WO2012108518A1 - ラクトバチルス・ラムノーサス由来のバクテリオシン - Google Patents
ラクトバチルス・ラムノーサス由来のバクテリオシン Download PDFInfo
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- WO2012108518A1 WO2012108518A1 PCT/JP2012/053020 JP2012053020W WO2012108518A1 WO 2012108518 A1 WO2012108518 A1 WO 2012108518A1 JP 2012053020 W JP2012053020 W JP 2012053020W WO 2012108518 A1 WO2012108518 A1 WO 2012108518A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
- A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- A61K38/164—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from 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
- A61P1/02—Stomatological preparations, e.g. drugs for caries, aphtae, periodontitis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/04—Antibacterial agents
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/195—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria
- C07K14/335—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria from Lactobacillus (G)
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- 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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- C—CHEMISTRY; METALLURGY
- 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
- C12P21/00—Preparation of peptides or proteins
- C12P21/02—Preparation of peptides or proteins having a known sequence of two or more amino acids, e.g. glutathione
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- C—CHEMISTRY; METALLURGY
- 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 bacteriocin that exhibits antibacterial activity against causative bacteria of oral diseases, a composition for preventing, improving and / or treating oral diseases comprising the bacteriocin as an active ingredient, and encoding the bacteriocin.
- a recombinant expression vector obtained by incorporating the gene, a host cell having the recombinant expression vector, a transformant transformed with the recombinant expression vector, a method for producing the bacteriocin, and the bacteriocin
- the present invention relates to a Lactobacillus rhamnosus KO1 strain which is a novel lactic acid strain to be produced.
- Non-Patent Document 1 describes a low molecular weight bacteriocin rhamnosin A produced by Lactobacillus rhamnosus strain 68.
- antibacterial peptides as described above are peptides derived from mammals such as humans or artificially synthesized peptides, these peptides can be easily produced in large quantities. Can not.
- antibacterial activity is weak at low concentrations, a high concentration, that is, a large amount of antibacterial peptides is required when these are used.
- the therapeutic effect may not be obtained due to the emergence of multi-drug resistant bacteria due to the abuse of antibiotics. Therefore, there is a need for a novel bacteriocin that can be easily produced in large quantities, has high antibacterial activity even at low concentrations, and has a low possibility of causing resistant bacteria.
- the present invention has been made in view of the above circumstances, can be easily produced in large quantities, has high antibacterial activity even at low concentrations, has a wide antibacterial spectrum, and may cause resistance bacteria.
- the purpose is to provide a low bacteriocin.
- a composition for preventing, ameliorating and / or treating oral diseases comprising the bacteriocin (including pharmaceutically acceptable derivatives) as an active ingredient, a gene encoding the bacteriocin, and incorporating the gene Recombinant expression vector obtained, host cell carrying the recombinant expression vector, transformant transformed with the recombinant expression vector, method for producing the bacteriocin, and lactobacillus of a novel lactic acid strain producing the bacteriocin ⁇
- the aim is to provide Ramnosus KO1 stock.
- Lactobacillus rhamnosus KO3 strain (L8020) proposed in Patent Document 1 (Independent Administrative Institution, Product Evaluation Technology Foundation, Patent Microorganism Depositary Center ( ⁇ 292-0818, Chiba, Japan) 2-5-8) Kisarazu City, Kazusa Prefecture, Kazusa, Kashisa, on June 10, 2009. After that, a request for transfer to the deposit under the Budapest Treaty was made, and it was produced under the deposit number NITE BP-771).
- a peptide having the amino acid sequence described in SEQ ID NO: 1 (hypothetical protein HMPREF0539_2969, accession number ZP_044432437.1, hereinafter referred to as Kog1) and a peptide having the amino acid sequence described in SEQ ID NO: 2 (hypothetical protein HMPREF0539_1169, accession number ZP 04440638.1, the following Kog2) is a wide antibacterial spectrum, antibacterial high at low concentrations, are less likely isoelectric point of occurrence of the above-resistant bacteria found to act as more than 12 bacteriocin.
- Lactobacillus rhamnosus KO1 strain which is a novel lactic acid strain that similarly produces Kog1 and Kog2 ( The application for deposit was made on the 24th of March, and the separation and identification of the deposit number NITE P-1065) was also successful. That is, by using the Lactobacillus rhamnosus KO3 strain and Lactobacillus rhamnosus KO1 strain, bacteriocin Kog1 and Kog2 having a wide antibacterial spectrum, high antibacterial activity at low concentrations, and low possibility of causing resistant bacteria, It was found that it is possible to produce easily and in large quantities.
- bacteriocins Kog1 and Kog2 have a wide antibacterial spectrum, high antibacterial activity at low concentrations, and low possibility of causing resistant bacteria was clarified. As will be described in detail in Example 7 later, this is because bacteriocins Kog1 and Kog2 have an inactivating effect on endotoxin (LPS, Lipopolysaccharide) possessed by Gram-negative bacteria such as periodontal disease bacteria.
- LPS Lipopolysaccharide
- the bacteriocin according to the first aspect of the present invention is 1 or a number in the amino acid sequence shown in SEQ ID NO: 1 or SEQ ID NO: 2 in the sequence listing, It is characterized by having an amino acid sequence in which one amino acid is deleted, substituted, inserted and / or added to bring about antibacterial activity, and has an isoelectric point of 12 or more.
- the bacteriocin is characterized by having antibacterial properties against caries, periodontal disease, and Candida.
- composition for prevention, amelioration and / or treatment of oral disease according to the second aspect of the present invention is the bacteriocin according to the first aspect, or a pharmaceutically acceptable derivative or pharmacological agent in the bacteriocin. It is characterized by using as an active ingredient a salt acceptable in
- the composition for preventing, improving and / or treating oral diseases is a growth inhibitor of caries, periodontal and / or Candida.
- the gene according to the third aspect of the present invention encodes the bacteriocin according to the first aspect.
- the recombinant expression vector according to the fourth aspect of the present invention is obtained by incorporating the gene according to the third aspect.
- the host cell according to the fifth aspect of the present invention has the recombinant expression vector according to the fourth aspect.
- the transformant according to the sixth aspect of the present invention is characterized by being transformed with the recombinant expression vector according to the fourth aspect.
- the transformant is a bacterium.
- the method for producing bacteriocin according to the seventh aspect of the present invention comprises: A culture process for cultivating Lactobacillus rhamnosus , An extraction step of extracting the bacteriocin according to the first aspect from the cell culture obtained by the culturing step; It is characterized by including.
- the Lactobacillus rhamnosus ( Lactobacillus rhamnosus ) is applied to the Lactobacillus rhamnosus KO1 strain (National Institute of Technology and Evaluation, Patent Microorganism Depositary on January 24, 2011), and the accession number NITE P-1065) and / or Lactobacillus rhamnosus KO3 strain (Independent Administrative Institution, National Institute of Technology and Technology Patent Microorganisms Deposit Application on June 10, 2009, deposit number NITE BP -771).
