WO2017047706A1 - 血糖値上昇抑制剤及びこれを含んでなる経口組成物 - Google Patents
血糖値上昇抑制剤及びこれを含んでなる経口組成物 Download PDFInfo
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- WO2017047706A1 WO2017047706A1 PCT/JP2016/077303 JP2016077303W WO2017047706A1 WO 2017047706 A1 WO2017047706 A1 WO 2017047706A1 JP 2016077303 W JP2016077303 W JP 2016077303W WO 2017047706 A1 WO2017047706 A1 WO 2017047706A1
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- WIPO (PCT)
- Prior art keywords
- glucose
- branched
- glucan mixture
- glucan
- blood
- Prior art date
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Classifications
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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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/715—Polysaccharides, i.e. having more than five saccharide radicals attached to each other by glycosidic linkages; Derivatives thereof, e.g. ethers, esters
- A61K31/716—Glucans
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/163—Liquid or semi-liquid tea extract preparations, e.g. gels, liquid extracts in solid capsules
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/26—Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0053—Mouth and digestive tract, i.e. intraoral and peroral administration
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
- A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
Definitions
- the present invention relates to a blood sugar level increase inhibitor, and in particular, to a blood sugar level increase inhibitor that suppresses an increase in blood sugar level after ingesting a monosaccharide, and an oral composition containing the same.
- diabetes is likely to occur when a high blood glucose level is maintained, and in particular, it is important for prevention of diabetes to suppress an increase in blood glucose level immediately after taking food, so-called postprandial blood glucose level. is there.
- isomerized sugar a mixture of glucose and fructose obtained by isomerizing glucose, which is a kind of monosaccharide, has been widely used as a sweetener in various foods and drinks, and in particular, relatively large amounts for soft drinks and the like. Therefore, there are many opportunities to ingest monosaccharides through ingestion of beverages regardless of whether or not they are conscious.
- Monosaccharides such as glucose and fructose are easily absorbed when ingested, leading to an increase in blood sugar level. Therefore, suppressing the increase in blood sugar level after ingesting foods and drinks containing these monosaccharides from the viewpoint of preventing diabetes It is also important.
- Patent Document 1 discloses that ⁇ -1,3-1,4-glucan obtained from barley endosperm or the like suppresses an increase in blood glucose level during glucose load.
- Non-Patent Document 1 ⁇ -1,3-1,4-glucan is a human who exhibits abnormal glucose tolerance and is difficult to lower blood glucose level, ie, a so-called “human in the borderline of diabetes”
- Patent Document 2 discloses that when a rat is fed with high-purity D-psicose together with glucose, an increase in blood glucose level is suppressed.
- D-psicose itself has a sweet taste, when used in combination with a monosaccharide having a sweet taste, D-psicose can be used without any problem without affecting the taste.
- an indigestible dextrin (non-patent document 2), which is a kind of water-soluble dietary fiber obtained by processing a heated roasted dextrin after adding a small amount of an inorganic acid, is itself In addition to its low sweetness, it has the effect of suppressing postprandial blood glucose levels and mildly secreting insulin, so it is blended and used in many foods and drinks. As reported in Non-Patent Documents 3 and 4, it does not show an inhibitory effect on the increase in blood glucose level after monosaccharide intake.
- the present invention is not limited to “humans in the borderline of diabetes”, and has an effect of suppressing an increase in blood glucose level of humans after ingesting monosaccharides. It is an object of the present invention to provide a blood sugar level increase inhibitor that can be easily and safely ingested, and an oral composition comprising the same.
- the branched ⁇ -glucan mixture which has a branched structure of 1 degree or more and generates isomaltose by digestion with isomaltodextranase, not only suppresses the increase in postprandial blood glucose level, but also It has been found that the increase in blood glucose level is also suppressed.
- Such knowledge is completely unexpected. This is because the branched ⁇ -glucan mixture is a glucose polymer having a branch, and is a starch-derived mixture similar to indigestible dextrin in that it exhibits water-soluble dietary fiber properties. This is because, similarly to the indigestible dextrin reported in No.
- the present invention solves the above-mentioned problems by providing an agent for suppressing an increase in blood glucose level after ingestion of a monosaccharide, comprising a branched ⁇ -glucan mixture having the following characteristics (A) to (C) as an active ingredient: It is.
- Isomaltose is produced by isomalt dextranase digestion.
- the branched ⁇ -glucan mixture having the above characteristics is not only a safe edible material with no side effects, but also has a low sweetness or tastelessness, and suppresses an increase in human blood glucose level when taken with a monosaccharide. Has an effect. Therefore, the branched ⁇ -glucan mixture having the above characteristics (A) to (C) is extremely useful as an active ingredient of a blood sugar level increase inhibitor after taking a monosaccharide.
- this invention solves said subject by providing the oral composition which comprises a monosaccharide with the said blood glucose level raise inhibitor.
- the blood sugar level elevation inhibitor of the present invention itself has low sweetness or tastelessness, it can be used in a wide range and can suppress the blood sugar level rise after ingestion of monosaccharides as well as “humans in the borderline of diabetes”.
- the oral composition of the present invention contains the blood sugar level increase inhibitor of the present invention, by taking this, the increase in blood sugar level after ingesting monosaccharides can be effectively suppressed easily and safely. can do.
- FIG. It is a figure which shows the outline
- the present invention relates to a blood sugar level increase inhibitor comprising a branched ⁇ -glucan mixture having the following characteristics (A) to (C) as an active ingredient.
- A glucose as a constituent sugar
- B Linked to a non-reducing terminal glucose residue located at one end of a linear glucan having a degree of glucose polymerization of 3 or more linked via an ⁇ -1,4 bond via a bond other than an ⁇ -1,4 bond.
- Isomaltose is produced by isomalt dextranase digestion.
- a blood sugar level increase inhibitor means an agent that suppresses an increase in blood sugar level after human monosaccharide intake.
- ingestion means that a human takes in a body, and includes both ingestion by an oral route and ingestion by a tube route.
- the blood sugar level elevation inhibitor of the present invention is preferably taken at the same time as or after the monosaccharide.
- the blood glucose level elevation inhibitor of the present invention contains the above branched ⁇ -glucan mixture (hereinafter referred to as “the present branched ⁇ -glucan mixture”) as an active ingredient.
- the branched ⁇ -glucan mixture can be obtained by various production methods as described later, and the obtained branched ⁇ -glucan mixture usually has a number of branched ⁇ -having various branched structures and glucose polymerization degrees (molecular weights). -In the form of a mixture of glucans, it is impossible to isolate and quantify each branched ⁇ -glucan with the current technology.
- each branched ⁇ -glucan that is, the binding mode and order of binding of glucose residues as the constituent units cannot be determined for each branched ⁇ -glucan molecule
- the structure can be characterized as a whole mixture by various physical, chemical or enzymatic techniques commonly used in the art.
- the structure of the present branched ⁇ -glucan mixture is characterized by the characteristics (A) to (C) as a whole. That is, this branched ⁇ -glucan mixture is a glucan having glucose as a constituent sugar (feature (A)) and is connected to one end of a linear glucan having a glucose polymerization degree of 3 or more linked via ⁇ -1,4 bonds. It has a branched structure having a glucose polymerization degree of 1 or more linked to a non-reducing terminal glucose residue located through a bond other than an ⁇ -1,4 bond (feature (B)).
- non-reducing terminal glucose residue in the feature (B) means a glucose residue located at the terminal that does not exhibit reducing property among the glucan chains linked through ⁇ -1,4 bonds.
- the “bond other than ⁇ -1,4 bond” literally means a bond other than ⁇ -1,4 bond.
- this branched ⁇ -glucan mixture produces isomaltose by digestion with isomalt dextranase (feature (C)).
- the digestion with isomaltodextranase in the feature (C) means that isomaltdextranase is allowed to act on the branched ⁇ -glucan mixture to cause hydrolysis.
- Isomalt dextranase is an enzyme to which the enzyme number (EC) 3.2.1.94 is assigned, and ⁇ -1,2, ⁇ -1 adjacent to the reducing end of the isomaltose structure in ⁇ -glucan. , 3, ⁇ -1,4, and ⁇ -1,6 linkages, the enzyme has the characteristic of hydrolyzing.
