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JP4577998B2 - Uric acid level lowering agent - Google Patents

Uric acid level lowering agent Download PDF

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Publication number
JP4577998B2
JP4577998B2 JP2001015187A JP2001015187A JP4577998B2 JP 4577998 B2 JP4577998 B2 JP 4577998B2 JP 2001015187 A JP2001015187 A JP 2001015187A JP 2001015187 A JP2001015187 A JP 2001015187A JP 4577998 B2 JP4577998 B2 JP 4577998B2
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JP
Japan
Prior art keywords
uric acid
ginkgo biloba
acid level
extract
lowering agent
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 - Fee Related
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JP2001015187A
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Japanese (ja)
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JP2002212085A (en
Inventor
治 長南
理恵 高橋
智史 松原
春恵 曽根
雅章 綿貫
尚 古江
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Yakult Honsha Co Ltd
Original Assignee
Yakult Honsha Co Ltd
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Filing date
Publication date
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Priority to JP2001015187A priority Critical patent/JP4577998B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、イチョウ葉抽出物を有効成分とする尿酸値低下剤および当該低下剤を含有することを特徴とする飲食品に関する。
【0002】
【従来の技術】
尿酸代謝異常の最も代表的な疾患である痛風は、すでに古代ギリシャのヒポクラテスの時代から知られている非常に古い疾患である。しかし、痛風の病態と尿酸代謝異常との関係が明らかにされたのは、18世紀の終わりのことであり、それまで痛風は、関節痛発作と同一に捉えられ、コルヒチンが疼痛発作の治療に用いられていた。
【0003】
現在では、痛風患者の血液中に尿酸が高濃度で存在することが明らかにされ、痛風患者の治療においては疼痛発作のみでなく、血中尿酸値を低下させることが最も重要であると考えられている。このための尿酸値低下剤としては、尿酸排泄促進剤と合成阻害剤が使用されている。その中でも、ヒポキサンチンからキサンチンを経て尿酸にいたる過程に働くキサンチンオキシダーゼの作用を阻害するアロプリノールは、現在知られている唯一の尿酸合成阻害剤として、痛風治療に広く用いられている(日本臨床、日本臨床社、1081−1085頁、1991)。
【0004】
さらに、高尿酸血症の是正は動脈硬化、心筋梗塞の予防に必要であり、腎不全の増悪を介する高血圧の予防にも意義あることとされている(日本臨床、日本臨床社、989−993頁、1991)。
【0005】
しかしながら、アロプリノール投与により、発熱、発疹ならびに肝障害、腎機能異常等が認められることや(医療薬日本医薬品集、薬業時報社、157−159頁、2000)、アロプリノールの代謝物であるオキシプリノールは透析患者において、体内に高濃度に蓄積することから血液障害、肝障害をきたすことが報告されている(疾患と治療薬、南江堂、212頁、1996)。
【0006】
