WO2018225556A1 - 新規乳酸菌及びその用途 - Google Patents
新規乳酸菌及びその用途 Download PDFInfo
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- WO2018225556A1 WO2018225556A1 PCT/JP2018/020333 JP2018020333W WO2018225556A1 WO 2018225556 A1 WO2018225556 A1 WO 2018225556A1 JP 2018020333 W JP2018020333 W JP 2018020333W WO 2018225556 A1 WO2018225556 A1 WO 2018225556A1
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- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
- C12N1/205—Bacterial isolates
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
- A23K10/16—Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/10—Animal feeding-stuffs obtained by microbiological or biochemical processes
- A23K10/16—Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions
- A23K10/18—Addition of microorganisms or extracts thereof, e.g. single-cell proteins, to feeding-stuff compositions of live microorganisms
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/10—Organic substances
- A23K20/163—Sugars; Polysaccharides
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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 OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- A23L19/00—Products from fruits or vegetables; Preparation or treatment thereof
- A23L19/09—Mashed or comminuted products, e.g. pulp, purée, sauce, or products made therefrom, e.g. snacks
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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 OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF
- 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
- A23L33/135—Bacteria or derivatives thereof, e.g. probiotics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K35/00—Medicinal preparations containing materials or reaction products thereof with undetermined constitution
- A61K35/66—Microorganisms or materials therefrom
- A61K35/74—Bacteria
- A61K35/741—Probiotics
- A61K35/744—Lactic acid bacteria, e.g. enterococci, pediococci, lactococci, streptococci or leuconostocs
- A61K35/747—Lactobacilli, e.g. L. acidophilus or L. brevis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
- A61K8/99—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from microorganisms other than algae or fungi, e.g. protozoa or bacteria
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
- A61P1/16—Drugs for disorders of the alimentary tract or the digestive system for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/08—Antiallergic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P39/00—General protective or antinoxious agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
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- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/04—Polysaccharides, i.e. compounds containing more than five saccharide radicals attached to each other by glycosidic bonds
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y302/00—Hydrolases acting on glycosyl compounds, i.e. glycosylases (3.2)
- C12Y302/01—Glycosidases, i.e. enzymes hydrolysing O- and S-glycosyl compounds (3.2.1)
- C12Y302/01035—Hyaluronoglucosaminidase (3.2.1.35), i.e. hyaluronidase
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- 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
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- 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
- A23V2400/00—Lactic or propionic acid bacteria
- A23V2400/11—Lactobacillus
- A23V2400/165—Paracasei
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- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/26—Preparation of nitrogen-containing carbohydrates
- C12P19/28—N-glycosides
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
- C12R2001/225—Lactobacillus
Definitions
- the present invention relates to a novel lactic acid bacterium and its use. More specifically, the present invention relates to a novel lactic acid bacterium that produces a neutral polysaccharide having a structure in which N-acetylglucosamine is linked by ⁇ -1,6 linkage as an extracellular polysaccharide, and an antiallergic effect containing the same.
- the present invention relates to a composition such as a food / beverage product composition and a pharmaceutical composition to be exhibited.
- Lactic acid bacteria are a group of bacteria that ferment carbohydrates such as glucose to gain energy and produce large amounts of lactic acid, and are non-pathogenic and non-spore-forming gram-positive bacteria. Lactic acid bacteria have long been used for the preparation of fermented foods such as yogurt and cheese, and are also widely used as probiotics because they exhibit beneficial effects for host health care when administered in appropriate amounts.
- lactic acid bacteria effective as probiotics include Lactobacillus plantarum MA2 strain (non-patent document 1) having an effect on serum lipids, and Lactobacillus plantarum-PH04 strain (non-patent document) having a cholesterol-reducing action. 2) is known. Further, as a plant-derived lactic acid bacterium, Pediococcus pentosaceus LP28 strain (Non-patent Document 3) having an effect of improving fatty liver and suppressing accumulation of body fat is also known.
- Non-patent Document 4 As for the lactic acid strain belonging to Lactobacillus paracasei, Lactobacillus paraparai K71 (Patent Document 1) having antiallergic activity, Lactobacillus paracasei MCC1375 having anti-influenza virus activity (Patent Document 2), interleukin- Lactobacillus paracasei KW3110 strain (Non-patent Document 4) that activates 12 production is known.
- Some lactic acid strains are known to produce exopolysaccharide as a physiologically active substance that contributes to maintaining and improving human health. It has been shown that the exopolysaccharide produced by lactic acid bacteria exhibits an immunoregulatory function and an anti-gastritis action (Non-Patent Documents 5 and 6).
- exopolysaccharides produced by lactic acid bacteria belonging to Lactobacillus ⁇ ⁇ paracasei are also known
- Lactobacillus paracasei DG strain produces exopolysaccharides rich in rhamnose (Non-patent Document 7)
- Lactobacillus paracasei KB28 strain is glucose.
- Non-patent Document 8 Lactobacillus paracasei 34-1 strain has also been reported to produce exopolysaccharides consisting of D-galactose, 2-acetamido-2-deoxy-D-galactose and sn-glycerol 3-phosphate (Non-patent literature) 9).
- this invention is anticipated as a new probiotic, and makes it a subject to provide the novel lactic acid bacteria effective as an active ingredient of compositions, such as a food-drinks composition and a pharmaceutical composition, and its use.
- the present invention relates to a lactic acid bacterium that produces a neutral polysaccharide having a structure in which N-acetylglucosamine is linked by ⁇ -1,6 linkage as an extracellular polysaccharide.
- the lactic acid bacterium is preferably a lactic acid bacterium belonging to Lactobacillus, and particularly preferably a lactic acid bacterium belonging to Lactobacillus paracasei.
- the lactic acid bacterium of the present invention is preferably a lactic acid bacterium derived from a fig, and in particular, Lactobacillus paracasei IJH-SONE68 strain (Accession No. NITE BP-02242) or an equivalent lactic acid bacterium is preferable.
- the neutral polysaccharide produced by this lactic acid bacterium particularly has hyaluronidase inhibitory activity.
- the present invention relates to a composition containing these lactic acid bacteria.
- the composition is preferably a food / beverage product composition, and the food / beverage product is preferably a beverage, a functional food, a fermented food or a supplement.
- the composition is preferably a pharmaceutical composition, a feed composition and a cosmetic composition. These compositions are preferably used for hyaluronidase inhibition, anti-allergy or anti-alcohol injury and the like.
- the lactic acid bacteria of the present invention Since polysaccharides such as neutral polysaccharides produced by the lactic acid bacteria of the present invention as exopolysaccharides exhibit an activity of inhibiting hyaluronidase, an enzyme that hydrolyzes hyaluronic acid, the lactic acid bacteria of the present invention exhibit antiallergic effects and the like. It is effective as a food, drink, supplement, medicine and feed. Moreover, the lactic acid bacteria of the present invention provide AST (aspartate aminotransferase), ALT (alanine aminotransferase), ALP (alkaline phosphatase), etc. in serum, which are test indicators of alcohol injury, for alcoholic hepatitis induced model mice.
- AST aspartate aminotransferase
- ALT alanine aminotransferase
- ALP alkaline phosphatase
- the lactic acid bacteria of the present invention have high resistance to gastric acid and bile acids, foods and drinks, supplements and pharmaceuticals that exhibit their effects particularly in the human digestive tract, mammals, livestock, pets, etc. It is effective as a feed.
- the lactic acid bacteria of the present invention exhibit a strong growth ability even in a medium using egg white, lysozyme, which is an enzyme that decomposes the bacterial cell wall, present in egg white, and interferes with iron utilization by bacteria by chelating action.
- the defense mechanism with respect to the transferrin which has a function is strong, and also from this aspect, the lactic acid bacteria of the present invention can be effectively used as foods and drinks and medicines.
- the lactic acid bacterium of the present invention has the ability to assimilate amygdalin that may produce cyanide when decomposed or arbutin that inhibits melanin production and is said to have a whitening effect. Yes.
- strong growth ability is exhibited even in a medium using egg white, it can be effectively used as a cosmetic product together with, for example, egg white.
- FIG. 1 is a photomicrograph of Lactobacillus paracasei IJH-SONE68 strain isolated and identified by the present invention.
- 1A is a Gram-stained micrograph
- FIG. 1B is a scanning electron microscope (SEM) photo.
- FIG. 2 is a separation profile of Lactobacillus paracasei IJH-SONE68 exopolysaccharide by anion exchange chromatography (TOYOPEARL DEAE-650M Resin (Tosoh Corporation)).
- FIG. 3 shows that an extracellular neutral polysaccharide obtained by purifying an exopolysaccharide of Lactobacillus paracasei IJH-SONE68 strain by anion exchange column chromatography was obtained by subjecting it to proton-NMR and carbon-NMR. Each NMR profile obtained is shown.
- 3A is an NMR profile of proton-NMR
- FIG. 3B is an NMR profile of carbon-NMR.
- FIG. 4 shows the structural analysis result of extracellular neutral polysaccharide from the NMR profile. From the results of this structural analysis, it was revealed that the extracellular neutral polysaccharide of Lactobacillus paracasei IJH-SONE68 strain has a structure in which N-acetylglucosamine is linked by ⁇ -1,6 bonds.
- FIG. 5 is an organization chart of an extracellular polysaccharide biosynthetic gene cluster named pcel cluster and pce2 cluster of genomic DNA of Lactobacillus paracasei IJH-SONE68 strain.
- FIG. 6A shows a genome rearrangement map among three lactic acid bacteria of (A) Lactobacillus paracasei IJH-SONE68, ATCC 334, and JCMJ8130T, and (B) shows the pce1 gene cluster of Lactobacillus caseparacasei IJH-SONE68. And the correspondence of gene clusters in JCM 8130T strain.
- FIG. 7 is a graph showing the effect of Lactobacillus paracasei IJH-SONE68 strain on AST (aspartate aminotransferase) in the serum of alcoholic hepatitis-induced model mice.
- FIG. 7 is a graph showing the effect of Lactobacillus paracasei IJH-SONE68 strain on AST (aspartate aminotransferase) in the serum of alcoholic hepatitis-induced model mice.
- FIG. 8 is a graph showing the influence of Lactobacillus paracasei IJH-SONE68 strain on ALT (alanine aminotransferase) in the serum of alcoholic hepatitis-induced model mice.
- FIG. 9 is a graph showing the influence of Lactobacillus paracasei IJH-SONE68 strain on ALP (alkaline phosphatase) in the serum of alcoholic hepatitis-induced model mice.
