JP3602567B2 - Method for producing allergic inflammation inhibitor - Google Patents

Method for producing allergic inflammation inhibitor Download PDF

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Publication number
JP3602567B2
JP3602567B2 JP06709594A JP6709594A JP3602567B2 JP 3602567 B2 JP3602567 B2 JP 3602567B2 JP 06709594 A JP06709594 A JP 06709594A JP 6709594 A JP6709594 A JP 6709594A JP 3602567 B2 JP3602567 B2 JP 3602567B2
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allergic inflammation
culture
extract
inhibitory substance
solution
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JPH07274979A (en
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昭彦 藤原
澄 栗山
佳子 阿部
孝司 稲垣
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Sekisui Chemical Co Ltd
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Sekisui Chemical Co Ltd
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Description

【0001】
【産業上の利用分野】
本発明は、放線菌ストレプトマイセス・ノビリス(Streptomyces nobilis 、以下「S.ノビリス」と略記する)の菌体から溶剤抽出によりアレルギー性炎症抑制物質を製造する方法に関する。
【0002】
【従来の技術】
アレルギーは、ある抗原との2度目の接触の際に生じる免疫反応が、個々人によって過度にあるいは不適当な形で現われる一種の病的症状であって、関与する抗体の性質の違いからI型、II型、III 型およびIV型の反応に分類されている。これら4つの型のうち、III 型反応(免疫複合体反応:アルサス反応)およびIV型反応(細胞性免疫反応:遅延型過敏症反応)に関与するアレルギー性炎症反応は慢性関節リウマチのような自己免疫疾患、更には喘息、肝炎、腎炎、皮膚炎のような種々の炎症性疾患の発症進展に重要な役割を演じていることが明らかになってきた。
【0003】
しかしながら、従来の抗炎症剤であるアスピリン(日経サイエンス 3:70(1991))やインドメタシン(Ther. Res. 3:1057(1985) )は、アレルギー性炎症に対して抑制作用が極めて弱いという問題点がある。
【0004】
ところで、従来より放線菌培養濾液中には種々の抗生物質が見つけられており、当該培養濾液は生理活性物質の宝庫と言われている。
【0005】
本発明者らは、放線菌の培養液またはその乾固物の有機溶剤抽出物を用いてアレルギー性炎症抑制作用を有する物質の探索を行った結果、S.ノビリスの培養液またはその乾固物の有機溶剤抽出物中に顕著なアレルギー性炎症抑制作用を示し、かつヒトおよび動物に対する安全性についても全く問題がない物質を見いだすことに成功した(特開平5−25053号公報参照)。
【0006】
【発明が解決しようとする課題】
しかしながら、S.ノビリスの培養液またはその乾固物から有機溶剤によりアレルギー性炎症抑制物質を抽出してくる方法では、アレルギー性炎症抑制物質の生産量が低いことが問題となっていた。
【0007】
本発明の目的は、このような実情から、アレルギー性炎炎症抑制物質をより効率的に得ることができる方法を提供することにある。
【0008】
【課題を解決するための手段】
本発明者らは、S.ノビリスの菌体から有機溶剤で抽出した場合、より多くのアレルギー性炎症抑制物質が得られてくることを見いだし、この知見に基づき本発明を完成するに至った。
【0009】
すなわち、本発明によるアレルギー性炎症抑制物質の製造方法は、放線菌S.ノビリスの菌体(培養液またはその乾固物を含まない)酢酸エチル、アセトン、メタノールまたはこれらの混合液で抽出処理することを特徴とするものである。
【0010】