- Lactobacillus rhamnosus ( Lactobacillus rhamnosus ) is applied to the Lactobacillus rhamnosus KO1 strain (National Institute of Technology and Evaluation, Patent Microorganism Depositary on January 24, 2011), and the accession number NITE P-1065) and / or Lactobacillus rhamnosus KO3 strain (Independent Administrative Institution, National Institute of Technology and Technology Patent Microorganisms Deposit Application on June 10, 2009, deposit number NITE BP -771).
- Candida killed bacteria are added.
- Lactobacillus rhamnosus KO1 strain according to the eighth aspect of the present invention was filed with an independent administrative agency, Product Evaluation Technology Foundation, Patent Microorganism Deposit Center on January 24, 2011, and deposited under the accession number NITE P-1065. It is characterized by having been entrusted as.
- a bacteriocin that can be easily and mass-produced, has a wide antibacterial spectrum, and is less likely to cause resistant bacteria
- the bacteriocin pharmaceutically acceptable derivatives, etc.
- a composition for the prevention, amelioration and / or treatment of oral diseases comprising an active ingredient), a gene encoding the bacteriocin, a recombinant expression vector obtained by incorporating the gene, and a host cell carrying the recombinant expression vector
- the present invention can provide a transformant transformed with the recombinant expression vector, a method for producing the bacteriocin, and a novel lactic acid strain Lactobacillus rhamnosus KO1 strain that produces the bacteriocin.
- the bacteriocin according to the present invention has high heat resistance, and for example, antibacterial performance is maintained even under boiling conditions.
- FIG. 1 It is a figure which shows the antibacterial power with respect to Candida albicans GDH18 strain
- FIG. It is a figure which shows the antibacterial activity with respect to Candida albicans GDH18 strain
- FIG. It is a figure which shows the antibacterial power with respect to Streptococcus sobrinus B-13 strain of Kog1, Kog2, and another antibacterial peptide which concern on Example 3.
- FIG. 10 is a graph showing the amount of TNF- ⁇ secreted according to the relationship between the amount of LPS and Kog1 according to Example 7. It is a figure which shows the secretion amount of ccl2 by the relationship between the quantity of LPS which concerns on Example 8, and Kog2.
- FIG. 10 is a graph showing the value of Type collagen / ⁇ -actin of real-time quantitative RT-PCR according to Example 8. It is a figure which shows the result of the heat resistance data by the boiling experiment which concerns on Example 9.
- FIG. 10 is a graph showing the value of Type collagen / ⁇ -actin of real-time quantitative RT-PCR according to Example 8. It is a figure which shows the result of the heat resistance data by the boiling experiment which concerns on Example 9.
- bacteriocin The bacteriocin according to Embodiment 1 of the present invention relates to a basic antimicrobial peptide having a specific amino acid sequence, providing a specific effect, and having a specific characteristic. More specifically, “bacteriocin” in the present specification refers to a basic antibacterial peptide (Kog1) having the amino acid sequence shown in SEQ ID NO: 1 or a basic antibacterial having the amino acid sequence shown in SEQ ID NO: 2. A peptide (Kog2) can be mentioned.
- basic antibacterial peptide having the amino acid sequence shown in SEQ ID NO: 1 and SEQ ID NO: 2 one or several amino acids are deleted, substituted, inserted and / or added, resulting in antibacterial activity, and the like
- a basic antibacterial peptide having an electric point of 12 or more is also included. “Several” is 2 to 8, preferably 2 to 6, more preferably 2 to 5, and still more preferably 2 to 4.
- bacteriocin having an amino acid sequence in which one or several amino acids are deleted, substituted, inserted and / or added in such an amino acid sequence of Kog1 or Kog2, and which provides antibacterial activity, preferably Kog1 Or it has antibacterial activity equivalent to Kog2 and approximate basicity (isoelectric point). More preferably, it has antibacterial properties against all caries, periodontal disease, and Candida.
- the bacteriocin according to the first embodiment may be produced by a method using a Lactobacillus rhamnosus KO1 strain or a KO3 strain, which will be described in detail later in the fourth embodiment. However, it may be produced by an artificial ordinary method in the art such as a peptide synthesis method or a genetic engineering method. The genetic engineering method will be described in detail later in Embodiment 3.
- liquid phase method is a method in which a reaction is carried out in a solution state, a product is isolated and purified from a reaction mixture, and this product is used as an intermediate for the next peptide extension reaction.
- solid phase method is a method in which an amino acid is bound to a solid phase carrier insoluble in a reaction solvent, a condensation reaction is sequentially performed on the amino acid, and a peptide chain is elongated.
- an amino acid protected with an amino group is dehydrated and condensed with an amino acid protected with a carboxyl group to form a peptide bond.
- the next amino group-protected amino acid is sequentially extended to the free amino group one by one from the C-terminal to the N-terminal.
- the carboxyl group is activated and reacted with an amino group to be bonded. Examples of the activation include dicyclohexylcarbodiimide (DCC) method, active ester method, acid anhydride method or azide method, etc., which are selected as appropriate in consideration of their high reactivity, racemization and other side reactions. do it.
- DCC dicyclohexylcarbodiimide
- a protective group is introduced into the amino group, carboxyl group and / or side chain functional group of the amino acid.
- These protecting groups are preferably those which are stable under the conditions in the condensation reaction and can be removed quickly when necessary. Further, it is preferable that the amino protecting group and the carboxyl protecting group can be selectively removed from each other.
- amino-protecting groups examples include benzyloxycarbonyl (Bz), t-butyloxycarbonyl (Boc), p-biphenylisopropyloxycarbonyl, 9-fluorenylmethyloxycarbonyl (Fmoc) and the like. it can.
- protecting group for the carboxy group examples include groups capable of forming an alkyl ester or a benzyl ester.
- the C-terminal carboxyl group is bonded to a carrier such as chlorotrityl resin, chloromethyl resin, oxymethyl resin or p-alkoxybenzyl alcohol resin, so the condensation reaction is not possible with a condensing agent such as carbodiimide. It is preferably carried out in the presence or with N-protected amino acid active esters or peptide active esters. After completion of the condensation reaction, the protecting group is removed. In the solid phase method, the bond between the C-terminus of the peptide and the resin is also cleaved.
- the chemically synthesized peptide is purified by, for example, ion exchange chromatography, high performance liquid chromatography (HPLC), reverse phase chromatography, affinity chromatography, Edman degradation method or gas chromatography mass spectrometry (GC-MS). Can be analyzed.
- the bacteriocin according to the first embodiment produced by such a peptide synthesis method or the like, or a genetic engineering method described later and a method using Lactobacillus rhamnosus KO1 strain or KO3 strain is a pharmaceutically acceptable bacteriocin. It can be used as an active ingredient of a composition for preventing, ameliorating and / or treating oral diseases according to Embodiment 2 described below, including derivatives of syn and the like.
