JP6027722B2 - 脳梗塞の予防及び治療用医薬品の製造におけるl−ブチルフタリドの使用 - Google Patents
脳梗塞の予防及び治療用医薬品の製造におけるl−ブチルフタリドの使用 Download PDFInfo
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- JP6027722B2 JP6027722B2 JP2011049876A JP2011049876A JP6027722B2 JP 6027722 B2 JP6027722 B2 JP 6027722B2 JP 2011049876 A JP2011049876 A JP 2011049876A JP 2011049876 A JP2011049876 A JP 2011049876A JP 6027722 B2 JP6027722 B2 JP 6027722B2
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- butylphthalide
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- cerebral
- ischemia
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- 235000020357 syrup Nutrition 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 238000011287 therapeutic dose Methods 0.000 description 1
- 229960000103 thrombolytic agent Drugs 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
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- C07D307/87—Benzo [c] furans; Hydrogenated benzo [c] furans
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- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
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Description
dl−NBP:ラセミ型ブチルフタリド
d−NBP:右旋性ブチルフタリド
l−NBP:左旋性n−ブチルフタリド
tMCAO:一過性局所脳虚血モデル
tMCAOラットの脳梗塞体積に対する光学ブチルフタリドの効果
実験材料及び方法
試薬及び薬剤
l−NBP、d−NBP及びdl−NBPはいずれも当研究所の合成製薬化学部門より入手。これらの光学純度及び化学的純度は共に>99%であり、旋光性はそれぞれ−66.49°、+66.88°及び0°である。これらを植物油と配合した。MK801はシグマ社製であり、生理的ブラインと配合した。塩化トリフェニルテトラゾリウム(TTC)(Beijing Chemical Plant社製造)を蒸留水を配合して4%溶液として使用した。
体重280g〜320gのオスWister系ラットを使用し、1つのケージにラット5匹の割合で飼育した。室温を23℃に制御し、ラットには食物及び水を自由に摂取させた。ラットをペントバルビタールナトリウム40mg/kgで麻酔した。手術用顕微鏡下、正中頸部皮膚切開により右総頸動脈を露出させた後、内頸動脈(ICA)及び外頸動脈(ECA)を周囲の神経及び筋膜から分離し、吻合分岐を結紮した。ECAを結紮して切断し、引っ張ってまっすぐにしてICAと一直線とした。先端が丸く直径0.28mmのナイロン縫合糸(ポリ−L−リシンで被覆)をECAからICAの内腔に約20mmにわたって頭蓋内を中大脳動脈の開始点の方向に導入した。2時間虚血させた後、ナイロン縫合糸を慎重に引き抜き、ECAを開口部位で結紮した。その後、ラットを縫合してケージに戻し、24時間再灌流した。手術中、室温を24℃〜25℃で維持した。ラットを37℃の加熱プレート上に置き、手術中体温を維持した。虚血して15分後に投与した。
ラットを各群10匹ずつの8群に分けた。第一群は植物油1ml/kgのビヒクルコントロール;第二群及び第三群はdl−NBP 40mg/kg及び80mg/kg;第四群及び第五群はd−NBP 20mg/kg及び40mg/kg;第六群及び第七群はl−NBP 20mg/kg及び40mg/kg;第八群はMK801 0.1mg/kg。第一群〜第七群のラットには経口投与し、第八群のラットには腹腔内投与した。
虚血して24時間後に神経学的行動を観察した。ラットを尾を持って地面から1インチ持ち上げ、両前肢の状態を観察した。両肩を押して、左右の抵抗性に差異があるかを観察した。ラットを地面に下ろして歩行状態を観察した。下記基準に従ってスコアをつけた。
0:強い前肢、地面に向かって対称的に伸びる;両肩の抵抗性は同一、及び、正常な歩行。
1:対側性の肩の屈曲、前肢の屈曲;両肩の抵抗性は同一、及び、正常な歩行。
2:対側性の肩の屈曲、前肢の屈曲;押しに対する肩の抵抗性の対側性の低下、及び、正常な歩行。
3:対側性の肩の屈曲、前肢の屈曲;押しに対する肩の抵抗性の対側性の低下、及び、歩行時に旋回。
4:対側性の肩の屈曲、前肢の屈曲;自律的に動くことができない。
スコアが大きいほど、ラットの行動障害は重篤である。
手術して24時間後にラットをペントバルビタールナトリウム100mg/kgで麻酔し、断頭した。その後、脳を迅速に取り出し、冠状縫合に沿って切片6つに切断し(第一〜第五の切片は厚さ2mm、第六の切片は厚さ4mm)、その後迅速に、14%TTC1.5ml及び1M K2HPO4 0.1mlを含む溶液5ml中に入れて遮光した。37℃で30分間インキュベートし、その間、7〜8分毎に上下を反転させた。TTCにより染色後、正常な脳組織は赤色、梗塞組織は白色となり、境界が明確であった。インキュベート後、脳切片の各群を順に並べ、保存用にデジタルカメラで撮影した。それぞれの切片をコンピューター画像分析装置システム(SPOT 3.5 ソフトウエア)で調べ、梗塞面積の積分により梗塞体積を計算した。脳浮腫の影響を避けるため、梗塞体積を脳半球の百分率で表した。計算式は次の通りである:脳梗塞体積(%)=(非手術半球の体積−手術半球の非梗塞部分の体積)/(非手術半球の体積)。