本発明組成物の原料である放線菌S.ノビリスは、公的保存機関から入手可能であり、たとえば理化学研究所の保存菌(JCM 4274)(これは米国においてATCC 19252およびオランダにおいてCBS 198.65としても保存)などの菌が使用できる。
【0011】
一般に放線菌S.ノビリスの培養は、以下のような栄養物を含んだ培地を用いて行われる。すなわち、液体培地の場合、その成分として、ブドウ糖などの糖類、ペプトンや麦芽エキスなどのタンパク質類、ビタミン類、核酸類、アミノ酸類、複合糖質類などの1種または複数種を含んだ水溶液が用いられる。その中でも好適な培地としては、澱粉・アンモニア系の液体培地が例示される。澱粉・アンモニウム系の培地の代表的な例としては、可溶性澱粉、リン酸水素二カリウム(KHPO)および塩化アンモニウム(NHCl)を含む液体培地が挙げられ、より好ましくは同培地に酵母エキスおよび/またはD−セリンが添加される。
【0012】
培地中の可溶性澱粉の濃度は好ましくは0.01〜5.0重量%、KHPOの濃度は好ましくは0.01〜5.0重量%、NHClの濃度は好ましくは0.01〜5.0重量%である。また、培地中に酵母エキスおよび/またはD−セリンを添加する場合は、酵母エキスの濃度は好ましくは0.01〜20.0重量%、D−セリンの濃度は好ましくは0.001〜1.0重量%である。
【0013】
液体培地のpHは2〜9の範囲が好ましく、培養温度は15〜42℃が好ましい。また液体培養の好ましい培養時間は1〜14日である。なお、固体培養の場合には、おもに上記の液体培養の培地にさらに寒天を含んだものを用いるが、固体培養の培養条件も液体培養のそれとほぼ同じである。
【0014】
こうして、S.ノビリスを培養した後、菌体の溶剤抽出を行う。
【0015】
溶剤抽出処理に当たり、超音波などで菌体を破壊してもよいし、そのまま菌体を溶剤と接触させてもよい。アレルギー性炎症抑制物質の抽出溶剤としては、酢酸エチル、アセトン、メタノールまたはこれらの混合液に限定される
【0016】
溶剤抽出の温度は特に限定されないが、好ましくは抽出を加熱下で行う。加熱温度は常圧下での溶剤の沸点以下の温度範囲である。また、抽出中は液を静置しておいても良いが、攪拌もしくは振とうする方が効率的である。好ましくは同一の菌体に対して抽出操作を複数回繰り返す。
【0017】
本発明方法により得られたアレルギー性炎症抑制物質をアレルギー性炎症抑制剤に製剤化するには、通常はアレルギー性炎症抑制物質を製剤用担体と共に製剤組成物の形態とする。担体としては剤形に応じた薬剤を調製するのに通常使用される充填剤、崩壊剤、増量剤、結合剤、付湿剤、表面活性剤、滑沢剤などの稀釈剤あるいは賦形剤が例示される。また適当な溶剤を選定することにより、得られた溶剤抽出液ないしはその濃縮物をそのままの形態で外用液剤として使用することもできる。
【0018】
本発明抽出物より得られたアレルギー性炎症抑制剤の投与単位形態としては、上記の如き外用液剤の外、錠剤、丸剤、飲用液剤、散剤、懸濁剤、乳剤、顆粒剤、カプセル剤、坐剤、注射剤(液剤、懸濁剤など)、軟膏剤などが例示される。
【0019】
アレルギー性炎症抑制剤中に含有すべきアレルギー性炎症抑制物質の量は、特に限定されず広範囲に適宜選択されるが、好ましくは炎症抑制剤中に0.1〜50重量%の範囲である。
【0020】
本発明抽出物より得られたアレルギー性炎症抑制剤は、その使用に際し各種形態に応じた方法で投与される。たとえば上記の如き外用液剤の場合には、これを皮膚ないしは粘膜などの所要部位に直接塗布し、錠剤、丸剤、飲用液剤、懸濁剤、乳剤、顆粒剤およびカプセル剤の場合には経口投与され、注射剤の場合には静脈内、筋肉内、皮内、皮下もしくは腹腔内投与され、坐剤の場合には直腸内投与され、また軟膏剤の場合には塗布される。
【0021】
アレルギー性炎症抑制剤の投与量は、使用目的、症状などにより適宜選択されるが、通常は1日当り本発明抽出物として0.5〜100mg/kg程度の範囲である。また上記製剤組成物を3〜4回/日に別けて投与することももちろん差し支えない。
【0022】
【実施例】
つぎに、本発明の実施例を挙げて、本発明を具体的に実証する。
【0023】
実施例1
500ml容の坂口フラスコ2本において、澱粉・アンモニウム培地(蒸留水100ml中に対し、可溶性澱粉を1g、KHPOを0.05g、NHClを0.05gを含む)をそれぞれ125mlを調製した。ついで、これらの培地に、理化学研究所から購入した放線菌S.ノビリス(JCM4274)を接種し、振盪培養器(TAITEC社製、Bio−Shaker BR−300L)を用いて、30℃、160rpmで96時間振盪培養した。培養終了後、培養液を遠心分離(2500G×10min)し、菌体を得た。この菌体にアセトンを30ml添加し、30分間ソニケーションをした。続いて、10分間振盪後、遠心分離(3,000G×10min)した。同操作を3回繰り返し、得たアセトン相を合わせてエバポレーターで濃縮乾固し、抽出物を得た。この抽出物を2mlのメタノールに溶かしたものを、高速液体クロマトグラフィー(以下、「HPLC」と略記する)を用いた分析用試料とした。