- isomalt dextranase from Arthrobacter globiformis eg, Sawai et al., Agricultural and Biological Chemistry, Vol. 52, No. 2, No. 2) Pp. 495-501 (1988)).
- the ratio of isomaltose per solid in the digest produced by isomalt-dextranase digestion is the isomaltose structure that can be hydrolyzed with isomalt-dextranase in the structure of the branched ⁇ -glucan constituting the branched ⁇ -glucan mixture
- the structure of the branched ⁇ -glucan mixture as a whole can be characterized by an enzymatic method.
- isomaltose is digested with isomalt-dextranase, so that isomaltose is usually 5% by mass or more and 70% by mass or less, preferably 10% by mass or more and 60% by mass or less, Preferably, those produced by 20% by mass or more and 50% by mass or less are preferably used because they are considered to be superior in the effect of suppressing the increase in blood glucose level after ingesting monosaccharides.
- the branched ⁇ -glucan mixture has an inhibitory effect on the increase in blood glucose level after ingestion of monosaccharides.
- This branched ⁇ -glucan mixture generates isomaltose by digestion with isomaltdextranase. It is thought that having the That is, a branched ⁇ -glucan mixture having an isomaltose production amount of less than 5% by mass in digestion with isomaltodextranase has structural characteristics similar to maltodextrin having a small branched structure, and conversely, isomaltdextranase.
- a branched ⁇ -glucan mixture having an isomaltose production amount of more than 70% by mass in digestion has a structural feature close to that of dextran, which is a glucose polymer linked by ⁇ -1,6 bonds.
- dextran which is a glucose polymer linked by ⁇ -1,6 bonds.
- the present branched ⁇ -glucan mixture it has the feature (D) that the water-soluble dietary fiber content determined by high performance liquid chromatography (enzyme-HPLC method) is 40% by mass or more. Are listed.
- “High-performance liquid chromatographic method (enzyme-HPLC method)” (hereinafter simply referred to as “enzyme-HPLC method”) for determining water-soluble dietary fiber content is the nutrition labeling standard of the Ministry of Health and Welfare Notification No. 146 in May 1996. , "Methods for analysis of nutritional components, etc. (methods listed in the first column of the first column of the nutrition labeling standard)", the method described in "Food fiber”, the outline of which is described below. It is as follows.
- a sample for gel filtration chromatography is prepared by decomposing the sample by a series of enzyme treatments with heat-stable ⁇ -amylase, protease, and glucoamylase, and removing proteins, organic acids, and inorganic salts from the treatment solution with an ion exchange resin. Prepare the solution. Next, it is subjected to gel filtration chromatography, and the peak areas of undigested glucan and glucose in the chromatogram are obtained. The respective peak areas and glucose in the sample solution obtained separately by the glucose oxidase method by a conventional method are obtained. The amount is used to calculate the water soluble dietary fiber content of the sample.
- water-soluble dietary fiber content means the water-soluble dietary fiber content determined by the “enzyme-HPLC method” unless otherwise specified.
- the water-soluble dietary fiber content indicates the content of ⁇ -amylase and ⁇ -glucan that is not decomposed by glucoamylase, and the feature (D) shows that the structure of the branched ⁇ -glucan mixture as a whole is expressed by an enzymatic method. It is one of the indices that characterize.
- the structural feature that isomaltose is generated by digestion of isomaltdextranase is deeply involved in the effect of suppressing the increase in blood glucose level after monosaccharide intake by the branched ⁇ -glucan mixture. It is conceivable that this characteristic structural part is, of course, the higher the water-soluble dietary fiber content of the branched ⁇ -glucan mixture, in other words, the branched ⁇ that is not degraded by ⁇ -amylase and glucoamylase. -It is considered that the higher the content of glucan, the more it reaches the small intestine without being digested, and it shows an inhibitory effect on the increase in blood glucose level.
- a higher water-soluble dietary fiber content is preferable, and a suitable water-soluble dietary fiber content is usually 40% by mass or more. However, it is more preferably 60% by mass or more, and further preferably 75% by mass or more. There is no particular upper limit on the suitable water-soluble dietary fiber content, and the higher the technically possible value, the better, and preferably 100% by mass or less or less than 100% by mass.
- a more preferable embodiment of the present branched ⁇ -glucan mixture is a branched ⁇ -glucan mixture having the following features (E) and (F), which can be determined by methylation analysis.
- E the ratio of ⁇ -1,4 linked glucose residues to ⁇ -1,6 linked glucose residues is in the range of 1: 0.6 to 1: 4;
- F The sum of ⁇ -1,4-bonded glucose residues and ⁇ -1,6-bonded glucose residues accounts for 55% or more of all glucose residues.
- methylation analysis is a generally used method for determining the binding mode of monosaccharides constituting a polysaccharide or oligosaccharide (Ciucanu et al., Carbohydrate). -Research (Carbohydrate Research), Vol. 131, No. 2, pp. 209-217 (1984)).
- methylation analysis is applied to analysis of glucose binding mode in glucan, first, all free hydroxyl groups in glucose residues constituting glucan are methylated, and then fully methylated glucan is hydrolyzed.
- methylated glucose obtained by hydrolysis is reduced to form methylated glucitol from which the anomeric form has been eliminated, and further, a free hydroxyl group in this methylated glucitol is acetylated to give partially methylated glucitol acetate (note that , “Partially methylated glucitol acetate” is sometimes simply referred to as “partially methylated product”).
- Partially methylated glucitol acetate is sometimes simply referred to as “partially methylated product”.
- the abundance ratio of glucose residues having different binding modes in the glucan that is, the abundance ratio of each glucoside bond can be determined from the peak area%.
- “Ratio” for partially methylated product means “ratio” of peak area in gas chromatogram of methylation analysis
- “%” for partially methylated product means “area%” in gas chromatogram of methylated analysis.
- the “ ⁇ -1,4-bonded glucose residue” in the above (E) and (F) means the glucose residue bonded to other glucose residues only through the hydroxyl groups bonded to the 1st and 4th carbon atoms. It is detected as 2,3,6-trimethyl-1,4,5-triacetylglucitol in methylation analysis.
- the “ ⁇ -1,6-bonded glucose residue” in the above (E) and (F) is bonded to other glucose residues only through the hydroxyl groups bonded to the 1st and 6th carbon atoms. It is a glucose residue and is detected as 2,3,4-trimethyl-1,5,6-triacetylglucitol in methylation analysis.
- Ratio of ⁇ -1,4-bonded glucose residue and ⁇ -1,6-bonded glucose residue obtained by methylation analysis, and ⁇ -1,4-bonded glucose residue and ⁇ -1,6 bond The ratio of the glucose residues to the total glucose residues can be used as one of the indicators for characterizing the structure of the branched ⁇ -glucan mixture as a whole by chemical methods.
- the ratio of ⁇ -1,4-bonded glucose residues to ⁇ -1,6-bonded glucose residues is in the range of 1: 0.6 to 1: 4” 2,3,6-trimethyl-1,4,5-triacetylglucitol and 2,3,4-trimethyl-1,5,6 detected when the branched ⁇ -glucan mixture is subjected to methylation analysis Means that the ratio of triacetylglucitol is in the range of 1: 0.6 to 1: 4.
- the present branched ⁇ -glucan mixture corresponds to an “ ⁇ -1,6-linked glucose residue” that is not usually present in starch in a preferred embodiment.
- ⁇ -1,4 binding and ⁇ it preferably has ⁇ -1,3 bonds and ⁇ -1,3,6 bonds.
- ⁇ -1,3,6 bond means “residue of glucose that is bonded to other glucose ( ⁇ -1,3,6 bond) at three positions of hydroxyl groups at the 1-position, 3-position and 6-position”. Means "group”.
- ⁇ -1,3 bonds and ⁇ -1,3,6 bonds are contained in an arbitrary ratio in the bond. It is preferable that -1,3 bonded glucose residues are 0.5% or more and less than 10% of all glucose residues. In the branched ⁇ -glucan mixture, ⁇ -1,3,6-linked glucose residues are preferably 0.5% or more of the total glucose residues.
