JP5313693B2 - 消化性潰瘍疾患の治療のために有用なオエノテインcを含む医薬組成物 - Google Patents
消化性潰瘍疾患の治療のために有用なオエノテインcを含む医薬組成物 Download PDFInfo
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- JP5313693B2 JP5313693B2 JP2008553848A JP2008553848A JP5313693B2 JP 5313693 B2 JP5313693 B2 JP 5313693B2 JP 2008553848 A JP2008553848 A JP 2008553848A JP 2008553848 A JP2008553848 A JP 2008553848A JP 5313693 B2 JP5313693 B2 JP 5313693B2
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Description
本発明は、化合物オエノテイン(oenothein)Cの治療上有効量、場合により1以上の薬学的に許容される担体、添加物、滑剤及び希釈剤を含む医薬組成物に関する。
消化性潰瘍疾患(PUD)は、様々な種類に胃潰瘍及び十二指腸潰瘍を包含する広範な分類であり、それらの全ては、1以上の胃腸管部位に一列に並ぶ粘膜の糜爛として、臨床的に特徴付けられる。PUDは、挑戦的因子と防御的因子との間のバランスが存在する時には起こらない。前者因子が通常より強くなる時か、又は後者因子が弱くなる時のみに現われる [I]。しかしながら、現在、ヘリコバクター・ピロリが、十二指腸潰瘍の90%超及び胃潰瘍の70〜80%超に存在することは受け入れられていない [2]。従って、PUDは、感染性疾患として現在治療され、抗生物質で治療されている。
従って、本発明は、酸HCl及び微生物H.ピロリが2つの主な病因である消化性潰瘍疾患を効果的に治療するだろう、植物花のウッドフォーディア・フルクティコサの水溶性メタノール(50%)抽出物からバイオアッセイによる分画手法によって単離した、化合物エノテリンCの治療上有効量を含む医薬組成物を開発するために努められた。
本発明の主な目的は、消化性潰瘍疾患を治療するために有用な医薬組成物を提供することである。
従って、本発明は、植物ウッドフォーディア・フルクティコサの生物活性分画から得られた化合物オエノテインCの治療上有効量、場合により1以上の薬学的に許容される担体、添加物、滑剤及び希釈剤を含む医薬組成物に関する。更に、本発明はまた、前記医薬物を用いて対象における消化性潰瘍疾患を治療する方法を提供する。本発明はまた、消化性潰瘍疾患の治療における化合物オエノテインCの使用、及び前記化合物の単離方法に関する。
表2は、オエノテインC及びクラリスロマイシンの抗H.ピロリ活性を示す。
表3は、様々なH.ピロリ株における、オエノテインC、クラリスロマイシン、アモキシシリン及びメトロニダゾールのMIC及びMBC値を示す。
分子オエノテインCは、インド亜大陸では豊富に入手できる植物ウッドフォーディア・フルクティコサの花から単離した。ウッドフォーディア・フルクティコサの乾燥花を1:1メタノール-水に室温で終夜浸漬することによって抽出した。この方法を3回繰り返した。併せた抽出物をロータリーエバポレーターで45℃で濃縮して、粗抽出物を得た。これをn-ブタノール及び水で分配した。層を45℃で別々に濃縮して、2つの分画を得た。n-ブタノール溶解分画をバイオアッセイによる分画手法の後にダイアイオンHP-20及びセファデックスLH-20カラムで繰り返してクロマトグラフィーに付し、オフ-ホワイト固体、本質的にアモルファスとして、純粋なオエノテインCを得た。それは、メタノール、アセトン及びDMSOに溶解性である。
植物ウッドフォーディア・フルクティコサ由来の化合物オエノテインC及び没食子酸メチルの単離:
分子オエノテインC及び没食子酸メチルは、植物ウッドフォーディア・フルクティコサの花から単離されている。ウッドフォーディア・フルクティコサの乾燥花を1:1メタノール-水で室温で終夜浸漬することによって抽出した。この方法を3回繰り返した。併せた抽出物を45℃でロータリーエバポレーターで濃縮して、粗抽出物を得た。これをn-ブタノール及び水で分配した。層を45℃で別々に濃縮して、2つの分画を得た。n-ブタノール溶解分画をバイオアッセイによる分画手法の後にダイアイオンHP-20及びセファデックスLH-20カラムで繰り返してクロマトグラフィーに付し、オフ-ホワイト固体、本質的にアモルファスとして、純粋なオエノテインCを得た(収率0.008%)。それは、メタノール、アセトン及びDMSOに溶解性である。没食子酸メチルの収率は0.003%であった。
化合物オエノテインCの抗-プロトンポンプ活性:
