカケ科のマツホドの菌核を乾燥したものであり、利尿作用などを有する。トウキは、セリ科トウキの根であり、鎮静、鎮痛、強壮作用などを有する。センキュウはセリ科センキュウの根茎を湯通ししたものであり、中枢抑制作用、末梢血管拡張作用などを有する。カンゾウはマメ科カンゾウなどの根であり、鎮静・鎮痙作用、鎮咳作用などを有する。   Psycho (Saiko) is a root of the ciraceae Mishima psycho and is known to have a central inhibitory action, an anti-peptic ulcer action, and the like. The butterfly is a fishing spine such as the Rubiaceae lizard and is used to attract children. Sojutsu is the root of Asteraceae, such as Asteraceae, and is used for anti-digestion ulcer action, biliary action and the like. Bukuryo is a dried nuclei of the pine wood of the moss family that arises at the roots of pine, and has a diuretic action and the like. Toki is the root of the celery family Toki and has sedation, analgesia, tonicity and the like. Senkyu is a boiled rhizome of Aceraceae and has a central inhibitory action, peripheral vasodilatory action and the like. Licorice is the root of leguminous licorice and has sedative / antispasmodic activity, antitussive activity and the like.

これらの生薬はそのまま用いてもよいが、それぞれの抽出物を混合して用いることもできる。これらの生薬の抽出物としては、アトピー性皮膚炎治療効果を損なわない条件で抽出されたものであればよく、例えば水;メチルアルコール、エチルアルコールなどの低級アルコール;プロピレングリコール、1,3−ブチレングリコールなどの多価アルコール;アセトンなどのケトン類;ジエチルエーテル、ジオキサン、アセトニトリル、酢酸エチルエステルなどのエステル類;キシレン、ベンゼン、クロロホルムなどによる抽出物が挙げられる。これら溶媒は単独であるいは2種以上の混合溶媒を用いて抽出することもできる。これらのうち、水、低級アルコール又はこれらの混合溶媒により抽出したものが特に好ましい。   These herbal medicines may be used as they are, but the respective extracts can be mixed and used. These herbal extracts may be those extracted under conditions that do not impair the effect of treating atopic dermatitis, such as water; lower alcohols such as methyl alcohol and ethyl alcohol; propylene glycol, 1,3-butylene. Examples thereof include polyhydric alcohols such as glycols; ketones such as acetone; esters such as diethyl ether, dioxane, acetonitrile, and ethyl acetate; extracts using xylene, benzene, chloroform, and the like. These solvents can be extracted singly or using two or more mixed solvents. Of these, those extracted with water, lower alcohols or mixed solvents thereof are particularly preferred.

また抽出方法も特に限定されず、浸漬法や向流抽出法を採用することができる。また抽出物は、濃縮物、乾燥品などをそのまま用いてもよく、さらに各種の精製法により精製して用いてもよい。   Further, the extraction method is not particularly limited, and an immersion method or a countercurrent extraction method can be employed. The extract may be a concentrate, a dried product, or the like as it is, or may be further purified by various purification methods.

前記7種の生薬の配合割合は、原生薬重量換算で1〜50:1〜50:1〜50:1〜50:1〜50:1〜50:1〜50の範囲、特に1〜10:1〜10:1〜10:1〜10:1〜10:1〜10:1〜10の範囲が好ましい。また、抑肝散として処方されている配合割合であってもよい。   The blending ratio of the seven kinds of herbal medicines is in the range of 1-50: 1 to 50: 1 to 50: 1 to 50: 1 to 50: 1 to 50: 1 to 50, especially 1 to 10: The range of 1-10: 1-10: 1-10: 1-10: 1-10: 1-10 is preferable. Moreover, the mixture ratio prescribed as yokukansan may be sufficient.