- ⁇ -1,3-linked glucose residues are 0.5% or more and less than 10% of all glucose residues.
- 2,4 , 6-trimethyl-1,3,5-triacetylglucitol can be confirmed by the presence of 0.5% to less than 10% of the partially methylated glucitol acetate.
- the fact that “the ⁇ -1,3,6-linked glucose residues are 0.5% or more of the total glucose residues” means that the branched ⁇ -glucan mixture is 2,4- This can be confirmed by the presence of dimethyl-1,3,5,6-tetraacetylglucitol in an amount of 0.5% to less than 10% of the partially methylated glucitol acetate.
- This branched ⁇ -glucan mixture can also be characterized by the weight average molecular weight (Mw) and the value (Mw / Mn) obtained by dividing the weight average molecular weight (Mw) by the number average molecular weight (Mn).
- the weight average molecular weight (Mw) and the number average molecular weight (Mn) can be determined using, for example, size exclusion chromatography.
- the average glucose polymerization degree of the branched ⁇ -glucan constituting the branched ⁇ -glucan mixture can be calculated based on the weight average molecular weight (Mw), the branched ⁇ -glucan mixture is characterized by the average glucose polymerization degree. It can also be attached.
- the average glucose polymerization degree can be determined by subtracting 18 from the weight average molecular weight (Mw) and dividing the result by 162, which is the amount of glucose residue.
- the branched ⁇ -glucan mixture used as an active ingredient of a blood sugar level increase inhibitor preferably has an average glucose polymerization of usually 8 to 500, preferably 15 to 400, more preferably 20 to 300.
- the branched ⁇ -glucan mixture exhibits the same properties as ordinary glucan in that the viscosity increases as the average glucose polymerization degree increases, and the viscosity decreases as the average glucose polymerization degree decreases. Therefore, according to the embodiment of the blood glucose level elevation inhibitor of the present invention, the present branched ⁇ -glucan mixture having an average glucose polymerization degree suitable for the required viscosity can be appropriately selected and used.
- Mw / Mn which is a value obtained by dividing the weight average molecular weight (Mw) by the number average molecular weight (Mn), is a variation in the degree of glucose polymerization of the branched ⁇ -glucan molecules constituting the branched ⁇ -glucan mixture that is closer to 1 Means small.
- the present branched ⁇ -glucan mixture used as an active ingredient of a blood glucose level increase inhibitor can be used without any problem as long as Mw / Mn is usually 20 or less, but preferably 10 or less, more preferably 5 or less. Is preferred. When it is desired to provide a branched ⁇ -glucan mixture having a specific glucose polymerization degree, it is preferable that Mw / Mn is closer to 1 and that the variation in glucose polymerization degree is small.
- the present branched ⁇ -glucan mixture may be produced by any method as long as it has the characteristics (A) to (C).
- a branched structure having a glucose polymerization degree of 1 or more linked to a non-reducing terminal glucose residue of a linear glucan having a glucose polymerization degree of 3 or more linked through an ⁇ -1,4 bond via an ⁇ -1,6 bond A branched ⁇ -glucan mixture obtained by allowing an enzyme having an action of introducing sucrose to act on starch can be suitably used in the practice of the present invention.
- WO2008 / 136331 examples thereof include branched ⁇ -glucan mixtures obtained by allowing ⁇ -glucosyltransferase disclosed in the pamphlet to act on starch.
- an amylase such as maltotetraose-producing amylase (EC 3.2.1.60) or a starch debranching enzyme such as isoamylase (EC 3.2.1.68) is used.
- the branched ⁇ -glucan mixture can be reduced in molecular weight, so that the molecular weight, glucose polymerization degree, etc. can be adjusted to a desired range.
- the degree of polymerization disclosed in cyclomaltodextrin glucanotransferase (EC 2.4.1.19), starch branching enzyme (EC 2.4.1.18), and JP-A No. 2014-054221.
- the branched ⁇ -glucan constituting this branched ⁇ -glucan mixture is obtained by using two or more ⁇ -1,4 glucans together with an enzyme having an activity of transferring ⁇ -1,6 to an internal glucose residue of starch. Furthermore, it can be highly branched to increase the water-soluble dietary fiber content of the branched ⁇ -glucan mixture.
- the branched ⁇ -glucan mixture thus obtained can be further treated with a saccharide hydrolase such as glucoamylase to further increase the water-soluble dietary fiber content, thereby producing a branched ⁇ -glucan mixture.
- a saccharide hydrolase such as glucoamylase
- the reducing power of the branched ⁇ -glucan mixture may be reduced by, for example, and it is optional to obtain a branched ⁇ -glucan mixture having a desired molecular weight by performing fractionation by size exclusion chromatography or the like. It is.
- the amount of the branched ⁇ -glucan mixture contained in the blood sugar level increase inhibitor of the present invention is particularly limited as long as it exerts the intended blood glucose level increase suppressing action when taken at the same time as or in parallel with the monosaccharide.
- the branched ⁇ -glucan mixture may be contained in an amount of 1 to 100% by mass, preferably 3 to 100% by mass, more preferably 5 to 100% by mass.
- the blood sugar level elevation inhibitor of the present invention includes, as necessary, water, minerals, flavoring agents, stabilizers, excipients, extenders, pH adjusters and the like.
- One or more selected components may be appropriately blended and used in a proportion of 0.01 to 50% by mass, preferably 0.1 to 40% by mass.
- the blood sugar level increase inhibitor of the present invention may be ingested in an amount that exerts the action effect of the blood sugar level increase inhibitor, and the intake amount is not particularly limited.
- the present branched ⁇ -glucan mixture as an active ingredient The intake is usually in the range of 0.5 to 100 g, preferably in the range of 1 to 50 g, more preferably in the range of 1.5 to 10 g, still more preferably in the range of 3 to 8 g per adult (60 kg body weight).
- the blood sugar level elevation inhibitor of the present invention may be taken as it is or after being dissolved in a beverage such as water, tea or coffee, or added to a food or beverage.
- the intake amount of the present branched ⁇ -glucan mixture as an active ingredient is in the range of 0.5 to 30% by mass, more preferably in the range of 5 to 15% by mass with respect to the total intake amount of monosaccharides.
- the blood sugar level elevation inhibitor of the present invention may be taken before and after the intake of food or beverage.
- the blood sugar level elevation inhibitor of the present invention is powder, granule, granule, liquid, paste, cream, tablet, capsule, caplet, soft capsule, tablet, rod, plate, block, pill , Solid, gel, jelly, gummy, wafer, biscuit, bowl, chewable, syrup, stick, etc.
- the blood sugar level elevation inhibitor of the present invention prevents or improves not only pharmaceutical products and quasi-drugs but also lifestyle-related diseases such as foods for specified health use, functional labeling foods, dietary supplements, and health foods. Can be added to foods and beverages taken for the purpose.
- foods and drinks to be blended include carbonated drinks, milk drinks, jelly drinks, sports drinks, vinegar drinks, soy milk drinks, iron-containing drinks, lactic acid bacteria drinks, green tea, tea, cocoa, coffee and other drinks, cooked rice, rice cake , Bread, noodles, soup, miso soup, yogurt and other foods, soft candy, hard candy, gummy, jelly, cookies, soft cookies, rice crackers, hail, fried, fertilizer, potatoes, bracken, manju, squid, potatoes, Yokan, water yokan, brocade, jelly, pectin jelly, castella, biscuits, crackers, pie, pudding, butter cream, custard cream, cream puff, waffle, sponge cake, hot cake, muffin, donut, chocolate, ganache, cereal bar, Chewing gum, caramel, nougat, flower Toast, peanut paste, fruit paste, jam, marmalade and other confectionery, ice cream, sorbet, gelato and other confectionery, as well as soy sauce, powdered soy sauce, miso, powdered mis
- the blood glucose level elevation inhibitor of the present invention is a solution, syrup, tube feeding, tablet, capsule, troche, sublingual, granule, powder for preventing or improving (treating) lifestyle-related diseases. It can also be incorporated into drugs in the form of powders, emulsions, sprays and the like. Furthermore, the blood sugar level elevation inhibitor of the present invention can also be blended in pet food, feed, and feed consumed by animals other than humans.
