JP3911366B2 - α-Glucosidase inhibitor - Google Patents

α-Glucosidase inhibitor Download PDF

Info

Publication number
JP3911366B2
JP3911366B2 JP18763499A JP18763499A JP3911366B2 JP 3911366 B2 JP3911366 B2 JP 3911366B2 JP 18763499 A JP18763499 A JP 18763499A JP 18763499 A JP18763499 A JP 18763499A JP 3911366 B2 JP3911366 B2 JP 3911366B2
Authority
JP
Japan
Prior art keywords
molecular weight
foods
weight
glucosidase
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP18763499A
Other languages
Japanese (ja)
Other versions
JP2001010965A (en
Inventor
裕之 藤田
信浩 福嶋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Supplement Inc
Original Assignee
Nippon Supplement Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Supplement Inc filed Critical Nippon Supplement Inc
Priority to JP18763499A priority Critical patent/JP3911366B2/en
Priority to EP99938534A priority patent/EP1025851B1/en
Priority to DE69903911T priority patent/DE69903911T2/en
Priority to PCT/JP1999/004466 priority patent/WO2000012109A1/en
Priority to CNB998014648A priority patent/CN1170550C/en
Priority to US09/530,063 priority patent/US6299911B1/en
Publication of JP2001010965A publication Critical patent/JP2001010965A/en
Application granted granted Critical
Publication of JP3911366B2 publication Critical patent/JP3911366B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Coloring Foods And Improving Nutritive Qualities (AREA)
  • Medicines Containing Plant Substances (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、医薬品、食品、健康食品、特定保健用食品などに使用することができるトウチを有効成分として含有してなるα−グルコシダーゼ阻害剤に関するものである。
【0002】
【従来の技術】
α−グルコシダーゼ阻害剤は、小腸の微絨毛に局在するα−グルコシダーゼを阻害し、食後の血糖値の急上昇及びそれに続くインスリン値の上昇を抑制することが、Diabate Medicine, 10, 688(1993)に報告され、人間及び人間以外の動物においても炭水化物(特に、澱粉由来のオリゴ糖、シュクロース等)の代謝を抑制するために、例えば血糖上昇抑制作用を示し、過血糖症状及び過血糖に由来する肥満症、糖尿病などの種々の疾患の改善に有用である。また、α−グルコシダーゼ阻害剤を添加して製造した食品は、代謝異常の患者食に適しており、さらに代謝異常予防食として健康な人にも適している。
【0003】
食品に由来するα−グルコシダーゼ阻害剤として、例えば、特開平9−65836号公報には、動物性蛋白質又は植物性蛋白質の酵素加水分解物が開示され、特開平5−17364号公報には茶ポリフェノールが開示されている。
【0004】
【発明が解決しようとする課題】
しかしながら、上記特開平9−65836号公報に記載のα−グルコシダ一ゼ阻害剤は、活性を示すためには食品として大量に摂取しなくてはならず、また、特開平5−17364号公報開示技術では、ポリフェノールの精製が煩雑であり、かつ通常摂取する茶ではやはり多量に摂取する必要があった。
本出願人は、先に特願平10−239326号で、中華料理の食材としても用いられているトウチ(豆鼓)が、強いα−グルコシダーゼ阻害活性を有するということを報告した。これは、従来公知のα−グルコシダーゼ阻害剤よりも阻害活性の点で効果が大きく、原料も入手しやすく、摂取も容易であったが、更なるα−グルコシダーゼ阻害活性の向上が課題である。
【0005】
【課題を解決するための手段】
上記課題を鋭意研究していたところ、トウチの水及び/又はアルコール抽出物であり、かつ分子量3000以上の成分を20重量%以下としたものが強い阻害活性を発現することを見いだし本発明を完成した。
【0006】
【発明の実施の形態】
本発明で用いられるトウチは通常蒸した大豆をこうじで発酵させたものであり、日本の大徳寺納豆、浜納豆、寺納豆、塩から納豆、一休寺納豆等の納豆も本発明のトウチに含まれる。
また、一般的に発酵させる際には塩漬けするが、塩漬けを省略して同様に製造したもの、発酵終了時に脱塩したものも本発明に用いることができる。
【0007】
本発明のα−グルコシダーゼ阻害剤は上記の如きトウチから水及び/又はアルコールで抽出されるものであり、かかる抽出に用いるアルコールとしてはメタノール、エタノール、プロパノール、ブタノール等が挙げられるがメタノール、エタノールが好ましい。抽出方法としては、撹拌抽出、浸漬抽出、超臨界抽出などの抽出方法が挙げられるが、通常は撹拌抽出あるいは浸漬抽出が用いられる。水とアルコールを併用する時は、水/アルコールの混合比(重量比)としては、1/10〜10/1が好ましく、更には、1/5〜5/1である。
【0008】
水で抽出する場合は、トウチをそのまま、あるいは粉砕し、これに1〜20倍量の水を加え、40〜60℃で12〜20時間撹拌抽出したり、100〜140℃で1〜3時間撹拌抽出する。
アルコール抽出あるいは水及びアルコール抽出する場合は、トウチをそのまま、あるいは粉砕し、これに1〜15倍重量のアルコール、あるいは水及びアルコールを加え40〜60℃で3〜10時間撹拌抽出したり、室温で10時間〜7日浸漬抽出して、更にアルコールを留去しておく。
上記抽出方法により得られた水及び/又はアルコール抽出物中には、通常後述する分子量3000以上の成分が30〜90重量%含有される。
【0009】
本発明では上記の如く抽出されたトウチの水及び/又はアルコール抽出物中に含まれる分子量3000以上の成分の含有量を20重量%以下とすることを最大の特徴とし、具体的には該抽出物から分子量3000以上の成分を取除いて、その成分の含有量を20重量%以下、好ましくは0.1〜10重量%にすることにより、本発明のα−グルコシダーゼ阻害剤が得られるのであって、該含有量が20重量%を越えると、グルコシダーゼ阻害活性の向上が見られず不適当である。
【0010】
なお、本発明での分子量は試料をゲル濾過クロマトグラフィーにより測定する。具体的には分子量既知のアミノ酸、ペプチド、蛋白質〔Ala(分子量89)、Ile−Tyr(分子量330)、Asp−Gly−Leu−Tyr−Pro(分子量563)、ニューロテンシン(分子量1637)、リボヌクレアーゼ(分子量13700)〕を標準物質として、以下の条件で抽出物を溶出させて、溶出時間を測定し、対数グラフの縦軸に分子量、横軸に溶出時間をプロットした検量線に基づいて分子量を求める。なお本発明では、分子量3000以上の成分の重量%は得られた溶出チャートの分子量3000の位置でピークを分割し、3000以上の成分に相当するピーク面積の面積%で求めることとする。
【0011】
(分画条件)
カラム :Protein Pak60(Waters社製)5×250mm
移動相 :0.1容量%TFA(トリフルオロ酢酸)含有50容量%アセトニトリル水溶液
流速 :1mL/min
検出 :RI
サンプル量:1mg
【0012】
(標準物質の分子量と溶出時間の関係)