この様な状況から、副作用のない尿酸値低下剤が求められている。また、前記尿酸値低下剤を含有し、高尿酸血症の是正ならびに高血圧症等の合併症の治療や予防に有効で、しかも安全性に優れた飲食品が求められている。
【0007】
【発明が解決しようとする課題】
従って、本発明の目的は、新規で副作用のない尿酸値低下剤を見出し、これを含有する、副作用もなく、高尿酸血症の是正ならびに高血圧症等の合併症の治療や予防に有効で、しかも安全性に優れた飲食品を提供することにある。
【0008】
【課題を解決するための手段】
本発明者は、上記課題を解決するべく鋭意研究を重ねた結果、イチョウ葉抽出物に優れた尿酸値低下作用があることを見出し、これが尿酸値低下剤や血圧降下剤等として有用であることを見出した。また、イチョウ葉抽出物を含有する食品を摂取することによっても高尿酸血症の是正や高血圧症等の緩和が可能であることを見出し、本発明を完成するに至った。
【0009】
すなわち本発明は、イチョウ葉抽出物を有効成分とする尿酸値低下剤を提供するものである。
【0010】
また、本発明は前記尿酸値低下剤を含有することを特徴とする飲食品を提供するものである。
【0011】
【発明の実施の形態】
本発明において尿酸値低下剤として用いられるイチョウ葉抽出物は、例えばイチョウ葉をそのままあるいは細断し、水や有機溶媒(アルコール、エーテル、アセトン等)等により抽出し、酢酸エチルその他の有機溶媒と水との分配、カラムクロマトグラフィー等、植物成分の分離、抽出に利用されている公知の方法を単独であるいは適宜組み合わせて精製することにより容易に得ることができる。また、得られた抽出物を、更にろ過等の手段で不純物を除去後、減圧下で濃縮したもの、あるいはスプレードライや自然乾燥等の手段により乾燥させたものを用いても良い。
【0012】
特に好ましいイチョウ葉抽出物の製造方法としては、乾燥したイチョウ葉を細断し、3〜10倍量の含水アルコールで抽出し、得られた抽出物を乾燥する方法を挙げることができる。抽出に用いられる含水アルコールとしては、尿酸値低下効果の点から水性エタノールを用いることが好ましく、特に70〜90質量%の水性エタノールの使用が好ましい。
【0013】
本発明の尿酸値低下剤および当該低下剤を含有する食品としてイチョウ葉抽出物を使用する場合の摂取量は、抽出物の固形物量として、20mg〜360mg/日、特に好ましくは40mg〜120mg/日である。
【0014】
本発明において使用されるイチョウ葉抽出物は毒性が低いものである。例えば、これをマウスに大量に投与した場合においても、マウス体重kg当り12g投与付近まで死亡例は認められず、LD50値は、マウスで体重kg当り15.3gである。ちなみに、LD50が15.3g/kgというレベルは、食品に使用されている各種添加物などに比較しても、極めて急性毒性は低いといえる。なお、大量投与による死亡例は、消化・吸収の結果というよりは、急激な浸透圧ショックの様相を示し、死亡をまぬがれた個体は、後遺症のような行動は外見上からは、一切認められなかった。以上の結果から、一度に大量摂取した場合の悪影響の可能性は、少ないと判断される。
【0015】
本発明の尿酸値低下剤で使用されるイチョウ葉抽出物は、後記実施例で明らかにするように、卓越した尿酸値低下作用を有し、且つ安全性も極めて高いものであり、飲食品に添加使用できるほか、当該作用を利用して各種の医薬品としても使用することができるものである。
【0016】
飲食品に利用する場合には、種々の飲食品にイチョウ葉抽出物を含有させればよい。具体的な飲食品としては、清涼飲料、発酵乳、ケフィア、果汁飲料、スープ、せんべい、クッキー、錠菓等が挙げられ、中でも各種生薬等を含有する飲料は風味面から好ましい。
【0017】
飲食品の製造は、常法に従い行えば良く、例えば飲料であれば、以下のようにして製造できる。まず、イチョウ葉抽出物とその他の副原料を混合溶解後、均質化し、HTST殺菌機等を用いて加熱殺菌し、容器に充填、密封する。容器は缶、PET容器、瓶、紙等のいずれの容器でも良い。
【0018】
飲食品の副原料としては、例えば、クコシ、カンゾウ、レイシ、アガリクス、エノキタケ、オタネニンジン、サンシチニンジン、クロレラ、シイタケ、シロマイタケ、ハンピ、プロポリス、マイタケ、ヤマブシダケ、ローヤルゼリー、アメリカニンジン、エキナセア、カキ肉、クマザサ、ゲンチアナ、セイヨウオトギリソウ、チクセツニンジン、トウチュウカソウ、ドクダミ、トチバニンジン、ナメコ、ノコギリヤシ、ハタケシメジ、ヒラタケ、ブナシメジ、マッシュルーム等の生薬類、蔗糖、異性化等、グルコース、フラクトース、パラチノース、トレハロース、ラクトース、キシロース等の糖類、ソルビトール、キシリトール、エリスリトール、ラクチトール、パラチニット、還元水飴、還元麦芽糖水飴等の糖アルコール類、アスパルテーム、スクラロース、アセスルファムカリウム、ステビア等の高甘味度甘味料、蔗糖脂肪酸エステル、グリセリン脂肪酸エステル、レシチン等の乳化剤、カラギーナン、キサンタンガム、グァーガム、ペクチン、ローカストビーンガム等の増粘(安定)剤、クエン酸、乳酸、リンゴ酸等の酸味料、レモン果汁、オレンジ果汁、ベリー系果汁等の果汁類、ビタミンA、ビタミンB類、ビタミンC、ビタミンE等のビタミン類やカルシウム、鉄、マンガン、亜鉛等のミネラル類、梅エキス等が挙げられる。