- the blood sugar level increase inhibitor of the present invention containing the present branched ⁇ -glucan mixture is not only used as a blood sugar level increase inhibitor as it is, but also in addition to the blood sugar level increase inhibitor of the present invention, in addition, a monosaccharide is added. Thus, it can be used as an oral composition. Since the oral composition of the present invention contains a blood sugar level increase inhibitor, even if a monosaccharide is contained in the oral composition, the blood sugar level after ingestion can be suppressed, so the blood sugar level is concerned about rising. Even humans have the advantage that they can be ingested without worrying about monosaccharides.
- the monosaccharides used in the oral composition of the present invention include monosaccharides having an action of increasing blood sugar levels after ingestion of monosaccharides in humans, and particularly monosaccharides mixed in foods and drinks such as glucose.
- the blood glucose level increase inhibitory effect of the blood glucose level increase inhibitor of the present invention is more preferably exhibited, which is preferable.
- the blood sugar level increase inhibitor of the present invention may be blended in an amount that exerts the action effect as a blood sugar level increase inhibitor, and the blending amount is not particularly limited.
- the total amount of monosaccharides contained in the oral composition is blended so that the branched ⁇ -glucan mixture as an active ingredient is in the range of 0.5 to 30% by mass, more preferably in the range of 5 to 15% by mass. Is preferred.
- the branched ⁇ -glucan mixture as an active ingredient is usually in the range of 0.5 to 100 g, preferably 1 to 50 g, more preferably 1.5 to 10 g per adult (60 kg body weight). It is suitable to be formulated so that it can be taken in the range, more preferably in the range of 3 to 8 g.
- the oral composition of the present invention further includes water, saline, sweeteners, proteins, peptides, polyphenols, minerals, antibacterial substances, enzymes, indigestible polysaccharides, coloring agents, and flavoring agents. , Paste, stabilizer, excipient, bulking agent, pH adjuster, etc., or 0.01 to 50% by weight, preferably 0. It can mix
- the oral composition of the present invention is powder, granular, granule, liquid, paste, cream, tablet, capsule, caplet, soft capsule, tablet, rod, plate, block, pill,
- a suitable form such as solid, gel, jelly, gummy, wafer, biscuit, bowl, chewable, syrup, and stick can be used.
- the oral composition of the present invention can be administered to the stomach or gastrointestinal tract by a parenteral administration method such as tube administration, if necessary.
- a concentrated crude enzyme solution of ⁇ -glucosyltransferase derived from FERM BP-10771) was added in an amount of 11.1 units per gram of the solid, and further allowed to act at 50 ° C. and pH 6.0 for 68 hours.
- the reaction solution is kept at 80 ° C. for 60 minutes, then cooled and filtered, and the filtrate obtained is decolorized with activated carbon, purified by desalting with H-type and OH-type ion resins, and concentrated.
- the branched ⁇ -glucan mixture produced by spray drying was used in Experiment 1 below.
- the obtained branched ⁇ -glucan mixture was added to the isomaltdextranase digestion test method, ⁇ -glucosidase and glucoamylase digestion test method described in paragraphs 0079 and 0080 of International Publication No. WO2008 / 136331, paragraph 0076.
- the following characteristics (a) to (c) were obtained.
- the branched ⁇ -glucan mixture had the following feature (d) in addition to the above features, and From the results of analysis by the methylation analysis method, it was found that the following characteristics (e) to (h) were obtained.
- the ⁇ -1,3-linked glucose residues were 2.1% of the total glucose residues.
- the ⁇ -1,3,6-linked glucose residues were 5.6% of the total glucose residues.
- the branched ⁇ -glucan mixture used in this experiment is a non-reducing terminal glucose residue of a linear glucan having a glucose polymerization degree of 3 or more and having glucose as a constituent sugar and linked via ⁇ -1,4 bonds.
- (A) to (C) are characterized by having a branched structure having a glucose polymerization degree of 1 or more linked to each other via bonds other than ⁇ -1,4 bonds, and generating isomaltose by digestion with isomaltodextranase. It was what had.
- the branched ⁇ -glucan mixture used in this experiment is characterized by producing isomaltose in an amount of 5% by mass or more and 70% by mass or less per digested solid by digestion with isomalt dextranase, and has a water-soluble dietary fiber content.
- the feature of the above (D) that it is 40% by mass or more, and the ratio of ⁇ -1,4-bonded glucose residue to ⁇ -1,6-bonded glucose residue is 1: 0.6 to 1: 4 (E) and (F), wherein the total of ⁇ -1,4-bonded glucose residues and ⁇ -1,6-bonded glucose residues occupies 55% or more of all glucose residues. It met.
- ⁇ -1,3 bonded glucose residues are in the range of 0.5% to less than 10% of all glucose residues, and ⁇ -1,3,6 bonded glucose residues are present.
- the group was in the range of 0.5% or more of the total glucose residues.
- ⁇ Experiment 1 glucose tolerance test> Control samples consisting of glucose only to 13 healthy male and female subjects whose fasting blood glucose level (blood glucose level before ingestion) is approximately 80-110 mg / dL, excluding those with a history of abnormal glucose metabolism such as diabetes An aqueous solution in which 50 g (see Table 1) was dissolved in water to make 200 mL was given and consumed within 5 minutes. Blood was collected from the subject's fingertips six times before ingestion and 30, 45, 60, 90, and 120 minutes after ingestion, and the test paper “Accu Check Aviva Trip F” (sold by Roche Diagnostics Inc.) and self-blood sugar The blood glucose level was measured using a measuring instrument “Accu Check Aviva Nano” (sold by Roche Diagnostics Inc.). As glucose, commercially available powdered glucose (trade name “Fuji Crister”, sold by Kato Chemical Co., Ltd.) was used.
- test sample 55 g test sample (see Table 1) containing a branched ⁇ -glucan mixture with glucose was dissolved in water to control the 13 subjects.
- the sample was ingested in the same manner as in the sample intake, and after ingestion, blood was collected in the same manner, and the change in blood glucose level was measured.
- indigestible dextrin which is widely used as a water-soluble dietary fiber material in this field, does not exhibit an inhibitory effect on the increase in blood glucose level after intake of glucose and fructose, which are monosaccharides.
- This branched ⁇ -glucan mixture and indigestible dextrin are branched glucose polymers, they are common in that they are starch-derived mixtures having water-soluble dietary fiber properties.
- the difference in the effect on the increase in blood glucose level is an extremely interesting finding that overturns the conventional common sense, and this branched ⁇ -glucan mixture is effective at least in suppressing glucose uptake in the living body. The effect is considered to be clearly different from that of indigestible dextrin.
- This branched ⁇ -glucan mixture contains a monosaccharide, which has been conventionally concerned about an increase in blood glucose level, because it has the effect of suppressing an increase in blood glucose level after ingesting glucose, which is a monosaccharide.
- a monosaccharide which has been conventionally concerned about an increase in blood glucose level, because it has the effect of suppressing an increase in blood glucose level after ingesting glucose, which is a monosaccharide.
- various foods and drinks containing monosaccharides such as glucose, fructose, and isomerized sugar as sweeteners
- the increase in blood glucose level after ingestion can be suppressed by incorporating this branched ⁇ -glucan mixture. I can expect to do it.
- this branched ⁇ -glucan mixture is used, the range of foods and drinks that can be ingested without fear of an increase in blood glucose level can be expanded.
- This branched ⁇ -glucan mixture can be used as a blood glucose level increase inhibitor. In the
- ⁇ Experiment 2 Mechanism of inhibitory action of blood glucose level increase after monosaccharide intake by branched ⁇ -glucan mixture-Test using rat inverted small intestine->
- the effect on glucose absorption in the small intestine was examined using the rat inverted small intestine.
- the indigestible dextrin a commercially available indigestible dextrin (trade name “Fibersol 2”, sold by Matsutani Chemical Co., Ltd.) was used. .
- the amount of the target substance in the test solution absorbed from the small intestinal mucosa and transferred to the serosa inside the sac is measured to evaluate the absorption.
- the primary reason for reversing the intestinal tract to leave the mucosa side is that the epithelial cells require a large amount of oxygen, which makes it easy to replenish.