- Embodiment 2 of the present invention relates to a composition for the prevention, amelioration and / or treatment of oral diseases, comprising as an active ingredient the bacteriocin according to Embodiment 1 described above and a pharmaceutically acceptable derivative thereof. . Since the composition for prevention, amelioration and / or treatment of oral disease according to the second embodiment has the bacteriocin according to the first embodiment and a pharmaceutically acceptable derivative thereof as active ingredients, Has similar characteristics.
- the amino acid sequences and characteristics of bacteriocins Kog1 and Kog2 described in Embodiment 1 will be briefly described.
- the amino acid sequences have a high proportion of basic amino acids and hydrophobic amino acids. Since this feature is similar to an antibacterial peptide derived from a mammal, there is a low possibility that resistant bacteria are generated.
- the isoelectric point is 12 or more and a highly basic antibacterial peptide is obtained, cytotoxicity is reduced.
- it has the outstanding antimicrobial force. For details on the effects of Kog1 or Kog2, see the examples described later.
- oral disease means a disease in the oral cavity caused by, for example, caries, periodontal, and / or Candida.
- caries disease decayed tooth
- gingivitis gingivitis
- periodontitis gingivitis
- glossitis gingivitis
- cough ulcer cough ulcer
- Examples of carious bacteria include Streptococcus mutans and Streptococcus sobrinus .
- the periodontal bacteria for example, Aggregatibacter actinomycetemcomitans Hudoe001 (Aggregatibacter actinomycetemcomitans Hudoe001), Porphyromonas gingivalis (Porphyromonas gingivalis), Prevotella intermedia (Prevotella intermedia), Treponema Dentikora (Treponema denticola ), Tannerella forsythensis (Tannerella forsythensis), mention may be made of Actinobacillus actinomycetemcomitans (Actinobacillus actinomycetemcomitans) or Fusobacterium nucleatum (Fusobacterium nucleatum) and the like.
- Examples of Candida bacteria include Candida albicans , Candida glabrata, and Candida tropicalis .
- composition for prevention, amelioration and / or treatment of oral disease is preferably a composition which is a growth inhibitor of the aforementioned caries, periodontal and / or Candida.
- Specific examples include foods, pharmaceuticals, and oral compositions that can suppress the growth of cariogenic bacteria, periodontal disease bacteria, and / or Candida bacteria.
- compositions for preventing, improving and / or treating intraoral diseases are used to adjust various foods, pharmaceuticals or oral compositions. You may combine things suitably.
- the bacteriocin and the composition may be used as a derivative or salt form.
- Derivatives may include peptide derivatives such as partially substituted bacteriocin or addition compounds. More specifically, for example, derivatives in which a carboxyl group is amidated or acylated can be exemplified.
- salt forms inorganic acid salts such as hydrochloride, nitrate or hydrobromide, or organic acid salts such as p-toluenesulfonate, metasulfonate, fumarate, succinate or lactate Etc.
- the content of the bacteriocin according to Embodiment 1 as an active ingredient and the daily dose are appropriately adjusted depending on the type of the composition and the like. It is possible.
- Embodiment 3 of the present invention relates to a gene encoding the bacteriocin according to Embodiment 1 described above.
- Specific examples include a gene and a polynucleotide having the base sequence (and / or its complementary strand) described in SEQ ID NO: 3 (Kog1) or SEQ ID NO: 4 (Kog2).
- a gene having the nucleotide sequence set forth in SEQ ID NO: 3 (Kog1) or SEQ ID NO: 4 (Kog2) can be obtained from a Lactobacillus rhamnosus KO1 strain or KO3 strain using a conventional method by those skilled in the art. It is possible to separate and purify and extract DNA. Further, for example, DNA synthesis may be performed artificially using a DNA synthesis kit or the like.
- the gene sequence obtained by DNA synthesis using separation / purification or a kit can be used as a recombinant expression vector used for producing the bacteriocin according to Embodiment 1 described above in the genetic engineering method.
- Embodiment 4 relates to a recombinant expression vector obtained by incorporating the gene of Embodiment 3 described above.
- the recombination method may be any method used by those skilled in the art.
- a method for constructing a recombinant expression vector for example, first, a gene having a base sequence of SEQ ID NO: 3 (Kog1) or SEQ ID NO: 4 (Kog2) is synthesized.
- a recombinant expression vector having a gene construct for expression is constructed according to the host cell.
- the recombinant expression vector constructed in this way is introduced into a predetermined host cell so that it can be expressed.
- the introduction method may be any method used by those skilled in the art.
- the fifth embodiment relates to a host cell that holds the recombinant expression vector.
- the host cell is a bacterium.
- lactic acid bacteria, Escherichia coli or yeast can be mentioned.
- Embodiment 6 relates to a transformant transformed with the recombinant expression vector. That is, for example, a transformed cell in which transformation has occurred in a host cell having the above-described recombinant expression vector of Embodiment 5.
- the transformant is a bacterium.
- lactic acid bacteria Escherichia coli, yeast and the like can be mentioned. These bacteria are cultured under predetermined conditions. As a result, the expression and production of the bacteriocin according to Embodiment 1 described above in the host cell (bacteria) becomes possible and can be easily extracted and purified in large quantities.
- the detailed production method is almost the same as that in the case of culturing the lactic acid bacterium Lactobacillus rhamnosus in Embodiment 7 to be described later, so please refer to it.
- Embodiment 7 of the present invention relates to a method for producing bacteriocin according to Embodiment 1 described above using Lactobacillus rhamnosus.
- the Lactobacillus rhamnosus includes a step of cultivating Lactobacillus rhamnosus and a step of extracting the bacteriocin according to Embodiment 1 from the cell culture obtained by the culturing step.
- the Lactobacillus rhamnosus is Lactobacillus rhamnosus KO3 strain and / or a novel lactic acid strain Lactobacillus rhamnosus KO1 strain.
- the Lactobacillus rhamnosus KO1 and KO3 strains are, for example, inoculated into MRS medium sterilized at 121 ° C. for 20 minutes, pre-cultured at 37 ° C. for 48 hours in the atmosphere, distilled water, ultrapure water or buffer solution After washing with, etc., the cells can be collected by centrifugation or the like to obtain bacterial cells.
- various media such as a fruit juice medium, a vegetable juice medium, a milk medium, a skim milk medium, a medium containing milk components, or a semi-synthetic medium not containing milk components can be used.
- a reduced skim milk medium obtained by reducing skim milk and heat sterilization a skim milk medium added with yeast extract, an MRS medium, or a GAM medium can be used.
- the culture method is not particularly limited as long as the Lactobacillus rhamnosus grows well, such as static culture, neutralized culture with a constant pH, rotational culture, or continuous culture.
- the detailed bacteriological properties of the Lactobacillus rhamnosus KO3 strain are almost the same as the detailed bacteriological properties of the novel lactic acid strain Lactobacillus rhamnosus KO1 strain described later in Embodiment 8.