【0024】
まず、HPLCでアレルギー性炎症抑制物質を定量するために、以下のように検量線を作成した。アレルギー性炎症抑制物質は、ODSカラム(東ソー社製、ODS−80TM、φ4.6MMID×25.0CML)を用いたHPLC(日立社製、ポンプL−6000L−6200、検出器L−3000、カラムオーブン65A−52)において、検出波長210nm、温度40℃、流速1ml/minの条件で、溶離液として水:アセトニトリル:メタノール=6:7:7を用いた場合、41〜45分のリテンションタイムを示すことがわかっている。このことを利用して、アレルギー性炎症抑制物質をメタノールに溶解させて 2、 5、10、20、50、100 μg/mlとしたものの40μl、すなわち0.08、0.2 、0.4 、0.8 、2.0 、4.0 μgをそれぞれ上記条件でHPLCに供し、アレルギー性炎症抑制物質量とピーク面積との関係を調べた。このとき、0.2 〜2.0 μgの範囲で直線関係があることがわかり、直線回帰計算により得られた直線を、アレルギー性炎症抑制物質検量線とした。
【0025】
次いで、上記の分析用試料を同じ条件でHPLCに供し、得られたアレルギー性炎症抑制物質のピーク面積から、上記検量線によりアレルギー性炎症抑制物質の含有量を計算した。
【0026】
培養時間とアレルギー性炎症抑制物質生産量との関係を表1に示す。
【0027】
実施例2
500ml容の坂口フラスコ2本において、澱粉・アンモニウム培地(蒸留水100ml中に、可溶性澱粉を1g、K2 HPO4 を0.05g、NH4 Clを0.05gを含む)に酵母エキス(DIFCO社製、イーストエクストラクト)0.2重量%を添加して、それぞれ液体培地125mlを調製した。ついで、これらの培地に、理化学研究所から購入した放線菌S.ノビリス(JCM4274)を接種し、振盪培養器(TAITEC社製、Bio-Shaker BR-300L)を用いて、30℃、160rpmで96時間振盪培養(種培養)した。さらに、10リットル容ジャーファーメンター(三ツワバイオシステム社製、KMJ-10C-FPMIII)において、澱粉・アンモニウム培地(蒸留水100ml中に対し、可溶性澱粉を1g、K2 HPO4 を0.05g、NH4 Clを0.05gを含む)に酵母エキス(DIFCO社製、イーストエクストラクト)0.2重量%を添加して、液体培地6リットルを調製した。この培地に、上記種培養液の42mlを接種し、30℃、380rpmで6日間、通気攪拌しながら培養を行った。なお、通気量は2リットル/minとし、pHは0.1NのHClおよびNaOHを用いて6.5に保った。培養終了後、培養液を遠心分離(3000G×10min)し、菌体を得た。この菌体にアセトンを200ml添加し、30分間ソニケーションをした。続いて、10分間振盪後、遠心分離(3,000G×10min)した。同操作を5回繰り返し、得たアセトン相を合わせてエバポレーターで濃縮乾固し、抽出物を得た。この抽出物を実施例1と同様の方法で処理し、HPLC分析によりアレルギー性炎症抑制物質含有量を測定した。培養時間とアレルギー性炎症抑制物質生産量との関係を表2に示す。
【0028】
比較例1
実施例1において培養液の遠心分離により得られた上清について、これと等量の酢酸エチルを用いて3回抽出を行った。得た酢酸エチル相を合わせてエバポレーターで濃縮乾固し、抽出物を得た。この抽出物を実施例1と同様の方法で処理し、HPLC分析によりアレルギー性炎症抑制物質含有量を測定した。
【0029】
その結果を実施例1の結果とともに表1に示す。
【0030】
アレルギー性炎症抑制物質を有機溶剤で抽出する際、培養液の上清を有機溶剤で抽出した場合には、培養液1リットル当たり45.13μgの抑制物質を得た。これに対し、同培養液の遠心分離により得られた菌体を有機溶剤で抽出した場合には、培養液1リットル当たり104.13μgの炎症抑制物質を得た。すなわち、菌体からの抽出により、約2.3倍のアレルギー性炎症抑制物質を得ることができた。
【0031】
比較例2
実施例2において培養液の遠心分離により得られた上清について、これと等量の酢酸エチルを用いて3回抽出を行った。得た酢酸エチル相を合わせてエバポレーターで濃縮乾固し、抽出物を得た。この抽出物を実施例1と同様の方法で処理し、HPLC分析によりアレルギー性炎症抑制物質含有量を測定した。
【0032】
その結果を実施例2の結果とともに表2に示す。
【0033】
アレルギー性炎症抑制物質を有機溶剤で抽出する際、培養液の上清を有機溶剤で抽出した場合には、培養液1リットル当たり104.9μgの抑制物質を得た。これに対し、同培養液の遠心分離により得られた菌体を有機溶剤で抽出した場合には、培養液1リットル当たり657.7μgの炎症抑制物質を得た。すなわち、菌体からの抽出により、約6.3倍のアレルギー性炎症抑制物質を得ることができた。