- FIG. 10 is a graph showing the effect of Lactobacillus paracasei IJH-SONE68 strain on LDH (lactate dehydrogenase) in the serum of alcoholic hepatitis-induced model mice.
- FIG. 11 is a graph showing the effect of Lactobacillus paracasei IJH-SONE68 strain on LAP (leucine aminopeptidase) in the serum of alcoholic hepatitis-induced model mice.
- FIG. 12 is a graph showing the effect of Lactobacillus paracasei IJH-SONE68 strain on LIP (lipase) in the serum of alcoholic hepatitis induced model mice.
- FIG. 13 shows the results of culturing Lactobacillus paracasei IJH-SONE68 strain in a medium using egg white.
- FIG. 14 shows the results of culturing Lactobacillus paracasei IJH-SONE68 strain in a medium in which glucose and book bittern were added to egg white.
- Lactic acid bacterium of the present invention is a lactic acid bacterium that produces a neutral polysaccharide having a structure in which N-acetylglucosamine is linked by ⁇ -1,6 linkage as an extracellular polysaccharide. Lactic acid bacteria that produce neutral polysaccharides having a structure in which N-acetylglucosamine is linked by ⁇ -1,6 bonds as exopolysaccharides have not been known so far and have been found for the first time by the present invention.
- the lactic acid bacterium of the present invention may be any lactic acid bacterium as long as it produces a neutral polysaccharide having such a specific structure, and is not limited to a specific lactic acid bacterium.
- Examples of the lactic acid bacteria of the present invention include, for example, Lactobacillus genus, Leuconostoc genus, Streptococcus genus, Pediococcus genus, Melissococcus genus, Enterococcus genus, Trichococcus genus, Lactococcus genus, Carnobacterium genus, Vagococcus genus, Tetragenococcus genus, Atopobium genus, Weissella genus, Oenococcus genus Oenococcus, Abiotrophia, Desemzia, Paralactobacillus, Granulicatella, Alkalibacterium, Olsenella, Isobaculum ), Marinilactibacillus, Atopostipes, Lactovum, Pilibacter, Fructobacillus, Lacticigemium, Balicoccus (Balicoccus) And lactic acid bacteria belonging to the gen
- Lactobacillus examples include, for example, Lactobacillus paracasei, Lactobacillus acetotolerans, Lactobacillus aacidifarinae, Lactobacillus actophilus, Lactobacillus actophilus, Lactobacillus actioba, Lactobacillus actioba, Lactobacillus Lactobacillus amylovorus, Lactobacillus animalis, Lactobacillus antri, Lactobacillus apodemi, Lactobacillus aquaticus, Lactobacillus aviaries, Lactobacillus bifermentans, Lactobacillus bobalius, Lactobacillus brevis, Lactobacillus buchneri, Lactobacillus cacaonum, Lactobacillus camelliae, Lactobacillus capilatus, Lactobacillus casei, Lactobacillus catenaformis, Lactobacillus ceti, Lactobacill
- Lactobacillus delbrueckii subsp. delbrueckii Lactobacillus delbrueckii subsp. indicus
- Lactobacillus delbrueckii subsp. lactis Lactobacillus dextrinicus, Lactobacillus diolivorans, Lactobacillus equi, Lactobacillus equigenerosi, Lactobacillus fabifermentans, Lactobacillus farciminis , Lactobacillus farraginis, Lactobacillus fermentum, Lactobacillus fornicalis, Lactobacillus fructivorans, Lactobacillus frumenti, Lactobacillus fuchuensis, Lactobacillus gallinarum, Lactobacillus gasseri, Lactobacillus gastricus, Lactobacillus ghanensis, Lactobacillus graminis, Lactobacillus hammesii, Lactobacill
- the lactic acid bacteria of the present invention are preferably lactic acid bacteria derived from FIG.
- Lactobacillus paracasei IJH-SONE68 is used as a lactic acid bacterium that produces a neutral polysaccharide having a structure in which N-acetylglucosamine is linked by ⁇ -1,6 linkages as an extracellular polysaccharide.
- a strain was isolated and identified.
- the Lactobacillus paracasei IJH-SONE68 strain isolated and identified from the fig leaf is a catalase-negative gram-positive gonococci and has white colony-forming properties, and is subject to conditional heterolactic acid fermentation. It has mycological properties that it has characteristics. Furthermore, it has the ability to produce a polysaccharide, particularly a neutral polysaccharide having a structure in which N-acetylglucosamine is linked by ⁇ -1,6 bonds.
- This neutral polysaccharide can be obtained by separating and purifying a polysaccharide obtained from the culture of Lactobacillus paracasei IJH-SONE68 strain by anion exchange chromatography, as described in Example 4 described later. From the proton-NMR and carbon-NMR NMR profiles shown in FIG. 3, this neutral polysaccharide was found to have a structure in which N-acetylglucosamine was linked by ⁇ -1,6 bonds.
- Lactobacillus paracasei IJH-SONE68 strain has an ability to assimilate saccharides.
- the ability to assimilate saccharides is characterized by the ability not to assimilate amygdalin, which can produce hydrocyanic acid when decomposed, or arbutin, which inhibits melanin production and is said to have a whitening effect. have.
- Lactobacillus paracasei IJH-SONE68 strain Analysis of the entire genome sequence of Lactobacillus paracasei IJH-SONE68 strain revealed that the genomic DNA of Lactobacillus paracasei IJH-SONE68 strain was composed of 3,084,917 bp with a GC content of 46.37%, and the number of structural genes was predicted to be 2,963. Furthermore, Lactobacillus paracasei IJH-SONE68 strain had two plasmids, one of which was at least 51 kb and the other one was 45,267 bp in size. Compared to other lactic acid bacteria, Lactobacillus paracasei IJH-SONE68 strain has a larger genome size and structural gene number.
- lactic acid bacteria equivalent to Lactobacillus paracasei IJH-SONE68 strain are also included in the lactic acid bacteria of the present invention.
- an equivalent lactic acid bacterium refers to a lactic acid bacterium belonging to Lactobacillus paracasei and having the ability to produce a neutral polysaccharide having a structure in which N-acetylglucosamine is linked by ⁇ -1,6 bonds.
- the equivalent lactic acid bacterium is a strain belonging to Lactobacillus paracasei, and the base sequence of the 16S rDNA gene is 98% or more of the base sequence of SEQ ID NO: 1 of the 16S rDNA gene of Lactobacillus paracasei IJH-SONE68 strain,
- the strain preferably has 99% or more, more preferably 100% identity, and preferably has the same bacteriological properties and / or the same saccharide utilization ability as the Lactobacillus paracasei IJH-SONE68 strain.
- Equivalent lactic acid bacteria are strains belonging to Lactobacillus paracasei and have the same biological activities as those of Lactobacillus paracasei IJH-SONE68, such as antiallergic action, antialcohol damage action, and acid resistance. Refers to a strain. These equivalent lactic acid bacteria can be obtained, for example, by subjecting the Lactobacillus paracasei IJH-SONE68 strain to usual mutation treatment techniques such as mutation and gene recombination, and the Lactobacillus paracasei IJH-SONE68 strain. It may be a strain bred by selection of a mutant strain or the like.
- the lactic acid bacteria of the present invention are prepared by separating and purifying exopolysaccharides produced by lactic acid bacteria in the same manner as the separation and purification of polysaccharides produced by Lactobacillus paracasei IJH-SONE68 strain described in Example 4 described later. It can be obtained by isolating and examining whether the polysaccharide is a neutral polysaccharide having a structure in which N-acetylglucosamine is linked by ⁇ -1,6 bonds.
- the lactic acid bacteria of the present invention can be easily grown by culturing them.
- the culture method may be any culture method that allows lactic acid bacteria to grow, and is not limited to a specific culture method, and a method usually used for culturing lactic acid bacteria can be used as it is or after being appropriately modified.
- the culture temperature is usually 25 to 50 ° C., preferably 35 to 42 ° C.
- Cultivation may be carried out under aerobic conditions or anaerobic conditions, particularly preferably under anaerobic conditions.
- culturing while aerating an anaerobic gas such as carbon dioxide gas or nitrogen gas having an appropriate concentration. Can do.
- the medium for cultivating lactic acid bacteria is not particularly limited, and a medium usually used for culturing lactic acid bacteria can be appropriately modified as necessary. That is, as the carbon source, for example, saccharides such as galactose, glucose, fructose, mannose, sorbose, mannitol, salicin, cellobiose, maltose, sucrose, trehalose, starch hydrolyzate, molasses, etc. can be used according to utilization. . As the nitrogen source, for example, ammonium salts such as ammonia, ammonium sulfate, ammonium chloride, and ammonium nitrate, and nitrates can be used.
- the carbon source for example, saccharides such as galactose, glucose, fructose, mannose, sorbose, mannitol, salicin, cellobiose, maltose, sucrose, trehalose, starch hydrolyzate, molasses
- inorganic salts examples include sodium chloride, potassium chloride, potassium phosphate, magnesium sulfate, calcium chloride, calcium nitrate, manganese chloride, and ferrous sulfate.
- organic components such as peptone, sake lees, whey, soy flour, defatted soybean cake, meat extract, yeast extract and the like may be used.
- the prepared medium for example, an MRS medium or a modified medium thereof can be suitably used.
- the obtained culture may be used as it is, or the obtained culture solution may be diluted or concentrated, or the cells recovered from the culture may be used.
- various additional operations such as heating and freeze-drying can be performed after culturing as long as the effects of the present invention are not impaired.
- the additional operation is preferably one having a high survival rate of viable bacteria.
- the lactic acid bacterium of the present invention may be live or dead, or both live and dead. The dead bacteria may be a crushed material.
- Lactic Acid Bacteria of the Present Invention Polysaccharides such as neutral polysaccharides and acidic polysaccharides produced by the lactic acid bacteria of the present invention as exopolysaccharides exhibit an activity of inhibiting hyaluronidase, an enzyme that hydrolyzes hyaluronic acid.
- the lactic acid bacterium of the present invention has an effect of reducing AST (aspartate aminotransferase) in serum, which is a test index for alcohol injury, in alcoholic hepatitis-induced model mice.
- the lactic acid bacteria of the present invention have high resistance to gastric acid and bile acids.
- the lactic acid bacteria of the present invention exhibit strong growth ability even in a medium using egg white, lysozyme, which is an enzyme that degrades the bacterial cell wall, present in egg white, and interferes with bacterial iron utilization by chelating action. Strong biological defense mechanism against transferrin and other functions.
- the active ingredients of various compositions such as food and beverage compositions, pharmaceutical compositions, feed compositions, cosmetic compositions and the like. Can be widely used. For example, it can be used as an active ingredient in a food / beverage composition, pharmaceutical composition or feed composition for hyaluronidase inhibition, anti-allergy or anti-alcohol injury.