- Candida killed bacteria in the culturing step because Kog1 and Kog2 can be obtained in a larger amount (see Example 6).
- Lactobacillus rhamnosus KO1 strain Lactobacillus rhamnosus KO1 strain (Application for Deposit on January 24, 2011 to the Patent Microorganism Depositary of the National Institute of Technology and Evaluation) was deposited from the human oral cavity by the inventor as the deposit number NITE P-1065. It is a newly isolated and identified lactic acid strain.
- the Lactobacillus rhamnosus KO1 strain like the Lactobacillus rhamnosus KO3 strain, is classified into a Lactobacillus genus rhamnosus that produces Kog1 and Kog2, but a novel lactic acid bacterium with different expression levels and genome information of various proteins. Is a stock.
- Lactobacillus rhamnosus KO1 strain shows 100% homology between the nucleotide sequence of 16S rRNA and the nucleotide sequence of Lactobacillus rhamnosus strainIDCC3201 and 1443/1443, and the appearance of Gram-positive bacilli under the microscope after Gram staining It was identified as a Lactobacillus rhamnosus species.
- the bacteriological properties of the Lactobacillus rhamnosus KO1 strain are characterized by gram-positive lactobacilli, homo-type lactic acid fermentation, catalase negative, no spore-forming ability, culturable under aerobic conditions, and forming exopolysaccharides And
- Candida, caries, and periodontal bacteria include Candida albicans GDH18 strain, Streptococcus sobrinus B-13 strain, Streptococcus mutans NCTC 10449 strain, Streptococcus mutans Ingbritt strain, Porphyromonas gingivalis strain Hudoi001, and Aggregate bacter actinomycetemcomitans Hudoe001 strain was used, and each test strain was provided by the National University of Japan Hiroshima University Dental School and Dental Hospital.
- Candida albicans GDH18 strain was precultured under aerobic conditions at 37 ° C. for 24 hours using SD medium (Difco).
- Streptococcus sobrinus B-13 strain, Streptococcus mutans NCTC 10449 strain and Streptococcus mutans Ingbritt strain were prepared using TSB medium (Difco) supplemented with 5% yeast extract (Difco) at 37 degrees for 24 hours.
- Pre-culture was performed under atmospheric conditions.
- Porphyromonas gingivalis strain Hudoi001 and Aggregatebacter actinomycetemcomitans Hudoe001 strain were prepared using BHI medium (Difco) supplemented with hemin (5 mg / L) and vitamin K3 (1 mg / L).
- Pre-culture was performed under anaerobic conditions using the Anaero Pack TM System (Mitsubishi Gas Chemical Co., Ltd.) at 37 degrees for 96 hours.
- Candida, caries, and periodontal bacteria are collected by centrifugation at 1000 ⁇ g, washed twice with 1 mM, pH 6.8 phosphate buffer, and finally concentrated.
- the suspension of Streptococcus strains was also sonicated.
- Example 1 relates to the synthesis of Kog1 and Kog2.
- Kog1 having the amino acid sequence shown in SEQ ID NO: 1 and Kog2 having the amino acid sequence shown in SEQ ID NO: 2 are protected with 9-fluorenylmethyloxycarbonyl as a protecting group.
- synthesized by the tea bag method (the method of Helmerhorst et al. (1999)) using p-benzoyloxybenzyl alcohol as a resin. After completion of the basic antibacterial peptide, cleavage from the resin and side-chain deprotection were performed using a mixture of 5% thioanisole, 5% phenol, 5% purified water and 85% trifluoroacetic acid.
- hBD2 human ⁇ -defensin-2 (see Eur J., 2002, Oral Sci. (109), 121-124)) is well known as a basic antibacterial peptide, and has an isoelectric point of about 10 It is.
- Example 2 This Example 2 relates to analysis of the antibacterial activity of Kog1 and Kog2 against Candida albicans GDH18 strain.
- the antibacterial activity was evaluated by a method with some modifications to the method of Edgerton et al. (1998).
- 1 mM phosphate containing 0 to 25 ⁇ M of Kog1 or Kog2 synthesized in the above-mentioned Example 1 was added to 20 ⁇ l of the suspension of Candida albicans GDH18 strain cultured and prepared by the method described in the above Preparation Example. Mix in 20 ml buffer and incubate for 90 minutes at 37 degrees with shaking. As a control, only 20 ml of 1 mM phosphate buffer was used. The reaction was stopped by adding 360 ml of YNB medium (Difco), and the number of surviving bacteria was determined by counting colony forming units (CFUs) together with those of the control. That is, the percentage was calculated using the formula (CFUs of suspension containing Kog1 or Kog2 / CFUml ⁇ 1 of suspension of control) ⁇ 100.
- FIG. 1 is a view showing the antibacterial activity of Kog1 against Candida albicans GDH18 strain at 0.39 to 25 ⁇ M according to Example 2.
- FIG. 2 is a diagram showing the antibacterial activity of Kog2 against Candida albicans GDH18 strain at 0.39 to 12 ⁇ M according to Example 2. As shown in FIGS. 1 and 2, both Cog1 and Kog2 killed 100% of Candida albicans GDH18 strain at a peptide concentration of 0.39 ⁇ M.
- amphotericin B which is an antifungal agent
- lactoferricin B which is an antimicrobial peptide derived from milk
- histatin 5 which is an antimicrobial peptide derived from human saliva (sequence)
- JH8194 having the amino acid sequence described in SEQ ID NO: 7
- JH8194 having the amino acid sequence described in SEQ ID NO: 7
- the antibacterial peptides Kog1 and Kog2 can kill Candida at a lower concentration than any of these antifungal agents and antibacterial peptides, that is, in a small amount.
- Example 3 relates to the analysis of the antibacterial activity of Kog1 and Kog2 against Streptococcus sobrinus B-13 strain. Specifically, examples are shown in which antibacterial activity is compared with hBD2 and lysozyme protein (Lysozyme).
- Streptococcus sobrinus B-13 strain was cultured and prepared by the method described in the preparation examples.
- the antibacterial activity was evaluated using the same method as in Example 2 described above. In addition, it evaluated about the case where the density
- FIG. 3 is a graph showing the antibacterial activity of Kog1, Kog2 and other antibacterial peptides according to Example 3 against Streptococcus sobrinus B-13 strain.
- the peptide concentration (concentration of peptide) on the horizontal axis in FIG. 3 is indicated on the logarithmic axis.
- hBD2 killed 100% of Streptococcus sobrinus B-13 at a concentration of 3.125 ⁇ M. Lysozyme protein could not completely kill Streptococcus sobrinus B-13.
- Kog1 had a concentration of 1.56 ⁇ M and Kog2 had a concentration of 0.39 ⁇ M, and 100% of Streptococcus sobrinus B-13 was killed. Therefore, it was proved that even when the test strain was Streptococcus sobrinus B-13, it could be killed at a low concentration.
