WO2010041746A1 - ピロリ菌増殖抑制剤 - Google Patents
ピロリ菌増殖抑制剤 Download PDFInfo
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- WO2010041746A1 WO2010041746A1 PCT/JP2009/067657 JP2009067657W WO2010041746A1 WO 2010041746 A1 WO2010041746 A1 WO 2010041746A1 JP 2009067657 W JP2009067657 W JP 2009067657W WO 2010041746 A1 WO2010041746 A1 WO 2010041746A1
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- Prior art keywords
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- pylori
- helicobacter pylori
- glcnac1
- growth
- Prior art date
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Classifications
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- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L29/00—Foods or foodstuffs containing additives; Preparation or treatment thereof
- A23L29/30—Foods or foodstuffs containing additives; Preparation or treatment thereof containing carbohydrate syrups; containing sugars; containing sugar alcohols, e.g. xylitol; containing starch hydrolysates, e.g. dextrin
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- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/125—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives containing carbohydrate syrups; containing sugars; containing sugar alcohols; containing starch hydrolysates
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
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- A—HUMAN NECESSITIES
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- A—HUMAN NECESSITIES
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- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/04—Drugs for disorders of the alimentary tract or the digestive system for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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Definitions
- the present invention relates to a H. pylori growth inhibitor containing an N-acetylglucosamine ⁇ -linked sugar derivative that suppresses the growth of H. pylori that causes peptic ulcer, gastric cancer and the like.
- Helicobacter pylori is a causative bacterium that causes peptic ulcer and chronic gastritis (Non-patent document 1, Non-patent document 2), and is estimated to be infected in half of the world population.
- Helicobacter pylori is inhabited in the surface mucus secreted from the surface layer of the gastric mucosa, but not in the glandular mucus secreted from the mucosa or the deep mucosa.
- This glandular mucus characteristically contains a GlcNAc ⁇ 1 ⁇ 4Gal ⁇ residue-containing O-glycan sugar chain having an N-acetylglucosamine ⁇ residue ( ⁇ GlcNAc residue) and a galactose residue (Gal residue). Therefore, it was suggested that this sugar chain may protect the gastric mucosa from infection with H. pylori.
- the present inventors have found that a glycoprotein sugar chain to which a core biantennary O-glucan having an ⁇ GlcNAc residue at the non-reducing end is bound suppresses the growth of Helicobacter pylori. It has been clarified that it is an enzyme activity inhibition of glucosylcholesterol synthase (CHL ⁇ GcT) (Non-patent Document 3) possessed only by H. pylori (Non-patent Document 4).
- CHL ⁇ GcT glucosylcholesterol synthase
- Non-patent Document 4 Non-patent Document 4
- Helicobacter pylori requires a glycosyl cholesterol component (CGL) for its growth, but because it cannot synthesize CGL itself, it ingests cholesterol from the outside world, adds glucose near the cell membrane of the fungus, and builds a cell wall.
- glycoprotein sugar chain of O-glycan having such ⁇ GlcNAc residue has the property of inhibiting the construction of this cell wall, and therefore it can be expected to be applied as a growth inhibitor specific for H. pylori. It is a complex, high-molecular-weight glycoprotein sugar chain, and it must be prepared through complicated multi-steps under uncontrollable reaction conditions, and requires huge costs and large-scale production facilities, which is not practical.
- Patent Document 1 discloses a Helicobacter pylori binding substance that is an oligosaccharide having a Gal ⁇ 3GlcNAc structure.
- this substance is a polysaccharide and has a complicated structure, it must be prepared through multiple steps, and it cannot be easily prepared in large quantities.
- the current treatment method for H. pylori infection is not based on these sugar chains, but is mainly sterilized by the combined use of one kind of proton pump inhibitor and two kinds of antibiotics.
- Three-drug combination therapy has a problem in that resistant bacteria appear and recur, or side effects appear.
- N-acetylglucosaminyl ⁇ -linked monosaccharide derivative has an excellent growth inhibitory effect against Helicobacter pylori and have already filed an application for Patent Document 2.
- the present invention was made to solve the above-mentioned problems, contains a compound that specifically inhibits the growth of Helicobacter pylori, does not give rise to resistant bacteria, and is safe to eat and drink for a long time,
- An object of the present invention is to provide a H. pylori growth inhibitor that can be easily produced in large quantities and can be used in foods and drinks and pharmaceutical preparations.