特に甘味料と、クコシ、カンゾウ、レイシ等の生薬類とを組み合わせた場合には最終製品の風味が良好となるため好ましく、一方で前記糖アルコール類を併用すれば、飲料を製造した場合の安定性が向上するため好ましい。
【0019】
医薬品として利用する場合には、イチョウ葉抽出物を有効成分とし、これに常用される無機又は有機の担体を加えて、固体、半固体又は液体の形で、経口投与剤のほか、外用剤等の非経口投与剤に製剤化することもできる。
【0020】
経口投与のための製剤としては、錠剤、丸剤、顆粒剤、軟・硬カプセル剤、散剤、細粒剤、粉剤、乳濁剤、懸濁剤、シロップ剤、ペレット剤、エリキシル剤等が挙げられる。非経口投与のための製剤としては、注射剤、点滴剤、輸液、軟膏、ローション、トニック、スプレー、懸濁剤、油剤、乳剤、坐剤等が挙げられる。本発明品の有効成分を製剤化するには、常法にしたがえばよく、界面活性剤、賦形剤、着色料、着香料、保存料、安定剤、緩衝剤、懸濁剤、等張剤その他常用されている補助剤を適宜使用する。
【0021】
【実施例】
以下、実施例をあげて本発明を具体的に説明するが、これらは何ら本発明を制約するものではない。
【0022】
参 考 例 1
< イチョウ葉抽出物の製造 >
細断したイチョウ葉に5倍量の80質量%水性エタノールを加えて60℃で4時間抽出した。得られた抽出物を減圧下で5分の1の量となるまで濃縮した後、ろ過して不純物を除去した。この濃縮物を80℃で30分間滅菌した後、スプレードライヤーで噴霧乾燥してイチョウ葉抽出乾燥粉末2.5kgを得た。
【0023】
実 施 例 1
ヒトにおける血中尿酸値低下および血圧降下作用の測定:
イチョウ葉抽出物のヒトにおける血中尿酸値低下および血圧降下作用を次のようにして調べた。
【0024】
< 試験方法 >
試験対象者は、収縮期血圧140mmHgもしくは拡張期血圧85mmHg以上の臨床的に健康な日常生活を営む成人16名として、一群8名の2群に分けた。この試験対象者を2群に分け、それぞれ下記組成のイチョウ葉抽出物飲料、またはこのイチョウ葉抽出物飲料からイチョウ葉抽出物のみを除いた対照飲料を12週間、1日1本飲用してもらった。摂取前、ならびに摂取終了時、12時間以上の空腹状態の後、採血を行い、尿酸値の測定を行った。また、熟練した保健婦による水銀血圧計による血圧測定ならびに心拍数の測定を行った。血圧の測定は、最低5分間の安静後、座位で3回ずつ測定した。個々の血圧は3回の平均値を採用した。
【0025】
(処方) (g)
イチョウ葉抽出物* 0.04
炭水化物 16.6
ナトリウム 0.011
クコシエキス 適量
カンゾウエキス 適量
レイシエキス 適量
梅エキス 適量
*:参考例1で製造したもの。
【0026】
< 評価方法 >
降圧効果については、摂取前と、摂取12週後の収縮期血圧、拡張期血圧、平均血圧の差を比較して、「降圧薬の臨床評価方法に関するガイドライン」の降圧度審査基準に基づいて評価した(新薬臨床評価ガイドライン、薬事日報社、308−332頁、1994)。降圧度判定は降圧度を4段階に分類して判定し、収縮期による分類と拡張期による分類が一致しないときは、平均血圧による分類を用いた。
【0027】
結果はすべて平均値±標準誤差を示した。両群の平均値の差の検定にはt−検定を用いた。さらに、経時的な変動については対応のあるt−検定を用い、摂取前との比較を行った。各統計処理とも、有意水準は5%以下とし、両側検定にて行った。
【0028】
< 試験結果 >
対照飲料群の尿酸値に変化は認められなかったが、イチョウ葉抽出物飲料群の摂取12週後の尿酸値は、摂取前の値に比べ有意な低下が認められた。さらに、摂取12週後の対照飲料群の尿酸値と、イチョウ葉抽出物飲料群の尿酸値を比較してみると、イチョウ葉抽出物飲料群の尿酸値は有意に低い値であった。
【0029】
【表1】

Figure 0004577998
【0030】
摂取前と、摂取12週後の収縮期血圧、拡張期血圧、平均血圧の差を比較し、降圧度審査基準に基づいてイチョウ葉抽出物飲料の有効性を評価した。下降ないし下降傾向を示した者を有効とし、その値を求めてみると、対照飲料群の25%に対し、イチョウ葉抽出物飲料群は75%と高い値であった。
【0031】
【表2】
Figure 0004577998
【0032】
実 施 例 2
清涼飲料の製造:
下記処方により、常法に従って各成分を配合し、均質化して清涼飲料を得た。
得られた清涼飲料は褐色瓶に充填後、アルミキャップにて封印し、加熱処理を施した。これらは外観・風味ともに良好なものであった。
【0033】
(処方) (g)
イチョウ葉抽出物* 0.8
香料 0.8
水 55.32
還元澱粉糖化物 24
果糖 18
クコシエキス 0.1
カンゾウエキス 0.1
レイシエキス 0.1
梅エキス 0.1
クエン酸 0.3
*:参考例1で製造したもの。
【0034】
実 施 例 3
錠剤の製造:
下記処方で各種成分を混合して造粒・乾燥・整粒した後に、打錠して錠剤を製造した。
【0035】
(処方) (mg)
イチョウ葉抽出物* 40
微結晶セルロース 100
乳糖 80
ステアリン酸マグネシウム 0.5
メチルセルロース 12
タルカムパウダー 5
*:参考例1で製造したもの。
【0036】
【発明の効果】
本発明のイチョウ葉抽出物を有効成分とする尿酸値低下剤および当該低下剤を含有する飲食品は、高尿酸血症を是正し、ひいては高尿酸血症に伴う痛風、動脈硬化、心筋梗塞、腎不全、高血圧症等の予防又は治療に有効に利用することができる。
以 上[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a uric acid level-lowering agent comprising ginkgo biloba extract as an active ingredient and a food or drink containing the reducing agent.
[0002]
[Prior art]
Gout, the most common disorder of uric acid metabolism, is a very old disease already known from the time of Hippocrates in ancient Greece. However, the relationship between gout pathology and abnormal uric acid metabolism was revealed at the end of the 18th century. Until then, gout was considered the same as joint pain attacks, and colchicine was used to treat pain attacks. It was used.
[0003]
At present, it has been clarified that uric acid is present in a high concentration in the blood of gout patients, and it is considered to be most important in the treatment of gout patients to reduce not only pain attacks but also blood uric acid levels. ing. For this purpose, uric acid excretion promoters and synthesis inhibitors are used as uric acid level lowering agents. Among them, allopurinol, which inhibits the action of xanthine oxidase that works in the process from hypoxanthine to xanthine to uric acid, is widely used in the treatment of gout as the only known uric acid synthesis inhibitor (Japanese clinical, Japan Clinical Co., pp. 1081-1085, 1991).
[0004]
Furthermore, the correction of hyperuricemia is necessary for the prevention of arteriosclerosis and myocardial infarction, and is also considered to be significant for the prevention of hypertension via exacerbation of renal failure (Japanese Clinical, Nippon Clinic, 989-993). Page, 1991).