【0034】
【表1】

Figure 0003602567
【表2】
Figure 0003602567
試験例1 III 型アレルギー反応に対する作用
i) ウサギ抗オボアルブミン (ovalbumin)血清の調製
江田らの方法(日薬理誌、66巻、237頁、1970年)に準じて、つぎの手法でウサギ抗オボアルブミン血清を調製した。すなわち、生理的食塩水に溶解したオボアルブミン(Sigma 社製)の2mg/ml溶液と完全フロイントアジュバント(Difco 社製)との等量混合乳化液よりなる抗原液を調製した。この抗原液の0.5mlずつを体重約3kgのニュージーランド産ホワイト種の雄性家兎の左右臀筋内に1週間毎に4回注射した。最終注射の7日後に頸動脈から採血し、血清のみを分離取得し、ウサギ抗オボアルブミン血清とした。この抗血清のラット4時間異種受身皮膚アナフィラキシー(4時間 heterologous PCA)反応の力価は1:32であった。
【0035】
ii) ラット4時間異種PCA反応( III型アレルギー性皮膚反応)
に対する作用
実施例2で得られた菌体抽出物を、最終濃度が50mg/ml(アレルギー性炎症抑制物質として0.25mg/ml相当量)になるように、5重量%アラビアゴム水溶液にジメチルスルホキサイドを5重量%添加してなる溶液に懸濁した。こうして得られた懸濁液を供試液とした。被検動物としては体重120〜200gのウイスター雄性ラットを用いた。
【0036】
まず、上記供試液をラットに2ml/kg(アレルギー性炎症抑制物質として0.5mg/ml)で腹腔内投与しておいた。
【0037】
ついで供試液投与の18〜22時間後に、上記ウサギ抗オボアルブミン血清を生理的食塩水で4倍に希釈してなる注射液0.05mlを、上記ラットの背部皮内に注射し、ラットを上記抗血清で感作した。
【0038】
つぎに、上記抗血清投与の4時間後に、対応する抗原として2mg/mlのオボアルブミンを含む0.5重量%エバンスブルー生理的食塩水を2.5ml/kg静脈内注射して、4時間異種PCA反応を惹起した。
【0039】
こうして皮内反応を惹起した部位の漏出色素を、Haradaらの方法(J.Pharm.Pharmacol. 23巻、218頁、1971年)に従って抽出定量した。すなわち、抗原注射の1時間後に動物を屠殺し、4時間異種PCA反応部の皮膚を細切し、これを0.3%(w/v)硫酸ナトリウム水溶液3容とアセトン7容の混合液中に24時間浸漬放置し、漏出色素を抽出した。こうして抽出した色素を620nmで比色定量し、漏出色素量を求め、これをウサギ抗オボアルブミン血清を注射した部位(site)当たりの漏出色素量(μg)として表わした。
【0040】
比較のために、比較例2で得られた培養液上清抽出物を、最終濃度が55mg/ml(アレルギー性炎症抑制物質として0.25mg/ml相当量)になるように、5重量%アラビアゴム水溶液にジメチルスルホキサイドを5重量%添加してなる溶液に懸濁した。こうして得られた懸濁液を比較用供試液とし、その他の点は上記操作と同様に行って漏出色素量を求めた。
【0041】
この試験のコントロールとして、上記抽出物含有液の代わりに、アレルギー性炎症抑制物質を含まない上記ジメチルスルホキサイド含有アラビアゴム水溶液を用い、その他の点は上記操作と同様に行って漏出色素量を求めた。
【0042】
これらの試験は、それぞれ5匹のラットを用いて行い、漏出色素量(μg/site)はこれらラットについて得られた値の平均値をとった。
【0043】
なお、コントロールは上記それぞれの試験毎にコントロール試験を行った。
【0044】
その結果、菌体抽出物を含有する供試液を投与した群は、培養液上清抽出物を含有する供試液を投与した群とともに、コントロール群にくらべ、ラット4時間異種PCA反応部の皮膚に漏出する色素量が大幅に減少し、顕著なアレルギー性炎症抑制活性を示した。すなわち、菌体中に存在する物質においても、培養液中の物質と同様にアレルギー性炎症抑制活性を有することがわかった。
【0045】
【発明の効果】
本発明によれば、放線菌ストレプトマイセス・ノビリスの菌体を酢酸エチル、アセトン、メタノールまたはこれらの混合液で抽出処理することにより、アレルギー性炎症抑制物質を効率的に得ることができる。[0001]
[Industrial application fields]
The present invention relates to a method for producing an allergic inflammation inhibitor by solvent extraction from cells of Streptomyces nobilis (hereinafter abbreviated as “S. nobilis”).