- the present inventors have found that the N-acetylglucosaminyl ⁇ -linked monosaccharide derivative has an even better H. pylori growth inhibitory effect than the N-acetylglucosaminyl ⁇ -linked monosaccharide derivative, The present invention has been completed.
- the H. pylori growth inhibitor which has been made to achieve the above object and is described in claim 1, has the following chemical formula (1): GlcNAc1- ⁇ -OY (1) (In the formula (1), Y represents an alkyl group, an alkoxyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, a heteroaryl group, a carboxyl group, or an alkoxycarbonyl group) It contains a minyl ⁇ -linked monosaccharide derivative.
- GlcNAc represents an N-acetylglucosaminyl group.
- the food and drink according to claim 2 is characterized by containing the H. pylori growth inhibitor according to claim 1.
- a pharmaceutical preparation according to claim 3 is characterized by containing the H. pylori growth inhibitor according to claim 1.
- the H. pylori growth inhibitor containing the N-acetylglucosaminyl ⁇ -linked monosaccharide derivative of the present invention inhibits the growth of H. pylori because the monosaccharide derivative inhibits glucosyl cholesterol synthase (CHL ⁇ GcT), It acts on the antibacterial. Even if this monosaccharide derivative is administered to humans, there is no fear of appearance of resistant bacteria as in the case of antibiotic administration. Since this monosaccharide derivative is a low molecular weight glucose derivative and does not have a complicated chemical structure, it can be easily produced and is suitable for mass industrial production.
- the H. pylori growth inhibitor containing the N-acetylglucosaminyl ⁇ -linked monosaccharide derivative has excellent anti-H. Pylori activity because this monosaccharide derivative inhibits the cell wall construction of H. pylori and suppresses the growth of H. pylori.
- the H-pylori growth inhibitor which uses this N-acetylglucosaminyl ⁇ -linked monosaccharide derivative alone or in combination with antibiotics, can completely remove H. pylori from the stomach, or develop chronic gastritis / peptic ulcer -It can prevent the recurrence of gastric diseases such as gastric cancer and gastric malignant lymphoma.
- N-acetylglucosaminyl ⁇ -linked monosaccharide derivative is present in the living body and specifically inhibits the growth of Helicobacter pylori, this growth inhibitor is highly safe for the human body. Is. Furthermore, N-acetylglucosaminyl ⁇ -linked monosaccharide derivatives, especially ethyl ⁇ -N-acetylglucosaminide (GlcNAc1- ⁇ -O-Et), are contained in yeast extracts that are widely used as food additives. It has been confirmed that it is a safe food material based on eating experience, and can be used for products that are eaten and taken repeatedly for a long period of time with peace of mind.
- GlcNAc1- ⁇ -O-Et ethyl ⁇ -N-acetylglucosaminide
- the food and drink containing the H. pylori growth inhibitor of the present invention is useful for reducing, curing or preventing stomach diseases. Since the N-acetylglucosaminyl ⁇ -linked monosaccharide derivative exhibits a strong H. pylori growth inhibitory action, an excellent anti-H. Pylori action can be obtained just by adding a small amount of H. pylori growth inhibitor to foods and drinks.
- the pharmaceutical preparation containing the Helicobacter pylori growth inhibitor of the present invention is used for treatment, symptom relief, or prevention of gastric diseases such as chronic gastritis and gastric ulcers derived from Helicobacter pylori.
- gastric diseases such as chronic gastritis and gastric ulcers derived from Helicobacter pylori.
- this N-acetylglucosaminyl ⁇ -linked monosaccharide derivative expresses a strong H. pylori growth inhibitory action, it exhibits an excellent anti-H. Pylori action just by taking a small amount of this pharmaceutical preparation, no side effects appear, Useful for healing gastric diseases with medical treatment.
- FIG. 2 is a graph showing the anti-H. Pylori action of a H. pylori growth inhibitor containing an N-acetylglucosaminyl ⁇ -linked monosaccharide derivative (GlcNAc1- ⁇ -O-Et) to which the present invention is applied. It is a graph which shows the anti- H. pylori action by N-acetylglucosamine (GlcNAc) of the application outside the present invention. It is a graph which shows the anti- H. pylori effect
- FIG. 2 is a graph showing the anti-pylori action of an N-acetylglucosaminyl ⁇ -linked monosaccharide derivative (GlcNAc1- ⁇ -O-Et) outside the scope of the present invention.
