JP5305666B2 - 脈波伝播速度降下剤およびその用途 - Google Patents
脈波伝播速度降下剤およびその用途 Download PDFInfo
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- JP5305666B2 JP5305666B2 JP2008007435A JP2008007435A JP5305666B2 JP 5305666 B2 JP5305666 B2 JP 5305666B2 JP 2008007435 A JP2008007435 A JP 2008007435A JP 2008007435 A JP2008007435 A JP 2008007435A JP 5305666 B2 JP5305666 B2 JP 5305666B2
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- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
Description
以下の製造方法により、酒粕から、前述のジペプチドを含有するペプチド画分を調製した。まず、酒粕60g(固形分58.4%)を10分間沸騰させた後、12000rpm、15分間の条件下で遠心分離した。得られた沈殿物42gを180mlの水に分散させ、この分散液にプロテアーゼNアマノ(商品名、天野エンザイム株式会社製)210mgを添加して、50℃で6時間処理した。続いて、前記分散液に、さらにスミチームAP(商品名、新日本化学工業株式会社製)250mgを添加して、60℃で16時間処理した。得られた酵素処理液を、12000rpm、15分間の条件下で遠心分離し、得られた上清を、孔径0.45μmおよび0.22μmのメンブレンフィルター(東洋濾紙株式会社製)を用いてろ過した。ろ液を凍結乾燥し、得られた粉末をペプチド画分とした。
(1)ペプチド標準液の調製
各種ペプチド(Val−Tyr;シグマ社製、Val−Trp、Tyr−Trp、Ile−Tyr;国産化学社製)をそれぞれ10mg量り取り、水または塩酸水溶液を加え完全に溶解させ、1mLに定容した。各種ジペプチドを含有する4種類の溶液を、ペプチド標準溶液とした。
(2)内部標準液(IS)の調製
N−carbamyl−L−Arg(シグマ社製)10mgを量り取り、0.06N塩酸水溶液1mLで完全に溶解させ、内部標準液とした。
(3)標準液の調製
前記各種ペプチド標準液と前記内部標準液とを、各種ジペプチドがそれぞれ0.01mg/ml、前記内部標準物質が0.1mg/mlとなるように混合した。この4種類の混合液を標準液とした。
(4)ピーク面積の測定
前記4種類の標準液について、それぞれ下記条件でLC/MS分析を行い、各ジペプチドのMSピーク面積を測定した。
装置:Waters Alliance 2695-2996-ZQ4000
(LC-フォトダイオードアレイ検出器-MS検出器、Waters社製)
カラム:Imtakt UK-C18 75×4.6mm(Imtakt社製)
移動相:A液:0.05% HCOOH/水
B液:アセトニトリル(0−25%/0−7.5分、100%/7.5−8.5分)
注入量:10μL
流速:1mL/分
カラム温度:35℃
検出条件:UV190−300nm
MS エレクトロスプレーイオン(ESI)法 positive SIRモード
得られた前記ペプチド画分10mgを純水1mLに溶解し、ペプチド画分液を調製した。前記ペプチド画分液と前記内部標準液とを、ペプチド画分粉末が0.002g/ml、内部標準物質が0.1mg/mLとなるように混合して、試料液を調製した。この試料液について、前記標準液と同様にしてLC/MS分析を行い、各ジペプチドのMSピーク面積を測定した。そして、得られた各ジペプチドのMSピーク面積より、下記式にしたがって、前記ペプチド画分における各ジペプチドの含有量を算出した。
ペプチド画分のジペプチド含有量(mg/g)=A×{(B/C)/(D/E)}/F
A:標準液のジペプチド濃度(mg/ml)
B:試料液のジペプチドピーク面積
C:試料液のISピーク面積
D:標準液のジペプチドピーク面積
E:標準液のISピーク面積
F:試料液のペプチド画分濃度(g/ml)
前記ペプチド画分を含有するカプセル状のPWV降下剤を調製して、被検者に経口投与し、経時的なPWVの変移を確認した。なお、試験は、プラセボを用いた一重盲検査比較試験とした。
Claims (5)
- 脈波伝播速度の降下剤であって、
ジペプチドとして、Val−Tyr、Val−Trp、Tyr−TrpおよびIle−Tyrのジペプチドを含むことを特徴とする脈波伝播速度降下剤。 - 米タンパク質または米原料醸造物由来タンパク質をタンパク質分解酵素で処理した処理物を含み、前記処理物が前記ジペプチドを含む、請求項1記載の脈波伝播速度降下剤。
- 前記米原料醸造物が酒粕である、請求項2記載の脈波伝播速度降下剤。
- 動脈硬化を治療するための動脈硬化治療剤であって、
請求項1から3のいずれか一項に記載の脈波伝播速度降下剤を含むことを特徴とする動脈硬化治療剤。 - 動脈硬化を予防するための動脈硬化予防剤であって、
請求項1から3のいずれか一項に記載の脈波伝播速度降下剤を含むことを特徴とする動脈硬化予防剤。
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JP5305666B2 true JP5305666B2 (ja) | 2013-10-02 |
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JP3414761B2 (ja) * | 1991-03-06 | 2003-06-09 | 月桂冠株式会社 | 経口摂取物 |
JP2007314568A (ja) * | 2001-08-24 | 2007-12-06 | Teijin Ltd | チオベンズイミダゾール誘導体 |
CN101262866A (zh) * | 2005-09-14 | 2008-09-10 | 味之素株式会社 | 血流动力学改善剂 |
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