JP7345771B2 - 糖尿病によって誘発される知覚過敏または知覚異常の予防又は治療用組成物 - Google Patents
糖尿病によって誘発される知覚過敏または知覚異常の予防又は治療用組成物 Download PDFInfo
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- A61P25/02—Drugs for disorders of the nervous system for peripheral neuropathies
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Description
項1. 子実体が発生する前のシイタケ菌糸体を80℃の水で抽出した抽出物を含有することを特徴とする、糖尿病によって誘発される知覚過敏または知覚異常の予防又は治療用組成物。
項2. 医薬組成物である、項1に記載の糖尿病によって誘発される知覚過敏または知覚異常の予防又は治療用組成物。
項3. 加工食品である、項1に記載の糖尿病によって誘発される知覚過敏または知覚異常の予防又は治療用組成物。
項4. 項1~4のいずれかに記載の組成物を対象に投与することを含む、糖尿病によって誘発される知覚過敏または知覚異常を予防又は治療する方法(人を手術・治療・診断する方法を除く)。
項5. シイタケ菌糸体抽出物の1日あたりのヒトへの投与量が、乾燥粉末重量として、4mg/kg体重以上となるよう用いられることを特徴とする、項4に記載の方法。
シイタケ菌糸体の培養を行う培地は、バガス80重量部、脱脂米糠10重量部からなる固体培地に適度な純水を加えたものを用いた。この培地にシイタケ菌糸体を接種し、温度および湿度を管理した培養室内に放置し、菌糸体を増殖させた。
シイタケ菌糸体が蔓延した培地に8等量の純水を加えて粉砕し、80℃±3℃で2時間加熱を行い、液循環抽出をした後100メッシュろ過した。ろ過抽出物をBrix値が27%±2%となるように濃縮した。ヘリコイド式滅菌機を用いて135℃15秒で滅菌し、滅菌抽出物に滅菌水を加えてBrix値が25%±1%となるように調整した後、凍結乾燥を行った。この凍結乾燥粉末を粉砕後42メッシュ通過させ、シイタケ菌糸体の乾燥粉末を得た。
糖尿病によって誘発される、機械的刺激によるアルディニア(通常痛みを引き起こさない感覚刺激で惹起される激痛)等の知覚過敏および低温刺激における知覚異常に対するシイタケ菌糸体抽出物の予防効果を調べた。ストレプトゾトシン投与と同時にシイタケ菌糸体抽出物を被検物としてマウスに経口投与し、以下の試験(Cold plate testおよびvon Frey test)を行った。
6~7週齢のC57BL/6J雄性マウスを用い、コントロール群、ストレプトゾトシン投与群、ストレプトゾトシンおよび被検物投与群(ストレプトゾトシン+被検物投与群)の3群に群構成した。
コールドプレート試験を行い、低温刺激における知覚異常に対するシイタケ菌糸体抽出物の効果を試験した。上記(1)の3群のマウスを4℃に設定したコールドプレート上にのせ、回避までの反応時間(潜時)を測定した。潜時が短いほどコールドプレートによる低温刺激を、より忌避していると考えられる。結果を図1に示す。
ケージに、上記(1)の3群のマウスを入れ、強度0.16gのフィラメントを後肢裏に押し付けて回避反応の回数を測定した。ストレプトゾトシン投与群では、コントロール群に比べて著しく回避行動スコアが上昇し、ストレプトゾトシン+被検物投与群では、コントロール群と同程度の回避行動スコアを示した。ストレプトゾトシン+被検物投与群は、ストレプトゾトシン投与群と比較して有意に回避行動スコアの上昇を抑制した。結果を図2に示す。
糖尿病よって誘発される、機械的刺激によるアロディニア等の知覚過敏および低温刺激における知覚異常に対するシイタケ菌糸体抽出物の治療効果を調べた。ストレプトゾトシン投与後21日目からシイタケ菌糸体抽出物を被検物としてマウスに経口投与し、以下の試験(Cold plate testおよびvon Frey test)を行った。
6~7週齢のC57BL/6J雄性マウスを用い、コントロール群、ストレプトゾトシン投与群、ストレプトゾトシンおよび被検物投与群(ストレプトゾトシン+被検物投与群;被検物は21日目から投与開始)の3群に群構成した。
コールドプレート試験を行い、低温刺激における知覚異常に対するシイタケ菌糸体抽出物の効果を試験した。上記(1)の3群のマウスを4℃に設定したコールドプレート上にのせ、回避までの反応時間(潜時)を測定した。潜時が短いほどコールドプレートによる低温刺激を、より忌避していると考えられる。結果を図3に示す。
ケージに、上記(1)の3群のマウスを入れ、強度0.16gのフィラメントを後肢裏に押し付けて回避反応の回数を測定した。ストレプトゾトシン投与群では、コントロール群に比べて著しく回避行動スコアが上昇した。ストレプトゾトシン+被検物投与群では、被検物を投与しない間は、ストレプトゾトシン投与群同様に、回避スコアは上昇した。しかし、投与日以後は、回避行動スコアは減少し、コントロール群と同程度の回避行動スコアまで回復した。ストレプトゾトシン+被検物投与群は、ストレプトゾトシン投与群と比較して有意に回避行動スコアの上昇を抑制した。結果を図4に示す。
る。回避回数が多ければ、フィラメントによる刺激をより忌避していると考えられる。図4中の線種については、図3の場合と同じである。また、グラフ中の記号についても図3と同じものを用いた。
Claims (3)
- 子実体が発生する前のシイタケ菌糸体を80℃の水で抽出した抽出物を含有することを特徴とする、糖尿病によって誘発される知覚過敏または知覚異常の予防又は治療用組成物。
- 子実体が発生する前のシイタケ菌糸体を80℃の水で抽出した抽出物を含有することを特徴とする、糖尿病によって誘発される知覚過敏または知覚異常の予防又は治療用医薬組成物。
- 子実体が発生する前のシイタケ菌糸体を80℃の水で抽出した抽出物を含有することを特徴とする、糖尿病によって誘発される知覚過敏または知覚異常の予防又は治療用加工食品。
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JP2000159683A (ja) | 1998-11-27 | 2000-06-13 | Kobayashi Pharmaceut Co Ltd | 肝障害防御剤 |
JP2000159686A (ja) | 1998-11-27 | 2000-06-13 | Kobayashi Pharmaceut Co Ltd | シイタケ菌糸体抽出物由来のlak活性増強用製剤 |
JP2002087981A (ja) | 2000-07-11 | 2002-03-27 | Hitoshi Nagaoka | 糖質脂質代謝異常改善剤 |
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JP2002087981A (ja) | 2000-07-11 | 2002-03-27 | Hitoshi Nagaoka | 糖質脂質代謝異常改善剤 |
JP2003155249A (ja) | 2001-11-16 | 2003-05-27 | Kobayashi Pharmaceut Co Ltd | IgA産生促進剤 |
JP2005213211A (ja) | 2004-01-30 | 2005-08-11 | Noda Shokukin Kogyo Kk | 血糖値上昇抑制剤 |
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