- 4 is a graph showing changes in body weight of gerbils with and without administration of an N-acetylglucosaminyl ⁇ -linked monosaccharide derivative (GlcNAc1- ⁇ -O-Et) not applied to the present invention.
- FIG. 6 is a graph showing the number of Helicobacter pylori colonies caused by the stomach of a gerbil with or without administration of an N-acetylglucosaminyl ⁇ -linked monosaccharide derivative (GlcNAc1- ⁇ -O-Et) not applied to the present invention.
- the H. pylori growth inhibitor of the present invention contains an N-acetylglucosaminyl ⁇ -linked monosaccharide derivative and is an active ingredient in food additives and pharmaceutical preparations.
- This N-acetylglucosaminyl ⁇ -linked monosaccharide derivative is represented by GlcNAc1- ⁇ -O—Y as shown in the above formula (1), and Y is an alkyl group, alkoxyl group, alkenyl group having 1 to 27 carbon atoms, An alkynyl group, an aralkyl group such as benzyl, an aryl group such as phenyl, a heteroaryl group, a carboxyl group, an alkoxycarbonyl group, a cholesterol group, and the like, and an N-acetylglucosaminyl (GlcNAc) group is ⁇ Has a combined structure.
- the Helicobacter pylori growth inhibitor is an ethyl group-containing compound (GlcNAc1- ⁇ -O-Et) (Iwahara S, et al., Bioscience, biotechnology, which has been reported to exist in yeast extract as a food additive. Technology, and biochemistry (Bioscience, Biotechnology, and Biochemistry), 1993, Vol. 57, No. 10, p. 1779-1780) are preferred.
- N-acetylglucosamine ⁇ -linked monosaccharide derivatives such as GlcNAc1- ⁇ -O-Et alone have an excellent growth inhibitory effect against H. pylori.
- a culture solution having a concentration of 5 mM or more of this monosaccharide derivative coexists with H. pylori, growth of H. pylori is suppressed to 50% or less.
- growth is suppressed to 5% or less.
- This monosaccharide derivative is stable in the culture solution and does not decompose for several hours even in the stomach.
- this N-acetylglucosaminyl ⁇ -linked monosaccharide derivative can be easily obtained by a one-step synthesis method, so that it can be produced on a large scale. Is possible.
- this monosaccharide derivative is an aliphatic hydrocarbon group-substituted product of N-acetylglucosaminyl and is particularly stable because the substitution site is an ether bond.
- this aliphatic hydrocarbon group such as an alkyl group is a very safe residue. Since this monosaccharide derivative has no residues harmful to the human body, its safety is particularly high and it can be included in foods and drinks and pharmaceutical preparations.
- N-acetylglucosaminyl ⁇ -linked monosaccharide derivatives are used as H. pylori growth inhibitors. These sugar derivatives may be used singly or in combination, and one of proton pump inhibitors such as lansoprazole and omeprazole and antibiotics such as amoxicillin and clarithromycin. Two types may be used in combination.
- the H. pylori growth inhibitor containing these N-acetylglucosaminyl ⁇ -linked monosaccharide derivatives is used as a food and drink additive to be added to food and drink.
- the food and drink include foods such as dairy products such as yogurt and beverages such as water, cocoa and juice.
- the food or drink preferably contains 0.02 to 1%, preferably 0.1 to 1%, of an N-acetylglucosaminyl ⁇ -linked monosaccharide derivative as an active ingredient for inhibiting H. pylori growth.
- These foods and drinks are more preferably taken continuously, since the effect of suppressing the growth of Helicobacter pylori is enhanced and digestive diseases such as gastric diseases such as chronic gastritis can be prevented.
- This H. pylori growth inhibitor is also used as a medicinal ingredient to be contained in a pharmaceutical preparation.
- the pharmaceutical preparation may be a tablet, capsule, granule, pill, emulsion, powder, syrup, solution, or injection.
- Such pharmaceutical preparations may contain pharmaceutical ingredients such as excipients, distilled water and physiological saline, and other pharmaceutical ingredients. It is more preferable to take these pharmaceutical preparations once or continuously, since the effect of suppressing the growth of Helicobacter pylori is enhanced and digestive diseases such as gastric diseases such as chronic gastritis can be cured or alleviated.