先端及び管状小胞状の膜が豊富に存在するブタ胃膜を [59] に従って調製した。かかる膜は、オメプラゾールによって特異的に遮断され得るK+-刺激H+-輸送ATPアーゼ活性を示す [60]。
化合物オエンテインCの抗-ヘリコバクター・ピロリ活性:
ディスク拡散感度アッセイを用いて、及びマイクロブロス希釈アッセイによるMIC/MBCの測定によって、抗-ヘリコバクター・ピロリ活性についてのオエノテインCの効果を試験した。6種のH.ピロリ株、その内の2つは、臨床株 [80A(無毒性)及び121A(毒性)]、4つは、標準株 [ATCC 43504、ATCC 49503、NCTC 26695及びATCC 43629]、を好適な条件(10% CO2、5% O2、85% N2及び95%相対湿度)下で37℃のインキュベーター中で維持した。分子オエノテインCをDMSOに溶解した。
化合物オエノテインCの毒性評価:
スイスアルビノマウスの死亡について化合物オエノテインCを試験した。化合物オエノテインCの250 mg/Kg体重の最大投薬量を経口経路によって5匹のスイスアルビノマウスに投与した。24時間後、該マウスのいずれにおいても死亡は観察されなかった。更に、マウスを15日間観察を続け、その期間、マウスは健康を維持し続け、何の行動異常も認められなかった。
1. 化合物オエノテインCによる胃プロトンポンプの阻害は、標準薬であるオメプラゾールよりも非常に強い(約20倍)。
2. H.ピロリの臨床的及び様々な標準株に対する同一の分子オエノテインCの非常低いMIC値(6.25〜25.0 μg/mL)も本発明において提供されている。
3. 好気細菌に対する分子オエノテインCの特異的な抗H.ピロリ活性は、その高いMIC値(>400 μg/mL)から明らかであり、有用な治療剤としてのその能力を示唆している。
4. 酸HCl及び微生物H.ピロリは、胃十二指腸潰瘍の病因の2つの主な理由であるので、抗-胃潰瘍及び十二指腸潰瘍薬の単一分子としてのオエノテインCの位置は特有である。これは、潰瘍の再発及び抗生物質耐性の点からの、三重療法及び四重療法(クラリスロマイシン、アモキシシリン、プロトンポンプ阻害剤、H2受容体遮断薬、スクラルフェート−診断及び他の基準によって、任意の3つ又は4つ)を用いた後での現在の医療管理の失敗によるものである。
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Claims (12)
- 消化性潰瘍疾患の治療のための医薬組成物を製造するための、化合物オエノテイン(oenothein)Cの治療上有効量、場合により1以上の薬学的に許容される担体、添加物、滑剤及び希釈剤の使用であって、前記組成物の投薬量が、化合物オエノテインC基準で、0.005 mg/Kg体重/日〜0.5 mg/Kg体重/日である、使用。
- 前記組成物の投薬量が、化合物オエノテインC基準で、少なくとも0.05 mg/Kg体重/日である、請求項1記載の使用。
- 前記組成物が、胃潰瘍、十二指腸潰瘍、胃炎、及び胃食道逆流疾患(GERD)を含む群より選ばれる消化性潰瘍疾患の治療において有用である、請求項1記載の使用。
- 前記化合物オエノテインCが、抗胃プロトンポンプ及びヘリコバクター・ピロリ(Helicobacter pylori)活性の点から二重機能を有する、請求項1記載の使用。
- 前記化合物オエノテインCが、0.13〜1.3 μMの範囲の濃度でin vitroで胃プロトンポンプ活性を阻害し、そのIC50値が0.6〜0.8 μMである、請求項1記載の使用。
- 前記化合物オエノテインCが、ヘリコバクター・ピロリの臨床株及び標準株に対して、静菌活性及び殺菌活性を示す、請求項1記載の使用。
- 前記化合物オエノテインCが、6.25 μg/mL〜25.0 μg/mLの範囲の最小阻止濃度(MIC)で、ヘリコバクター・ピロリに対して静菌活性を示す、請求項1記載の使用。
- 前記化合物オエノテインCが、25.0 μg/mL〜50.0 μg/mLの範囲の最小阻止濃度(MIC)で、ヘリコバクター・ピロリに対して殺菌活性を示す、請求項1記載の使用。
- 前記組成物が、タンパク質、炭水化物、糖類、ステアリン酸マグネシウム、セルロース、炭酸カルシウム、デンプン-ゼラチンペースト、及び薬学的に許容される担体、賦形剤、希釈剤又は溶媒からなる群より選ばれる担体を有する、請求項1記載の使用。
- 前記組成物が、前記化合物オエノテインCが、植物ウッドフォーディア・フルクティコサ(Woodfordia fructicos)の生物活性分画から得られる、請求項1記載の使用。
- 前記組成物のための投与経路が、経口的、筋肉内及び静脈内投与を含む群より選ばれる、請求項1記載の使用。
- 前記組成物が、粉剤、注射剤、シロップ剤、カプセル剤及び錠剤を含む群より選ばれる形態で使用される、請求項1記載の使用。
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