結果を平均±標準誤差で表した。一元配置ANOVAにより神経学的行動スコア及び脳梗塞体積を統計学的に分析し、また、posthoc LSD検定により群間の差を分析した。p<0.05の場合に結果は有意差を示すと考えた。
tMCAOラットの脳梗塞体積に対する光学ブチルフタリドの効果
一元配置ANOVA分析により各群間に有意差があったことから、l−NBP群(20mg/kg及び40mg/kgの両方)において梗塞体積が非常に顕著かつ用量依存的に減少していることが示される。l−NBP 40mg/kgの群における減少効果が最も良く、梗塞体積が上限80.4%減少した(p<0.001、対ビヒクル群)。この群における治療効果はMK801群の治療効果(梗塞体積減少81.8%下;p<0.001)と類似しており、その一方で、d−NBP群及びdl−NBP群には著しい効果が認められなかった(図1及び図2参照)。上記結果は、l−NBPの梗塞体積減少効果がd−NBPよりも良好であることを示している。dl−NBP群(80mg/kg)及びd−NBP群(40mg/kg)における梗塞体積はビヒクルコントロールよりも低かったが、その間には統計学的な差はなかったことから、dl−NBP中のd−NBPがl−NBPの効果を相殺しているであろうことが示唆される。
ビヒクルコントロール群の大部分のラットの神経学的スコアは2であり、対側性の前肢屈曲という症状が現れ、側方からの押しに対する抵抗性が低下していた。より少ないラットにおいては対側性の旋回運動が生じ、これらをスコア3と評価した。対側性の前肢屈曲のみを発症したラットは更により少なく、これを1と評価し、また、症状が重篤かつ自律運動不可能なものは4と評価した。神経学的スコアの平均は2.6±0.3であった。虚血後15分におけるl−BNP 20mg/kg又は40mg/kgの経口投与により神経学的症状が改善されることが示され(1.4(p<0.01)及び1.1(p<0.001))、MK801の効力が最も顕著であり(0.8、p<0.001)、一方、d−BNP群及びdl−BNP群では著しい改善が認められなかった。MK801治療群のラットについては、脳虚血により誘導される症状は著しく軽減されたが、四肢が弱くて伸ばすとよろめき、運動失調があり、更に一方向に旋回した。この行動評価から、薬剤の行動改善程度は薬剤の梗塞体積低減効果に対応することが示唆される(図3参照)。
本発明者らが以前に使用したモデルは永続的な局所虚血(中大脳動脈の焼灼による)であり、一方、この実験では一過性の局所脳虚血モデル(虚血2時間+再灌流24時間)を使用している。後者は脳梗塞体積が前者よりも大きい。dl−MBP用量は前回の用量と同じにしたが、dl−NBPは、使用した用量(40mg/kg及び80mg/kg)では脳梗塞体積減少効果を有さない。この結果の差はこの二種のモデルの差に起因する。
Claims (5)
- 虚血の15分後に経口投与される
2時間の虚血により誘導される脳梗塞の予防用又は治療用医薬品の製造における式(I)のL−ブチルフタリドの使用。
- 前記脳梗塞は局所脳虚血により誘導される
ことを特徴とする請求項1に記載の使用。 - 前記化合物の治療上有効量は0.1〜100mg/kg/日である
ことを特徴とする請求項1に記載の使用。 - 治療上有効量の式(I)のL−ブチルフタリド及び医薬品に許容される担体を含み、
2時間の虚血の15分後に経口投与される
ことを特徴とする脳梗塞の予防用又は治療用医薬組成物。
- 錠剤、カプセル、ピル、持続放出調製物、及び、制御放出調製物からなる群から選択される形態である
ことを特徴とする請求項4に記載の医薬組成物。
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CN1182127C (zh) * | 2000-06-28 | 2004-12-29 | 中国医学科学院药物研究所 | 新的取代的2-苯并[c]呋喃酮化合物,其制备方法以及包含它们的药物组合物 |
US6852687B2 (en) * | 2001-04-26 | 2005-02-08 | Kazuo Tsubota | Method for inhibiting apoptosis |
CN1166693C (zh) * | 2001-06-18 | 2004-09-15 | 中奇制药技术(石家庄)有限公司 | 丁苯酞环糊精或环糊精衍生物包合物及其制备方法和用途 |
US6447814B1 (en) * | 2001-08-28 | 2002-09-10 | Yung Shin Pharma Ind. Co. Ltd. | Chinese herbal composition for improving blood circulation and the method of preparing the same |
US7202211B2 (en) * | 2002-02-21 | 2007-04-10 | Astellas Pharma Inc. | Methods of preventing or treating brain ischemia or brain injury |
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WO2004018444A1 (fr) * | 2002-08-21 | 2004-03-04 | Shijiazhuang Pharma Group Zhongqi Pharmaceutical Technology (Shijiazhuang) Co., Ltd. | Clathrates de phtalide butylique associe a de la cyclodextrine ou a ses derives, procede de preparation desdites compositions et leur utilisation |