- the following is an example of synthesizing the N-acetylglucosaminyl ⁇ -linked sugar derivative of the present invention and preparing a Helicobacter pylori growth inhibitor and the like.
- Example 1 (1.1 Chemical synthesis of GlcNAc1- ⁇ -O-Et (2)) Ethoxy 2-acetamido-2-deoxy-N-acetyl- ⁇ -D-glucosaminide (GlcNAc1- ⁇ -O) which is an example of the N-acetylglucosaminyl ⁇ -linked monosaccharide derivative of the chemical formula (1) to which the present invention is applied -Et (2)) will be described in detail. This derivative is synthesized as shown in chemical reaction formula (3) below.
- N-acetyl-D-glucosamine (3.0131 g, 13.62 mmol) was placed in a 200 ml eggplant type flask, dissolved in EtOH (50.0 ml) into which HCl gas was blown, and a calcium chloride tube was attached and stirred at room temperature.
- the reaction was confirmed by thin layer chromatography (TLC) (developing solvent: chloroform / methanol (3: 1)). After 17 hours, NaHCO 3 was added for neutralization, and then the inorganic substance was filtered through Celite. After concentration, pink crystals were precipitated. This was separated by flash silica gel column chromatography to obtain 2.4 g of ⁇ isomer and 0.6 g of ⁇ isomer as white crystals (yield: ⁇ isomer 75%, ⁇ isomer 19%).
- a Helicobacter pylori inhibitor containing this GlcNAc1- ⁇ -O-Et (2) was prepared, and its biological effectiveness was evaluated as follows.
- Example 2 (2.1 Preparation of H. pylori growth inhibitor containing GlcNAc1- ⁇ -O-Et (2) and confirmation of its anti-H. Pylori action: in vitro)
- the effect of GlcNAc1- ⁇ -O-Et on H. pylori was confirmed by the following procedure.
- Helicobacter pylori (ATCC 43504) cryopreserved in Brucella broth culture solution at ⁇ 80 ° C. was shaken in the same culture solution containing horse serum 10% (3 mL) at 35 ° C. and CO 2 15% for 40 hours. After observing the movement of the bacteria under a microscope, H. pylori which was a non-coccoid type was obtained.
- OD (absorbance) 600 nm was measured, diluted to 4 ⁇ 10 7 in Mueller Hinton culture solution containing horse serum 5.5%, and a total of 3 mL was shaken and cultured at 35 ° C. and CO 2 15% for 24 hours. It checked with the back microscope and it was set as the culture liquid containing the Helicobacter pylori used for the test for confirming the effect of the said compound (bacteria concentration; 2 * 10 ⁇ 7 > / mL).
- Mueller Hinton culture solutions containing 5% horse serum 6.25 mM, 12.5 mM, 25 mM, 50 mM and 100 mM of the above-mentioned GlcNAc1- ⁇ -O-Et and containing no H.
- pylori were prepared. After adding and mixing with each culture medium containing H. pylori at a volume ratio of 1: 1 (total volume 100 ⁇ L, on 96-well plate), the cells were cultured at 35 ° C. and CO 2 15% for 96 hours. After culturing for a certain period of time, the concentration of the proliferated bacteria was measured at OD 600 nm, and the growth control effect was estimated by comparing the addition of the compound with the negative control without addition of the compound (control: cont in FIG. 1).
- GlcNAc1- ⁇ -O-Et is a main body expressing the activity of inhibiting Helicobacter pylori growth, and its degradation product does not exhibit the activity of inhibiting Helicobacter pylori growth.
- Example 3 (3.1 Preparation of H. pylori growth inhibitor containing GlcNAc1- ⁇ -O-Et (2) and confirmation of its anti-H. Pylori action: in vivo)
- the antibacterial activity of GlcNAc derivatives against Helicobacter pylori was examined in vivo using a test system for oral infection of gerbils with Helicobacter pylori.
- test substance As a test substance, an N-acetylglucosamine derivative (GlcNAc1- ⁇ -O-Et) was used at a concentration shown in the following group constitution.