- Example 4 relates to the analysis of the antibacterial activity of Kog1 and Kog2 related to Streptococcus mutans. Specifically, as in Example 3 described above, an example in which hBD2 and lysozyme protein are compared with antibacterial activity is shown.
- Streptococcus mutans NCTC10449 strain and Streptococcus mutans Ingbritt strain were cultured and prepared by the method of the preparation example described above.
- the antibacterial activity was evaluated and compared using the same method as in Example 3 described above.
- about all the mutans bacteria it evaluated and compared in the case where the density
- FIG. 4 is a diagram showing the antibacterial activity of Kog1, Kog2 and other antibacterial peptides according to Example 4 against Streptococcus mutans NCTC10449 strain.
- FIG. 5 shows the antibacterial activity of Kog1, Kog2 and other antibacterial peptides according to Example 4 against Streptococcus mutans Ingbritt strain.
- the peptide concentration (Concentration of peptide) on the horizontal axis in FIGS. 4 and 5 is indicated on the logarithmic axis.
- FIG. 4 and FIG. 5 again, regarding mutans, it is estimated that Kog1 and Kog2 can kill a large amount of mutans at a relatively low concentration compared to other antimicrobial peptides. .
- Example 5 Furthermore, the present inventor also analyzed the antibacterial activity against other periodontal disease bacteria.
- Example 5 relates to analysis of antibacterial activity of bacteriocins Kog1 and Kog2 related to periodontal disease bacteria Aggregate bacter actinomycetemcomitans Hudoe001 strain. Specifically, examples are shown in which antibacterial activity is compared with hBD2 and histatin 5 as described above, and lactoferricin B and lactoferricin H (human-derived lactoferricin).
- Aggregate bacter actinomycetemcomitans Hudoe001 strain was cultured and prepared by the method of the preparation example described above.
- the antibacterial activity was evaluated and compared using the same method as in Example 3 described above.
- FIG. 6 is a diagram showing the antibacterial activity of Kog1, Kog2 and other antibacterial peptides according to Example 5 against Aggregate bacter actinomycetemcomitans Hudoe001 strain.
- the peptide concentration (concentration of peptide) on the horizontal axis in FIG. 6 is indicated on the logarithmic axis.
- 100% of the periodontal fungus Aggregatibacter actinomycetemcomitans Hudoe001 was killed at Kog1 of 3.13 ⁇ M and Kog2 of 1.56 ⁇ M. This is equivalent to or better than lactoferricin B or hBD2.
- Example 6 relates to the cultivation of Lactobacillus rhamnosus KO1 strain while adding Candida killed bacteria. Specifically, Lactobacillus rhamnosus KO1 strain was cultured in the absence and presence of killed Candida albicans GDH18 strain, and the expression levels of Kog1 and Kog2 were measured by a DNA microarray system.
- FIG. 7 is a diagram showing the expression level of Kog1 on a DNA microarray in Lactobacillus rhamnosus KO1 strain to which Candida killed bacteria according to Example 6 was added.
- FIG. 8 is a diagram showing the expression level of Kog2 on a DNA microarray in Lactobacillus rhamnosus KO1 strain to which Candida killed bacteria according to Example 6 was added. 7 and FIG. 8, depending on the amount of Candida (CaGDH18) killed in the presence of Candida (CaGDH18), compared to the culture of only the leftmost KO1 strain (from the left 2, 4 and 6 ⁇ g), the expression levels of both Kog1 and Kog2 were increased.
- bacteriophage having excellent antibacterial activity can also be obtained by culturing bacteria such as lactic acid bacteria or Escherichia coli transformed with a recombinant expression vector obtained by incorporating a gene encoding the bacteriocin Kog1 or Kog2. It will be appreciated by those skilled in the art that thin Kog1 or Kog2 can be produced easily and in large quantities.
- Example 7 In this Example 7, the breadth of the antibacterial spectrum of bacteriocins Kog1 and Kog2 proved in Examples 1 to 6 and the difficulty of generating resistant bacteria due to the basic isoelectric point were examined. The present inventor predicted that bacteriones Kog1 and Kog2 may inactivate LPS possessed by gram-negative bacteria such as periodontal disease bacteria, and analyzed the relationship between LPS and bacteriocin Kog1 and Kog2. did.
- RPMI 1640 medium supplemented with 10% FBS (Fetal Bovine Serum) (Biological industries, Haemek, Israel), 1% antibiotics, and 1% L-glutamine was used.
- FBS Fetal Bovine Serum
- the bacteriocin Kog1 or Kog2 is the same as that used in Example 1, and in an Eppendorf tube, Porphyromonas gingivalis LPS (InvivoGen) (hereinafter, P.g-LPS) is used under the following four conditions. Incubation was performed at 37 ° C. in a 5% CO 2 gas phase with the same medium as described above for 2 hours.
- P.g-LPS Porphyromonas gingivalis LPS
- FIG. 9 is a diagram showing the amount of ccl2 secreted according to the relationship between the LPS and the amount of Kog1 according to Example 7. That is, the amount of secreted chemokine ccl2 when LPS and Kog1 were incubated for 2 hours (100% when Kog1 is 0 ⁇ M is shown) (LPS + kog1 ⁇ cell ccl2).
- * (significance level) p ⁇ 0.05
- ** (significance level) p ⁇ 0.01
- n 3.
- the amount of secreted chemokine ccl2 decreased as the amount of Kog1 added increased. That is, it was found that bacteriocin Kog1 has an LPS inactivating action.
- FIG. 10 is a graph showing the amount of TNF- ⁇ secreted according to the relationship between the LPS and the amount of Kog1 according to Example 7. That is, it shows the amount of secreted cytokine TNF- ⁇ when LPS and Kog1 are incubated for 2 hours (100% when Kog1 is 0 ⁇ M) (LPS + kog1 ⁇ cell TNF- ⁇ ). ).
- the amount of secreted cytokine TNF- ⁇ decreased as the amount of Kog1 added increased. That is, it was found that bacteriocin Kog1 has an LPS inactivating effect, similar to the results shown in FIG.
- FIG. 11 is a diagram showing the amount of ccl2 secreted according to the relationship between the LPS and the amount of Kog2 according to Example 7. That is, it shows the amount of secreted chemokine ccl2 when LPS and Kog2 are used for incubation for 2 hours (the case where Kog2 is 0 ⁇ M is 100%) (LPS + kog2 ⁇ cell ⁇ ccl2).
- * (significance level) p ⁇ 0.05
- ** (significance level) p ⁇ 0.01
- n 3.
- FIG. 12 is a graph showing the amount of TNF- ⁇ secreted according to the relationship between LPS and Kog2 amount according to Example 7. That is, it shows the amount of secreted cytokine TNF- ⁇ when LPS and Kog2 are used for incubation for 2 hours (100% when Kog2 is 0 ⁇ M) (LPS + kog2 ⁇ cell TNF- ⁇ ). ).