Figure 0003911366
上記条件では分子量3000の物質は25分に溶出されるので、本発明では25分以前に溶出する物質を分子量3000以上の成分とする。
【0013】
分子量3000以上の成分を取除く方法としては、▲1▼ゲル濾過クロマトグラフィーにより、分子量3000以上の画分を取除く方法、▲2▼膜処理により、分子量3000以上の画分を除く方法、▲3▼該抽出物をメタノール、エタノール、プロパノール、ブタノール、クロロホルム、酢酸エチル、トルエン、ヘキサン、ベンゼンなどの極性有機溶媒を用いた溶媒分画法で高分子画分を取除く方法等を単独あるいは適宜組合わせて実施する。
かかる▲1▼〜▲3▼の方法について簡単に説明する。
▲1▼の方法は前記分子量の分析法として述べた方法を工業的なスケールで実施する。
▲2▼の方法は、抽出物を分画分子量が3000程度の膜(UF膜)、例えばミリポア社製UF膜「PLBC(分画分子量3000)」、旭化成製UF膜「SEP1013(分画分子量3000)」等を通過させて実施する。
▲3▼の方法は、水/及びアルコール抽出液を析出物が出ない程度に濃縮して、そこに5〜10倍程度のアルコールを添加することにより、高分子物質を沈殿させる方法である。
【0014】
かくして得られた本発明のα−グルコシダーゼ阻害剤は、血糖上昇抑制作用を有しているので水、エタノール、エチレングリコール、ポリエチレングリコールなどの液状担体や、でんぷん、セルロース、ポリアミド粉末などの固形担体などの無毒性担体で希釈して、アンプル剤、顆粒剤、錠剤、丸剤、カプセル剤、シロップ剤などの医薬品、健康食品として代謝異常の患者食又は予防薬、糖尿病の予防薬、あるいは抗肥満食、ダイエット食として用いることができる。さらに、本発明のα−グルコシダーゼ阻害剤を含有する上記製剤を、食前、食中、食後、食間などに服用することにより、喫食による血糖濃度の増加を抑制することができる。
【0015】
本発明の阻害剤はトウチの水及び/又はアルコール抽出物の2〜1000倍の阻害活性を持つので、摂取量としては、乾燥粉末として、0.00001〜5g/日が好ましく、特に0.005〜0.1g/日が好ましい。
【0016】
本発明のα−グルコシターゼ阻害剤は、食品に添加することも可能で、例えば、以下のような食品に添加可能である。
(1)農水産加工品
はるさめ、こしあん、こんにゃく、パン、麺類(即席めん、パスタ、生めん、乾めん)、餅、シリアル食品、大豆加工品(豆腐、豆乳、納豆、凍豆腐)、水産加工品〔練り製品、(かに風味)蒲鉾、(魚肉)ハム、(魚 肉)ソーセージ、(魚肉)ウィンナー、ふりかけ、お茶づけのり〕、卵含有食品(スープ、丼等)、缶詰(シーチキン、オイルサーディン、焼鳥)、レトルト食品(カレー、シチュー、スパゲティー)
(2)乳製品
牛乳、加工乳、乳酸菌飲料、バター、チーズ、練乳、粉乳
(3)調味料
味噌、醤油、うま味(風味)調味料、(粉末)天然調味料、ソース、ドレッシング、焼き肉のたれ、みりん、カレー、シチュー、香辛料、スパイス、ヨーグルト
(4)健康食品(栄養補助食品)
▲1▼サポニン含有食品(オタネニンジン根含有食品、エゾウコギ含有食品)
▲2▼糖含有食品〔オリゴ糖(フラクトオリゴ糖含有食品、イソマルトオリゴ糖含有食品、ガラクトオリゴ糖含有食品)、多糖類(シイタケ含有食品、ムコ多糖、蛋白含有食品、コンドロイチン硫酸含有食品、マンネンタケ(霊芝)含有食品、キチン、キトサン含有食品
▲3▼ミネラル含有食品(カルシウム含有食品、アルファルファ含有食品、プルーンエキス食品、β−カロチン含有食品
▲4▼油脂含有食品
ビタミンE含有油脂〔麦(小麦、鳩麦)胚芽油、大豆胚芽油、米胚芽 油〕エイコサペンタエン酸含有食品、大豆レシチン含有食品、γ−リノレン酸含有食品(月見草油、ボラージ油)、ドコサヘキサエン酸含有食品
▲5▼蛋白質含有食品
大豆蛋白含有食品、カゼイン、ホエー蛋白、鯉加工食品
▲6▼タウリン
牡加工食品、シジミ加工食品、緑イ貝加工食品
(5)その他
スッポン加工食品、アミノ酸代謝異常用食品、流動食(病食)
また、下記のような、糖を多量に含有する食品にも添加可能であるが、本発明の効果が明確に発現しない場合もあり、下記のような食品に添加する場合は、糖含有量をできるだけ低くしてから添加するのが好ましい。
(6)菓子
ケーキ、ムース、(粉末)デザート、アイスクリーム、飴、チョコレート、グミ、キャンディー、クッキー、ウエハース、ゼリー
(7)飲料
清涼飲料(炭酸飲料、果実飲料、スポーツドリンク、栄養飲料)、嗜好飲料(コーヒー、ココア、麦汁)
【0017】
上記(1)〜(7)における添加量としては、上記食品に対して、乾燥粉末として、0.00001〜20重量%が好ましく、特に0.001〜10重量%が好ましい。
更に本発明の効果を阻害しない範囲で、甘味剤、保存剤、分散剤、着色剤、酸化防止剤等も併用することができる。更に、その他の公知のα−グルコシダーゼ阻害剤であるバリエナミンやアミノシクリトールなどのα−グルコシダ一ゼ阻害剤と併用してもよい。
【0018】
【実施例】
以下本発明について具体的に説明する。尚、以下の記述で「%」とあるのは重量%である。
実施例1
乾燥したトウチ1kgを10lの50%メタノール水溶液に室温で1日浸漬抽出し、得られた浸漬液をロータリーエバポレーターで濃縮し、これを水に溶解した後、ろ過した。得られたろ液を減圧濃縮し、抽出液(E−1)を得た。
該抽出液をロータリーエバポレーターで乾固したところ193gの固形物を得た。該固形物の30gを下記の条件で膜処理して、膜濃縮画分(E−3)を取除いて、膜通過画分(E−2)を得て濃縮乾固して5.8gの乾固物を得た。膜通過画分(E−2)は本発明の方法で分子量を測定したところ、分子量3000以上の成分の含有量は15%であった。
(膜処理条件)
装置 :レモリーノ(ミリポア社製)
膜 :PLBC(分画分子量3000、ミリポア社製)
加圧条件:窒素ガスにより5kgに加圧
それぞれの画分(E−1、E−2、E−3)のα−グルコシダーゼ阻害活性を以下のように測定した。
【0019】
(1)ラット小腸からの二(三)糖加水分解酵素(α−グルコシダーゼ)の調製冷凍保存しておいたラット小腸(空腸)を解凍し、粘膜をピンセットで押出すように採取した。該粘膜に5倍重量の5mMエチレンジアミン四酢酸を含む0.1Mリン酸カリウム緩衝液(pH7.0)を加え、冷却しながらホモゲナイズした。その後遠心分離(4℃、21000×g、60分)し、得られた沈殿物に5倍重量になるように1%トリトンX−100を含む0.1Mリン酸カリウム緩衝液(pH7.0)を加え、可溶化処理(4℃、60分)を行った。これを超遠心分離(4℃、110000×g、90分)し、この上清を0.01Mリン酸カリウム緩衝液(pH7.0)で透析(4℃、24時間)し、酵素液とした。
【0020】
(2)酵素(α−グルコシダーゼ)活性の測定
酵素活性は市販のキットを用い、基質としてはシュクロースを用いた。
標準反応液組成は、60mM基質溶液(シュクロースを0.1Mリン酸カリウム緩衝液pH6.3に溶解してたもの)0.7ml、被験物質溶液(それぞれの分画成分の水、有機溶剤を完全に除去した後、50%ジメチルスルホキシド水溶液に溶解)0.2ml、上記酵素液0.1ml(計1.0ml)とした。これを37℃、15分間反応させ、2Mトリス塩酸緩衝液(pH7.0)1.5mlを用いて反応を停止させ試験液とした。
次に96穴マイクロプレートに1穴あたり発色試薬〔グルコースBテストワコー(和光純薬製)〕200μlに試験液50μl(酢酸エチル等は留去したもの)を加え、37℃で30分間インキュベートした後、マイクロプレートリーダ(BIO RAD社製、MODEL550)で490nmの吸光度を測定した。基質溶液の代りに0.1Mリン酸カリウム緩衝液(pH6.3)を加えた時の吸光度をブランク値とし、この値を差し引いた値をA490sとした。被験液の代りに50重量%ジメチルスルホキシド水溶液を加えた時の吸光度をコントロール値(A490c)とし、下式によりα−グルコシダーゼ阻害活性を求めた。測定は2回行い、平均値を測定値とした。
【0021】
α−グルコシダーゼ阻害活性(%)=[(A490c−A490s)/A490c]×100それぞれの画分(E−1、E−2、E−3)のα−グルコシダーゼ阻害活性を表1に示した。
【0022】
【表1】
Figure 0003911366
*それぞれの分画成分を濃縮乾固して重量を求め、原料の重量に対する値とした。
尚E−1中の分子量3000以上の成分の含有量は80%であった。
【0023】
実施例2
実施例1で得られた(E−1)の濃縮乾固物30gを100mlの水に溶解後、エタノールを95容量%となるように添加して室温で一晩放置して、析出した画分(E−4)を濾過して取除き、溶解液からエタノールを減圧留去して、画分(E−5)4.2gを得た。該画分(E−5)は本発明の方法で分子量を測定したところ、分子量3000以上の成分の含有量は5%であった。
実施例1と同様にα−グルコシダーゼ阻害活性を測定し、表2に示した。
【0024】
【表2】
Figure 0003911366
*それぞれの分画成分を濃縮乾固して重量を求め、原料の重量に対する値とした。
【0025】
【発明の効果】
本発明のα−グルコシダーゼ阻害剤は、トウチの水及び/又はアルコール抽出物の分子量3000以上の成分の含有量を20重量%以下としたもので、摂取し易く、強い阻害活性を示す。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an α-glucosidase inhibitor comprising, as an active ingredient, a touchi that can be used in pharmaceuticals, foods, health foods, foods for specified health use, and the like.