- Example 3 (Comparative Example 3) Instead of using 300 mg / kg / day of GlcNAc1- ⁇ -O-Et instead of 300 mg / kg / day of GlcNAc1- ⁇ -O-Et in Example 1 (see Table 1), In the same manner as in Example 2, the growth inhibitory effect, body weight change, general symptom observation, bacterial count measurement (number of colonies) were performed, and statistical processing was similarly performed. The result of the growth inhibitory effect is shown in FIG. 6, the result of the weight change is shown in FIG. 7, and the result of the bacterial count measurement is shown in FIG.
- GlcNAc1- ⁇ -O-Et showed almost no H. pylori growth inhibitory effect in vitro compared to GlcNAc1- ⁇ -O-Et. Further, as apparent from FIG. 7, no significant difference in body weight increase was observed between the H. pylori growth inhibitor-administered group containing GlcNAc1- ⁇ -O-Et and the non-administered control group. No abnormalities of general symptoms were observed. As is apparent from FIG.
- the Helicobacter pylori growth inhibitor can also be used as a food or drink or pharmaceutical preparation for inhibiting Helicobacter pylori growth.
- N-acetylglucosaminyl ⁇ -linked monosaccharide derivatives are completely different from conventional antibiotics and exhibit antibacterial activity against H. pylori by a mechanism that suppresses the proliferation activity essential for the growth of all H. pylori. Useful as a fungicide.
- the H. pylori growth inhibitor containing these sugar derivatives is useful as a supplement or a food or drink additive.
- the food / beverage products containing the Helicobacter pylori growth inhibitor are useful as a functional food / beverage product and a health food / beverage product.
- the pharmaceutical preparation containing the Helicobacter pylori growth inhibitor is useful as a medicine to reduce, cure or prevent gastrointestinal diseases caused by Helicobacter pylori, especially gastric diseases such as gastritis, gastric ulcer and duodenal ulcer. It is.
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Abstract
Description
GlcNAc1-β-O-Y ・・・(1)
(式(1)中、Yは、アルキル基、アルコキシル基、アルケニル基、アルキニル基、アラルキル基、アリール基、ヘテロアリール基、カルボキシル基、アルコキシカルボニル基を示す)で表されるN-アセチルグルコサミニルβ結合単糖誘導体を含有していることを特徴とする。
(1.1 GlcNAc1-β-O-Et(2)の化学合成)
本発明を適用する前記化学式(1)のN-アセチルグルコサミニルβ結合単糖誘導体の一例であるエトキシ2‐アセトアミド‐2-デオキシ-N-アセチル-β-D-グルコサミニド(GlcNAc1-β-O-Et(2))について詳細に説明する。この誘導体は、下記化学反応式(3)のようにして合成される。
GlcNAc1-β-O-Et(2)であるβ体生成物の確認は、600MHz-核磁気共鳴スペクトル法(NMR)にて行った。
13C-NMR(150MHz, D2O);δ 15.3(-CH2 CH3), 23.2(CH3CO), 56.7(C-2), 61.9(-CH2CH3), 67.3(C-6), 71.0(C-5), 75.1(C-3), 77.0(C-4), 101.8(C-1), 175.7(CH3 CO)
(2.1 GlcNAc1-β-O-Et(2)を含有するピロリ菌増殖抑制剤の調製、及びその抗ピロリ菌作用の確認:in vitro)