[0002]
[Prior art]
Allergy is a type of pathological condition in which an immune reaction that occurs upon a second contact with an antigen appears excessively or inappropriately by an individual, due to differences in the nature of the antibodies involved, type I, Classified into type II, type III and type IV reactions. Among these four types, allergic inflammatory reactions involved in type III reaction (immune complex reaction: Arthus reaction) and type IV reaction (cellular immune reaction: delayed hypersensitivity reaction) are self-affected by rheumatoid arthritis. It has become clear that it plays an important role in the development of immune diseases, as well as various inflammatory diseases such as asthma, hepatitis, nephritis, and dermatitis.
[0003]
However, aspirin (Nikkei Science 3:70 (1991)) and indomethacin (Ther. Res. 3: 1057 (1985)), which are conventional anti-inflammatory agents, have an extremely weak inhibitory action against allergic inflammation. There is.
[0004]
By the way, various antibiotics have been conventionally found in the actinomycete culture filtrate, and the culture filtrate is said to be a treasure trove of physiologically active substances.
[0005]
As a result of searching for a substance having an allergic inflammation inhibitory effect using the organic solvent extract of actinomycete culture solution or its dried solid, the present inventors have found that In the organic solvent extract of Nobilis or its dried product, a substance that exhibits a remarkable allergic inflammation-inhibiting action and has no problem with respect to safety to humans and animals has been successfully found (Japanese Patent Laid-Open No. 5). -25053).
[0006]
[Problems to be solved by the invention]
However, S.M. In the method of extracting an allergic inflammation inhibitory substance with an organic solvent from a culture medium of Nobilis or a dried product thereof, the production amount of the allergic inflammation inhibitory substance is low.
[0007]
An object of the present invention is to provide a method capable of more efficiently obtaining an allergic inflammation-inhibiting substance from such a situation.
[0008]
[Means for Solving the Problems]
The inventors have described S.I. It has been found that more allergic inflammation-inhibiting substances can be obtained when extracted from cells of Nobilis with an organic solvent, and the present invention has been completed based on this finding.
[0009]
That is, the method for producing an allergic inflammation inhibitory substance according to the present invention comprises actinomycetes S. cerevisiae. Nobilis cells (not including the culture solution or dried product thereof) are extracted with ethyl acetate, acetone, methanol or a mixture thereof .
[0010]
Actinomyces S., which is a raw material of the composition of the present invention. Nobilis can be obtained from public preservation institutions, for example, bacteria such as a preserved bacterium from RIKEN (JCM 4274) (which is also preserved as ATCC 19252 in the United States and CBS 198.65 in the Netherlands).
[0011]
In general, actinomycetes Nobilis is cultured using a medium containing the following nutrients. That is, in the case of a liquid medium, an aqueous solution containing one or more kinds of sugars such as glucose, proteins such as peptone and malt extract, vitamins, nucleic acids, amino acids, complex carbohydrates and the like as components thereof. Used. Among them, a preferable medium is a starch / ammonia liquid medium. A typical example of a starch / ammonium-based medium is a liquid medium containing soluble starch, dipotassium hydrogen phosphate (K 2 HPO 4 ) and ammonium chloride (NH 4 Cl), and more preferably Yeast extract and / or D-serine is added.
[0012]
The concentration of soluble starch in the medium is preferably 0.01 to 5.0% by weight, the concentration of K 2 HPO 4 is preferably 0.01 to 5.0% by weight, and the concentration of NH 4 Cl is preferably 0.01. -5.0 wt%. Moreover, when adding a yeast extract and / or D-serine in a culture medium, the density | concentration of a yeast extract becomes like this. Preferably the density | concentration of D-serine becomes like 0.001-1. 0% by weight.
[0013]
The pH of the liquid medium is preferably in the range of 2-9, and the culture temperature is preferably 15-42 ° C. The preferred culture time for liquid culture is 1 to 14 days. In the case of solid culture, the above liquid culture medium further containing agar is used, but the culture conditions for solid culture are almost the same as those for liquid culture.
[0014]
Thus, S.M. After cultivating Nobilis, the cells are subjected to solvent extraction.