- the lactic acid bacteria of this invention can also be used as an active ingredient of a cosmetic composition with egg white etc.
- the pharmaceutical composition of the present invention is not particularly limited as long as it contains the lactic acid bacteria of the present invention.
- the pharmaceutical composition of the present invention is usually used by blending the lactic acid bacterium of the present invention with a physiologically acceptable liquid or solid pharmaceutical carrier to prepare a pharmaceutical composition.
- the dosage form of the pharmaceutical composition of the present invention is not particularly limited, and specifically, tablets, pills, powders, solutions, suspensions, emulsions, granules, capsules, syrups, suppositories, injections, Examples include ointments, patches, eye drops, and nasal drops.
- additives such as excipients, binders, disintegrants, lubricants, stabilizers, flavoring agents, diluents, surfactants, or injectable solvents that are commonly used as pharmaceutical carriers are used. Can be used.
- the content of lactic acid bacteria in the preparation of the pharmaceutical composition of the present invention is appropriately set depending on the dosage form, usage, age of subject, sex, type of disease, degree of disease, other conditions, etc.
- 10 6 to 1 ⁇ 10 12 cfu / g or 1 ⁇ 10 6 to 1 ⁇ 10 12 cfu / ml is preferable, and 1 ⁇ 10 7 to 1 ⁇ 10 11 cfu / g or 1 ⁇ 10 7 to More preferably, it is in the range of 1 ⁇ 10 11 cfu / ml.
- cfu / g or cfu / ml can be replaced with individual cells / g or individual cells / ml.
- the lactic acid bacterium of the present invention and other active ingredients, for example, an immunostimulant or the like may be appropriately used depending on the application.
- the administration time of the pharmaceutical composition of the present invention is not particularly limited, and the administration time can be appropriately selected according to the application target. It may be administered prophylactically or used for maintenance therapy. It is preferable that the dosage form is appropriately determined according to the preparation form, age of the administration subject, sex, other conditions, the degree of symptoms of the administration subject, and the like. In any case, the pharmaceutical composition of the present invention can be administered once or several times a day, and may be administered once every several days or weeks.
- the pharmaceutical composition of the present invention can be used, for example, to reduce allergies of administration subjects. Moreover, the pharmaceutical composition of the present invention can be used for the treatment, alleviation or prevention of alcoholic liver injury, alcohol dependence, alcoholic hepatitis, fatty liver and the like.
- the food / beverage product of the food / beverage product composition containing the lactic acid bacteria of the present invention is not particularly limited as long as it contains lactic acid bacteria, and as the food / beverage products, beverages such as soft drinks, carbonated drinks, nutritional drinks, fruit juice drinks, lactic acid bacteria drinks, etc.
- Concentrated concentrate of beverage, powder for preparation, etc . Ice confectionery such as ice cream, sorbet, shaved ice; strawberry, gummy, cereal, chewing gum, candy, gum, chocolate, tablet confectionery, snack confectionery, biscuit, jelly, jam, cream, and baked confectionery
- Dairy products such as processed milk, milk drinks, fermented milk, drink yogurt, butter; bread; enteral nutrition, liquid food, milk for childcare, sports drinks; foods such as puree; other functional foods, etc. Is exemplified.
- the food and drink may be a supplement, for example, a granular, powder, or tablet supplement.
- lactic acid bacteria can be ingested without being influenced by other foods with respect to the daily meal amount and calorie intake.
- the above food and drink can be produced by adding lactic acid bacteria to the raw material of the food or drink, or can be produced in the same manner as ordinary food and drink.
- the addition of lactic acid bacteria may be performed at any stage of the production process of the food or drink.
- the food and drink may be manufactured through a fermentation process using the added lactic acid bacteria. Examples of such foods and drinks include fermented foods such as lactic acid bacteria beverages and fermented milk.
- a raw material for food or beverage a raw material used for a normal beverage or food can be used.
- the manufactured food and drink can be taken orally.
- the foods and drinks of the present invention include raw materials for the production of foods and drinks, food additives, and the like which are added to the food and drinks after the production process or production.
- the lactic acid bacteria of the present invention can be used as a starter for producing fermented milk.
- the lactic acid bacteria of this invention can also be added later to the manufactured fermented milk.
- the content of lactic acid bacteria in the food / beverage product composition is appropriately set depending on the mode of the food / beverage product, but usually 1 ⁇ 10 6 to 1 ⁇ 10 12 cfu / g or 1 ⁇ 10 6 to 1 ⁇ 10 10 It is preferably in the range of 12 cfu / ml, more preferably in the range of 1 ⁇ 10 7 to 1 ⁇ 10 11 cfu / g or 1 ⁇ 10 7 to 1 ⁇ 10 11 cfu / ml.
- cfu / g or cfu / ml can be replaced with individual cells / g or individual cells / ml.
- the food / beverage composition containing the lactic acid bacteria of the present invention can be used for various applications utilizing the antiallergic effect and the antialcohol injury effect.
- the food / beverage products containing the lactic acid bacteria of this invention can be manufactured and sold as the food / beverage products in which the use was displayed.
- Such foods and drinks can be labeled as “allergy improving”, “alcohol injury improving” or the like.
- any display can be used as long as the display represents an effect that is secondarily generated by such an improvement effect.
- display means all actions to inform consumers of the above uses, and if the display can recall and analogize the uses, the purpose of the display and the content of the display Regardless of the object and medium to be displayed, all fall under “display”. However, it is preferable to display in such an expression that the consumer can directly recognize the application.
- the above uses are displayed on the product relating to the food or drink of the present invention or the packaging of the product, and in particular, promotional materials on the sales site such as packaging, containers, catalogs, brochures, POPs, other documents, etc. Indication is preferable.
- the display include health foods, functional foods, enteral nutrition foods, special-purpose foods, functional nutrition foods, quasi-drugs, and foods for specified health use.
- Examples of the feed of the feed composition containing the lactic acid bacteria of the present invention include pet food, livestock feed, and fish feed.
- Such feeds are general feeds such as cereals, potatoes, potatoes, fish meal, bone meal, fats and oils, skim milk powder, whey, bittern, mineral feed, yeast, etc. Can be manufactured.
- the feed may be produced through a fermentation process with added lactic acid bacteria.
- the produced feed can be orally administered to general mammals, livestock, fish farms, pets and the like.
- a method in which a fermented product to which the lactic acid bacteria of the present invention are added can be used in a fish farm.
- the content of lactic acid bacteria in the feed composition is appropriately set depending on the form of the feed and the administration subject, but it is in the range of 1 ⁇ 10 6 to 1 ⁇ 10 12 cfu / g or 1 ⁇ 10 6 to 1 ⁇ 10 12 cfu / ml. It is preferably within the range, more preferably within the range of 1 ⁇ 10 7 to 1 ⁇ 10 11 cfu / g or 1 ⁇ 10 7 to 1 ⁇ 10 11 cfu / ml.
- cfu / g or cfu / ml can be replaced with individual cells / g or individual cells / ml.
- the feed composition containing the lactic acid bacterium of the present invention can be used, for example, for various uses utilizing an antiallergic effect.
- cosmetics of the cosmetic composition containing the lactic acid bacteria of the present invention for example, soaps, body shampoos, cleansing creams, cleansing agents such as facial cleansers; lotions, vanishing creams, cold creams, emollient creams, massage creams, etc. Cream; milky lotion, serum, etc. are mentioned.
- the lactic acid fermented egg white obtained by adding the lactic acid bacterium of the present invention to a liquid egg white obtained by splitting an egg of a bird such as a chicken and separating the yolk is fermented. It is preferable to use it.
- Such lactic acid fermentation is generally preferably performed by using glucose or the like as a nutrient source and adding a fermentation promoting substance such as yeast extract as necessary.
- Examples of the form of lactic acid fermented egg white include liquid, powder, cream, paste, and jelly according to the cosmetics to be blended.
- the content of lactic acid bacteria used in the cosmetic composition of the present invention is, for example, usually 0.001% by weight or more, more preferably 0.01% by weight or more in terms of dry matter of lactic acid fermented egg white.
- the cosmetic composition containing the lactic acid bacterium of the present invention can be used, for example, in various applications utilizing an antiallergic effect. It can also be used as a cosmetic product that exhibits a whitening effect and a moisturizing effect.
- Example 1 Isolation and identification of lactic acid bacteria 1.
- Isolation of lactic acid bacteria sample Fig variety "Toyomitsuhime" leaves, stems and fruits are selected, subdivided into 2-3mm using sterilized tweezers and scissors, then sterilized MRS Five to six pieces were placed in a test tube containing a liquid medium, and statically cultured at 28 ° C. and 37 ° C. until the MRS medium, which is a standard medium for lactic acid bacteria, became cloudy (growth). Incidentally, it took 2 to 4 days before the growth of lactic acid bacteria candidate strains was visible.
- 16S rDNA was obtained by PCR using a 27f primer (5'-AGAGTTTGATCCTGGCTCAG-3 ') (SEQ ID NO: 1 in the sequence listing) and a 1525r primer (5'-AAAGGAGGTGATCCAGCC-3') (SEQ ID NO: 2 in the sequence listing) as a template. The portion was amplified, and the target fragment was recovered from the agarose gel using NucleoSpin Gel and PCR Clean-up kit (Machalai Nagel).
- the sequence reaction by the dye terminator method for base sequence determination is performed with Big Dye Terminator Cycle Sequencing FS Ready Reaction Kit ver.3.1 (ThermoFisher Scientific) and analyzed with ABI PRISM 3130xl Genetic Analyzer (ThermoFisher Scientific) did.
- the analyzed base sequence of 16S rDNA had the base sequence of SEQ ID NO: 1 in the sequence listing.
- a homologous search was performed on this base sequence using the BLAST program, and the taxonomic identification of the isolate was performed by comparing it with the DNA data bank (DDBJ / EMBL / GenBank) database.
- the lactic acid bacteria candidate strain isolated from the fig leaf is named IJH-SONE68 strain, and the accession number of the base sequence is the strain of “Lactobacillus paracasei R094” already registered in the DNA data bank (DDBJ / EMBL / GenBank). Since it was 100% identical with the base sequence “NR — 025880”, it was identified as Lactobacillus paracasei.
- This strain was established on April 19, 2016 as the NITE P-02242 under the accession number NITE P-02242 at the National Institute of Technology and Evaluation Microbiology Center (Room 2-5-8 Kazusa, Kazusa, Kisarazu 292-0818, Japan) The deposit was made internationally and then transferred to the international deposit under the Budapest Treaty. On May 26, 2017, the deposit number for the international deposit was given as NITE BP-02242.