[0005]
However, administration of allopurinol may cause fever, rash, liver damage, renal function abnormality, etc. (Medical Drug Japan Pharmaceuticals, Yakugyo Hokpo, pages 157-159, 2000), and oxip, a metabolite of allopurinol. It has been reported that linole accumulates at high concentrations in the body in dialysis patients, causing blood and liver disorders (disease and therapeutic agent, Nanedo, page 212, 1996).
[0006]
Under such circumstances, a uric acid level-lowering agent having no side effect is demanded. There is also a need for foods and drinks that contain the uric acid level-lowering agent, are effective in correcting hyperuricemia, treating and preventing complications such as hypertension, and having excellent safety.
[0007]
[Problems to be solved by the invention]
Therefore, the object of the present invention is to find a novel uric acid level-lowering agent having no side effects, containing this, having no side effects, and effective in correcting hyperuricemia and treating or preventing complications such as hypertension, And it is providing the food / beverage products excellent in safety.
[0008]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventor has found that the ginkgo biloba extract has an excellent uric acid level lowering action, and this is useful as a uric acid level lowering agent, a blood pressure lowering agent, etc. I found. In addition, the present inventors have found that it is possible to correct hyperuricemia and alleviate hypertension by ingesting a food containing a ginkgo biloba extract, thereby completing the present invention.
[0009]
That is, the present invention provides a uric acid level-lowering agent comprising ginkgo biloba extract as an active ingredient.
[0010]
Moreover, this invention provides the food-drinks characterized by including the said uric acid value lowering agent.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The ginkgo biloba extract used as a uric acid level lowering agent in the present invention is, for example, a ginkgo biloba leaf as it is or shredded and extracted with water or an organic solvent (alcohol, ether, acetone, etc.), It can be easily obtained by purifying known methods used for separation and extraction of plant components, such as partitioning with water and column chromatography, alone or in combination. Further, the obtained extract may be used after further removing impurities by means such as filtration and then concentrating under reduced pressure or by drying by means such as spray drying or natural drying.
[0012]
A particularly preferred method for producing a ginkgo biloba extract is a method of chopping dried ginkgo biloba leaves, extracting with 3 to 10 times the amount of hydrous alcohol, and drying the resulting extract. As the hydrous alcohol used for extraction, it is preferable to use aqueous ethanol from the viewpoint of the effect of lowering the uric acid value, and it is particularly preferable to use 70 to 90% by mass of aqueous ethanol.
[0013]
The amount of ingestion when using the ginkgo biloba extract as the uric acid level-lowering agent and the food containing the lowering agent of the present invention is 20 mg to 360 mg / day, particularly preferably 40 mg to 120 mg / day, as the solid amount of the extract. It is.
[0014]
The ginkgo biloba extract used in the present invention has low toxicity. For example, even when this is administered to mice in a large amount, no death is observed until around 12 g / kg body weight of mice, and the LD 50 value is 15.3 g / kg body weight of mice. Incidentally, the level of LD 50 of 15.3 g / kg can be said to be extremely low in acute toxicity even when compared with various additives used in foods. In addition, death cases due to large doses show a more rapid osmotic shock rather than digestion / absorption results, and individuals who have survived death do not appear to have any after-effects. It was. From the above results, it is judged that the possibility of adverse effects when a large amount is ingested at one time is small.
[0015]
The ginkgo biloba leaf extract used in the uric acid level-lowering agent of the present invention has an excellent uric acid level-lowering action and is extremely safe, as will be clarified in the examples below. In addition to being usable, it can also be used as various pharmaceuticals by utilizing the action.
[0016]
What is necessary is just to contain a ginkgo biloba extract in various food-drinks when using for food-drinks. Specific foods and drinks include soft drinks, fermented milk, kefir, fruit juice drinks, soups, rice crackers, cookies, tablet confections, etc. Among them, drinks containing various herbal medicines are preferred in terms of flavor.
[0017]
The production of the food and drink may be performed according to a conventional method. For example, if it is a beverage, it can be produced as follows. First, the ginkgo biloba extract and other auxiliary materials are mixed and dissolved, then homogenized, heat sterilized using an HTST sterilizer, etc., and filled into a container and sealed. The container may be any container such as a can, a PET container, a bottle, or paper.