[0015]
In the solvent extraction treatment, the bacterial cells may be destroyed by ultrasonic waves or the like, or the bacterial cells may be brought into contact with the solvent as they are. As the extraction solvent for allergic inflammation inhibitors, ethyl acetic acid, acetone, it is limited to methanol or a mixture thereof.
[0016]
Although the temperature of solvent extraction is not specifically limited, Preferably extraction is performed under a heating. The heating temperature is in the temperature range below the boiling point of the solvent under normal pressure. In addition, the liquid may be allowed to stand during extraction, but stirring or shaking is more efficient. Preferably, extraction operation is repeated several times with respect to the same microbial cell.
[0017]
In order to formulate the allergic inflammation inhibitory substance obtained by the method of the present invention into an allergic inflammation inhibitory agent, the allergic inflammation inhibitory substance is usually in the form of a pharmaceutical composition together with a pharmaceutical carrier. As the carrier, there are used diluents or excipients such as fillers, disintegrants, extenders, binders, moisturizers, surfactants, lubricants and the like that are usually used to prepare drugs according to the dosage form. Illustrated. In addition, by selecting an appropriate solvent, the obtained solvent extract or its concentrate can be used as it is as an external solution.
[0018]
Examples of the dosage unit form of the allergic inflammation inhibitor obtained from the extract of the present invention include tablets, pills, drinking liquids, powders, suspensions, emulsions, granules, capsules, in addition to the above-mentioned external liquids. Examples are suppositories, injections (solutions, suspensions, etc.), ointments and the like.
[0019]
The amount of the allergic inflammation inhibitory substance to be contained in the allergic inflammation inhibitor is not particularly limited and is appropriately selected over a wide range, but is preferably in the range of 0.1 to 50% by weight in the inflammation inhibitor.
[0020]
The allergic inflammation inhibitor obtained from the extract of the present invention is administered by a method according to various forms when used. For example, in the case of the above-mentioned external liquid preparation, it is applied directly to the required site such as the skin or mucous membrane, and in the case of tablets, pills, drinking liquids, suspensions, emulsions, granules and capsules, it is orally administered. In the case of injections, they are administered intravenously, intramuscularly, intradermally, subcutaneously or intraperitoneally, in the case of suppositories, intrarectally, and in the case of ointments.
[0021]
The dosage of the allergic inflammation inhibitor is appropriately selected depending on the purpose of use, symptoms and the like, but is usually in the range of about 0.5 to 100 mg / kg as the extract of the present invention per day. Of course, the pharmaceutical composition may be administered 3 to 4 times per day.
[0022]
【Example】
Next, the present invention will be concretely demonstrated with examples of the present invention.
[0023]
Example 1
In two 500 ml Sakaguchi flasks, 125 ml each of starch / ammonium medium (containing 1 g of soluble starch, 0.05 g of K 2 HPO 4 and 0.05 g of NH 4 Cl per 100 ml of distilled water) did. Subsequently, actinomycetes S. cerevisiae purchased from RIKEN were added to these media. Nobilis (JCM4274) was inoculated and cultured with shaking at 96 ° C. for 96 hours at 160 ° C. using a shaking incubator (manufactured by TAITEC, Bio-Shaker BR-300L). After completion of the culture, the culture solution was centrifuged (2500 G × 10 min) to obtain bacterial cells. 30 ml of acetone was added to the cells and sonicated for 30 minutes. Subsequently, the mixture was shaken for 10 minutes and then centrifuged (3,000 G × 10 min). The same operation was repeated three times, and the obtained acetone phases were combined and concentrated to dryness with an evaporator to obtain an extract. An extract obtained by dissolving this extract in 2 ml of methanol was used as an analytical sample using high performance liquid chromatography (hereinafter abbreviated as “HPLC”).
[0024]
First, in order to quantify the allergic inflammation inhibitory substance by HPLC, a calibration curve was prepared as follows. The allergic inflammation inhibitor is HPLC (Hitachi, pump L-6000L-6200, detector L-3000, column oven) using an ODS column (manufactured by Tosoh Corporation, ODS-80TM, φ4.6MMID × 25.0CML). 65A-52), when water: acetonitrile: methanol = 6: 7: 7 is used as an eluent under conditions of a detection wavelength of 210 nm, a temperature of 40 ° C., and a flow rate of 1 ml / min, a retention time of 41 to 45 minutes is shown. I know that. Using this, 40 μl of the allergic inflammation inhibitory substance dissolved in methanol to make 2, 5, 10, 20, 50, 100 μg / ml, that is, 0.08, 0.2, 0.4, 0.8, 2.0, and 4.0 μg were each subjected to HPLC under the above conditions, and the relationship between the amount of allergic inflammation inhibitory substance and the peak area was examined. At this time, it was found that there was a linear relationship in the range of 0.2 to 2.0 μg, and the straight line obtained by linear regression calculation was used as a calibration curve for allergic inflammation inhibitors.