- genomic DNA sequencing For genomic DNA from strain IJH-SONE68, PacBio RS II (Pacific Biosciences, Menlo Park, CA, CA), in a single molecule real-time (SMRT) cell using P6 polymerase and C4 chemistry (P6C4). USA) genomic DNA sequencing.
- the purified genomic DNA sample was sheared into fragments using the g-TUBE kit (Covaris, Woburn, MA, USA). The sheared fragments were then purified using the AMPure PB kit (Pacific Biosciences).
- a DNA library was constructed using PacBio DNA template preparation kit 1.0 (Pacific Biosciences) and PacBio DNA / Polymerase Binding Kit P6 (Pacific Biosciences).
- Example 2 The bacteriological properties of the identified lactic acid bacteria
- the isolated lactic acid bacteria IJH-SONE68 strain as shown in the photograph of FIG. 1, is a catalase-negative gram-positive bacillus and has a white colony-forming condition. It had the characteristics of a typical heterolactic fermentation and the ability to produce polysaccharides.
- Example 3 Assessing ability of saccharides of isolated and identified lactic acid bacteria 1. Test method of assimilating ability The ability of IJH-SONE68 strain to assimilate 49 kinds of saccharides was examined by the following test method. The IJH-SONE68 strain was statically cultured in the MRS liquid medium until the stationary phase of growth. The cells obtained by centrifugation were washed with an appropriate amount of suspension medium (Biomelieu), and finally suspended in 2 mL of suspension medium. A part of this was added to 5 mL suspension medium, and the amount (n) at which the McFarland turbidity was 2 was determined.
- the IJH-SONE68 strain was statically cultured in the MRS liquid medium until the stationary phase of growth. The cells obtained by centrifugation were washed with an appropriate amount of suspension medium (Biomelieu), and finally suspended in 2 mL of suspension medium. A part of this was added to 5 mL suspension medium, and the amount (n) at which the McFarland turbidity was
- API 50 CHL medium Biomereu
- API 50 CHL kit Biomereu, 49 kinds of sugars were applied to the bottom of each well
- mineral oil was overlaid and set in a tray containing sterile water. After culturing at 37 ° C. for 48 hours, the presence or absence of assimilation ability was determined by observing changes in color tone in each well.
- Test results of assimilation ability The results of examining the assimilation ability of 49 strains of IJH-SONE68 strain are as shown in Table 1. Table 1 also shows the assimilation ability of other Lactobacillus paracasei, described in the patent publication, investigated using the same kit.
- the IJH-SONE68 strain has a whitening effect that inhibits the production of amygdalin and melanin, which can produce hydrocyanic acid when decomposed, compared to other Lactobacillus paracasei. Since arbutin cannot be assimilated and decomposed, it can be said that it is excellent in safety and excellent in whitening effect when used as a cosmetic additive. In addition, other Lactobacillus paracasei cannot assimilate D-adonitol and can assimilate D-thuranose, whereas IJH-SONE68 strain can assimilate D-adonitol and cannot assimilate D-thuranose. It also has the feature.
- Example 4 Separation and purification of polysaccharide produced by IJH-SONE68 strain
- the extracellular polysaccharide produced by IJH-SONE68 strain was separated and purified by the following method.
- the IJH-SONE68 strain was statically cultured in the MRS liquid medium until the stationary phase of growth. 5 mL of this culture solution was used as a seed culture solution, inoculated into 5 L of a polysaccharide-producing semisynthetic medium (the composition of which will be described later), and then statically cultured at 37 ° C. for 120 hours.
- a polysaccharide-producing semisynthetic medium the composition of which will be described later
- each added enzyme is denatured, and 8.75 mL of 100% trichloroacetic acid aqueous solution is added and mixed in order to remove it as a precipitate by subsequent centrifugation. Left to stand. The precipitate was removed by centrifugation, and 262.5 mL of 100% ethanol was added to the resulting supernatant and mixed well. Then, the polysaccharide produced by the IJH-SONE68 strain was recovered by precipitation. The precipitate was washed with 50 mL of 70% ethanol, air-dried, an appropriate amount (about 25 mL) of purified water was added, and the mixture was allowed to stand at 4 ° C. overnight to dissolve the polysaccharide. The dissolved polysaccharide sample was purified using a 10,000 MWCO ultrafiltration unit (Merck) to remove small molecules such as monosaccharides in the collected sample while replacing the solvent with purified water. A body sample was obtained.
- a 10,000 MWCO ultrafiltration unit Merck
- Vitamine Soln [G / L] 4-aminobenzoic acid 0.05 Biotin 0.001 Folic acid 0.025 Lipoic acid 0.025 Nicotinic acid 0.1 Pantothenic acid 0.05 Pyridoxamin-HCl 0.25 Vitamine B 12 0.05 Pyridoxine 0.025 Riboflavin 0.05 Thiamine 0.1
- Phenolic sulfate method DuBois M, Gilles KA, Hamilton JK, Rebers PA, Smith F., Colorimetric method for determination of sugars and related substances., Anal. Chem., 28, 350-356 (1956)
- IJH-SONE68 strain IJH-SONE68 strain
- ATCC 334 strain Makarova, K. et.al, Proc. Natl. Acad. Ci Sci. USA, 103 (42), 15611-15616 (2006)
- JCM 8130T strain Toh, H. et. al, PLoS ONE 8, e75073 (2013)
- a genome rearrangement map was created (Fig. 6). This map shows that the pce2 cluster region is specific for the IJH-SONE68 strain.
- a gene cluster showing homology to the pcel cluster was not found in the genome of the ATCC334 strain, but was present in the JCM8130T strain.
- genes homologous to the wzb gene and the priming glycosyltransferase gene were found on the pcel cluster and the pce2 cluster, respectively. Since no other clusters were found in the genomic DNA of IJH-SONE68 strain, it was considered that genes required for biosynthesis of exopolysaccharides were complemented with each other by pcel cluster and pce2 cluster. In fact, the pcel and pce2 clusters were only 34 kb apart.
- pce2J a protein deduced from one of the glycosyltransferase genes named pce2J is a pfam02485 motif or domain found in the already known ⁇ -1,6-N-acetylglucosaminyltransferase (Genes Dev. 1993 Mar; 7 (3): 468-478 and J. Biol. Chem., 1999 Jan 29; 274 (5): 3215-3221) were found to have similar motifs or domains These results suggest that the structural gene encoding this protein in the pce2 cluster is involved in the biosynthesis of neutral polysaccharides.
- the pce2 cluster is specific to the IJH-SONE68 genome compared to the ATCC 334 and JCM 8130T strains, and it is considered that a neutral polysaccharide with a novel structure is biosynthesized from the pce2 cluster.
- Example 5 Inhibition of hyaluronidase activity of exopolysaccharide produced by IJH-SONE68 strain Polysaccharide including neutral polysaccharide fraction and acidic polysaccharide fraction, which is the exopolysaccharide produced by IJH-SONE68 strain obtained in Example 4 Inhibition of the hyaluronidase activity of the sample and the neutral polysaccharide fraction and the acidic polysaccharide fraction was examined.
- Test Method A polysaccharide sample containing the neutral polysaccharide fraction and acidic polysaccharide fraction obtained in Example 4, and 10 ⁇ L of an aqueous solution containing a polysaccharide adjusted to an arbitrary concentration from the neutral polysaccharide fraction and acidic polysaccharide fraction
- 5 ⁇ L of hyaluronidase enzyme solution MP Biomedicals, 4 mg / mL, 100 mM sodium acetate buffer (pH 4.0) was added and incubated at 37 ° C. for 20 minutes.
- reaction solution 10 ⁇ L of 100 mM potassium borate buffer (pH 10.0) was added, followed by heating at 100 ° C. for 3 minutes and immediately cooling with ice. 40 ⁇ L of the reaction solution was mixed with 200 ⁇ L of p-DMAB solution (described later), reacted at 37 ° C. for 20 minutes, and the absorbance at 585 nm was measured. As a control, a reaction solution not containing the hyaluronidase enzyme solution was prepared in the same manner and experimented.
- Inhibition rate (%) 100-(S / C) x 100
- C represents the enzyme activity when the sample is not included
- S represents the enzyme activity when the sample is included.
- IC 50 value of the polysaccharide sample after acquiring multiple data with varying concentrations, plot it on a graph with the polysaccharide sample concentration on the X-axis and the inhibition rate on the Y-axis. I asked more.
- a 10 ⁇ stock solution (5 ⁇ g of p-dimethylaminobenzaldehyde, 6 ⁇ ml of 10 ⁇ M HCl, 44 ⁇ m of acetic acid) was diluted with acetic acid just before use to prepare a p-DMAB solution.
- Test results Table 2 shows the test results of inhibition of the activity against the obtained hyaluronidase.
- polysaccharide samples including neutral polysaccharide fraction and acidic polysaccharide fraction
- neutral polysaccharide fraction and acidic polysaccharide fraction which are exopolysaccharides produced by IJH-SONE68 strain Min
- the polysaccharide sample and the neutral polysaccharide fraction showed hyaluronidase inhibitory activity comparable to that of dipotassium glycyrrhizinate having anti-inflammatory action.
- Example 6 Acid resistance characteristics of IJH-SONE68 strain
- an acid resistance test was conducted on artificial gastric juice and artificial bile.
- Acid resistance test for artificial gastric juice (1) Test Method Artificial gastric juice was prepared using Japanese Pharmacopoeia Disintegration Test First Solution (pH 1.2) and Japanese Pharmacopoeia Disintegration Test Second Solution (pH 6.8) (both manufactured by Wako Pure Chemical Industries, Ltd.). Seed culture of IJH-SONE68 strain prepared by preparing artificial gastric juice with pH 3.0 containing 0.04 w / v% pepsin (1: 10000, manufactured by Wako Pure Chemical Industries, Ltd.) and stationary culture in MRS liquid medium until steady state After inoculating a certain amount of the liquid, the number of viable bacteria was counted 1, 3, and 5 hours later. The survival rate was determined with the number of viable bacteria at the time of inoculation as 100%.
- the IJH-SONE68 strain has higher acid resistance to artificial gastric juice than Lactobacillus bulgaricus B-5b.