[0018]
As an auxiliary ingredient of food and drink, for example, kokushi, licorice, litchi, agaricus, enokitake, ginseng, sancytin ginseng, chlorella, shiitake mushroom, white maitake, hampi, propolis, maitake, yamabushitake, royal jelly, american carrot, echinacea, oyster meat , Kumazasa, Gentiana, Hypericum perforatum, Chicsetin ginseng, Acacia, Dokudami, Tochiban ginseng, Nameko, Saw palmetto, Hatake shimeji, Oyster mushrooms, Buna shimeji, Mushrooms, Sucrose, Lactose, Glucose, Fructose, Lactose Sugars such as xylose, sugar alcohols such as sorbitol, xylitol, erythritol, lactitol, palatinit, reduced starch syrup, reduced maltose starch syrup, asparte Sweeteners such as sucralose, acesulfame potassium and stevia, emulsifiers such as sucrose fatty acid ester, glycerin fatty acid ester and lecithin, thickeners such as carrageenan, xanthan gum, guar gum, pectin and locust bean gum, Acid, lactic acid, malic acid and other acidulants, lemon juice, orange juice, berry juice and other fruit juices, vitamin A, vitamin B, vitamin C, vitamin E and other vitamins, calcium, iron, manganese, zinc, etc. Minerals, plum extract and the like.
In particular, the combination of sweeteners and herbal medicines such as wolfberry, licorice, and litchi is preferable because the final product has a good flavor. On the other hand, when the sugar alcohols are used in combination, it is stable when a beverage is produced. This is preferable because of improved properties.
[0019]
When used as a pharmaceutical, ginkgo biloba extract is used as an active ingredient, and commonly used inorganic or organic carriers are added, and in solid, semi-solid or liquid form, in addition to orally administered drugs, external preparations, etc. It can also be formulated into a parenteral administration agent.
[0020]
Preparations for oral administration include tablets, pills, granules, soft / hard capsules, powders, fine granules, powders, emulsions, suspensions, syrups, pellets, elixirs, etc. It is done. Examples of preparations for parenteral administration include injections, drops, infusions, ointments, lotions, tonics, sprays, suspensions, oils, emulsions, suppositories and the like. In order to formulate the active ingredient of the product of the present invention, conventional methods may be used, and surfactants, excipients, coloring agents, flavoring agents, preservatives, stabilizers, buffering agents, suspending agents, isotonic agents, etc. And other commonly used adjuvants are used as appropriate.
[0021]
【Example】
EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but these do not limit the present invention.
[0022]
Reference example 1
<Manufacture of ginkgo biloba extract>
Five times the amount of 80% by mass aqueous ethanol was added to the shredded ginkgo biloba leaves and extracted at 60 ° C. for 4 hours. The obtained extract was concentrated under reduced pressure to a volume of 1/5, and then filtered to remove impurities. This concentrate was sterilized at 80 ° C. for 30 minutes and then spray-dried with a spray dryer to obtain 2.5 kg of ginkgo biloba leaf extract dry powder.
[0023]
Example 1
Measurement of blood uric acid levels and blood pressure lowering effects in humans:
The effects of ginkgo biloba extract on blood uric acid level lowering and blood pressure lowering in humans were examined as follows.
[0024]
<Test method>
The test subjects were divided into two groups of 8 people per group as 16 adults who had a clinically healthy daily life with systolic blood pressure 140 mmHg or diastolic blood pressure 85 mmHg or more. This test subject was divided into two groups, and the ginkgo biloba extract beverage of the following composition, or a control beverage obtained by removing only the ginkgo biloba extract from this ginkgo biloba leaf extract beverage, was taken once a day for 12 weeks. It was. Before ingestion and at the end of ingestion, after 12 hours or more of fasting, blood was collected and the uric acid level was measured. In addition, we measured blood pressure with a mercury sphygmomanometer and a heart rate by a skilled public health nurse. Blood pressure was measured three times at a sitting position after resting for a minimum of 5 minutes. For each blood pressure, an average of three times was adopted.