[0002]
[Prior art]
An α-glucosidase inhibitor inhibits α-glucosidase localized in the microvilli of the small intestine, and suppresses a rapid increase in blood glucose level and subsequent increase in insulin level after Diabate Medicine, 10 , 688 (1993). In order to suppress the metabolism of carbohydrates (especially starch-derived oligosaccharides, sucrose, etc.) in humans and non-human animals, for example, it exhibits an effect of suppressing blood sugar rise and is derived from hyperglycemia and hyperglycemia. It is useful for improving various diseases such as obesity and diabetes. In addition, foods produced by adding an α-glucosidase inhibitor are suitable for dietary abnormal patient foods, and are also suitable for healthy people as metabolic metabolic preventive foods.
[0003]
As an α-glucosidase inhibitor derived from food, for example, JP-A-9-65836 discloses an enzyme hydrolyzate of animal protein or plant protein, and JP-A-5-17364 discloses tea polyphenol. Is disclosed.
[0004]
[Problems to be solved by the invention]
However, the α-glucosidase inhibitor described in JP-A-9-65836 must be ingested in large quantities as food in order to exhibit activity, and disclosed in JP-A-5-17364. According to the technology, the purification of polyphenols is complicated, and it is necessary to consume a large amount of tea that is usually consumed.
The present applicant previously reported in Japanese Patent Application No. 10-239326 that touchi (bean drum), which is also used as an ingredient in Chinese cuisine, has a strong α-glucosidase inhibitory activity. This is more effective in terms of inhibitory activity than conventionally known α-glucosidase inhibitors, and the raw materials are easily available and ingested easily. However, further improvement in α-glucosidase inhibitory activity is a problem.
[0005]
[Means for Solving the Problems]
As a result of diligent research on the above problems, it was found that a water and / or alcohol extract of touchi and a component having a molecular weight of 3000 or more and 20% by weight or less exhibited strong inhibitory activity and completed the present invention. did.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The touchi used in the present invention is usually fermented with steamed soybeans using a koji, and natto such as Daitokuji natto, Hama natto, Tera natto, salt to natto, and Ikkyuji natto are also included in the present invention. It is.
In general, salting is performed when fermenting, but it is also possible to use the same product prepared by omitting salting and desalted at the end of fermentation.
[0007]
The α-glucosidase inhibitor according to the present invention is extracted from the torch as described above with water and / or alcohol. Examples of the alcohol used for the extraction include methanol, ethanol, propanol, butanol, etc. preferable. Examples of the extraction method include extraction methods such as stirring extraction, immersion extraction, and supercritical extraction. Usually, stirring extraction or immersion extraction is used. When water and alcohol are used in combination, the water / alcohol mixing ratio (weight ratio) is preferably 1/10 to 10/1, and more preferably 1/5 to 5/1.
[0008]
When extracting with water, the touchi is crushed as it is, or 1 to 20 times the amount of water is added thereto, followed by stirring and extraction at 40 to 60 ° C. for 12 to 20 hours, or at 100 to 140 ° C. for 1 to 3 hours. Extract with stirring.
In the case of alcohol extraction or water and alcohol extraction, the touchi is crushed as it is or crushed, and 1 to 15 times the weight of alcohol, or water and alcohol is added thereto, followed by stirring and extraction at 40 to 60 ° C. for 3 to 10 hours, And soaking for 10 hours to 7 days, and further distilling off the alcohol.
The water and / or alcohol extract obtained by the above extraction method usually contains 30 to 90% by weight of a component having a molecular weight of 3000 or more, which will be described later.
[0009]