[0025]
Next, the sample for analysis was subjected to HPLC under the same conditions, and the content of the allergic inflammation inhibitory substance was calculated from the peak area of the obtained allergic inflammation inhibitory substance using the calibration curve.
[0026]
Table 1 shows the relationship between the culture time and the amount of allergic inflammation inhibitory substance produced.
[0027]
Example 2
In two 500 ml Sakaguchi flasks, yeast extract (DIFCO) containing starch / ammonium medium (1 g of soluble starch, 0.05 g of K 2 HPO 4 and 0.05 g of NH 4 Cl in 100 ml of distilled water). (Manufactured by Yeast Extract) 0.2% by weight was added to prepare 125 ml of liquid medium. Subsequently, actinomycetes S. cerevisiae purchased from RIKEN were added to these media. Nobilis (JCM4274) was inoculated, and shaking culture (seed culture) was performed at 30 ° C. and 160 rpm for 96 hours using a shaking incubator (manufactured by TAITEC, Bio-Shaker BR-300L). Further, in a 10 liter jar fermenter (manufactured by Mitsuwa Biosystems, KMJ-10C-FPMIII), 1 g of soluble starch and 0.05 g of K 2 HPO 4 in 100 ml of distilled water, 0.2 wt% of yeast extract (manufactured by DIFCO, yeast extract) was added to 0.05 g NH 4 Cl) to prepare 6 liters of liquid medium. This medium was inoculated with 42 ml of the above seed culture and cultured at 30 ° C. and 380 rpm for 6 days with aeration and agitation. The aeration rate was 2 liters / min, and the pH was maintained at 6.5 using 0.1 N HCl and NaOH. After completion of the culture, the culture solution was centrifuged (3000 G × 10 min) to obtain bacterial cells. 200 ml of acetone was added to the cells and sonicated for 30 minutes. Subsequently, the mixture was shaken for 10 minutes and then centrifuged (3,000 G × 10 min). The same operation was repeated 5 times, and the obtained acetone phases were combined and concentrated to dryness with an evaporator to obtain an extract. This extract was treated in the same manner as in Example 1, and the allergic inflammation inhibitory substance content was measured by HPLC analysis. Table 2 shows the relationship between the culture time and the amount of allergic inflammation inhibitory substance produced.
[0028]
Comparative Example 1
The supernatant obtained by centrifuging the culture solution in Example 1 was extracted three times using an equivalent amount of ethyl acetate. The obtained ethyl acetate phases were combined and concentrated to dryness with an evaporator to obtain an extract. This extract was treated in the same manner as in Example 1, and the allergic inflammation inhibitory substance content was measured by HPLC analysis.
[0029]
The results are shown in Table 1 together with the results of Example 1.
[0030]
When the allergic inflammation inhibitory substance was extracted with an organic solvent, when the culture supernatant was extracted with an organic solvent, 45.13 μg of the inhibitory substance was obtained per liter of the culture liquid. In contrast, when the cells obtained by centrifugation of the culture broth were extracted with an organic solvent, 104.13 μg of an inflammation inhibitory substance was obtained per liter of the broth. That is, an allergic inflammation inhibitory substance about 2.3 times as large as that obtained by extraction from bacterial cells could be obtained.
[0031]
Comparative Example 2
The supernatant obtained by centrifuging the culture solution in Example 2 was extracted three times using an equivalent amount of ethyl acetate. The obtained ethyl acetate phases were combined and concentrated to dryness with an evaporator to obtain an extract. This extract was treated in the same manner as in Example 1, and the allergic inflammation inhibitory substance content was measured by HPLC analysis.
[0032]
The results are shown in Table 2 together with the results of Example 2.
[0033]
When the allergic inflammation inhibitor was extracted with an organic solvent, when the culture supernatant was extracted with an organic solvent, 104.9 μg of the inhibitor was obtained per liter of the culture. On the other hand, when the cells obtained by centrifugation of the culture broth were extracted with an organic solvent, 657.7 μg of an inflammation-inhibiting substance was obtained per liter of the broth. That is, by extracting from bacterial cells, an allergic inflammation inhibitory substance about 6.3 times larger could be obtained.