[0025]
(Prescription) (g)
Ginkgo biloba extract * 0.04
Carbohydrate 16.6
Sodium 0.011
Kukosi extract appropriate amount licorice extract appropriate amount litchi extract appropriate amount plum extract appropriate amount *: manufactured in Reference Example 1.
[0026]
<Evaluation method>
The antihypertensive effect was evaluated based on the antihypertensive examination criteria in the “Guidelines for Clinical Evaluation Methods for Antihypertensive Drugs” by comparing the difference between systolic blood pressure, diastolic blood pressure, and average blood pressure 12 weeks after ingestion. (New Drug Clinical Evaluation Guidelines, Yakuji Nipposha, pages 308-332, 1994). The determination of the antihypertensive level was made by classifying the antihypertensive level into four stages, and when the classification based on systole and the classification based on diastole did not match, classification based on mean blood pressure was used.
[0027]
All results showed mean ± standard error. A t-test was used to test the difference between the average values of both groups. Furthermore, with respect to the change over time, a paired t-test was used and compared with that before ingestion. In each statistical process, the significance level was set to 5% or less, and a two-sided test was performed.
[0028]
<Test results>
Although no change was observed in the uric acid level of the control beverage group, the uric acid level after 12 weeks of ingestion in the ginkgo biloba extract beverage group was significantly lower than that before ingestion. Furthermore, comparing the uric acid value of the control beverage group 12 weeks after ingestion with the uric acid value of the Ginkgo biloba extract beverage group, the uric acid value of the Ginkgo biloba leaf extract beverage group was significantly low.
[0029]
[Table 1]
Figure 0004577998
[0030]
Differences in systolic blood pressure, diastolic blood pressure, and average blood pressure before and after 12 weeks of intake were compared, and the effectiveness of the ginkgo biloba extract beverage was evaluated based on the antihypertensive examination criteria. When a person who showed a downward or downward trend was validated and its value was calculated, the value of the Ginkgo biloba extract beverage group was as high as 75% compared to 25% of the control beverage group.
[0031]
[Table 2]
Figure 0004577998
[0032]
Example 2
Soft drink production:
According to the following formulation, each component was blended according to a conventional method and homogenized to obtain a soft drink.
The obtained soft drink was filled in a brown bottle, sealed with an aluminum cap, and heat-treated. These had good appearance and flavor.
[0033]
(Prescription) (g)
Ginkgo biloba extract * 0.8
Perfume 0.8
Water 55.32
Reduced starch saccharified product 24
Fructose 18
Kukosi extract 0.1
Licorice extract 0.1
Ganoderma Extract 0.1
Plum extract 0.1
Citric acid 0.3
*: Manufactured in Reference Example 1.
[0034]
Example 3
Tablet production:
Various ingredients were mixed according to the following formulation, granulated, dried and sized, and then tableted to produce tablets.
[0035]
(Prescription) (mg)
Ginkgo biloba extract * 40
Microcrystalline cellulose 100
Lactose 80
Magnesium stearate 0.5
Methylcellulose 12
Talcum powder 5
*: Manufactured in Reference Example 1.
[0036]
【The invention's effect】
A uric acid level-lowering agent comprising the ginkgo biloba extract of the present invention as an active ingredient and a food and drink containing the reducing agent correct hyperuricemia, and thus gout associated with hyperuricemia, arteriosclerosis, myocardial infarction, It can be effectively used for prevention or treatment of renal failure, hypertension and the like.
more than

Claims (3)

イチョウ葉抽出物を有効成分とする尿酸値低下剤。  A uric acid level reducing agent containing ginkgo biloba extract as an active ingredient. イチョウ葉抽出物が、イチョウ葉を3〜10倍量の含水アルコールで抽出することにより得られたものである請求項1記載の尿酸値低下剤。The uric acid level-lowering agent according to claim 1, wherein the ginkgo biloba extract is obtained by extracting ginkgo biloba leaves with 3 to 10 times the amount of hydrous alcohol. 含水アルコールが、70〜90質量%の水性エタノールである請求項2記載の尿酸値低下剤。The uric acid level-lowering agent according to claim 2, wherein the hydrous alcohol is 70 to 90% by mass of aqueous ethanol.
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