GlcNAc1-β-O-Etのピロリ菌への効果を以下の手順で確認した。-80℃でブルセラブロス培養液中に凍結保存されているピロリ菌(ATCC 43504)を、ウマ血清10%入り同培養液中(3mL)で35℃、CO215%で40時間震盪培養し、顕微鏡下で菌の動きを観察した後、非コッコイド型であるピロリ菌を得た。OD(吸光度)600nmを測定し、ウマ血清5.5%入りミューラーヒントン培養液に菌数4×107になるように希釈し、計3mLを35℃、CO215%で24時間震盪培養した後顕微鏡で確認し、上記化合物の効果を確認するための試験に用いるピロリ菌含有培養液(菌濃度;2×107/mL)とした。一方、上記のGlcNAc1-β-O-Etの6.25mM,12.5mM,25mM,50mM及び100mMのウマ血清5%入りであってピロリ菌を含有しないミューラーヒントン培養液をそれぞれ作製し、これらをそれぞれのピロリ菌含有培養液に体積比1:1(全容積100μL、96wellプレート上)で添加、混和した後、35℃、CO215%で、96時間培養した。一定時間培養後、増殖した菌の濃度をOD600nmで測定し、化合物を添加したものと、添加していないネガティブコントロール(図1中のコントロール:cont)とを比較し、増殖抑制効果を見積もった。
GlcNAc1-β-O-Etを用いた結果を図1に示す。図1から明らかな通り、GlcNAc1-β-O-Etを25~50mM以上添加した場合、ピロリ菌の増殖が50%以上阻害されることが示された。
培養開始から3日後のピロリ菌含有培養液に含まれているGlcNAc1-β-O-Etについて所定量を高速液体クロマトグラフィーで測定し、予め作成した所定量の各種濃度とそれの高速液体クロマトグラムの面積とによる検量線から、GlcNAc1-β-O-Etの濃度を換算した結果、GlcNAc1-β-O-Etの初期濃度の6%が消失していた。このことから、GlcNAc1-β-O-Etのうちの6%が、GlcNAcとエタノール(EtOH)とに分解したことが分かった。
GlcNAc1-β-O-Etの分解産物であるGlcNAcが、ピロリ菌の増殖抑制効果を有しないことを確認するため、実施例2のGlcNAc1-β-O-EtをGlcNAcに変更した以外は、実施例2と同様の手順でピロリ菌を培養した。一定時間培養後、増殖した菌の濃度をOD600nmで測定し、GlcNAcを添加したものと、添加していないネガティブコントロール(図2中のコントロール:cont)とを比較し、増殖抑制効果を見積もった。
GlcNAc1-β-O-Etの分解産物であるエタノールが、ピロリ菌の増殖抑制効果を有しないことを確認するため、実施例2のGlcNAc1-β-O-Etをエタノールの1.25容量%(214mM)、2.5容量%(428mM)、5容量%(856mM)に変更した以外は実施例2と同様の手順でピロリ菌を培養した。一定時間培養後、増殖した菌の濃度をOD600nmで測定し、エタノールを添加したものと、添加していないネガティブコントロール(図3中のコントロール:cont)とを比較し、増殖抑制効果を見積もった。
(3.1 GlcNAc1-β-O-Et(2)を含有するピロリ菌増殖抑制剤の調製、及びその抗ピロリ菌作用の確認:in vivo)
スナネズミのヘリコバクターピロリ菌経口感染の試験系を用い、GlcNAc誘導体のヘリコバクターピロリ菌に対する抗菌作用をin vivoで検討した。
九動吉冨(株)より4週齢で購入した雄性スナネズミ(SPF)を23日間予備飼育して実験に供した。スナネズミは予備飼育期間および実験期間を通して室温24±3℃、相対湿度55±15%の感染動物飼育室(照明時間7時~19時、換気回数18回/時)で飼育した。スナネズミは2~3匹/ケージとし、飲水は精製水を、飼料は粉末飼料(MF、オリエンタル酵母工業(株)製)を、それぞれ自由に与えた。また、スナネズミは色素(ピクリン酸溶液)塗布法で個体識別した。
感染菌株としてヘリコバクターピロリの標準菌株(ATCC 43504株)を使用した。保存菌株に10%ウマ血清(大日本住友製薬(株)製)を含むブレイン-ハートインフュージョン(BHI)培地(日水製薬(株)製)を加えて復元し、同培地中で37℃の微好気条件下(微好気培養装置使用)で3日間培養し、約5×106CFU/mlの濃度とした。
ヘリコバクターピロリ感染の24時間前より感染4時間後まで絶食した。この絶食したスナネズミにヘリコバクターピロリ培養液の1.0ml(目標)を経口投与した(5×106CFU/animal目標)。なお、感染日を第0日とする。
被験物質としてN-アセチルグルコサミン誘導体(GlcNAc1-β-O-Et)を下記群構成に示した濃度で用いた。
動物数:10匹/群
投与方法:混餌
投与量:粉末飼料へ0.3%混合
(3.3(1) 体重)
感染日を第0日とし、第1,3,6,10,13,17,20,24および26日に、体重計で測定した。その結果を図4に示す。
一般症状の変化を毎日観察した。
各群10匹から胃を摘出しリン酸緩衝液(PBS-)5mlを含む遠心管に入れ、ポリトロンホモジナイザーで均質化した。そのホモジネート0.1mlをポアViヘリコ-S寒天培地(栄研化学(株)製)に塗抹し前培養と同様な37℃の微好気条件で7日間以上培養後、形成された紫色のコロニーを計数した。
体重およびコロニー数は群毎の平均値±標準誤差を算出した。対照群に対する各群の統計的有意差を検定するため、解析ソフト(エクセル統計2006,社会情報サービス)を用いBartlett検定で等分散性を確認した後、Dunnett法で各群を比較した。等分散性が確認できなかった場合は、値を対数変換して同様にDunnett法で各群を比較した。いずれの場合もp<0.05の場合を統計学的に有意であるとする。その結果を図5に示す。