- glucose absorption by the small intestine was measured over time in vitro.
- ⁇ Experiment 2-1 Preparation of rat inverted small intestine> Wistar rats (male, 7 weeks old, sold by Clea Japan Co., Ltd.) were purchased, bred and acclimatized with a standard diet for 1-3 weeks. Next, the rats were fasted for 4 hours, and then opened under a midline incision under somnopentyl anesthesia, and the small intestine was collected. A partial small intestine having a length of about 8 cm from a site of about 16 cm to 24 cm toward the lower side (ileum side) from the ligament-like structure tied to the wall (rear abdominal wall) was cut out and used for the test.
- a plastic 20 mL syringe barrel (symbol d in FIG. 2) is used as a container, a small gas exhaust hole (symbol b in FIG. 2) is provided in the upper portion of the syringe barrel d, and a gas reflux tube is provided at the lower end of the syringe barrel d. (Symbol h in FIG. 2) is attached.
- a hole in the center of the rubber plug (symbol a in FIG. 2), a plastic 1 mL chip (symbol c in FIG.
- KRB buffer Krebs-Ringer bicarbonate buffer
- Control group glucose only (180 mg / dL, 10 mM); Branched ⁇ -glucan mixture addition group: Branched ⁇ -glucan mixture (60 mg / dL) added to glucose (180 mg / dL, 10 mM); Indigestible dextrin added group: Added indigestible dextrin (60 mg / dL) to glucose (180 mg / dL, 10 mM); (2) 20 mL (symbol g in FIG. 2) of any of the above three kinds of test sample solutions is injected into a plastic 20 mL syringe (symbol d in FIG.
- Table 3 shows the results of measuring the glucose concentration on the serosa side over time in a glucose absorption test using the inverted small intestine.
- the serous glucose concentration was 31.5 ⁇ 10.9 mg / dL, 96. It reached 2 ⁇ 17.8 mg / dL, 155.2 ⁇ 23.0 mg / dL, 202.8 ⁇ 27.5 mg / dL, the glucose concentration increased over time, and the inverted small intestine absorbed glucose on the mucosa side , It was found that it was transferred to the serosa side.
- the glucose concentration on the serosa side was 13.3 ⁇ 6.6 mg / dL, 40.4 ⁇ at 30 minutes, 60 minutes, 90 minutes, and 120 minutes, respectively.
- the amount of buffer solution in the inverted small intestine after incubation for 120 minutes is not necessarily constant for each test, so the total glucose amount on the inverted small intestinal serosa side is calculated by multiplying the serous buffer volume at the end of the test by the glucose concentration. did.
- the total glucose levels in the inverted small intestine of the control group, the branched ⁇ -glucan mixture addition group, and the indigestible dextrin addition group were 1.15 ⁇ 0.27 mg, 0.47 ⁇ 0.34 mg, and 0, respectively.
- the amount of glucose absorbed was significantly less in the branched ⁇ -glucan mixture addition group than in the control group.
- the hardly digestible dextrin added group and the control group were not significantly different.
- the branched ⁇ -glucan mixture addition group had significantly less glucose absorption at 90 to 120 minutes after sugar loading than the control (glucose only) group and the indigestible dextrin addition group.
- the indigestible dextrin added group was not much different from the control group. From the above results, it was determined that the branched ⁇ -glucan mixture has an absorption inhibitory action on glucose in the small intestine, while the hardly digestible dextrin has no glucose absorption inhibitory action.
- a branched structure having a glucose polymerization degree of 1 or more linked to a non-reducing terminal glucose residue of a linear glucan having a glucose polymerization degree of 3 or more via a bond other than an ⁇ -1,4 bond, and isomaltdextran It has a structural feature that produces isomaltose by digestion, and more preferably has a structural feature that produces isomaltose by not less than 5% by mass and 70% by mass or less per digestive solid by digestion with isomalt-dextranase. It is presumed that this is necessary in order to exert its function.
- the branched ⁇ -glucan mixture with isomaltose production amount less than 5% by mass in the digestion with isomaltodextranase has a small effect on glucose uptake in the small intestine because it has a structure close to maltodextrin with little branching structure. Is done.
- a branched ⁇ -glucan mixture with an isomaltose production amount of more than 70% by mass in isomalt-dextranase digestion has a structure close to that of dextran, which is a glucose polymer linked by ⁇ -1,6 bonds. Since it becomes monotonous, it is estimated that the influence on glucose uptake in the small intestine is reduced.
- those having a water-soluble dietary fiber content of 40% by mass or more determined by high performance liquid chromatography are more preferable because they themselves are difficult to digest and absorb in the small intestine. It is estimated to be.
- indigestible dextrin did not inhibit glucose uptake in the small intestine. Although the indigestible dextrin has an inhibitory effect on the increase in blood glucose level after ingestion of saccharides higher than disaccharides, it does not exhibit an inhibitory effect on the increase in blood glucose level after ingestion of monosaccharides It is presumed that the indigestible dextrin inhibits glucose uptake in conjunction with the disaccharide-degrading enzyme.
- a branched ⁇ -glucan mixture powder was prepared according to the method described in Example 5 of the pamphlet of International Publication No. WO2008 / 136331.
- the obtained branched ⁇ -glucan mixture powder had the following characteristics (a) to (g).
- a branched structure having a glucose polymerization degree of 1 or more (C) Isomaltose is digested to produce 35% by mass of isomaltose per digest solids, (D) the water-soluble dietary fiber content is 80.8% by mass, (E) the ratio of ⁇ -1,4 linked glucose residues to ⁇ -1,6 linked glucose residues is 1: 2.2; (F) the sum of ⁇ -1,4 linked glucose residues and ⁇ -1,6 linked glucose residues is 72.9% of the total glucose residues; (G) Average glucose polymerization degree is 31 and Mw / Mn is 2.0.
- This product can be used as an active ingredient of a blood sugar level increase inhibitor.
- This product is usually in the range of about 0.5 to about 100 g per adult (60 kg body weight) and can be taken as it is or dissolved in water, tea, coffee or other beverages, or food. Or what is necessary is just to add and ingest in a drink. Of course, this product may be taken before and after the intake of food or beverage.
- the product itself is tasteless, has no off-flavor, is stable for over a year without moisture absorption or discoloration even at room temperature.
- branched ⁇ -glucan mixture solution having a solid content of 30% by mass is prepared, and then spray-dried according to a conventional method to branch ⁇ -glucan.
- a mixture powder was obtained.
- the obtained branched ⁇ -glucan mixture powder had the following characteristics (a) to (g).
- a branched structure having a glucose polymerization degree of 1 or more (C) Isomaltose is digested to produce 27.2% by mass of isomaltose per digest solids, (D) the water-soluble dietary fiber content is 41.8% by mass, (E) the ratio of ⁇ -1,4 linked glucose residues to ⁇ -1,6 linked glucose residues is 1: 0.6; (F) the sum of ⁇ -1,4 linked glucose residues and ⁇ -1,6 linked glucose residues is 83.0% of the total glucose residues; (G) The average degree of glucose polymerization is 405, and Mw / Mn is 16.2.
- This product can be used as an active ingredient of a blood sugar level increase inhibitor.
- This product is usually in the range of about 0.5 to about 100 g per adult (60 kg body weight) and can be taken as it is or dissolved in water, tea, coffee or other beverages, or food. Or what is necessary is just to add and ingest in a drink. Of course, this product may be taken before and after the intake of food or beverage.
- the product itself is tasteless, has no off-flavor, is stable for over a year without moisture absorption or discoloration even at room temperature.
- a branched ⁇ -glucan mixture powder was prepared according to the method described in Example 6 of International Publication No. WO2008 / 136331.
- the obtained branched ⁇ -glucan mixture powder had the characteristics (a) to (g).
- a branched structure having a glucose polymerization degree of 1 or more (C) Isomaltose is digested to produce 40.6% by mass of isomaltose per digest of solid, (D) the water-soluble dietary fiber content is 77.0% by mass, (E) the ratio of ⁇ -1,4 linked glucose residues to ⁇ -1,6 linked glucose residues is 1: 4; (F) the sum of ⁇ -1,4 linked glucose residues and ⁇ -1,6 linked glucose residues is 67.9% of the total glucose residues; (G) The average degree of polymerization of glucose is 18, and Mw / Mn is 2.0.