- Acid resistance test for artificial bile (1) Test method IJH-SONE68 strain prepared with MRS liquid medium containing 0.1, 0.2, 0.3 w / v% bile powder (Wako Pure Chemical Industries, Ltd.) and statically cultured to the steady state in MRS liquid medium The seed culture solution of 0.1 v / v% was inoculated and static culture was performed at 37 ° C. for 24 hours. After completion of the culture, the turbidity (OD 600 nm) of the MRS medium containing no bile powder was taken as 100%, and the ratio of the turbidity of the MRS medium containing bile powder of each concentration was calculated. At the same time, Lactobacillus acidophilus L-54 (provided by the Japan Milk Industry Association) and Lactobacillus bulgaricus B-5b were also tested.
- the IJH-SONE68 strain has higher acid resistance to artificial bile than Lactobacillus acidophilus L-54 and Lactobacillus bulgaricus B-5b.
- Example 7 Effect of IJH-SONE68 strain on alcohol injury To investigate the effect of IJH-SONE68 strain on alcohol injury, the effect of IJH-SONE68 strain on alcoholic hepatitis-induced mice was examined.
- Alcoholic hepatitis-induced model mice were produced by ingesting ethanol-containing diet for 6 weeks in C57BL / 6J male mice (Claire Japan, 8 weeks old) with alcohol preference, and whether or not lactic acid bacteria were ingested during that time The effect was observed. Specifically, during the breeding period, the mice were divided into the following 3 groups ((1) to (3)) depending on the feed, and blood was collected 6 weeks after the start of the breeding.
- Ethanol-containing feed L10016 Prepared by mixing pre-Mix L10016A (Research Diet) with water and ethanol just before use.
- Ethanol-free feed L10015 Prepared by mixing water and maltodextrin with Pre-Mix L10016A (Research Diet) immediately before use.
- the mouse mouth 7-week-old thing was purchased, it was set as five per group, and it was used for experiment, after having raised in a normal food basket (product made from Oriental yeast, MF) beforehand for acclimatization for one week. Breeding is carried out at the Samurai Campus Experimental Facility on Hiroshima University Kashiwa Campus. Also, during the breeding period, the humidity is maintained at 40-60% and the temperature is kept at 20-26 °C, and the lighting is switched on / off every 12 hours. Went in the environment. Each mouse was identified by painting the tail with an animal marker (Muromachi Kikai) (red, blue, green, yellow, uncolored).
- an animal marker Moromachi Kikai
- the test diet was prepared by culturing and washing each lactic acid strain in MRS medium and mixing it with ethanol feed. During the experiment, the food in the feeding container was changed every day so that it could be ingested freely. No other food was given including water. The remaining amount of food was also measured.
- the mice were euthanized by inhalation of isoflurane and intraperitoneal administration of pentobarbital, and blood was collected. Serum collected from the blood was stored frozen at ⁇ 80 ° C.
- Serum AST aspartate aminotransferase
- ALT aspartine aminotransferase
- ALP alkaline phosphatase
- LDH lactate dehydrogenase
- LAP lipase
- Example 8 Application of IJH-SONE68 strain to puree An example of applying IJH-SONE68 strain to puree consisting of fig fruit, sake lees, etc. is shown below.
- Fig fruit is cut into appropriate sizes, 1.0% (w / w)% cellulose “Onozuka” 3S, 0.5% (w / w)% pectinase 3S, 0.5% (w / w)% ascorbine Sodium sulfate, 2.0% (w / w)% sake lees (brewing by-product) powder, and 100% (w / w)% pure water were added, and the whole extract apparatus (manufactured by Toyo Koatsu Co., Ltd.) was used at 50 ° C, 100% MPa. The treatment was performed for 24 hours under the conditions.
- a processing pouch (Hybrid Bag, Cosmo Bio) and all the above reagents are dissolved there. After the aqueous solution was added, bubbles were removed as much as possible and sealed with a sealer bottle (Policyler, manufactured by ASONE). The whole bag after sealing was put into an extract device basket (2L type, manufactured by Toyo Kodan Co., Ltd.) and treated under the above conditions. Before culturing, aseptically open the pouch in a clean bench (SANYO) (with scissors sterilized with alcohol), and then sterilize by a high-pressure sterilizer (Tomy Seiko Co., Ltd.) The contents were transferred aseptically (I-boy, manufactured by As One).
- SANYO clean bench
- Tomy Seiko Co., Ltd. The contents were transferred aseptically (I-boy, manufactured by As One).
- a cell suspension of Lactobacillus paracasei IJH-SONE68 strain previously seeded for 2-3 days at 37 ° C in MRS medium was added to an amount equivalent to 1 (v / v)%. Then, static culture was performed at 37 ° C. for 48 hours. Specifically, IJH was first sterilized at 118 ° C for 15 min under high pressure sterilization, and cryopreserved at -80 ° C. -The SONE68 strain stock was inoculated in a clean bench. After sealing, the cells were cultured in an incubator while standing in a test tube stand at 37 ° C. for 2-3 days.
- Example 9 Culture using egg white medium
- the IJH-SONE68 strain was cultured using egg white medium, and its proliferation was examined. 1.
- Preparation and culture of egg white medium (1) Method The chicken eggs lightly disinfected with ethanol were divided in a clean bench and divided into egg yolk and egg white, and only the egg white portion was obtained. The egg white was divided into 50-mL conical tubes, vortexed to achieve a uniform viscosity, and then dispensed into other tubes for culturing in a uniform amount.
- the culture solution of IJH-SONE68 strain lactic acid bacteria that had been seed-cultured was aseptically inoculated into each tube to a final concentration of 1 v / v%, followed by stationary culture. Similarly, culture was performed using Pediococcus pentosaceus (LP28 strain), which is another lactic acid bacterium.
- LP28 strain Pediococcus pentosaceus
- a lactic acid bacterium that produces a neutral polysaccharide having a structure in which N-acetylglucosamine is linked by ⁇ -1,6 bonds as an extracellular polysaccharide.
- [7] A composition containing the lactic acid bacterium according to any one of [1] to [6] above.
- the composition according to [7] above, wherein the composition is a food or drink composition.
- the composition according to [8] above, wherein the food or drink is a beverage, a functional food, a fermented food, or a supplement.
- the composition described in [7] above, wherein the composition is a pharmaceutical composition.
- the composition described in [7] above, wherein the composition is a feed composition.
- the composition according to [7] above, wherein the composition is a cosmetic composition.
- the composition is a food or drink composition.
- the food or drink is a beverage, a functional food, a fermented food or a supplement.
- the use according to [16] above, wherein the composition is a pharmaceutical composition.
- the use according to [16] above, wherein the composition is a feed composition.
- composition is a cosmetic composition.
- composition is a composition for inhibiting hyaluronidase.
- composition is a composition for antiallergy.
- composition is a composition for anti-alcohol injury.
- a method for producing a composition comprising mixing the lactic acid bacterium according to any one of [1] to [6] above and other components.
- the production method according to the above [25], wherein the composition is a food or drink composition.
- composition is a composition for anti-allergy.
- composition is a composition for anti-alcohol injury.
- a method for applying the lactic acid bacterium according to any one of [1] to [6] to a subject in need thereof, wherein the lactic acid bacterium according to any one of [1] to [6] An application method comprising applying a composition containing the composition to a subject.
- the application method described in [34] above, wherein the composition is a food or drink composition.
- the lactic acid bacterium of the present invention produces an exopolysaccharide that exhibits hyaluronidase inhibitory activity and exhibits an antiallergic effect, and also exhibits an antialcoholic injury effect. Furthermore, the lactic acid bacteria of the present invention have high resistance to gastric acid and bile acids, and exhibit strong growth ability even in a medium using egg white. Therefore, the lactic acid bacteria of the present invention can be used as an active ingredient for foods and drinks, pharmaceuticals, feeds, cosmetics and the like.