ピロリ菌生育が環境に相当左右されることから、ピロリ菌増殖抑制剤投与群と、非投与である対照群との相対比較を行う必要がある。図4から明らかな通り、GlcNAc1-β-O-Et(2)を含有するピロリ菌増殖抑制剤投与群と、非投与である対照群とで、体重の増加に有意差は認められず、外見上の一般症状の異常も認められなかった。図5(a)から明らかな通り、図4の体重変化と表1の推定投与量から算出したGlcNAc1-β-O-Etの300mg/kg/dayに相当する一日当りの投与量20mg/dayが、対照群に比べ、ピロリ菌数を1/2~1/3に低減させていることを見出した。一方、同図(a)に示すように、各群で数匹の異常に高いピロリ残存菌数を持つ個体があったため、危険度は高いがこれらの値をはずれ値として考え、スミルノフ・グラブス検定によって、はずれ値を除外すると、図5(b)のようにGlcNAc1-β-O-Et(2)を含有するピロリ菌増殖抑制剤投与群が、対照群に比べて1/6に抑えていることがわかった。
実施例1のGlcNAc1-β-O-Etの投与量300mg/kg/day(表1参照)に代えて、GlcNAc1-α-O-Etを300、又は1000mg/kg/day用いたこと以外は、実施例2と同様にして、増殖抑制効果、体重変化、一般症状観察、菌数測定(コロニー数)を行い、同様に統計処理した。増殖抑制効果の結果を図6に示し、体重変化の結果を図7に示し、菌数測定の結果を図8に示す。
Claims (3)
- 下記化学式(1)
GlcNAc1-β-O-Y ・・・(1)
(式(1)中、Yは、アルキル基、アルコキシル基、アルケニル基、アルキニル基、アラルキル基、アリール基、ヘテロアリール基、カルボキシル基、アルコキシカルボニル基を示す)で表されるN-アセチルグルコサミニルβ結合単糖誘導体を含有していることを特徴とするピロリ菌増殖抑制剤。 - 請求項1に記載のピロリ菌増殖抑制剤を含んでいることを特徴とする飲食品。
- 請求項1に記載のピロリ菌増殖抑制剤を含んでいることを特徴とする医薬製剤。
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JP2010532975A JP5383692B2 (ja) | 2008-10-10 | 2009-10-09 | ピロリ菌増殖抑制剤 |
EP09819279.2A EP2345656B1 (en) | 2008-10-10 | 2009-10-09 | N-acetylglucosaminyl beta-linked monosaccharide derivative as a helicobacter pylori bacterium proliferation inhibitor |
US13/063,876 US20110237788A1 (en) | 2008-10-10 | 2009-10-09 | Helicobacter pylori bacterium proliferation inhibitor |
US13/737,609 US8859511B2 (en) | 2008-10-10 | 2013-01-09 | Proliferation inhibitor of Helicobacter pylori bacteria |
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US13/063,876 A-371-Of-International US20110237788A1 (en) | 2008-10-10 | 2009-10-09 | Helicobacter pylori bacterium proliferation inhibitor |
US13/737,609 Continuation US8859511B2 (en) | 2008-10-10 | 2013-01-09 | Proliferation inhibitor of Helicobacter pylori bacteria |
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EP (1) | EP2345656B1 (ja) |
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WO2008084561A1 (ja) * | 2007-01-12 | 2008-07-17 | Shinshu University | α-N-アセチルグルコサミニル結合単糖誘導体を含有するピロリ菌増殖抑制剤 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US2710807A (en) * | 1952-05-27 | 1955-06-14 | American Home Prod | Food products containing glucosides of nu-acetyl-d-glucosamine |
JP2003517015A (ja) * | 1999-12-15 | 2003-05-20 | アープラス シエンセ インベステ アーベー | ヘリコバクターピロリ結合性新規物質およびその用途 |
JP2007246426A (ja) * | 2006-03-15 | 2007-09-27 | Shinshu Univ | N−アセチルグルコサミンの誘導体を含有するピロリ菌増殖抑制剤 |
WO2008032817A1 (fr) * | 2006-09-14 | 2008-03-20 | Riken | Chaîne de sucre ayant une activité à l'encontre de l'helicobacter pylori |
WO2008084561A1 (ja) * | 2007-01-12 | 2008-07-17 | Shinshu University | α-N-アセチルグルコサミニル結合単糖誘導体を含有するピロリ菌増殖抑制剤 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US4152513A (en) | 1977-06-01 | 1979-05-01 | University Of Delaware | Preparation of alkyl glycosides of amino sugars |
WO1994003184A1 (en) | 1992-07-31 | 1994-02-17 | Neose Pharmaceuticals, Inc. | Compositions for treating and inhibiting gastric and duodenal ulcers |