- This product can be used as an active ingredient of a blood sugar level increase inhibitor.
- This product is usually in the range of about 0.5 to about 100 g per adult (60 kg body weight) and can be taken as it is or dissolved in water, tea, coffee or other beverages, or food. Or what is necessary is just to add and ingest in a drink. Of course, this product may be taken before and after the intake of food or beverage.
- the product itself is tasteless, has no off-flavor, is stable for over a year without moisture absorption or discoloration even at room temperature.
- ⁇ Antiglycemic inhibitor> A branched ⁇ -glucan mixture powder according to the method described in Example 5 of International Publication No. WO2008 / 136331 except that 2 units of maltotetraose-producing amylase per gram of solid was added to the corn starch liquor. was prepared.
- the obtained branched ⁇ -glucan mixture powder had the characteristics (a) to (g).
- a branched structure having a glucose polymerization degree of 1 or more (C) Isomaltose is digested to produce 41.9% by weight of isomaltose per solid of the digested product, (D) the water-soluble dietary fiber content is 69.1% by weight, (E) the ratio of ⁇ -1,4 linked glucose residues to ⁇ -1,6 linked glucose residues is 1: 2.4; (F) the sum of ⁇ -1,4 linked glucose residues and ⁇ -1,6 linked glucose residues is 64.2% of the total glucose residues; (G) Average glucose polymerization degree is 13 and Mw / Mn is 2.0.
- This product can be used as an active ingredient of a blood sugar level increase inhibitor.
- This product is usually in the range of about 0.5 to about 100 g per adult (60 kg body weight) and can be taken as it is or dissolved in water, tea, coffee or other beverages, or food. Or what is necessary is just to add and ingest in a drink. Of course, this product may be taken before and after the intake of food or beverage.
- the product itself is tasteless, has no off-flavor, is stable for over a year without moisture absorption or discoloration even at room temperature.
- ⁇ Antiglycemic inhibitor> Amiloglucosidase (glucoamylase) was allowed to act on the branched ⁇ -glucan mixture obtained by the method described in Example 1, and components that were not decomposed were fractionated using gel filtration chromatography. Thereafter, it was purified and spray-dried according to a conventional method to prepare a branched ⁇ -glucan mixture powder.
- the obtained branched ⁇ -glucan mixture had the characteristics (a) to (g).
- a branched structure having a glucose polymerization degree of 1 or more (C) Isomaltose is produced by digestion with isomaltodextranase to produce 21% by mass of isomaltose per solid of the digested product, (D) the water-soluble dietary fiber content is 94.4% by mass, (E) the ratio of ⁇ -1,4 linked glucose residues to ⁇ -1,6 linked glucose residues is 1: 1.9; (F) the sum of ⁇ -1,4 linked glucose residues and ⁇ -1,6 linked glucose residues is 64% of the total glucose residues; (G) Glucose polymerization degree is 22 and Mw / Mn is 1.7.
- This product can be used as an active ingredient of a blood sugar level increase inhibitor.
- This product is usually in the range of about 0.5 to about 100 g per adult (60 kg body weight) and can be taken as it is or dissolved in water, tea, coffee or other beverages, or food. Or what is necessary is just to add and ingest in a drink. Of course, this product may be taken before and after the intake of food or beverage.
- the product itself is tasteless, has no off-flavor, is stable for over a year without moisture absorption or discoloration even at room temperature.
- This product is a powdered juice that contains monosaccharides but contains a branched ⁇ -glucan mixture as a blood glucose level increase inhibitor, and can suppress an increase in blood glucose level when ingested.
- this product has no off-flavors and off-flavors, and has high commercial value as a juice.
- ⁇ Oral composition (custard cream)> 100 parts by mass of corn starch, 30 parts by mass of the branched ⁇ -glucan mixture powder obtained by the method described in Example 4, 70 parts by mass of hydrous crystals of trehalose, 40 parts by mass of glucose, and 1 part by mass of sodium chloride were mixed thoroughly.
- This product is a custard cream containing monosaccharides, disaccharides and polysaccharides.
- This product is a custard cream that contains monosaccharides, disaccharides, and polysaccharides but contains a branched ⁇ -glucan mixture as an inhibitor of blood glucose level rise, so it can suppress the increase in blood glucose level when ingested. . Moreover, this product is a high-quality custard cream having a smooth luster, good flavor, and high quality.
- a granulation adjustment liquid is sprayed little by little from the tip of the nozzle where the granulation powder is mixed in the apparatus to granulate, and nitrogen gas is added to the aluminum bag so that it becomes 5.15 g per pack or 10.3 g per pack. Filled.
- This product is a dietary supplement containing monosaccharides.
- This product is a dietary supplement that contains a monosaccharide but contains a branched ⁇ -glucan mixture as a blood glucose level increase inhibitor, and can suppress an increase in blood glucose level when ingested.
- this product has no off-flavors and off-flavors and has high commercial value as a dietary supplement.
- a sensory evaluation was conducted by 10 men and women in their 20s and 50s, and it was found that they had the effect of masking the bitterness and astringency unique to polyphenols contained in tea beverages. Furthermore, it was found that the black tea beverages A, B and C of the present invention suppressed the cream-down phenomenon (a phenomenon of becoming cloudy when the tea was gradually cooled) even when stored at room temperature.
- This product is a tea beverage containing monosaccharides. Although this product contains a monosaccharide, it contains a branched ⁇ -glucan mixture as a blood glucose level increase inhibitor, so it is a tea beverage that can suppress an increase in blood glucose level when ingested. In addition, this product has no off-flavor and off-flavor, and has a high commercial value as a tea beverage.
- the present branched ⁇ -glucan mixture itself, which is an active ingredient, has low sweetness or tastelessness.
- the range is wide, and it is possible to obtain an advantage that an increase in blood glucose level after ingestion of monosaccharides can be suppressed without being limited to “a human in a diabetic border region”.
- the oral composition of this invention contains the blood glucose level rise inhibitor of this invention with a monosaccharide, even if it ingests, it has the advantage that it is not necessary to worry about a raise of a blood glucose level. .
- the present invention is a truly significant invention that makes a great contribution to the world.