In the present invention, the maximum feature is that the content of components having a molecular weight of 3000 or more contained in the water and / or alcohol extract of touchi extracted as described above is 20% by weight or less. The α-glucosidase inhibitor of the present invention can be obtained by removing the component having a molecular weight of 3000 or more from the product and setting the content of the component to 20% by weight or less, preferably 0.1 to 10% by weight. If the content exceeds 20% by weight, the glucosidase inhibitory activity is not improved, which is inappropriate.
[0010]
The molecular weight in the present invention is measured by gel filtration chromatography on a sample. Specifically, amino acids, peptides, proteins [Ala (molecular weight 89), Ile-Tyr (molecular weight 330), Asp-Gly-Leu-Tyr-Pro (molecular weight 563), neurotensin (molecular weight 1637), ribonuclease (molecular weight 1637) The molecular weight is 13700)]) as a standard substance, the extract is eluted under the following conditions, the elution time is measured, and the molecular weight is obtained based on a calibration curve in which the vertical axis of the logarithmic graph is plotted with the molecular weight and the horizontal axis is the elution time. . In the present invention, the weight% of the component having a molecular weight of 3000 or more is obtained by dividing the peak at the position of the molecular weight of 3000 in the obtained elution chart and calculating the area% of the peak area corresponding to the component of 3000 or more.
[0011]
(Fractionation conditions)
Column: Protein Pak60 (Waters) 5 × 250 mm
Mobile phase: 50% by volume acetonitrile aqueous solution containing 0.1% by volume TFA (trifluoroacetic acid) Flow rate: 1 mL / min
Detection: RI
Sample amount: 1mg
[0012]
(Relationship between molecular weight of standard substance and elution time)
Figure 0003911366
Under the above conditions, a substance having a molecular weight of 3000 is eluted in 25 minutes. Therefore, in the present invention, a substance eluting before 25 minutes is used as a component having a molecular weight of 3000 or more.
[0013]
As a method for removing components having a molecular weight of 3000 or more, (1) a method for removing fractions having a molecular weight of 3000 or more by gel filtration chromatography, (2) a method for removing fractions having a molecular weight of 3000 or more by membrane treatment, 3) A method of removing the polymer fraction by a solvent fractionation method using a polar organic solvent such as methanol, ethanol, propanol, butanol, chloroform, ethyl acetate, toluene, hexane, benzene, etc. alone or as appropriate Implement in combination.
The methods (1) to (3) will be briefly described.
In the method (1), the method described as the molecular weight analysis method is carried out on an industrial scale.
In the method (2), the extract is separated into a membrane having a fractional molecular weight of about 3000 (UF membrane), for example, a UF membrane “PLBC (fractional molecular weight 3000)” manufactured by Millipore, a UF membrane “SEP1013 (fractional molecular weight 3000) manufactured by Asahi Kasei. ) ”Etc. and carry out.
The method (3) is a method of precipitating the polymer substance by concentrating the water / alcohol extract to such an extent that no precipitate is produced and adding about 5 to 10 times the alcohol thereto.
[0014]
The α-glucosidase inhibitor of the present invention thus obtained has a blood glucose elevation-inhibiting action, so that it is a liquid carrier such as water, ethanol, ethylene glycol or polyethylene glycol, or a solid carrier such as starch, cellulose or polyamide powder. Diluted with a non-toxic carrier, drugs such as ampoules, granules, tablets, pills, capsules, syrups, etc., dietary or preventive drugs for metabolic disorders as health foods, preventive drugs for diabetes, or anti-obesity foods It can be used as a diet food. Furthermore, by taking the above-mentioned preparation containing the α-glucosidase inhibitor of the present invention before meals, during meals, after meals, between meals, etc., an increase in blood glucose concentration due to eating can be suppressed.
[0015]
Since the inhibitor of the present invention has an inhibitory activity 2 to 1000 times that of water and / or alcohol extract of touchi, the intake is preferably 0.00001 to 5 g / day, particularly 0.005 as a dry powder. ~ 0.1 g / day is preferred.