AU9258798A (en) | 1997-08-08 | 1999-03-01 | Hoechst Marion Roussel Deutschland Gmbh | Substituted tetrahydropyrane derivatives, method for producing same, the ir use as medicine or diagnostic agent, as well as medicine containing same |
EP1531832B1 (en) * | 2002-06-28 | 2009-04-15 | Glykos Finland Oy | Therapeutic compositions for use in prophylaxis or treatment of diarrheas |
US7871793B2 (en) | 2004-02-20 | 2011-01-18 | Burnham Institute For Medical Research | Antimicrobial carbohydrates and methods of using same |
-
2009
- 2009-10-09 US US13/063,876 patent/US20110237788A1/en not_active Abandoned
- 2009-10-09 WO PCT/JP2009/067657 patent/WO2010041746A1/ja active Application Filing
- 2009-10-09 JP JP2010532975A patent/JP5383692B2/ja not_active Expired - Fee Related
- 2009-10-09 EP EP09819279.2A patent/EP2345656B1/en not_active Not-in-force
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2013
- 2013-01-09 US US13/737,609 patent/US8859511B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2710807A (en) * | 1952-05-27 | 1955-06-14 | American Home Prod | Food products containing glucosides of nu-acetyl-d-glucosamine |
JP2003517015A (ja) * | 1999-12-15 | 2003-05-20 | アープラス シエンセ インベステ アーベー | ヘリコバクターピロリ結合性新規物質およびその用途 |
JP2007246426A (ja) * | 2006-03-15 | 2007-09-27 | Shinshu Univ | N−アセチルグルコサミンの誘導体を含有するピロリ菌増殖抑制剤 |
WO2008032817A1 (fr) * | 2006-09-14 | 2008-03-20 | Riken | Chaîne de sucre ayant une activité à l'encontre de l'helicobacter pylori |
WO2008084561A1 (ja) * | 2007-01-12 | 2008-07-17 | Shinshu University | α-N-アセチルグルコサミニル結合単糖誘導体を含有するピロリ菌増殖抑制剤 |
Non-Patent Citations (3)
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IWAHARA, S. ET AL.: "Isolation and identification of ethyl-[-N-acetylglucosaminide from yeast extract", BIOSCI. BIOTECH. BIOCHEM., vol. 57, no. 10, 1993, pages 1779 - 17801, XP008146858 * |
KAWAGISHI, H. ET AL.: "A lectin from an edible mushroom Pleurotus ostreatus as a food intake- suppressing substance", BIOCHIM. BIOPHYS. ACTA, vol. 1474, 2000, pages 299 - 308, XP004276569 * |
MILLER-PODRAZA, H. ET AL.: "Novel binding epitope for Helicobacter pylori found in neolacto carbohydrate chains", J. BIOL. CHEM., vol. 280, no. 20, 2005, pages 19695 - 19703, XP008146821 * |
Also Published As
Publication number | Publication date |
---|---|
US8859511B2 (en) | 2014-10-14 |
JP5383692B2 (ja) | 2014-01-08 |
US20110237788A1 (en) | 2011-09-29 |
JPWO2010041746A1 (ja) | 2012-03-08 |
EP2345656A1 (en) | 2011-07-20 |
EP2345656B1 (en) | 2018-05-02 |
US20130131004A1 (en) | 2013-05-23 |
EP2345656A4 (en) | 2014-07-09 |
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