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Abstract
Description
乳酸菌はラクトバチルス(Lactobacillus)に属する乳酸菌が好ましく、特にラクトバチルス・パラカゼイ(Lactobacillus paracasei)に属する乳酸菌が好ましい。また、本発明の乳酸菌はイチジク由来の乳酸菌が好ましく、なかでもLactobacillus paracasei IJH-SONE68株(受託番号NITE BP-02242)又はそれと同等の乳酸菌が好ましい。
また、この乳酸菌が産生する中性多糖は、特にヒアルロニダーゼ阻害活性を有する。
組成物は飲食品組成物が好ましく、飲食品としては、飲料、機能性食品、発酵食品又はサプリメントが好ましい。また、この組成物は医薬組成物、飼料組成物及び化粧品組成物が好ましい。
これらの組成物は、好ましくは、ヒアルロニダーゼ阻害、抗アレルギー又は抗アルコール傷害等のために使用される。
さらには、本発明の乳酸菌は、胃酸や胆汁酸に対して高い耐性を有するため、特にヒトの消化管において効能を発揮する飲食品、サプリメント及び医薬品、並びに哺乳動物、家畜類、愛玩動物等の飼料として有効である。
また、本発明の乳酸菌は、卵白を用いた培地中でも強い増殖能力を発揮することから、卵白中に存在する、細菌細胞壁を分解する酵素であるリゾチームや、キレート作用により細菌の鉄利用を妨害する働きをもつトランスフェリンなどに対する防衛機構が強く、この面からも、本発明の乳酸菌は飲食品や医薬品として有効に利用し得るものである。
また、本発明の乳酸菌は、分解されると青酸を生じる可能性のあるアミグダリンや、メラニン産生を阻害して美白効果の謳われているアルブチンを資化できないという特徴を有する資化能力を持っている。さらには、上記のとおり、卵白を用いた培地中でも強い増殖能力は発揮することから、例えば、卵白などとともに、化粧品としても有効に使用することができる。
1.本発明の乳酸菌
本発明の乳酸菌は、菌体外多糖としてN-アセチルグルコサミンがα-1,6結合により連結した構造を有する中性多糖を産生する乳酸菌である。N-アセチルグルコサミンがα-1,6結合により連結した構造を有する中性多糖を菌体外多糖として産生する乳酸菌は従来知られておらず、本発明によって、初めて見出されたものである。本発明の乳酸菌は、このような特定の構造を有する中性多糖を産生する乳酸菌であれば、いずれの乳酸菌でもよく、特定の乳酸菌に限定されない。
この中性多糖は、後述する実施例4に記載するように、Lactobacillus paracasei IJH-SONE68株の培養物から得られる多糖体を陰イオン交換クロマトグラフィーによって分離精製することにより得ることができる。この中性多糖は、図3に示すプロトン-NMR及びカーボン-NMRのNMRプロファイルから、N-アセチルグルコサミンがα-1,6結合により連結した構造を有することが明らかとなった。
これらの同等の乳酸菌は、例えば、Lactobacillus paracasei IJH-SONE68株に対して突然変異、遺伝子組換え等の通常の変異処理技術を行うことによって得ることができ、また、Lactobacillus paracasei IJH-SONE68株の自然変異株の選択等によって育種された菌株であってもよい。
本発明の乳酸菌は、後述する実施例4に記載するLactobacillus paracasei IJH-SONE68株が産生する多糖体の分離精製と同様にして、乳酸菌が産生する菌体外多糖を単離し、その多糖がN-アセチルグルコサミンがα-1,6結合により連結した構造を有する中性多糖であるかどうかを調べることによって、取得することができる。
本発明の乳酸菌が菌体外多糖として産生する中性多糖や酸性多糖などの多糖体は、ヒアルロン酸を加水分解する酵素であるヒアルロニダーゼを阻害する活性を示す。本発明の乳酸菌は、アルコール性肝炎誘発モデルマウスに対して、アルコール傷害の検査指標である血清中のAST(アスパラギン酸アミノトランスフェラーゼ)などを減少させる効果を有する。本発明の乳酸菌は、胃酸や胆汁酸に対して高い耐性を有する。また、本発明の乳酸菌は、卵白を用いた培地中でも強い増殖能力は発揮することから、卵白中に存在する、細菌細胞壁を分解する酵素であるリゾチームや、キレート作用により細菌の鉄利用を妨害する働きをもつトランスフェリンなどに対する生体防衛機構が強い。
このように、本発明の乳酸菌は、各種の生物活性を発揮し、生理学的特徴を有するため、飲食品組成物、医薬組成物、飼料組成物、化粧品組成物などの各種の組成物の有効成分として広く用いることができる。例えば、ヒアルロニダーゼ阻害用、抗アレルギー用又は抗アルコール傷害用飲食品組成物、医薬組成物又は飼料組成物の有効成分として用いることができる。また、本発明の乳酸菌は、卵白などとともに化粧品組成物の有効成分として用いることもできる。
本発明の医薬組成物の剤形は特に制限されず、具体的には、錠剤、丸剤、散剤、液剤、懸濁剤、乳剤、顆粒剤、カプセル剤、シロップ剤、坐剤、注射剤、軟膏剤、貼付剤、点眼剤、及び点鼻剤等を例示できる。製剤化にあたっては、製剤担体として通常使用される賦形剤、結合剤、崩壊剤、滑沢剤、安定剤、矯味矯臭剤、希釈剤、界面活性剤、又は注射剤用溶剤等の添加剤を使用することができる。
本発明の医薬組成物の投与時期は特に限定されず、適用対象に応じて、適宜投与時期を選択することができる。また、予防的に投与してもよく、維持療法に用いてもよい。投与形態は製剤形態、投与対象の年齢、性別、その他の条件、投与対象の症状の程度等に応じて適宜決定されることが好ましい。本発明の医薬組成物は、いずれの場合も1日1回又は複数回に分けて投与することができ、また、数日又は数週間に1回の投与としてもよい。
食品又は飲料の原料としては、通常の飲料や食品に用いられている原料を使用することができる。製造された飲食品は、経口的に摂取することが可能である。
具体的には、本発明の飲食品に係る商品又は商品の包装に上記用途を表示することが例示でき、特に包装、容器、カタログ、パンフレット、POP等の販売現場における宣伝材、その他の書類等への表示が好ましい。また、表示としては、例えば、健康食品、機能性食品、経腸栄養食品、特別用途食品、栄養機能食品、医薬用部外品、特定保健用食品等を例示することができる。
本発明の乳酸菌を含む飼料組成物は、例えば、抗アレルギー効果を利用する種々の用途に用いることができる。
本発明の乳酸菌を含む化粧品組成物は、例えば、抗アレルギー効果を利用する種々の用途に用いることができる。また、美白効果や保湿効果を示す化粧品としても用いることができる。
乳酸菌の分離及び同定
1. 乳酸菌サンプルの分離
イチジク(品種「とよみつ姫」)の葉、茎、および果実を選択し、殺菌済みピンセットとハサミを用いて2~3 mmに細断片化した後、滅菌済のMRS液体培地入りの試験管に5~6個ずつの細片を入れ、28℃および37℃にて、乳酸菌の標準培地であるMRS培地が濁る (増殖する) まで静置培養した。ちなみに、乳酸菌候補株の増殖が目視できるまでに2~4日間を要した。
上記乳酸菌候補株の各培養液の一部をMRS寒天培地上にディスポーザブルループで線画塗菌後、静置培養を行った。寒天培地上に形成されたコロニーのうち、「色、つや、形状の異なるもの」を全てピックアップし、フレッシュなMRS寒天培地上に線画塗菌を行い、コロニーを純化した。
純化された各コロニーに対し、カタラーゼ酵素の産生の有無を検証するため、H2O2テストを行った。これは、10%のH2O2溶液に菌体を曝した際に起こる、カタラーゼが存在すれば生成する酸素の発生の有無を観察する試験法である。ちなみに、乳酸菌はカタラーゼを産生しない。
イチジクからの探索分離を試みた結果、イチジクの葉を分離源としたものから、カタラーゼ陰性を示す乳酸菌候補株を1株得ることができた。
上記乳酸菌候補株をMRS液体培地で改めて培養し、遠心により菌体を取得した。細胞壁溶解酵素で処理した後, DNAzol試薬を使用し、ゲノムDNAを抽出した。
Lane, D. J. (1991). 16S/23S rRNA sequencing. In Nucleic Acid Techniques in Bacterial Systematics、pp.115-175. Edited by E. Stackebrandt & M. Goodfellow. Chichester : Wileyに記載された方法に従って、ゲノムDNAを鋳型として、27fプライマー(5'-AGAGTTTGATCCTGGCTCAG-3')(配列表の配列番号1)および1525rプライマー(5'-AAAGGAGGTGATCCAGCC-3')(配列表の配列番号2)を用いたPCR反応により16S rDNA部分を増幅させ、NucleoSpin Gel and PCR Clean-up kit(マッハライ・ナーゲル社製)により、アガロースゲルより目的断片を回収した。塩基配列決定のためのダイターミネーター法によるシークエンス反応は, Big Dye Terminator Cycle Sequencing FS Ready Reaction Kit ver.3.1(ThermoFisher Scientific社製)にて行い、ABI PRISM 3130xl Genetic Analyzer(ThermoFisher Scientific社製)にて解析した。解析した16S rDNAの塩基配列は配列表の配列番号1の塩基配列を有していた。この塩基配列に対してBLAST programによる相同性検索を行い、DNA data bank(DDBJ/EMBL/GenBank)のデータベースと比較することで、分離株の分類学的同定を行った。
この菌株は、2016年4月19日に独立行政法人製品評価技術基盤機構特許微生物センター(〒292-0818千葉県木更津市かずさ鎌足2-5-8 122号室)に受託番号NITE P-02242として国際寄託され、その後にブタペスト条約に基づく国際寄託に移管されて、2017年5月26日にNITE BP-02242として国際寄託の受託番号が付与されている。
IJH-SONE68株からのゲノムDNAについて、P6ポリメラーゼおよびC4ケミストリー(P6C4)を用いた単一分子リアルタイム(SMRT)セルで、PacBio RS II(Pacific Biosciences、Menlo Park、CA、U.S.A.)によってゲノムDNA配列決定を行った。精製されたゲノムDNA試料を、g-TUBEキット(Covaris、Woburn、MA、U.S.A.)を用いて断片に剪断した。次いで、剪断された断片をAMPure PBキット(Pacific Biosciences)を用いて精製した。PacBio DNAテンプレート調製キット1.0(Pacific Biosciences)およびPacBio DNA / Polymerase Binding Kit P6(Pacific Biosciences)を用いてDNAライブラリーを構築した。短い断片をBlue Pippin(Sage Science、Beverly、MA、U.S.A.)によって除去し、次いで精製DNAライブラリーをPacBio SMRTプラットフォーム上で配列決定した。階層的ゲノムアセンブリプロセス(HGAP)プロトコル(Nat. Methods, 10, 563-56933)でデノボアセンブリを行い、得られた全ゲノムコンティグを微生物ゲノムアノテーションパイプライン(MiGAP)によりアノテーションを行った(The 20th International Conference on Genome Informatics (GIW2009) Poster and Software Demonstrations (Yokohama), S001-1-2)。
IJH-SONE68株の全ゲノム配列を決定し、その結果、ゲノムDNAはGC含量46.37%の3,084,917 bpからなり、構造遺伝子の数はMiGAPによって2,963個と予測された。さらに、配列の結果から、IJH-SONE68株は2つのプラスミドを含み、そのうちの1つが少なくとも51 kbpであり、もう1つが45,267 bpのサイズであることを示した。他の乳酸菌と比べると、IJH-SONE68株は、より大きいゲノムサイズおよび構造遺伝子数を有する。