- the added amount of Kog2 is small (5 ⁇ M)
- the added amount of secreted cytokine TNF- ⁇ increases, but when the added amount exceeds a certain amount, the added amount increases. This suggests that the amount of TNF- ⁇ decreases. That is, it was found that the addition of a large amount has an LPS inactivation effect, similar to the results shown in FIG.
- FIG. 13 is a diagram showing the relationship with various diseases caused by LPS. As shown in FIG. 13, LPS, which is an endotoxin, is involved in many diseases or therapeutic mechanisms via various substances.
- Example 8 Therefore, the present inventor examined whether Kog2 affects osteoblast differentiation in addition to oral diseases by real-time quantitative RT (Reverse transcriptase) -PCR.
- mouse-derived osteoblast-like cells As the cells, mouse-derived osteoblast-like cells, MC3T3-E1 cells, were used.
- the MC3T3-E1 cells were treated with 10% FBS (Biological industries, Haemek, Israel), L-glutamine, antibiotic mixture (Invitrogen), 50 ⁇ g / ml ascorbic acid (Sigma), and Kog2 at 0 nM, 250 nM, 500 nM or 1000 nM.
- FBS Biological industries, Haemek, Israel
- L-glutamine antibiotic mixture
- 50 ⁇ g / ml ascorbic acid Sigma
- Kog2 at 0 nM, 250 nM, 500 nM or 1000 nM.
- ⁇ -MEM ⁇ -modified Eagle's medium
- Type-I collagen used the forward primer shown in SEQ ID NO: 8, the reverse primer shown in SEQ ID NO: 9, and the probe shown in SEQ ID NO: 10.
- the forward primer shown in SEQ ID NO: 11 the reverse primer shown in SEQ ID NO: 12, and the probe shown in SEQ ID NO: 13 were used.
- FIG. 14 is a diagram showing the value of Type-I collagen / ⁇ -actin of real-time quantitative RT-PCR according to Example 8.
- the value of Type I collagen / ⁇ -actin increased almost three times when Kog2 was added at 250 nM compared to when Kog2 was not added at all (ctrl (0 ⁇ M)). It was.
- Example 9 Furthermore, the present inventor investigated whether or not bacteriocins Kog1 and Kog2 have the same antibacterial activity even when heated by boiling experiments.
- Example 9 antibacterial activity was examined for Candida albicans MYA274 strain.
- Candida albicans MYA274 strain was pre-cultured at 37 ° C. for 24 hours using Sabouraud Dextrose Broth (Difco), washed twice with MQ water, and 0.3 (1.0 OD 600). ⁇ 10 7 cells / ml).
- Example 9 bacteriocin Kog1 or Kog2, or Lactobacillus rhamnosus KO1 strain or KO3 strain was not used directly, but a lactic acid bacteria medium containing Lactobacillus rhamnosus KO3 strain, 8020 yogurt (drink type ) was used to conduct the experiment. Specifically, the 8020 yogurt (drink type) is cultured at 35 degrees for 2 days by adding 1% Lactobacillus rhamnosus KO3 strain and 1% YF-L811 starter to 15% skim milk + 3% glucose medium. It is a thing.
- raw materials include fructose, glucose liquid sugar, dairy products, sugar, stabilizer (pectin), sour and flavor, Brix 17.4%, lactate acidity 0.57%, pH 3.96, the non-fat milk solid content is adjusted to 3.0%.
- the three types of samples are 1) 1 ml of Sabouraud Broth, 1 ml of supernatant B and 50 ⁇ l of the above-mentioned Candida albicans MYA274 strain preparation, and 2) 1 ml of Sabouraud Broth, 1 ml of supernatant Boil And 50 ml of the above-mentioned Candida albicans MYA274 strain preparation solution, 3) 1 ml of Sabouraud broth as a control, 1 ml of 15% skim milk + 3% glucose medium and 50 ⁇ l of the above-mentioned Candida albicans MYA274 preparation solution Is included.
- FIG. 15 is a diagram showing the results of heat resistance data by the boiling experiment according to Example 9.
- the heat resistance data is obtained by preparing four samples for each sample and calculating an average value ⁇ SD.
- the amount of ATP similar to that of the supernatant B is measured even in the supernatant Boil boiled at 100 degrees for 20 minutes, the boiled supernatant Boil has the same high antibacterial property as the supernatant B. It was confirmed. That is, it was confirmed that bacteriocin Kog1 and Kog2 have the same antibacterial activity even when heated.
- SEQ ID NO: 1 Kog1 having the amino acid sequence described in 2 and Kog2 having the amino acid sequence described in SEQ ID NO: 2 function as a bacteriocin having a wide antibacterial spectrum, high antibacterial activity at low concentrations, and low possibility of causing resistant bacteria. I found out.
- a bacteriocin that can be easily produced in large quantities, has a wide antibacterial spectrum, and is less likely to cause resistant bacteria
- the bacteriocin pharmaceutically acceptable derivative
- a composition for the prevention, amelioration and / or treatment of oral diseases, which comprises an active ingredient), a gene encoding the bacteriocin, a recombinant expression vector obtained by incorporating the gene, and the recombinant expression vector A host cell, a transformant transformed with the recombinant expression vector, and a method for producing the bacteriocin can be provided.
- the novel lactic acid bacterium Lactobacillus rhamnosus KO1 strain which produces this bacteriocin can also be provided.
- the bacteriocin according to the present invention has high heat resistance, industrial processing becomes easy.
- gummy jelly, troches, tablets, candy, chewing gum, etc. are accompanied by heat during the molding process, and therefore, when using the bacteriocin according to the present invention having heat resistance, it becomes possible to process without reducing the antibacterial effect. .
- the bacteriocin effect is not lost, so that it is expected to lead to various uses.