[0034]
[Table 1]
Figure 0003602567
[Table 2]
Figure 0003602567
Test Example 1 Action on Type III Allergic Reaction i) Preparation of Rabbit Anti-Ovalbumin (Ovalbumin) Serum According to the method of Eda et al. (Nippon Pharmacology, 66, 237, 1970) Albumin serum was prepared. That is, an antigen solution consisting of an equal volume mixed emulsion of a 2 mg / ml solution of ovalbumin (manufactured by Sigma) dissolved in physiological saline and complete Freund's adjuvant (manufactured by Difco) was prepared. Each 0.5 ml of this antigen solution was injected four times a week into the left and right gluteal muscles of a New Zealand white male rabbit weighing approximately 3 kg. Seven days after the final injection, blood was collected from the carotid artery, and only the serum was isolated and obtained as rabbit anti-ovalbumin serum. The titer of this antiserum rat 4 hour heterogeneous passive skin anaphylaxis (4 hour heterologous PCA) reaction was 1:32.
[0035]
ii) Rat 4-hour heterogeneous PCA reaction (type III allergic skin reaction)
The microbial cell extract obtained in Example 2 was diluted with 5% by weight arabic gum aqueous solution so that the final concentration was 50 mg / ml (corresponding to 0.25 mg / ml as an allergic inflammation inhibitor). The suspension was suspended in a solution containing 5% by weight of xoxide. The suspension thus obtained was used as a test solution. As test animals, Wistar male rats weighing 120 to 200 g were used.
[0036]
First, the above test solution was intraperitoneally administered to rats at 2 ml / kg (0.5 mg / ml as an allergic inflammation inhibitory substance).
[0037]
Next, 18 to 22 hours after administration of the test solution, 0.05 ml of an injection solution obtained by diluting the rabbit anti-ovalbumin serum 4 times with physiological saline was injected into the back skin of the rat, and the rat was Sensitized with antiserum.
[0038]
Next, 4 hours after the administration of the above antiserum, 0.5 wt.% Evans blue physiological saline containing 2 mg / ml ovalbumin as the corresponding antigen was intravenously injected at 2.5 ml / kg for 4 hours. A PCA reaction was elicited.
[0039]
The leaking dye at the site that caused the intradermal reaction was extracted and quantified according to the method of Harada et al. (J. Pharm. Pharmacol. 23, 218, 1971). That is, the animal was sacrificed 1 hour after the antigen injection, and the skin of the heterogeneous PCA reaction part was minced for 4 hours. For 24 hours to extract the leaking dye. The dye thus extracted was colorimetrically determined at 620 nm to determine the amount of the leaked dye, and this was expressed as the amount of the leaked dye (μg) per site injected with the rabbit anti-ovalbumin serum.
[0040]
For comparison, the culture broth supernatant extract obtained in Comparative Example 2 was mixed with 5% by weight of Arabic so that the final concentration was 55 mg / ml (equivalent to 0.25 mg / ml as an allergic inflammation inhibitor). It was suspended in a solution obtained by adding 5% by weight of dimethyl sulfoxide to an aqueous rubber solution. The suspension thus obtained was used as a test solution for comparison, and other points were carried out in the same manner as described above to determine the amount of leaking dye.
[0041]
As a control for this test, instead of the extract-containing liquid, the dimethyl sulfoxide-containing aqueous gum arabic solution containing no allergic inflammation inhibitory substance was used. Asked.
[0042]
These tests were carried out using 5 rats each, and the amount of dye leaked (μg / site) was the average of the values obtained for these rats.
[0043]
In addition, control performed the control test for every said test.
[0044]
As a result, the group administered with the test liquid containing the bacterial cell extract, together with the group administered with the test liquid containing the culture supernatant extract, was exposed to the skin of the rat 4-hour heterologous PCA reaction area compared to the control group. The amount of dye that leaked out was greatly reduced, and a remarkable allergic inflammation inhibitory activity was exhibited. That is, it was found that the substance present in the microbial cells has allergic inflammation inhibitory activity as well as the substance in the culture solution.
[0045]
【The invention's effect】
According to the present invention, allergic inflammation-inhibiting substances can be efficiently obtained by subjecting actinomycetes Streptomyces nobilis cells to extraction treatment with ethyl acetate, acetone, methanol or a mixture thereof.

Claims (1)

放線菌ストレプトマイセス・ノビリス(Streptomyces nobilis )の菌体(培養液またはその乾固物を含まない)酢酸エチル、アセトン、メタノールまたはこれらの混合液で抽出処理することを特徴とするアレルギー性炎症抑制物質の製造方法。Allergic inflammation characterized by extraction treatment of Streptomyces nobilis cells (not including culture solution or dried product thereof) with ethyl acetate, acetone, methanol or a mixture thereof Method for producing inhibitory substance.
JP06709594A 1994-04-05 1994-04-05 Method for producing allergic inflammation inhibitor Expired - Fee Related JP3602567B2 (en)

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