分離同定された乳酸菌の菌学的性質
分離同定された上記乳酸菌IJH-SONE68株は、図1の写真に示すように, カタラーゼ陰性のグラム陽性桿菌で、かつ、白色コロニー形成性を有し、条件的ヘテロ乳酸醗酵の特性を有するとともに、多糖体を産生する能力を有していた。
分離同定された乳酸菌の糖類の資化能力
1. 資化能力の試験方法
IJH-SONE68株の49種類の糖類に対する資化能力について以下の試験方法により調べた。
IJH-SONE68株をMRS液体培地で増殖の定常期まで静置培養した。遠心して得られた菌体を適量のsuspension medium (ビオメリュー社製) で洗浄した後、最終的に2 mLのsuspension mediumに懸濁した。この一部を、5 mLのsuspension mediumに加えてマクファーランド濁度が2になる量 (n) を求めた。続いて, API 50 CHL培地 (ビオメリュー社製) に2nの菌液を添加し、これをAPI 50 CHLキット (ビオメリュー社製、各ウェルの底にはそれぞれ49種類の糖が塗り付けられている) の各ウェルへ分注した。最後にミネラルオイルを重層し、滅菌水を入れたトレイにセットした。37℃で48時間培養した後に、各ウェルにおける色調の変化を観察することで、資化能の有無の判定を行った。
IJH-SONE68株の49種類の糖類に対する資化能力を調べた結果は、表1に示したとおりである。表1には、特許公開公報に記載された、他のLactobacillus paracaseiについて同様のキットを用いて調べた資化能力も併せて示した。
1. IJH-SONE68株が産生する多糖体の分離精製
IJH-SONE68株が産生する菌体外多糖を以下の方法で分離精製した。
IJH-SONE68株をMRS液体培地で増殖の定常期まで静置培養した。この培養液5 mLを種培養液とし、5 Lの多糖体産生用半合成培地 (その組成は後述する) に植菌した後、37℃で120時間静置培養した。培養液を4℃に冷却した後、培養液上清中に含まれるタンパク質を変性させて、後のステップで沈殿として除去するために、202.5 mLの100%トリクロロ酢酸水溶液を加え、混和した後に30分間静置した。遠心によって沈殿を取り除き、回収した上清に等量のアセトンを加えて混和した後、4℃で一晩静置させることによって、IJH-SONE68株が産生する多糖体を沈殿させた。沈殿物を遠心によって回収した後、250 mLの70%エタノールで沈殿物の洗浄を行った。沈殿物を風乾させた後、75 mLの50 mM Tris-HCl buffer (pH 8.0) を加えて1時間混和することで、沈殿物を溶解させた。遠心によって不溶性の夾雑物を取り除いた後、回収した上清に対し、それぞれ750 μLの1 mg/mL DNase溶液 (Worthington社) および1 mg/mL RNase溶液 (ナカライテスク社) を加え、37℃で8時間反応させた。続いて750 μLの2 mg/mL proteinase K溶液 (和光純薬工業社製) を加え、37℃で16時間反応させた。反応後の溶液を4℃に冷却した後、添加した各酵素を変性させ、次の遠心で沈殿として除去するために、8.75 mLの100%トリクロロ酢酸水溶液を加えて混和し、4℃で1時間静置した。遠心によって沈殿物を取り除き、得られた上清に対し262.5 mLの100%エタノールを加え、しっかりと混和した後、遠心によってIJH-SONE68株が産生する多糖体を沈殿物として回収した。50 mLの70%エタノールで沈殿物を洗浄した後に風乾させ、適量 (約25 mL) の精製水を加えて4℃で一晩静置することで、多糖体を溶解させた。溶解後の多糖体サンプルは、10,000 MWCOの限外濾過ユニット (メルク社) を用い、溶媒を精製水に置換しながら、回収したサンプル中の単糖類などの小分子を取り除いて、精製された多糖体サンプルを得た。
以上により、IJH-SONE68株が産生する菌体外多糖として中性多糖画分および 酸性多糖画分が分離精製された。
Glucose 20
Tween 80 1.0
Ammonium citrate 2.0
Sodium acetate 5.0
MgSO4・7H2O 0.1
MnSO4・5H2O 0.05
K2HPO4 2.0
Bacto casitone 10.0
Vitamine Soln. 2 mL
Trace element Soln. 1 mL
4-aminobenzoic acid 0.05
Biotin 0.001
Folic acid 0.025
Lipoic acid 0.025
Nicotinic acid 0.1
Pantothenic acid 0.05
Pyridoxamin-HCl 0.25
Vitamine B12 0.05
Pyridoxine 0.025
Riboflavin 0.05
Thiamine 0.1
25% HCl 10 mL
FeCl2・4H2O 1.5
CoCl2・6H2O 0.19
MnCl2・4H2O 0.1
ZnCl2 0.07
H3BO3 0.006
Na2MoO4・2H2O 0.036
NiCl2・6H2O 0.024
CuCl2・2H2O 0.002
上記した陰イオン交換カラムクロマトグラフィー(TOYOPEARL DEAE-650M樹脂 (東ソ-株式会社))によって精製された菌体外中性多糖を、プロトン-NMRおよびカーボン-NMRに付し、得られたそれぞれのNMRプロファイルを図3に示した。これらのNMRプロファイルからの菌体外中性多糖の構造解析結果を図4に示した。
この構造解析結果から、IJH-SONE68株が産生する菌体外中性多糖は、N-アセチルグルコサミンがα-1,6結合により連結した構造を有することが明らかになった。
実施例1に記載したIJH-SONE68株のゲノム配列のアノテーションに基づいて、2つの菌体外多糖生合成遺伝子クラスターがゲノムDNA上に見出された(図5)。そのうちの一つの23 kbのクラスターをpcelクラスターと命名し、このpcelクラスターは、機能不明のタンパク質をコードする遺伝子を含む18個のオープンリーディングフレーム(ORF(pce1A~R))から構成されていた。他の一つの28 kbのクラスターをpce2クラスターと命名し、このpce2クラスターは、12個の完全なORFと3つの短縮(truncated)ORF(pce2A~O)を含んでいた。さらに、12個のトランスポゼース関連遺伝子がpce2クラスター上に見出された。
菌体外多糖の生合成に必要なタンパク質をコードする遺伝子に関しては、鎖長因子として作用するタンパク質-チロシンホスファターゼWzbをコードするwzb遺伝子(Yother J. Annu. Rev. Microbiol., 65, 563-581 (2011))はpcelクラスターには見出されなかった。一方、pce2クラスター上には、糖重合の最初の工程を触媒するプライミンググリコシルトランスフェラーゼ(van Kranenburg R, Vos HR, van Swam II, Kleerebezem M, de Vos WM., J. Bacteriol., 1999 Oct;181(20):6347-6353)と相同性を示す遺伝子は存在しなかった。
pce2クラスターにおいて、pce2Jと命名したグリコシルトランスフェラーゼ遺伝子の1つから推定されたタンパク質は、既に知られているβ-1,6-N-アセチルグルコサミニルトランスフェラーゼに見られるpfam02485モチーフ又はドメイン(Genes Dev. 1993 Mar;7(3):468-478及びJ. Biol. Chem., 1999 Jan 29;274(5):3215-3221)と同様のモチーフ又はドメインを持っていることが見出されたことから、pce2クラスター中のこのタンパク質をコードする構造遺伝子が中性多糖の生合成に関与していることが示唆された。実際、pce2クラスターは、ATCC 334株およびJCM 8130T株と比較してIJH-SONE68株ゲノムに特異的であり、pce2クラスターから新規な構造の中性多糖が生合成されると考えられる。
IJH-SONE68株が産生する菌体外多糖体のヒアルロニダーゼ活性阻害
実施例4で得られたIJH-SONE68株が産生する菌体外多糖である、中性多糖画分および酸性多糖画分を含む多糖サンプル、並びに中性多糖画分および酸性多糖画分のヒアルロニダーゼ活性阻害を調べた。
実施例4で得られた中性多糖画分および酸性多糖画分を含む多糖体サンプル、中性多糖画分および酸性多糖画分から任意の濃度に調整した多糖を含む水溶液10 μLに対し、5 μLのヒアルロニダーゼ酵素溶液 (MP Biomedicals社、4 mg/mL、100 mM酢酸ナトリウムbuffer (pH 4.0)) を添加し、37℃で20分インキュベートした。その後、10 μLの酵素活性化溶液 (0.5 mg/ml Compound 48/80 (MP Biomedicals社)、3.75 mg CaCl2・2H2O、100 mM酢酸ナトリウムbuffer (pH 4.0)) を加え、再び37℃で20分間インキュベートした。続いて、25 μLのヒアルロン酸ナトリウム溶液 (和光純薬工業社、0.8 mg/mL、100 mM酢酸ナトリウムbuffer (pH 4.0)) を加え、更に37℃で40分間反応させた。反応後、10 μLの0.4 M NaOH水溶液を加えることによって反応を停止させた。続いて10 μLの100 mMホウ酸カリウムbuffer (pH 10.0) を加えた後に100℃で3分間加熱し、直ちに氷冷した。反応液40 μLを200 μLのp-DMAB溶液 (後述する) と混和し、37℃で20分間反応させた後、585 nmにおける吸光度を測定した。コントロールとして、ヒアルロニダーゼ酵素溶液を含まない反応液についても同様に調製し、実験を行った。
阻害率 (%) = 100 - (S/C) × 100
この式において、Cはサンプルを含まない場合の酵素活性、Sはサンプルを含む場合の酵素活性を示す。また、多糖体サンプルのIC50値については、含有濃度を変化させたデータを複数取得した後、X軸に多糖体サンプル濃度、Y軸に阻害率を取ったグラフにプロットし、次の近似式より求めた。
Y = α / (1 + βe-γX)
式中、α、β及びγは定数を示す。
得られたヒアルロニダーゼに対する活性の阻害の試験結果を表2に示す。
IJH-SONE68株の耐酸性特性
IJH-SONE68株の耐酸性特性を調べるため、人工胃液及び人工胆汁に対する耐酸性試験を行った。
(1) 試験方法
人工胃液は日本薬局方崩壊試験第一液 (pH1.2) および日本薬局方崩壊試験第二液 (pH6.8) (共に和光純薬工業社製) を用いて調製した。0.04 w/v %ペプシン (1:10000, 和光純薬工業社製) を含有する、pH3.0の人工胃液を調製し、MRS液体培地で定常状態まで静置培養したIJH-SONE68株の種培養液を一定量接種した後、1、3、5時間後における生菌数をカウントした。接種時点における生菌数を100%とし、生存率を求めた。なお、生菌数を計測する際には、各時間経過後の溶液の一部を適宜段階希釈し、BCP加プレートカウントアガール (日水製薬社) を用いて混釈培養 (37℃, 嫌気, 数日) させ、生じたコロニー数をカウントすることで、その希釈液中に存在する生菌数を算出した。同時に、Lactobacillus bulgaricus B-5b(http://www.gene.affrc.go.jp/databases-micro_search_detail.php?maff=401001)についても試験を行った。
得られた耐酸性試験結果を表3に示す。
(1) 試験方法
0.1、0.2、0.3 w/v %の胆汁末 (和光純薬工業社製) を含有するMRS液体培地を調製し、MRS液体培地で定常状態まで静置培養したIJH-SONE68株の種培養液を0.1 v/v %接種し、37℃にて24時間の静置培養を行った。培養終了後、胆汁末を含まないMRS培地の菌体の濁度 (O.D. 600 nm) を100%とし、各濃度の胆汁末を含むMRS培地の菌体濁度の割合を算出した。同時に、Lactobacillus acidophilus L-54(日本乳業技術協会から提供されている)およびLactobacillus bulgaricus B-5bについても試験を行った。