[0016]
The α-glucosidase inhibitor of the present invention can be added to foods. For example, it can be added to the following foods.
(1) Agricultural and fishery products Harusame, koshian, konjac, bread, noodles (instant noodles, pasta, raw noodles, dried noodles), rice cakes, cereal foods, processed soybean products (tofu, soymilk, natto, frozen tofu), processed fishery products , (Crab flavor) salmon, (fish meat) ham, (fish meat) sausage, (fish meat) wiener, sprinkle, tea sauce, egg-containing food (soup, salmon, etc.), canned food (sea chicken, oil sardine, yakitori) , Retort food (curry, stew, spaghetti)
(2) Dairy milk, processed milk, lactic acid bacteria beverage, butter, cheese, condensed milk, powdered milk (3) seasoning miso, soy sauce, umami (flavor) seasoning, (powder) natural seasoning, sauce, dressing, grilled meat , Mirin, curry, stew, spices, spices, yogurt (4) health food (dietary supplement)
(1) Saponin-containing foods (Ginseng root-containing foods, Ezokogi-containing foods)
(2) Sugar-containing foods [oligosaccharides (fructo-oligosaccharide-containing foods, isomalt-oligosaccharide-containing foods, galactooligosaccharide-containing foods), polysaccharides (shiitake-containing foods, mucopolysaccharides, protein-containing foods, chondroitin sulfate-containing foods, mannentake (reishi) ) Contained foods, chitin, chitosan-containing foods ▲ 3 ▼ mineral-containing foods (calcium-containing foods, alfalfa-containing foods, prunes extract foods, β-carotene-containing foods ④ oils and fats-containing foods vitamin E-containing fats [wheat (wheat, pigeon) Germ oil, soybean germ oil, rice germ oil] Eicosapentaenoic acid-containing foods, soybean lecithin-containing foods, γ-linolenic acid-containing foods (Evening primrose oil, borage oil), docosahexaenoic acid-containing foods (5) Protein-containing foods, soy protein-containing foods , Casein, whey protein, processed food for salmon ▲ 6 ▼ taurine oyster processed food, processed shijimi Goods, Midoriikai processed foods (5) Other soft-shelled turtle processed foods, amino acid metabolic disorders for food, liquid diet (disease diet)
Moreover, although it can be added to foods containing a large amount of sugar as described below, the effects of the present invention may not be clearly expressed. It is preferable to add as low as possible.
(6) Confectionary cake, mousse, (powder) dessert, ice cream, candy, chocolate, gummi, candy, cookies, wafers, jelly (7) Beverage soft drink (carbonated drink, fruit drink, sports drink, nutrition drink), taste Beverages (coffee, cocoa, wort)
[0017]
As addition amount in said (1)-(7), 0.00001-20 weight% is preferable as dry powder with respect to the said foodstuff, and 0.001-10 weight% is especially preferable.
Furthermore, sweeteners, preservatives, dispersants, colorants, antioxidants and the like can be used in combination as long as the effects of the present invention are not impaired. Furthermore, you may use together with alpha-glucosidase inhibitors, such as other known alpha-glucosidase inhibitors, such as valienamine and aminocyclitol.
[0018]
【Example】
The present invention will be specifically described below. In the following description, “%” is weight%.
Example 1
1 kg of dried touchi was extracted by immersion in 10 l of 50% aqueous methanol solution at room temperature for 1 day. The obtained immersion liquid was concentrated with a rotary evaporator, dissolved in water, and then filtered. The obtained filtrate was concentrated under reduced pressure to obtain an extract (E-1).
The extract was dried with a rotary evaporator to obtain 193 g of a solid. 30 g of the solid was subjected to membrane treatment under the following conditions to remove the membrane-enriched fraction (E-3) to obtain a membrane-passing fraction (E-2) and concentrated to dryness to obtain 5.8 g of A dried product was obtained. When the molecular weight of the membrane-passing fraction (E-2) was measured by the method of the present invention, the content of components having a molecular weight of 3000 or more was 15%.
(Membrane treatment conditions)
Equipment: Remolino (Millipore)