後述の実施例に示すように、前記7種の生薬の混合物、例えば抑肝散は、アトピー性皮膚炎モデルに対して、皮膚症状の改善作用だけでなく、優れた痒み抑制作用を示す。また、これらの生薬の組み合わせは、漢方剤として長期間使用されており、安全性も確認されている。従って、前記7種の生薬を含有する医薬は、アトピー性皮膚炎治療剤、特にその痒み抑制用のアトピー性皮膚炎治療剤として有用である。   As shown in Examples described later, the mixture of the above seven herbal medicines, for example, Yokukansan, exhibits not only an improvement effect on skin symptoms but also an excellent itching suppression effect on an atopic dermatitis model. In addition, combinations of these herbal medicines have been used for a long time as traditional Chinese medicines, and safety has been confirmed. Therefore, the medicine containing the seven kinds of herbal medicines is useful as a therapeutic agent for atopic dermatitis, particularly as a therapeutic agent for atopic dermatitis for suppressing itching.

本発明のアトピー性皮膚炎治療剤は、経口及び外用のいずれの投与形態でも使用することができる。従って、これらの作用を目的とする医薬、医薬部外品、化粧料、機能性食品、特定保健用食品等として有用である。   The therapeutic agent for atopic dermatitis of the present invention can be used in both oral and external dosage forms. Therefore, it is useful as a medicine, quasi-drug, cosmetics, functional food, food for specified health use and the like for these actions.

本発明のアトピー性皮膚炎治療剤の経口投与用の形態としては、錠剤、顆粒、粉末、カプセル等の固形剤、ゲル剤、液剤、シロップ剤等の液剤等が挙げられる。また外用の形態としては、クリーム、軟膏、乳液、ローション、オイル、パックなどの形態が挙げられる。   Examples of the form for oral administration of the therapeutic agent for atopic dermatitis of the present invention include solid agents such as tablets, granules, powders and capsules, and liquid agents such as gels, solutions and syrups. Examples of the external form include creams, ointments, emulsions, lotions, oils, packs and the like.

本発明のアトピー性皮膚炎治療剤中の前記生薬又はその抽出物の含有量は特に制限されないが、原生薬重量換算で0.001〜100質量%、さらに0.1〜50質量%、特に0.1〜30質量%が好ましい。その投与量は1日あたり、原生薬重量換算で0.1〜10g、特に0.5〜10gとするのが好ましい。   The content of the crude drug or the extract thereof in the therapeutic agent for atopic dermatitis of the present invention is not particularly limited, but is 0.001 to 100% by mass, more preferably 0.1 to 50% by mass, especially 0 .1 to 30% by mass is preferable. The dose per day is preferably 0.1 to 10 g, particularly 0.5 to 10 g in terms of the weight of the drug substance.

次に実施例を挙げて本発明を詳細に説明する。   EXAMPLES Next, an Example is given and this invention is demonstrated in detail.