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Abstract
Description
ラクトバチルス・ラムノーサス(Lactobacillus rhamnosus)を培養する培養工程と、
前記培養工程によって得られた菌体培養物から、第1の態様に係るバクテリオシンを抽出する抽出工程と、
を含むことを特徴とする。
本発明の実施の形態1に係るバクテリオシンは、特定のアミノ酸配列を有し、特定の効果をもたらし、特定の特徴を有する塩基性抗菌ペプチドに関する。より具体的には、本明細書における「バクテリオシン」とは、配列番号1に記載のアミノ酸配列を有する塩基性抗菌ペプチド(Kog1)、または、配列番号2に記載のアミノ酸配列を有する塩基性抗菌ペプチド(Kog2)を挙げることができる。さらに、配列番号1および配列番号2に記載のアミノ酸配列を有する塩基性抗菌ペプチドにおいて、1もしくは数個のアミノ酸が欠失、置換、挿入および/または付加されており、抗菌活性をもたらし、かつ等電点が12以上である塩基性抗菌ペプチドも含まれる。「数個」とは、2ないし8個、好ましくは2ないし6個、より好ましくは2ないし5個、さらに好ましくは2ないし4個である。
本発明の実施の形態2は、前述の実施の形態1に係るバクテリオシンおよびその薬学的に許容される誘導体等を有効成分とする、口腔内疾患の予防、改善および/または治療用組成物に関する。本実施の形態2に係る口腔内疾患の予防、改善および/または治療用組成物は、前述の実施の形態1に係るバクテリオシンおよびその薬学的に許容される誘導体等を有効成分としている為、同様の特性を有する。
本発明の実施の形態3は、前述の実施の形態1に係るバクテリオシンをコードする遺伝子に関する。具体的には、例えば、配列番号3(Kog1)または配列番号4(Kog2)に記載の塩基配列(および/またはその相補鎖)を有する遺伝子、ポリヌクレオチドを挙げることができる。
分離精製またはキット等を用いDNA合成した遺伝子配列は、前述の実施の形態1に係るバクテリオシンを遺伝子工学的方法において産生する際に用いる、組み換え発現ベクターに利用することができる。本実施の形態4は、前述の実施の形態3の遺伝子を組み込んで得られる、組み換え発現ベクターに関する。当該組み換え方法は、当業者が利用する任意の方法で構わない。組み換え発現ベクターの構築方法としては、例えば、まず、配列番号3(Kog1)または配列番号4(Kog2)の塩基配列を有する遺伝子の合成を行う。次に、合成した遺伝子と当該遺伝子を宿主細胞内で発現させる為の種々の調節エレメント(プロモーター、リボゾーム結合部位、ターミネーター、エンハンサーおよび/または発現レベルを制御する種々のシスエレメント等)とからなる、発現用遺伝子構築物を有する組み換え発現ベクターを宿主細胞に応じて構築する。
このようにして構築した組み換え発現ベクターは、所定の宿主細胞に発現可能に導入される。当該導入方法は、当業者が利用する任意の方法で構わない。本実施の形態5は、該組み換え発現ベクターを保有する、宿主細胞に関する。好ましくは、宿主細胞は、細菌である。例えば、乳酸菌、大腸菌または酵母等を挙げることができる。さらに、実施の形態6は、該組み換え発現ベクターにより形質転換された形質転換体に関する。すなわち、例えば、前述の実施の形態5の組み換え発現ベクターを保有する宿主細胞において形質転換が起こった形質転換細胞が挙げられる。好ましくは、形質転換体は、細菌である。前述と同様に、例えば、乳酸菌、大腸菌または酵母等を挙げることができる。これらの細菌を所定の条件で培養する。これにより、前述の実施の形態1に係るバクテリオシンの宿主細胞(細菌)内での発現および産生が可能となり、容易にかつ大量に抽出、精製することができる。詳細な生産方法については、後述の実施の形態7での乳酸菌ラクトバチルス・ラムノーサスを培養する場合とほぼ同様であるため、参照されたい。
本発明の実施の形態7は、ラクトバチルス・ラムノーサスを用いる、前述の実施の形態1に係るバクテリオシンの生産方法に関する。
ラクトバチルス・ラムノーサスKO1株(独立行政法人製品評価技術基盤機構特許微生物寄託センターに2011年1月24日に寄託申請し受託番号NITE P-1065として受託)は、本発明者によってヒトの口腔内から新規に分離同定された乳酸菌株である。なお、ラクトバチルス・ラムノーサスKO1株は、ラクトバチルス・ラムノーサスKO3株と同様、Kog1およびKog2を産生するラクトバチルス属ラムノーサス種に分類されるが、種々のタンパク質の発現量およびゲノム情報が異なる新規な乳酸菌株である。
本調製例では、被験菌株の調製・培養方法について説明する。
本実施例1は、Kog1およびKog2の合成に関する。
本実施例2は、カンジダ・アルビカンスGDH18株に対するKog1およびKog2の抗菌力の分析に関する。
本実施例3は、ストレプトコッカス・ソブリナスB-13株に対するKog1およびKog2の抗菌力の分析に関する。具体的には、hBD2およびリゾチームタンパク(Lysozyme)と抗菌力を比較した実施例を示す。
本実施例4は、ストレプトコッカス・ミュータンス菌に係るKog1およびKog2の抗菌力の分析に関する。具体的には、前述の実施例3と同様に、hBD2およびリゾチームタンパクと抗菌力を比較した実施例を示す。
さらに、本発明者はその他の歯周病菌に対する抗菌力についても分析した。本実施例5は、歯周病菌アグリゲイティバクター・アクチノミセテムコミタンスHudoe001株に係るバクテリオシンKog1およびKog2の抗菌力の分析に関する。具体的には、前述と同様のhBD2およびヒスタチン5、さらにラクトフェリシンBおよびラクトフェリシンH(ヒト由来ラクトフェリシン)と抗菌力を比較した実施例を示す。
本実施例6は、カンジダの死菌を添加しながらのラクトバチルス・ラムノーサスKO1株の培養に関する。具体的には、カンジダ・アルビカンスGDH18株の死菌の非存在下および存在下において、ラクトバチルス・ラムノーサスKO1株を培養し、Kog1およびKog2の発現量をDNAマイクロアレイシステムによって測定した。
本実施例7では、実施例1ないし6において証明された、バクテリオシンKog1およびKog2の抗菌スペクトルの広さ、および塩基性の等電点による耐性菌の生じ難さについて検討した。なお、本発明者は、バクテリシオンKog1およびKog2が、歯周病菌等のグラム陰性菌の持つLPSを不活性化しているのではないかと予測し、LPSとバクテリオシンKog1およびKog2との関係について分析した。
そこで、本発明者は、口腔内疾患以外にも、Kog2が骨芽細胞の分化に影響を与えるか否かをreal-time quantitative RT(Reverse transcriptase)-PCRによって調べた。
さらに、本発明者は、バクテリオシンKog1およびKog2が加熱された場合でも同様の抗菌力を有するか否かを煮沸実験によって調べた。
Claims (13)
- 配列表の配列番号1もしくは配列番号2に示すアミノ酸配列、または、配列表の配列番号1もしくは配列番号2に示すアミノ酸配列において1もしくは数個のアミノ酸が欠失、置換、挿入および/もしくは付加され抗菌活性をもたらすアミノ酸配列を有し、かつ等電点が12以上であることを特徴とする、バクテリオシン。
- 前記バクテリオシンは、う蝕菌、歯周病菌およびカンジダ菌の全てに対して抗菌性を有することを特徴とする、請求項1に記載のバクテリオシン。
- 請求項1または2に記載のバクテリオシン、または、前記バクテリオシンにおいて薬学的に許容される誘導体もしくは薬学的に許容される塩類を有効成分とすることを特徴とする、口腔内疾患の予防、改善および/または治療用組成物。
- 前記口腔内疾患の予防、改善および/または治療用組成物は、う蝕菌、歯周病菌および/またはカンジダ菌の増殖抑制剤であることを特徴とする、請求項3に記載の口腔内疾患の予防、改善および/または治療用組成物。
- 請求項1または2に記載のバクテリオシンをコードすることを特徴とする、遺伝子。
- 請求項5に記載の遺伝子を組み込んで得られることを特徴とする、組み換え発現ベクター。
- 請求項6に記載の組み換え発現ベクターを保有することを特徴とする、宿主細胞。
- 請求項6に記載の組み換え発現ベクターにより形質転換されたことを特徴とする、形質転換体。
- 前記形質転換体は、細菌であることを特徴とする、請求項8に記載の形質転換体。
- ラクトバチルス・ラムノーサス(Lactobacillus rhamnosus)を培養する培養工程と、
前記培養工程によって得られた菌体培養物から、請求項1または2に記載のバクテリオシンを抽出する抽出工程と、