Membrane: PLBC (fractionated molecular weight 3000, manufactured by Millipore)
Pressurization condition: Pressurized to 5 kg with nitrogen gas The α-glucosidase inhibitory activity of each fraction (E-1, E-2, E-3) was measured as follows.
[0019]
(1) Preparation of di (3) sugar-hydrolyzing enzyme (α-glucosidase) from rat small intestine The rat small intestine (jejunum) that had been stored frozen was thawed, and the mucous membrane was collected by extrusion with forceps. A 0.1 M potassium phosphate buffer solution (pH 7.0) containing 5 times the weight of 5 mM ethylenediaminetetraacetic acid was added to the mucous membrane and homogenized while cooling. Thereafter, the mixture was centrifuged (4 ° C., 21000 × g, 60 minutes), and 0.1 M potassium phosphate buffer (pH 7.0) containing 1% Triton X-100 so that the obtained precipitate had a weight of 5 times. And solubilization treatment (4 ° C., 60 minutes) was performed. This was subjected to ultracentrifugation (4 ° C., 110000 × g, 90 minutes), and the supernatant was dialyzed against 0.01 M potassium phosphate buffer (pH 7.0) (4 ° C., 24 hours) to obtain an enzyme solution. .
[0020]
(2) Measurement of enzyme (α-glucosidase) activity A commercially available kit was used for enzyme activity, and sucrose was used as a substrate.
The standard reaction solution composition was 0.7 ml of a 60 mM substrate solution (dissolved sucrose in 0.1 M potassium phosphate buffer pH 6.3), a test substance solution (water and organic solvent of each fraction component). After complete removal, it was dissolved in 50% dimethyl sulfoxide aqueous solution (0.2 ml) and the enzyme solution was 0.1 ml (1.0 ml in total). This was reacted at 37 ° C. for 15 minutes, and the reaction was stopped using 1.5 ml of 2M Tris-HCl buffer (pH 7.0) to prepare a test solution.
Next, after adding 50 μl of a test solution (ethyl acetate etc. distilled off) to 200 μl of a color developing reagent [glucose B test Wako (manufactured by Wako Pure Chemical Industries)] per 96-well microplate and incubating at 37 ° C. for 30 minutes The absorbance at 490 nm was measured with a microplate reader (BIO RAD, MODEL550). The absorbance when 0.1 M potassium phosphate buffer (pH 6.3) was added instead of the substrate solution was defined as a blank value, and the value obtained by subtracting this value was defined as A 490s . The absorbance when 50% by weight dimethyl sulfoxide aqueous solution was added instead of the test solution was taken as a control value (A 490c ), and α-glucosidase inhibitory activity was determined by the following equation. The measurement was performed twice, and the average value was taken as the measured value.
[0021]
α-glucosidase inhibitory activity (%) = [(A 490c -A 490s ) / A 490c ] × 100 The α-glucosidase inhibitory activity of each fraction (E-1, E-2, E-3) is shown in Table 1. Indicated.
[0022]
[Table 1]
Figure 0003911366
* Each fraction component was concentrated and dried to obtain the weight, which was a value relative to the weight of the raw material.
The content of components having a molecular weight of 3000 or more in E-1 was 80%.
[0023]
Example 2
30 g of the concentrated dry product of (E-1) obtained in Example 1 was dissolved in 100 ml of water, ethanol was added to a volume of 95% by volume, and the mixture was allowed to stand overnight at room temperature. (E-4) was removed by filtration, and ethanol was distilled off from the solution under reduced pressure to obtain 4.2 g of a fraction (E-5). When the molecular weight of the fraction (E-5) was measured by the method of the present invention, the content of a component having a molecular weight of 3000 or more was 5%.
The α-glucosidase inhibitory activity was measured in the same manner as in Example 1 and shown in Table 2.
[0024]
[Table 2]
Figure 0003911366
* Each fraction component was concentrated and dried to obtain the weight, which was a value relative to the weight of the raw material.
[0025]
【The invention's effect】
The α-glucosidase inhibitor of the present invention has a content of components having a molecular weight of 3000 or more in water and / or alcohol extract of touchi which is 20% by weight or less, is easy to ingest, and exhibits strong inhibitory activity.