- FIG. ⁇ Mean value of increase in blood glucose level when a control sample consisting of glucose alone is taken ( ⁇ blood glucose)
- ⁇ Average increase in blood glucose level when taking a test sample containing a branched ⁇ -glucan mixture with glucose ( ⁇ blood glucose)
- a Rubber stopper b: Small hole for exhaust
- c Plastic 1 mL chip with cut tip
- d Plastic 20 mL syringe barrel
- e Inverted small intestine
- f Serosa buffer solution
- g Mucosal buffer solution
- h 95% O 2 -5% CO 2 gas reflux tube
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Abstract
Description
(A)グルコースを構成糖とし、
(B)α-1,4結合を介して連結したグルコース重合度3以上の直鎖状グルカンの一端に位置する非還元末端グルコース残基にα-1,4結合以外の結合を介して連結したグルコース重合度1以上の分岐構造を有し、
(C)イソマルトデキストラナーゼ消化により、イソマルトースを生成する。
(A)グルコースを構成糖とし、
(B)α-1,4結合を介して連結したグルコース重合度3以上の直鎖状グルカンの一端に位置する非還元末端グルコース残基にα-1,4結合以外の結合を介して連結したグルコース重合度1以上の分岐構造を有し、
(C)イソマルトデキストラナーゼ消化により、イソマルトースを生成する。
(E)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基の比が1:0.6乃至1:4の範囲にあり、
(F)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基との合計が全グルコース残基の55%以上を占める。
(a)グルコースを構成糖とし、
(b)α-1,4結合を介して連結したグルコース重合度3以上の直鎖状グルカンの一端に位置する非還元末端グルコース残基にα-1,4結合以外の結合を介して連結したグルコース重合度1以上の分岐構造を有し、
(c)イソマルトデキストラナーゼ消化により、イソマルトースを消化物の固形物当たり35質量%生成した。
(d)水溶性食物繊維含量が82.9質量%であり、
(e)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基の比が1:2.1であり、
(f)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基との合計が全グルコース残基の73.8%であった。
(g)α-1,3結合したグルコース残基が全グルコース残基の2.1%であった。
(h)α-1,3,6結合したグルコース残基が全グルコース残基の5.6%であった。
糖尿病などのグルコース代謝能異常の経歴のある者は除外した空腹時血糖値(摂取前の血糖値)がおおよそ80~110mg/dLである健康な男女13人の被験者に、グルコースのみからなる対照試料50g(表1を参照)を水に溶解し200mLにした水溶液を与え、5分以内に摂取させた。摂取前、摂取後30、45、60、90、120分の計6回、被験者の指先から採血し、試験紙『アキュチェックアビバストリップ F』(ロシュ・ダイアグノスティックス株式会社販売)と自己血糖測定器『アキュチェックアビバ ナノ』(ロシュ・ダイアグノスティックス株式会社販売)とを用いて血糖値を測定した。なお、グルコースとしては、市販の粉末グルコース(商品名『フジクリスター』、加藤化学株式会社販売)を用いた。
ヒトにおける本分岐α-グルカン混合物の血糖値上昇抑制作用のメカニズムを検証するため、ラット反転小腸を用いて、小腸でのグルコース吸収に与える影響を検討した。本分岐α-グルカン混合物としては実験1で用いたと同じ標品を用い、難消化性デキストリンとしては市販の難消化性デキストリン(商品名『ファイバーソル2』、松谷化学工業株式会社販売)を用いた。
Wistarラット(雄、7週齢、日本クレア株式会社販売)を購入し、1~3週間は標準飼料を与えて飼育し馴化させた。次いで、当該ラットを4時間絶食させた後、ソムノペンチル麻酔下に正中切開にて開腹して小腸を採取し、採取したラット小腸のトライツ(Treitz)靭帯(小腸の途中にあり、小腸を背中側の壁(後腹壁)に繋ぎ止めている靭帯様の構造)より下部側(回腸側)に向かって約16cmから24cmの部位までの長さ約8cmの部分小腸を切り出し、試験に用いた。
ラット反転小腸を用いたグルコース吸収試験は、図2に示す試験装置を作製し、下記の手順にしたがって実施した。
以下、試験装置の概要について、図2に基づき説明する。プラスチック製20mL容注射筒(図2の符号d)を容器として用い、注射筒dの上部にガス排気用小孔(図2の符号b)を設け、注射筒dの下端にはガス還流用チューブ(図2の符号h)を装着する。ゴム栓(図2の符号a)の中央部に孔をあけ、先を切断したプラスチック製1mLチップ(図2の符号c)を差し込み、当該チップcの先には一端を結紮した反転小腸(図2の符号e)を装着し結紮する。これを注射筒dの上端から差し込み、試験装置とする。
(1)グルコースのみ、グルコースと分岐α-グルカン混合物、又は、グルコースと難消化性デキストリンをクレブス-リンゲル重炭酸緩衝液(pH7.4)(以下、「KRB緩衝液」と略称する。)にそれぞれ溶解し、下記3種の被験サンプル溶液を調製した。
対照群:グルコースのみ(180mg/dL,10mM);
分岐α-グルカン混合物添加群:グルコース(180mg/dL,10mM)に分岐α-グルカン混合物(60mg/dL)を添加;
難消化性デキストリン添加群:グルコース(180mg/dL,10mM)に難消化性デキストリン(60mg/dL)を添加;
(2)プラスチック製20mL容注射筒(図2の符号d)に、上記3種の被験サンプル溶液のいずれかを20mL(図2の符号g)注入し、37℃の恒温水槽に入れてガス還流用チューブ(図2の符号h)から、95%O2-5%CO2ガスを通気し、ガス還流を行う。
(3)実験2-1で取得したラット小腸の内部を、95%O2-5%CO2ガスを通気した冷KRB緩衝液で洗浄する。
(4)図示しない反転用棒を腸管の近位端に少し挿入し、反転用棒を小腸内に押し入れながら反転させ、反転小腸とする。
(5)反転用棒から外した反転小腸(図2の符号e)に、先を切断したプラスチック製1mLチップ(図2の符号c)を挿入・結紮することにより装着し、近位端から約5cmのところを結紮する。
(6)反転小腸eを装着したチップcを注射筒dの内部にセットし、マイクロピペットでチップcの上部より反転小腸漿膜側(反転小腸cの内側)にKRB緩衝液0.5mL(図2の符号f)を注入する。この時点で実験(インキュベーション)開始とした。なお、試験前及び試験中ともに、粘膜側(反転小腸cの外側)の被験サンプル溶液gには95%O2-5%CO2ガスを通気させた。
(7)粘膜側、漿膜側ともにインキュベート0、30、60、90、120分の時点で溶液各5μLをマイクロピペットでサンプリングし、グルコース定量キット(商品名『グルコースCIIテストワコー』、和光純薬工業株式会社販売)を用いてグルコースを定量した。
(8)各被験サンプル群ともそれぞれ6回試験し、データの検定は、Tukey-Kramer法にて行い比較した。危険率0.05未満で「有意差あり」とした。
国際公開第WO2008/136331号パンフレットの実施例5に記載された方法に従い、分岐α-グルカン混合物粉末を調製した。なお、得られた分岐α-グルカン混合物粉末は、以下の(a)乃至(g)の特徴を有していた。
(a)グルコースを構成糖とし、
(b)α-1,4結合を介して連結したグルコース重合度3以上の直鎖状グルカンの一端に位置する非還元末端グルコース残基にα-1,4結合以外の結合を介して連結したグルコース重合度1以上の分岐構造を有し、
(c)イソマルトデキストラナーゼ消化により、イソマルトースを消化物の固形物当たり35質量%生成し、
(d)水溶性食物繊維含量が80.8質量%であり、
(e)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基の比が1:2.2であり、
(f)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基との合計が全グルコース残基の72.9%であり、
(g)平均グルコース重合度が31であり、Mw/Mnが2.0である。
国際公開第WO2008/136331号パンフレットの実験2-2に記載された方法に従い、固形分濃度30質量%の分岐α-グルカン混合物溶液を調製し、その後、常法に従って噴霧乾燥して分岐α-グルカン混合物粉末を得た。なお、得られた分岐α-グルカン混合物粉末は、以下の(a)乃至(g)の特徴を有していた。
(a)グルコースを構成糖とし、
(b)α-1,4結合を介して連結したグルコース重合度3以上の直鎖状グルカンの一端に位置する非還元末端グルコース残基にα-1,4結合以外の結合を介して連結したグルコース重合度1以上の分岐構造を有し、
(c)イソマルトデキストラナーゼ消化により、イソマルトースを消化物の固形物当たり27.2質量%生成し、
(d)水溶性食物繊維含量が41.8質量%であり、
(e)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基の比が1:0.6であり、