US20070082947A1 (en) * | 2003-05-14 | 2007-04-12 | D Orazio Daniel | Use of phthalide derivatives for the treatment and prevention of diabetes mellitus |
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CN1605336A (zh) | 2003-10-10 | 2005-04-13 | 中国医学科学院药物研究所 | 左旋丁基苯酞在制备预防和治疗脑梗塞的药物中的应用 |
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US7482027B2 (en) * | 2005-04-30 | 2009-01-27 | Angiolab, Inc. | Composition for the prevention or treatment of diseases associated with angiogenesis |
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2003
- 2003-10-10 CN CNA2003101002222A patent/CN1605336A/zh active Pending
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2004
- 2004-09-29 JP JP2006529562A patent/JP2007507436A/ja active Pending
- 2004-09-29 EP EP20130187375 patent/EP2689776A1/en not_active Withdrawn
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- 2004-09-29 CA CA2902337A patent/CA2902337A1/en not_active Abandoned
- 2004-09-29 WO PCT/CN2004/001123 patent/WO2005034936A1/zh active Application Filing
- 2004-09-29 CN CN2010105412743A patent/CN102008464B/zh not_active Expired - Lifetime
- 2004-09-29 US US10/574,917 patent/US20070112065A1/en not_active Abandoned
- 2004-09-29 CN CNA2004800294090A patent/CN1863523A/zh active Pending
- 2004-09-29 CA CA3028912A patent/CA3028912A1/en not_active Abandoned
- 2004-09-29 RU RU2006115784/15A patent/RU2336870C2/ru active
- 2004-09-29 EP EP04762256A patent/EP1679070A4/en not_active Withdrawn
- 2004-09-29 CA CA002549931A patent/CA2549931A1/en not_active Abandoned
- 2004-09-29 KR KR1020067006909A patent/KR100860703B1/ko active IP Right Grant
- 2004-09-29 EP EP15181920.8A patent/EP2974722A1/en not_active Ceased
- 2004-09-29 BR BRPI0415123-2A patent/BRPI0415123A/pt not_active Application Discontinuation
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Also Published As
Publication number | Publication date |
---|---|
RU2006115784A (ru) | 2007-11-27 |
WO2005034936A1 (fr) | 2005-04-21 |
KR20060085915A (ko) | 2006-07-28 |
CN1605336A (zh) | 2005-04-13 |
CA2549931A1 (en) | 2005-04-21 |
BRPI0415123A (pt) | 2006-11-28 |
US20110082201A1 (en) | 2011-04-07 |
RU2336870C2 (ru) | 2008-10-27 |
EP2974722A1 (en) | 2016-01-20 |
AU2004279655A1 (en) | 2005-04-21 |
US20070112065A1 (en) | 2007-05-17 |
CA3028912A1 (en) | 2005-04-21 |
CN1863523A (zh) | 2006-11-15 |
EP1679070A1 (en) | 2006-07-12 |
US8598225B2 (en) | 2013-12-03 |
KR100860703B1 (ko) | 2008-09-26 |
CN102008464A (zh) | 2011-04-13 |
EP2689776A1 (en) | 2014-01-29 |
JP2011116781A (ja) | 2011-06-16 |
CA2902337A1 (en) | 2005-04-21 |
CN102008464B (zh) | 2012-08-29 |
AU2004279655B2 (en) | 2008-09-25 |
JP2014205724A (ja) | 2014-10-30 |
EP1679070A4 (en) | 2010-02-17 |
JP2007507436A (ja) | 2007-03-29 |
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