Claims (1)

トウチの水及び/又はアルコール抽出物であり、かつ分子量3000以上の成分の含有量が20重量%以下であることを特徴とするα−グルコシダーゼ阻害剤。An α-glucosidase inhibitor, which is a water and / or alcohol extract of touchi and contains 20% by weight or less of a component having a molecular weight of 3000 or more.
JP18763499A 1998-08-26 1999-07-01 α-Glucosidase inhibitor Expired - Lifetime JP3911366B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP18763499A JP3911366B2 (en) 1999-07-01 1999-07-01 α-Glucosidase inhibitor
EP99938534A EP1025851B1 (en) 1998-08-26 1999-08-20 Alpha-glucosidase inhibitor
DE69903911T DE69903911T2 (en) 1998-08-26 1999-08-20 alpha-GLUCOSIDASE HEMMER
PCT/JP1999/004466 WO2000012109A1 (en) 1998-08-26 1999-08-20 α-GLUCOSIDASE INHIBITOR
CNB998014648A CN1170550C (en) 1998-08-26 1999-08-20 Alpha-glucosidase inhibitor
US09/530,063 US6299911B1 (en) 1998-08-26 1999-08-20 Extract of Touchi containing an α-glucosidase inhibitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18763499A JP3911366B2 (en) 1999-07-01 1999-07-01 α-Glucosidase inhibitor