を含むことを特徴とする、バクテリオシンの生産方法。 - 前記ラクトバチルス・ラムノーサス(Lactobacillus rhamnosus)は、ラクトバチルス・ラムノーサス(Lactobacillus rhamnosus)KO1株(独立行政法人製品評価技術基盤機構特許微生物寄託センターに2011年1月24日に寄託申請し受託番号NITE P-1065として受託)、および/または、ラクトバチルス・ラムノーサス(Lactobacillus rhamnosus)KO3株(独立行政法人製品評価技術基盤機構特許微生物寄託センターに2009年6月10日に寄託申請し受託番号NITE BP-771として受託)であることを特徴とする、請求項10に記載のバクテリオシンの生産方法。
- 前記培養工程において、カンジダ菌の死菌を添加することを特徴とする、請求項10または11に記載のバクテリオシンの生産方法。
- 独立行政法人製品評価技術基盤機構特許微生物寄託センターに2011年1月24日に寄託申請し受託番号NITE P-1065として受託されたことを特徴とする、ラクトバチルス・ラムノーサス(Lactobacillus rhamnosus)KO1株。
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK12745195.3T DK2682463T3 (en) | 2011-02-10 | 2012-02-09 | BACTERIOCIN DERIVATED BY LACTOBACILLUS RHAMNOSUS |
EP12745195.3A EP2682463B1 (en) | 2011-02-10 | 2012-02-09 | Bacteriocin derived from lactobacillus rhamnosus |
JP2012556935A JP5907490B2 (ja) | 2011-02-10 | 2012-02-09 | ラクトバチルス・ラムノーサス由来のバクテリオシン |
CN201280008481.XA CN103748220B (zh) | 2011-02-10 | 2012-02-09 | 来源于鼠李糖乳杆菌的细菌素 |
KR1020137023858A KR101675525B1 (ko) | 2011-02-10 | 2012-02-09 | 락토바실러스 람노서스 유래의 박테리오신 |
ES12745195T ES2698421T3 (es) | 2011-02-10 | 2012-02-09 | Bacteriocina derivada de lactobacillus rhamnosus |
US13/984,783 US20140128314A1 (en) | 2011-02-10 | 2012-02-09 | Bacteriocin Derived from Lactobacillus Rhamnosus |
US14/707,956 US9314498B2 (en) | 2011-02-10 | 2015-05-08 | Bacteriocin derived from Lactobacillus rhamnosus |
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KR (1) | KR101675525B1 (ja) |
CN (1) | CN103748220B (ja) |
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Cited By (4)
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CN103766217A (zh) * | 2013-12-11 | 2014-05-07 | 柳州赛特生物科技研发中心 | 一种蝴蝶兰专用组织培养培养基 |
US9314498B2 (en) | 2011-02-10 | 2016-04-19 | Hiroshima University | Bacteriocin derived from Lactobacillus rhamnosus |
JP2018100228A (ja) * | 2016-12-19 | 2018-06-28 | 国立大学法人広島大学 | 抗菌用組成物、食品、及び菌体若しくは菌体培養物又はこれらの抽出物の製造方法 |
CN117801080A (zh) * | 2024-01-24 | 2024-04-02 | 东北农业大学 | 一种干酪乳杆菌细菌素及其应用 |
Families Citing this family (6)
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CN104726360A (zh) * | 2014-11-14 | 2015-06-24 | 北京农学院 | 一种大肠杆菌和乳酸杆菌穿梭载体的构建及应用 |
CN108048347B (zh) * | 2017-12-06 | 2020-06-02 | 河北一然生物科技有限公司 | 鼠李糖乳杆菌、鼠李糖乳杆菌制剂及其用途 |
WO2019155002A1 (en) * | 2018-02-08 | 2019-08-15 | Institut Pasteur | Anti-prevotella bacteriocin methods and compositions |
CN108148789B (zh) * | 2018-03-06 | 2021-05-25 | 河南科技学院 | 一种鼠李糖乳杆菌及其在制备细菌素中的应用 |
CN109266568A (zh) * | 2018-08-19 | 2019-01-25 | 东北农业大学 | 一种具有高产细菌素的益生功能鼠李糖乳杆菌及其应用 |
CN114874296B (zh) * | 2022-04-30 | 2023-09-08 | 浙江工商大学 | 抗耐药性金黄色葡萄球菌的细菌素的分离纯化方法 |
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JP2005281225A (ja) * | 2004-03-30 | 2005-10-13 | Japan Science & Technology Agency | 新規塩基性抗菌ペプチド及びその利用 |
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DK2682463T3 (en) | 2011-02-10 | 2018-12-03 | Univ Hiroshima | BACTERIOCIN DERIVATED BY LACTOBACILLUS RHAMNOSUS |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9314498B2 (en) | 2011-02-10 | 2016-04-19 | Hiroshima University | Bacteriocin derived from Lactobacillus rhamnosus |
CN103766217A (zh) * | 2013-12-11 | 2014-05-07 | 柳州赛特生物科技研发中心 | 一种蝴蝶兰专用组织培养培养基 |
CN103766217B (zh) * | 2013-12-11 | 2015-10-28 | 柳州赛特生物科技研发中心 | 一种蝴蝶兰专用组织培养培养基 |
JP2018100228A (ja) * | 2016-12-19 | 2018-06-28 | 国立大学法人広島大学 | 抗菌用組成物、食品、及び菌体若しくは菌体培養物又はこれらの抽出物の製造方法 |
CN117801080A (zh) * | 2024-01-24 | 2024-04-02 | 东北农业大学 | 一种干酪乳杆菌细菌素及其应用 |
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KR20130119979A (ko) | 2013-11-01 |
US20150238565A1 (en) | 2015-08-27 |
EP2682463B1 (en) | 2018-08-29 |
ES2698421T3 (es) | 2019-02-04 |
JP5907490B2 (ja) | 2016-04-26 |
DK2682463T3 (en) | 2018-12-03 |
CN103748220A (zh) | 2014-04-23 |
US20140128314A1 (en) | 2014-05-08 |
US9314498B2 (en) | 2016-04-19 |
EP2682463A1 (en) | 2014-01-08 |
JPWO2012108518A1 (ja) | 2014-07-03 |
KR101675525B1 (ko) | 2016-11-11 |
CN103748220B (zh) | 2020-06-12 |
EP2682463A4 (en) | 2014-11-26 |
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