得られた耐酸性試験結果を表4に示す。
IJH-SONE68株のアルコール傷害に対する効果
IJH-SONE68株のアルコール傷害に対する効果を調べるため、アルコール性肝炎誘発モデルマウスに対するIJH-SONE68株の影響について検討した。
アルコール嗜好性を有するC57BL/6J系の雄性マウス (日本クレア, 8週齢) に、エタノール含有飼料を6週間摂取させることでアルコール性肝炎誘発モデルマウスを作製し、その間の乳酸菌摂取の有無が及ぼす影響を観察した。具体的には、飼育期間中、マウスを餌の違いによって以下の3 群 ((1)~(3)) に分け、飼育開始6週間後に採血を行った。
2):陰性コントロール群 (エタノール非含有飼料L10015のみ)
3):IJH-SONE68株投与群 (エタノール含有飼料L10016+乳酸菌生菌体)
エタノール含有飼料L10016:
Pre-Mix L10016A (Research Diet社) に水およびエタノールを使用直前に混合して調製
エタノール非含有飼料L10015:
Pre-Mix L10016A (Research Diet社) に水およびマルトデキストリンを使用直前に混合して調製
陽性コントロール群 (PC)、陰性コントロール群 (NC)およびIJH-SONE68株投与群(SONE68)についてのAST、ALT、ALP、LDH、LAPおよびLIPの各測定値(IU/L)を図7~12のグラフに示した。図7~12のグラフから分かるように、IJH-SONE68株は、AST、ALT、ALP、LDH、LAPおよびLIPの値を陽性コントロール群 (PC)よりも減少させ、アルコール傷害に対する優れた予防改善効果を有する。
IJH-SONE68株のピューレへの適用
IJH-SONE68株を、イチジク果実、酒粕などからなるピューレに適用した例を以下に示す。
以上によって得られたピューレは、菌体懸濁液を加えないで得られたピューレに比べて、酸味が加わり良好な食感と風味が得られた。
卵白培地を用いた培養
IJH-SONE68株を卵白培地を用いて培養し、その増殖を調べた。
1.卵白培地の調製及び培養
(1). 方法
殻ごと軽くエタノールで消毒した鶏卵をクリーンベンチ中で割り、卵黄と卵白に分割し、卵白部分のみを取得した。卵白は50 mL容コニカルチューブに取り分け、ボルテックスによる撹拌を行うことで均一な粘度にした後、培養用に他のチューブに均一な量になるように分注した。
種培養したIJH-SONE68株の乳酸菌の培養液を、無菌的にそれぞれのチューブに終濃度1 v/v %となるよう植菌し、静置培養を行った。同様に、他の乳酸菌であるペディオコッカス・ペントサセウス(Pediococcus pentosaceus)(LP28株)を用いて培養を行った。
培養結果を図13に示した。図13から分かるように、IJH-SONE68株の乳酸菌は卵白を用いた培地で、非常に多く増殖した。
(1). 方法
上記1の方法で培養を行う際, 卵白に終濃度が1 w/v %となるようにグルコースを加え、さらに、同じく終濃度が1 v/v %となるように本にがり(組成:Na+:92 mg; Ca2+: 3,500 mg; Mg2+: 6,400 mg; およびK+: 2,300 mg)を加え, 培養を行った。具体的には、乳酸菌の培養前に、フィルター滅菌処理を行った10 w/v %グルコース水溶液を卵白の1/10 容量、そして同じくフィルター滅菌を行った本にがりを卵白の1/100容量、それぞれ無菌的に添加して、培養を行った。
培養結果を図14に示した。図14から分かるように、IJH-SONE68株の乳酸菌は、卵白にグルコースおよび本にがりを加えた培地で、著しく増殖した。
これらの結果から、IJH-SONE68株の乳酸菌は、卵白を用いた培地中でも強い増殖能力は発揮することから、卵白中に存在する、細菌細胞壁を分解する酵素であるリゾチームや、キレート作用により細菌の鉄利用を妨害する働きをもつトランスフェリンなどに対する生体防衛機能が強いことが分かる。
[1] 菌体外多糖としてN-アセチルグルコサミンがα-1,6結合により連結した構造を有する中性多糖を産生する乳酸菌。
[2] 乳酸菌がラクトバチルス(Lactobacillus)属に属する乳酸菌である上記[1]に記載の乳酸菌。
[3] 乳酸菌がラクトバチルス・パラカゼイ(Lactobacillus paracasei)に属する乳酸菌である上記[1]又は[2]に記載の乳酸菌。
[4] 乳酸菌がイチジク由来の乳酸菌である上記[1]~[3]のいずれかに記載の乳酸菌。
[5] 乳酸菌がLactobacillus paracasei IJH-SONE68株(受託番号NITE BP-02242)又はそれと同等の乳酸菌である上記[1]~[4]のいずれかに記載の乳酸菌。
[6] 中性多糖がヒアルロニダーゼ活性阻害を有する上記[1]~[5]のいずれかに記載の乳酸菌。
[7] 上記[1]~[6]のいずれかに記載の乳酸菌を含有する組成物。
[8] 組成物が飲食品組成物である上記[7]に記載の組成物。
[9] 飲食品が、飲料、機能性食品、発酵食品又はサプリメントである上記[8]に記載の組成物。
[10] 組成物が医薬組成物である上記[7]に記載の組成物。
[11] 組成物が飼料組成物である上記[7]に記載の組成物。
[12] 組成物が化粧品組成物である上記[7]に記載の組成物。
[13] ヒアルロニダーゼ阻害のための上記[7]~[12]のいずれかに記載の組成物。
[14] 抗アレルギーのための上記[7]~[12]のいずれかに記載の組成物。
[15] 抗アルコール傷害のための上記[7]~[12]のいずれかに記載の組成物。
[16] 組成物の有効成分としての上記[1]~[6]のいずれかに記載の乳酸菌の使用。
[17] 組成物が飲食品組成物である上記[16]に記載の使用。
[18] 飲食品が、飲料、機能性食品、発酵食品又はサプリメントである上記[17]に記載の使用。
[19] 組成物が医薬組成物である上記[16]に記載の使用。
[20] 組成物が飼料組成物である上記[16]に記載の使用。
[21] 組成物が化粧品組成物である上記[16]に記載の使用。
[22] 組成物がヒアルロニダーゼ阻害のための組成物である上記[16]~[21]のいずれかに記載の使用。
[23] 組成物が抗アレルギーのための組成物である上記[16]~[21]のいずれかに記載の使用。
[24] 組成物が抗アルコール傷害のための組成物である上記[16]~[21]のいずれかに記載の使用。
[25] 上記[1]~[6]のいずれかに記載の乳酸菌と他の成分とを混合することを含む組成物の製造方法。
[26] 組成物が飲食品組成物である上記[25]に記載の製造方法。
[27] 飲食品が、飲料、機能性食品、発酵食品又はサプリメントである上記[26]に記載の製造方法。
[28] 組成物が医薬組成物である上記[25]に記載の製造方法。
[29] 組成物が飼料組成物である上記[25]に記載の製造方法。
[30] 組成物が化粧品組成物である上記[25]に記載の製造方法。
[31] 組成物がヒアルロニダーゼ阻害のための組成物である上記[25]~[30]のいずれかに記載の製造方法。
[32] 組成物が抗アレルギーのための組成物である上記[25]~[30]のいずれかに記載の製造方法。
[33] 組成物が抗アルコール傷害のための組成物である上記[25]~[30]のいずれかに記載の製造方法。
[34] 上記[1]~[6]のいずれかに記載の乳酸菌を、それを必要とする対象に適用する方法であって、上記[1]~[6]のいずれかに記載の乳酸菌を含有する組成物を対象に適用することを含む適用方法。
[35] 組成物が飲食品組成物である上記[34]に記載の適用方法。
[36] 飲食品が、飲料、機能性食品、発酵食品又はサプリメントである上記[35]に記載の適用方法。
[37] 組成物が医薬組成物である上記[34]に記載の適用方法。
[38] 組成物が飼料組成物である上記[34]に記載の適用方法。
[39] 組成物が化粧品組成物である上記[34]に記載の適用方法。
[40] 対象に対してヒアルロニダーゼ阻害作用を発揮する上記[34]~[39]のいずれかに記載の適用方法。
[41] 対象に対して抗アレルギー作用を発揮する上記[34]~[39]のいずれかに記載の適用方法。
[42] 対象に対して抗アルコール傷害を発揮する上記[34]~[39]のいずれかに記載の適用方法。
Claims (15)
- 菌体外多糖としてN-アセチルグルコサミンがα-1,6結合により連結した構造を有する中性多糖を産生する乳酸菌。
- 乳酸菌がラクトバチルス(Lactobacillus)属に属する乳酸菌である請求項1に記載の乳酸菌。
- 乳酸菌がラクトバチルス・パラカゼイ(Lactobacillus paracasei)に属する乳酸菌である請求項1又は2に記載の乳酸菌。
- 乳酸菌がイチジク由来の乳酸菌である請求項1~3のいずれかに記載の乳酸菌。
- 乳酸菌がLactobacillus paracasei IJH-SONE68株(受託番号NITE BP-02242)又はそれと同等の乳酸菌である請求項1~4のいずれかに記載の乳酸菌。
- 中性多糖がヒアルロニダーゼ阻害活性を有する請求項1~5のいずれかに記載の乳酸菌。
- 請求項1~6のいずれかに記載の乳酸菌を含有する組成物。
- 組成物が飲食品組成物である請求項7に記載の組成物。
- 飲食品が、飲料、機能性食品、発酵食品又はサプリメントである請求項8に記載の組成物。
- 組成物が医薬組成物である請求項7に記載の組成物。
- 組成物が飼料組成物である請求項7に記載の組成物。
- 組成物が化粧品組成物である請求項7に記載の組成物。
- ヒアルロニダーゼ阻害のための請求項7~12のいずれかに記載の組成物。
- 抗アレルギーのための請求項7~12のいずれかに記載の組成物。
- 抗アルコール傷害のための請求項7~10のいずれかに記載の組成物。
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| CN115895948A (zh) * | 2022-10-24 | 2023-04-04 | 浙江一鸣食品股份有限公司 | 一种高效抑制霉菌生长的副干酪乳杆菌及其培养方法和应用 |
Also Published As
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| CA3032572C (en) | 2020-04-21 |
| BR112019000069A2 (pt) | 2019-12-17 |
| US11447740B2 (en) | 2022-09-20 |
| NZ750188A (en) | 2022-04-29 |
| KR20190111890A (ko) | 2019-10-02 |
| AU2018281511B2 (en) | 2020-04-16 |
| KR102313677B1 (ko) | 2021-10-18 |
| AU2018281511A1 (en) | 2019-01-17 |
| EP3483259A4 (en) | 2019-10-09 |
| CA3032572A1 (en) | 2018-12-13 |
| JPWO2018225556A1 (ja) | 2019-06-27 |
| US20190390289A1 (en) | 2019-12-26 |
| CN110741073A (zh) | 2020-01-31 |
| TW201902500A (zh) | 2019-01-16 |
| TWI696465B (zh) | 2020-06-21 |
| JP6523580B2 (ja) | 2019-06-05 |
| EP3483259A1 (en) | 2019-05-15 |
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