Publications (2)

Publication Number Publication Date
JP2001010965A JP2001010965A (en) 2001-01-16
JP3911366B2 true JP3911366B2 (en) 2007-05-09

Family

ID=16209554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18763499A Expired - Lifetime JP3911366B2 (en) 1998-08-26 1999-07-01 α-Glucosidase inhibitor

Country Status (1)

Country Link
JP (1) JP3911366B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006296251A (en) * 2005-04-19 2006-11-02 Gunze Ltd alpha-GLUCOSIDASE INHIBITOR
US8815312B2 (en) 2006-05-26 2014-08-26 Nestec S.A. Methods of use and nutritional compositions of Touchi Extract

Also Published As

Publication number Publication date
JP2001010965A (en) 2001-01-16

Similar Documents

Publication Publication Date Title
KR101974975B1 (en) Composition for improving in vivo metabolism parameter
JP6344796B2 (en) Alzheimer-type dementia remedy for elderly
JP5709864B2 (en) Crude caffeine complex, improved food product using crude caffeine complex, and method of use thereof
JP4045401B2 (en) Degradation composition of royal jelly by proteolytic enzyme and food composition containing the same
US6299911B1 (en) Extract of Touchi containing an α-glucosidase inhibitor
JP3911366B2 (en) α-Glucosidase inhibitor
JP2000072687A (en) Alpha-glucosidase inhibitor
JP4795512B2 (en) Method for producing α-glucosidase inhibitor
JP5354520B2 (en) Novel peptide composition having kokumi imparting function
JP6015833B2 (en) Fermentation ripening beet, fermentation ripening beet paste of the processed product, fermentation ripening beet extract, method for producing fermentation ripening beet powder
JP5000214B2 (en) Novel compounds and osteoclast differentiation / proliferation inhibitors
JP3556009B2 (en) Foods and drinks containing easily absorbable minerals
JP4795511B2 (en) Method for producing α-glucosidase inhibitor
KR20130134733A (en) Composition for improving liver function containing fermented liquor of codonopsis lanceolata extract as effective component
JP2006104094A (en) alpha-GLUCOSIDASE INHIBITOR
JP3676637B2 (en) Method for producing α-glucosidase inhibitor
JP3827090B2 (en) Composition and use thereof
JP4795513B2 (en) Method for producing α-glucosidase inhibitor
JP4738571B2 (en) Method for producing α-glucosidase inhibitor
JP2007269685A (en) Physiological function enhancing composition
JP3710854B2 (en) Easily water soluble bayberry plant extract
JP2020019756A (en) Nitric oxide production promoter
JP2005179277A (en) Agent for inhibiting fat from accumulating in liver
JP6589011B2 (en) Oral composition for improving brain dysfunction
JP2010057483A (en) Visceral hypersensitivity-improving food

Legal Events

Date Code Title Description
A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20060621

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20060621

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20060622

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20070109

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20070129

R150 Certificate of patent or registration of utility model

Ref document number: 3911366

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100202

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110202

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110202

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120202

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120202

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130202

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140202

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term