JP2013063958A - 統合失調症治療薬 - Google Patents
統合失調症治療薬 Download PDFInfo
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Abstract
【解決手段】この発明に係る統合失調症治療薬は、チぺピジンなどのGIRKチャンネル活性化電流抑制作用を有する化合物(GIRKチャンネル活性化電流抑制化合物)を、有効成分として含有する、統合失調症の陽性症状および/または陰性症状にも有効で、かつ、副作用が少ない薬剤である。
【選択図】なし
Description
所定量(10、20、40mg/kg)のチペピジンを、実験動物(ddY雄マウス)に実験の10分前に腹腔内投与した。その後、MK−801(0.25mg/kg)を腹腔内投与した直後に、マウスをオープンフィールドに入れて、ビデオトラッキングシステムにより90分間歩行距離を測定した。図1はマウスが90分間歩行した全歩行距離を示しており、図3は30分ごとの歩行距離を示している。なお、コントロールとして生理食塩水を用いて同様に調べた。
実施例1と同様にして、治療抵抗性統合失調症治療薬であり、非定型型抗神経病薬であるクロザピン(clozapine)(3mg/kg)をマウスの腹腔内に投与した後、MK−801(0.25mg/kg)を腹腔内投与した直後に、マウスをオープンフィールドに入れて、ビデオトラッキングシステムにより90分間歩行距離を測定した。図2はマウスが90分間歩行した全歩行距離を示しており、図4は30分ごとの歩行距離を示している。
実施例1と同様にして、チペピジン10mg/kgと、クロザピン1mg/kgを実験動物(ddY雄マウス)に腹腔内投与した。その後、MK−801(0.25mg/kg)を腹腔内投与した直後にオープンフィールドに入れ、ビデオトラッキングシステムにより、90分間歩行距離を測定し、90分間歩行した全歩行距離を記録して、MK−801誘発行動過多を抑制しているかどうかを調べた。その結果、チペピジンとクロザピンとを併用した場合も、MK−801誘発行動過多を抑制することが確認できた。結果を図5に示す。
実験動物(ddY雄マウス)にMK−801(0.3mg/kg)を1日1回、15日間腹腔内投与し、2日間の休薬期間を置いた後、実験を行った。
実験は、所定量(10、20、40mg/kg)のチペピジンを、上記実験動物に実験の30分前に腹腔内投与し、6分間強制水泳をさせた。6分間の強制水泳時間のうち、最初の2分間を馴化時間とし、残りの4分間における行動を観察した。マウスが水面上に頭だけ出して手足を動かすことなく浮いている状態を無動とみなし、この持続時間(immobility time)を目視にてストップウオッチで測定した。なお、測定のバイアスを避けるために、実験はブラインド下で行った。その結果を図6に示す。
実施例3と同様にして、クロザピン(clozapine)(3mg/kg)をマウスの腹腔内に投与してMK−801による誘発無動時間延長について調べた。その結果を図7に示す。
実施例3と同様にして、実験動物(ddY雄マウス)にMK-801 (0.3 mg/kg) を1日1回、15日間腹腔内投与し、2日間の休薬期間後、ddY雄マウスにチペピジン10mg/kgと、クロザピン1mg/kgを試験の30分前に腹腔内投与した。その後、6分間の強制水泳を行った。この強制水泳時間のうち、最初の2分間を馴化時間とし、残りの4分間における行動を観察した。マウスが水面上に頭だけ出して手足を動かすことなく浮いている状態を無動とみなし、この持続時間(immobility time)を目視にてストップウォッチで測定した。なお、測定のバイアスを避けるために、実験はブラインド下で行った。その結果を図8に示す。
実験動物(ddY雄マウス)を使用して、馴化(habituation)セッション、訓練(training)セッション、および保持(retention)セッションからなる新奇物体認識試験による認知障害実験を行った。
本試験は、まず、何もないオープンフィールド内にマウスを5分間探索させ(馴化セッション)、その30分後、オープンフィールド内に左右対称の位置に同じ物体を設置し、5分間探索させた(訓練セッション)。さらに、その1時間後、訓練セッションに使用した物体のうちの1つを新しい物体に変え、5分間探索させた(保持セッション)。この保持セッション中のマウスの行動をビデオで記録し、マウスがそれぞれの物体を探索した時間をストップウォッチで測定し、以下の式によりdiscrimination of index(DI)値を算出した。
DI= 新奇物体を探索した時間(秒)/両物体を探索した時間(秒) ×100
実施例5と同様にして、実験動物(ddY雄マウス)を使用して、上記と同じ新奇物体認識試験による認知障害実験を行った。チペピジン (5 mg/kg)、クロザピン (0.5 mg/kg)およびMK-810(0.2 mg/kg)は、保持セッションの30分前に腹腔内投与した。また、実験は、測定のバイアスを避けるためにブラインド下で行った。なお、実験結果は、図10に示す。
Claims (6)
- G−タンパク質共役型内向き整流性K+(GIRK)チャンネルの活性化電流を抑制する作用を有する化合物(GIRKチャンネル活性化電流抑制化合物)を有効成分として含有することを特徴とする統合失調症治療薬。
- 請求項1に記載の統合失調症治療薬であって、前記統合失調症治療薬が、クロザピン等の他の統合失調治療薬をさらに含有しているか、または併用することを特徴とする統合失調症治療薬。
- 請求項1または2に記載の統合失調症治療薬であって、統合失調症の陽性症状および/または陰性症状および/または認知障害に有効であることを特徴とする統合失調症治療薬。
- 請求項1〜3のいずれか1項に記載の統合失調症治療薬であって、前記GIRKチャンネル活性化電流抑制化合物が、クロペラスチン、塩酸クロペラスチン、フェンジゾ酸クロペラスチン、塩酸カラミフェン、エタンジスルフォン酸カラミフェン、塩酸エプラジノン、ヒベンズ酸チペピジン、クエン酸チペピジン、及びクエン酸イソアミニルからなる群から選ばれる少なくとも1種の化合物であることを特徴とする統合失調症治療薬。
- GIRKチャンネル活性化電流抑制化合物を有効成分として含有する統合失調症治療を使用して統合失調症の予防または治療に適用することを特徴とする統合失調症治療薬の用途。
- 請求項5に記載の統合失調症治療薬の用途であって、統合失調症の陽性症状および/または陰性症状および/または認知障害に適用することを特徴とする統合失調症治療薬の用途。
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JP2017036242A (ja) * | 2015-08-11 | 2017-02-16 | 国立大学法人 熊本大学 | アルツハイマー治療薬 |
WO2017209106A1 (ja) * | 2016-05-30 | 2017-12-07 | 大正製薬株式会社 | チペピジンの経口用製剤 |
WO2020095979A1 (ja) * | 2018-11-08 | 2020-05-14 | 大日本住友製薬株式会社 | チペピジンを含む中枢性疾患の治療剤 |
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JP2017036242A (ja) * | 2015-08-11 | 2017-02-16 | 国立大学法人 熊本大学 | アルツハイマー治療薬 |
WO2017209106A1 (ja) * | 2016-05-30 | 2017-12-07 | 大正製薬株式会社 | チペピジンの経口用製剤 |
WO2020095979A1 (ja) * | 2018-11-08 | 2020-05-14 | 大日本住友製薬株式会社 | チペピジンを含む中枢性疾患の治療剤 |
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