JP4631069B2 - β−アミロイド毒性緩和剤。 - Google Patents
β−アミロイド毒性緩和剤。 Download PDFInfo
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- JP4631069B2 JP4631069B2 JP2004080409A JP2004080409A JP4631069B2 JP 4631069 B2 JP4631069 B2 JP 4631069B2 JP 2004080409 A JP2004080409 A JP 2004080409A JP 2004080409 A JP2004080409 A JP 2004080409A JP 4631069 B2 JP4631069 B2 JP 4631069B2
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Description
アクトミオシンは、上記した非特許文献2の方法により、豚骨格筋肉をミンチしてバッファー(0.6M−KCl/0.04M−NaHCO3/0.01M−Na2CO3水溶液)に懸濁後、遠心分離を繰り返し、透析チューブにて透析した後に凍結乾燥して得た。
細胞培養フラスコ〔グライナー(Greiner)社製品〕を用い、ダルベッコ改変イーグル培地〔シグマ(Sigma)社製品〕に、5%(v/v)ウシ胎児血清〔インビトロゲン(Invitrogen)社製品〕、10%(v/v)ウマ血清〔インビトロゲン(Invitrogen)社製品〕を添加し、ラット副腎褐色細胞腫由来PC12細胞〔独立行政法人理化学研究所バイオリソースセンター、セル番号:RCB0009、セル名称:PC12〕を1×105/mL撒種し、37℃、5%CO2インキュベーターで培養した。
細胞生存能力の測定には、生細胞中のミトコンドリア脱水酵素のテトラゾリウム塩(WST−1)還元作用を指標とする方法が広く用いられており、本実施例ではこの方法に依って、PC12細胞のWST−1還元能力を指標とした。βAは、βA25〜35〔アメリカンペプタイド社(American Peptide Company)製品〕を用い蒸留水に溶解して使用した。
PC12細胞に対するβA25〜35毒性緩和作用は、ヘオらの方法〔ヘオ(Heo,H.J.)他8名著、モレキュラ セル(Molecular Cell)、10卷、253−262頁、2000年〕に基いて、一部を変えた方法により測定した。0.5%(v/v)ウシ胎児血清および1%(v/v)ウマ血清添加ダルベッコ改変イーグル培地を用いて、96穴プレート〔ベクトンディッキンソン(Becton Dickinson)社製品〕に上記の細胞溶液80μLを入れ、PC12細胞を1×104/穴になるように播種し、5%CO2インキュベーター中で培養した。培養22時間後に各穴に豚骨格筋アクトミオシン分解混合物10μLを加え、続いてその2時間後にβA25〜35の400μM水溶液を10μl(βA25〜35の最終濃度:40μM)を添加し、37℃、5%CO2インキュベーター中で48時間培養した。次いで、各穴にミトコンドリア脱水素酵素の基質であるテトラゾリウム塩〔タカラバイオ(株)製、「プレミックス(Premix)WST−1」(商品名)〕10μLを加えて、37℃で4時間反応させた。各穴の反応液について、マイクロプレートリーダー〔バイオラッド(Bio−Rad)社製、「モデル−550」(製品名)〕を用い、波長415nm(対象波長;655nm)での吸光度を測定した。尚、コントロールとしてβA25〜35を含まない蒸留水を添加した。
豚骨格筋アクトミオシン分解混合液物を限外ろ過して、分子量10,000以下と10,000より大きい部分に分画し、βA25〜35の最終濃度を20μMとした以外実施例と同様にしてβA25〜35のPC12細胞死滅作用を評価した。結果を図2に示す。
分子量10,000以下の成分は、10,000より大きい成分よりPC12細胞生存率が高く、βA25〜35のPC12細胞死滅作用が大きく緩和されていることを示している。
Claims (3)
- アクトミオシンを、パパイン及びフィチンから選ばれたプロテアーゼの存在下において酵素分解し、その酵素分解物から分子量10,000以下を分画して得られたアクトミオシン分解物を活性成分として含むことを特徴とするβ−アミロイド毒性緩和剤。
- 前記アクトミオシンは、動物の筋肉からの抽出物であることを特徴とする請求項1に記載のβ−アミロイド毒性緩和剤。
- 前記動物の筋肉は、豚骨格筋肉であることを特徴とする請求項2に記載のβ−アミロイド毒性緩和剤。
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JP2004080409A JP4631069B2 (ja) | 2004-03-19 | 2004-03-19 | β−アミロイド毒性緩和剤。 |
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JP2005263723A JP2005263723A (ja) | 2005-09-29 |
JP4631069B2 true JP4631069B2 (ja) | 2011-02-16 |
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JP7131407B2 (ja) | 2019-01-24 | 2022-09-06 | 日本製鉄株式会社 | 漏れインダクタンス調整トランス |
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JP4828890B2 (ja) * | 2005-08-12 | 2011-11-30 | プリマハム株式会社 | 食肉タンパク質由来の抗疲労ペプチド |
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JP7131407B2 (ja) | 2019-01-24 | 2022-09-06 | 日本製鉄株式会社 | 漏れインダクタンス調整トランス |
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