実施例1
(1)方法
10週齢の雄性NC/Ngaマウス(日本SLC,浜松)を用い、抑肝散投与前に、掻痒回数、皮膚症状を観察し、皮膚炎が発症しているマウスを実験に供した。抑肝散(株式会社ツムラ製)はMF飼料(オリエンタル酵母工業株式会社、東京)に0.5%、1.0%になるように配合し、自由摂取で12週間投与した。コントロール群はMF飼料で飼育した。12週間後、抑肝散1%群とコントロール群をクロスオーバーによる投与により効果を調べた。アトピー性皮膚炎に対する作用は、掻痒回数、皮膚症状を観察し、ストレスに対する作用は、毛繕い行動(Grooming)を指標に測定した。痒み回数(掻破行動)は、マウスを観察用ケージ(30分間放置)に入れ、掻破行動を30分間目視により測定した。掻破行動は、後肢による背部掻破と規定した。測定は14:00〜17:00の間に行なった。皮膚症状は、紅斑、浮腫、糜爛・出血、乾燥・脱毛各項目についてスコア化(著しいもの:3、中等度:2、軽症:1、ないもの:0)し、判定した。皮膚の状態は、投与前、12週後に背部の角層水分量をSkicon−200Exにより測定した。抑肝散の生薬配合割合(重量比)は、ソウジュツ2.7、ブクリョウ2.7、センキュウ2、チョウトウコウ2、トウキ2、サイコ1.3、カンゾウ1である。合計投与量は約1.4g/kgである。
Example 1
(1) Method Using a 10-week-old male NC / Nga mouse (Japan SLC, Hamamatsu), the number of pruritus and skin symptoms were observed before administration of yokukansan, and mice with dermatitis were used for the experiment. did. Yokukansan (manufactured by Tsumura Co., Ltd.) was mixed with MF feed (Oriental Yeast Co., Ltd., Tokyo) at 0.5% and 1.0%, and administered freely for 12 weeks. The control group was bred with MF feed. Twelve weeks later, the effect was examined by administration of the yokukansan 1% group and the control group by crossover. As for the effect on atopic dermatitis, the number of pruritus and skin symptoms were observed, and the effect on stress was measured using grooming behavior as an index. The number of itching (scratching behavior) was measured by visually observing the scratching behavior for 30 minutes by placing the mouse in an observation cage (left for 30 minutes). The scratching behavior was defined as a back scratching by the hind limb. The measurement was performed between 14:00 and 17:00. Skin symptoms were determined by scoring for each of the erythema, edema, wrinkle / bleeding, dryness / hair loss items (significant: 3, moderate: 2, mild: 1, none: 0). As for the skin condition, the horny layer water content of the back was measured with Skicon-200Ex after 12 weeks before administration. The herbal medicine blending ratio (weight ratio) of Yokukansan is Sojitsu 2.7, Bukuryo 2.7, Senkyu 2, Chouto 2, Toki 2, Psycho 1.3, and Licorice 1. The total dose is about 1.4 g / kg.

(2)結果
抑肝散は、NC/Ngaマウスの皮膚炎(図1)の悪化及び掻破行動(図2)を投与3週目より用量依存的に抑制し、角層水分量(図3)の低下を改善した。クロスオーバーにおいて、抑肝散投与中止により、掻破行動の増加、皮膚症状の悪化がみられ、抑肝散投与により掻破行動の抑制、皮膚症状の改善がみられた。NC/Ngaマウスの毛繕い行動(Grooming)を用量依存的に減少させた(図4)。
以上の結果から、抑肝散は,NC/Ngaマウスの掻破行動を抑制することにより皮膚病変の悪化を抑制したと考えられた。また、掻痒に伴うストレスを改善すると考えられた。
(2) Results Yokukansan suppressed the deterioration of dermatitis (Fig. 1) and scratching behavior (Fig. 2) of NC / Nga mice in a dose-dependent manner from the third week of administration, and the amount of horny layer water (Fig. 3). Improved decline. In the crossover, an increase in scratching behavior and worsening of skin symptoms were observed after administration of yokukansan, and suppression of scratching behavior and improvement of skin symptoms were observed after administration of yokukansan. The grooming behavior of NC / Nga mice was reduced in a dose-dependent manner (FIG. 4).
From these results, it was considered that Yokukansan suppressed the deterioration of skin lesions by suppressing the scratching behavior of NC / Nga mice. It was also thought to improve the stress associated with pruritus.

Claims (3)

サイコ又はその抽出物、チョウトウコウ又はその抽出物、ソウジュツ又はその抽出物、ブクリョウ又はその抽出物、トウキ又はその抽出物、センキュウ又はその抽出物、及びカンゾウ又はその抽出物を有効成分とするアトピー性皮膚炎治療剤。   Psycholic or extract thereof, butterfly or extract thereof, Sojutsu or extract thereof, Bukuryo or extract thereof, Toki or extract thereof, Senkyu or extract thereof, and atopy with licorice or extract thereof as active ingredients Dermatitis treatment agent. 有効成分が、抑肝散である請求項1記載のアトピー性皮膚炎治療剤。   The therapeutic agent for atopic dermatitis according to claim 1, wherein the active ingredient is yokukansan. 痒みを抑制するものである請求項1又は2記載のアトピー性皮膚炎治療剤。   The therapeutic agent for atopic dermatitis according to claim 1 or 2, which suppresses itching.
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