(f)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基との合計が全グルコース残基の83.0%であり、
(g)平均グルコース重合度が405であり、Mw/Mnが16.2である。
国際公開第WO2008/136331号パンフレットの実施例6に記載された方法に従い、分岐α-グルカン混合物粉末を調製した。なお、得られた分岐α-グルカン混合物粉末は、(a)乃至(g)の特徴を有していた。
(a)グルコースを構成糖とし、
(b)α-1,4結合を介して連結したグルコース重合度3以上の直鎖状グルカンの一端に位置する非還元末端グルコース残基にα-1,4結合以外の結合を介して連結したグルコース重合度1以上の分岐構造を有し、
(c)イソマルトデキストラナーゼ消化により、イソマルトースを消化物の固形物当たり40.6質量%生成し、
(d)水溶性食物繊維含量が77.0質量%であり、
(e)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基の比が1:4であり、
(f)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基との合計が全グルコース残基の67.9%であり、
(g)平均グルコース重合度が18であり、Mw/Mnが2.0である。
トウモロコシ澱粉液化液に、さらにマルトテトラオース生成アミラーゼを固形物1グラム当たり2単位添加した以外は、国際公開第WO2008/136331号パンフレットの実施例5に記載された方法に従い、分岐α-グルカン混合物粉末を調製した。なお、得られた分岐α-グルカン混合物粉末は、(a)乃至(g)の特徴を有していた。
(a)グルコースを構成糖とし、
(b)α-1,4結合を介して連結したグルコース重合度3以上の直鎖状グルカンの一端に位置する非還元末端グルコース残基にα-1,4結合以外の結合を介して連結したグルコース重合度1以上の分岐構造を有し、
(c)イソマルトデキストラナーゼ消化により、イソマルトースを消化物の固形物当たり41.9質量%生成し、
(d)水溶性食物繊維含量が69.1質量%であり、
(e)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基の比が1:2.4であり、
(f)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基との合計が全グルコース残基の64.2%であり、
(g)平均グルコース重合度が13であり、Mw/Mnが2.0である。
実施例1に記載された方法で得られた分岐α-グルカン混合物にアミログルコシダーゼ(グルコアミラーゼ)を作用させ、分解されなかった成分をゲル濾過クロマトグラフィーを用いて分取した。その後、常法に従って精製及び噴霧乾燥して分岐α-グルカン混合物粉末を調製した。なお、得られた分岐α-グルカン混合物は、(a)乃至(g)の特徴を有していた。
(a)グルコースを構成糖とし、
(b)α-1,4結合を介して連結したグルコース重合度3以上の直鎖状グルカンの一端に位置する非還元末端グルコース残基にα-1,4結合以外の結合を介して連結したグルコース重合度1以上の分岐構造を有し、
(c)イソマルトデキストラナーゼ消化により、イソマルトースを消化物の固形物当たり21質量%生成し、
(d)水溶性食物繊維含量が94.4質量%であり、
(e)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基の比が1:1.9であり、
(f)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基との合計が全グルコース残基の64%であり、
(g)グルコース重合度が22であり、Mw/Mnが1.7である。
噴霧乾燥により製造したオレンジ果汁粉末33質量部に対して、実施例5に記載された方法で得られた分岐α-グルカン混合物粉末10質量部、グルコース20質量部、無水結晶マルチトール20質量部、無水クエン酸0.65質量部、リンゴ酸0.1質量部、2-O-α-グルコシル-L-アスコルビン酸0.2質量部、クエン酸ソーダ0.1質量部、及び粉末香料の適量をよく混合攪拌し、粉砕し微粉末にして、これを流動層造粒機に仕込み、排風温度40℃とし、これに実施例1の方法で得た分岐α-グルカン粉末を水に溶解して得た溶液をバインダーとして適量スプレーし、30分間造粒し、計量し、包装して製品を得た。本品は、単糖類を含む果汁含有率約30%の粉末ジュースである。本品は、単糖類を含んでいるものの血糖値上昇抑制剤として分岐α-グルカン混合物を配合しているので、摂取した場合の血糖値の上昇を抑制できる粉末ジュースである。また、本品は、異味、異臭がなく、ジュースとして商品価値の高いものである。
コーンスターチ100質量部、実施例4に記載された方法で得られた分岐α-グルカン混合物粉末30質量部、トレハロース含水結晶70質量部、グルコース40質量部、および食塩1質量部を充分に混合し、鶏卵280質量部を加えて攪拌し、これに沸騰した牛乳1、000質量部を徐々に加え、更に火にかけて攪拌を続け、コーンスターチが完全に糊化して全体が半透明になった時に火を止め、これを冷却して適量のバニラ香料を加え、計量、充填、包装して製品を得た。本品は単糖類、二糖類、多糖類を含むカスタードクリームである。本品は、単糖類、二糖類、多糖類を含んでいるものの血糖値上昇抑制剤として分岐α-グルカン混合物を配合しているので、摂取した場合の血糖値の上昇を抑制できるカスタードクリームである。また、本品は、なめらかな光沢を有し、風味良好で、高品質のカスタードクリームである。
グルコース247g、実施例3に記載された方法で得られた分岐α-グルカン混合物粉末217g、ピロリン酸鉄懸濁液(太陽化学社製商品名サンアクティブFeM)8g、ビタミンプレミックス15g、アスコルビン酸ナトリウム3g、亜鉛酵母0.5g、クロム酵母0.3g、スクラロース0.2gを造粒原末として造粒装置に投入した。一方、造粒調整用水100mL中にコーヒー抽出粉末15g、硫酸マグネシウム10gを溶解させた。造粒原末を装置内で混合させているところに造粒調整液をノズルの先から少しずつ噴霧して顆粒化し、1パック5.15gもしくは1パック10.3gとなるようアルミ袋に窒素ガス充填した。本品は単糖類を含む栄養補助食品である。本品は、単糖類を含んでいるものの血糖値上昇抑制剤として分岐α-グルカン混合物を配合しているので、摂取した場合の血糖値の上昇を抑制できる栄養補助食品である。また、本品は、異味、異臭がなく、栄養補助食品として商品価値の高いものである。
実施例1に記載された方法で得られた分岐α-グルカン混合物粉末を用いて、本発明の経口組成物である紅茶を製造した。茶葉15gに対して沸騰水1Lを加え、茶葉を濾過して紅茶抽出液1Lを得た。紅茶抽出液1Lに異性化糖を60g加え、さらに分岐α-グルカン混合物を重量比で2%、3%、4%添加した紅茶を、それぞれ本発明の紅茶飲料A、B、Cとした。また、分岐α-グルカン混合物を添加しない点以外は、上記と同様の方法で得た紅茶飲料を、対照とした。20~50代の男女10名で官能評価を行ったところ、紅茶飲料に含有するポリフェノール特有の苦みや渋みをマスキングする効果があることが分かった。さらに、本発明の紅茶飲料A、B、Cは、室温に保存しても、対照と比較してクリームダウン現象(紅茶を徐々に冷やすと白く濁る現象)が抑制されることが分かった。
○:グルコースのみからなる対照試料を摂取した際の血糖値の増分の平均値(Δ血糖)
●:グルコースとともに分岐α-グルカン混合物を含有する被験試料を摂取した際の血糖値の増分の平均値(Δ血糖)
図2において、
a:ゴム栓
b:排気用小孔
c:先を切断したプラスチック製1mLチップ
d:プラスチック製20mL容注射筒
e:反転小腸
f:漿膜側緩衝液
g:粘膜側緩衝液
h:95%O2-5%CO2ガス還流用チューブ
Claims (7)
- 下記(A)乃至(C)の特徴を有する分岐α-グルカン混合物を有効成分とする、ヒトの単糖類摂取後の血糖値の上昇を抑制する血糖値上昇抑制剤:
(A)グルコースを構成糖とし、
(B)α-1,4結合を介して連結したグルコース重合度3以上の直鎖状グルカンの一端に位置する非還元末端グルコース残基にα-1,4結合以外の結合を介して連結したグルコース重合度1以上の分岐構造を有し、
(C)イソマルトデキストラナーゼ消化により、イソマルトースを生成する。 - 前記分岐α-グルカン混合物が、イソマルトデキストラナーゼ消化により、イソマルトースを消化物の固形物当たり5質量%以上70質量%以下生成する分岐α-グルカン混合物であることを特徴とする請求項1記載の血糖値上昇抑制剤。
- 前記分岐α-グルカン混合物が、下記(D)の特徴を有する分岐α-グルカン混合物である請求項1又は2記載の血糖値上昇抑制剤:
(D)高速液体クロマトグラフ法(酵素-HPLC法)により求めた水溶性食物繊維含量が40質量%以上である。 - 前記分岐α-グルカン混合物が、下記(E)及び(F)の特徴を有する分岐α-グルカン混合物である請求項1乃至3のいずれかに記載の血糖値上昇抑制剤:
(E)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基の比が1:0.6乃至1:4の範囲にある;及び
(F)α-1,4結合したグルコース残基とα-1,6結合したグルコース残基との合計が全グルコース残基の55%以上を占める。 - 前記分岐α-グルカン混合物の平均グルコース重合度が、8乃至500であることを特徴とする請求項1乃至4のいずれかに記載の血糖値上昇抑制剤。
- 請求項1乃至5のいずれかに記載の血糖値上昇抑制剤と、単糖類を含有することを特徴とする経口組成物。
- 単糖類が、グルコース及びフルクトースからなる群より選ばれる少なくとも1種であることを特徴とする請求項6記載の経口組成物。
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