WO2023074820A1 - SARS-CoV-2増殖抑制剤 - Google Patents
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- WO2023074820A1 WO2023074820A1 PCT/JP2022/040242 JP2022040242W WO2023074820A1 WO 2023074820 A1 WO2023074820 A1 WO 2023074820A1 JP 2022040242 W JP2022040242 W JP 2022040242W WO 2023074820 A1 WO2023074820 A1 WO 2023074820A1
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/135—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
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12C—BEER; PREPARATION OF BEER BY FERMENTATION; PREPARATION OF MALT FOR MAKING BEER; PREPARATION OF HOPS FOR MAKING BEER
- C12C5/00—Other raw materials for the preparation of beer
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12G—WINE; PREPARATION THEREOF; ALCOHOLIC BEVERAGES; PREPARATION OF ALCOHOLIC BEVERAGES NOT PROVIDED FOR IN SUBCLASSES C12C OR C12H
- C12G2200/00—Special features
- C12G2200/21—Wine additives, e.g. flavouring or colouring agents
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12G—WINE; PREPARATION THEREOF; ALCOHOLIC BEVERAGES; PREPARATION OF ALCOHOLIC BEVERAGES NOT PROVIDED FOR IN SUBCLASSES C12C OR C12H
- C12G3/00—Preparation of other alcoholic beverages
- C12G3/02—Preparation of other alcoholic beverages by fermentation
Definitions
- the present invention relates to SARS-CoV-2 growth inhibitors and COVID-19 prevention agents.
- Non-Patent Document 1 Due to the global spread of the novel coronavirus (SARS-CoV-2), public interest in therapeutic agents, vaccines, diagnostic agents, etc. for SARS-CoV-2 infectious disease (COVID-19) is increasing. Vaccination has made it possible to avoid aggravation after infection, but it has not completely prevented SARS-CoV-2 infection, and there are cases where even vaccinated people are infected due to the emergence of mutant strains. is acknowledged to a lesser extent. Therefore, there is an urgent need to develop prophylactic drugs against SARS-CoV-2. Currently, 8 drugs including dexamethasone are indicated for SARS-CoV-2 in Japan, and no prophylactic drug has been approved so far (Non-Patent Document 1).
- the purpose of the present invention is to provide a novel SARS-CoV-2 growth inhibitor and a novel COVID-19 prevention agent.
- the present inventors have found that the culture supernatant of plasmacytoid dendritic cells (pDC) obtained by culturing with the addition of Lactococcus lactis subspecies lactis, which is a type of lactic acid bacterium, is SARS-CoV-2. It was found to suppress proliferation.
- the present invention is based on this finding.
- a SARS-CoV-2 growth inhibitor containing lactic acid bacteria as an active ingredient [2] The growth inhibitor according to [1] above, wherein the lactic acid bacterium can activate plasmacytoid dendritic cells (pDC) and induce at least interferon (IFN) production. [3] The growth inhibitor according to [1] or [2] above, wherein the lactic acid bacterium is Lactococcus lactis subspecies lactis. [4] The growth inhibitor according to any one of [1] to [3] above, wherein the lactic acid bacterium is Lactococcus lactis subspecies lactis JCM 5805.
- [5] The growth inhibitor according to any one of the above [1] to [4], which is a COVID-19 onset preventive agent.
- [6] The growth inhibitor according to any one of [1] to [5] above, which is in the form of a food composition.
- [7] The growth inhibitor according to [6] above, wherein the food composition is a beverage or a supplement.
- [8] The growth inhibitor according to any one of [1] to [5] above, which is in the form of a pharmaceutical composition.
- SARS-CoV-2 growth inhibitor COVID-19 onset preventive agent or COVID-19 symptom alleviating agent
- SARS-CoV-2 growth inhibitor COVID-19 onset preventive agent or COVID-19
- a lactic acid bacterium or a composition comprising it for use in suppressing SARS-CoV-2 proliferation, preventing the onset of COVID-19, or alleviating symptoms of COVID-19.
- a method for suppressing SARS-CoV-2 proliferation comprising ingesting or administering an effective amount of lactic acid bacteria or a composition comprising the same to a subject in need thereof, onset of COVID-19 Methods of prevention or alleviation of COVID-19 symptoms.
- Lactic acid bacteria which are the active ingredients of the present invention, are one of the food ingredients that have been eaten safely together with fermented foods since ancient times. Therefore, the agent of the present invention can be used as a functional food or pharmaceutical that imparts a SARS-CoV-2 growth inhibitory effect or a COVID-19 onset preventive effect, and is safe for mammals including humans. It is advantageous in that it can In particular, the agent of the present invention is advantageous in that it can be ingested daily as a food, and can easily suppress SARS-CoV-2 growth and prevent the onset of COVID-19.
- FIG. 1 shows the concentration (pg/ml) of interferon- ⁇ (IFN- ⁇ ) in the culture supernatant when lactic acid bacteria were added to plasmacytoid dendritic cells (pDC) derived from donor 1 or donor 2.
- Lactic acid bacteria- and lactic acid bacteria + in the figure indicate culture supernatants obtained without addition of lactic acid bacteria to pDC and culture supernatants obtained by adding lactic acid bacteria to pDC, respectively.
- FIG. 2 shows changes in the amount of SARS-CoV-2 virus RNA when Vero cells (FIG. 2A) or Calu-3 cells (FIG. 2B) were infected with the virus.
- the vertical axis indicates the amount of SARS-CoV-2 virus RNA in the culture supernatant, and the horizontal axis indicates the number of days after infection.
- NC and PC in the figure indicate the negative control and positive control, respectively. Each indicates the obtained culture supernatant.
- the SARS-CoV-2 proliferation inhibitor and the COVID-19 onset preventive agent of the present invention (hereinafter, the two may be collectively referred to as the "agent of the present invention") contain lactic acid bacteria as an active ingredient.
- Lactic acid bacteria which are the active ingredient of the present invention, can activate plasmacytoid dendritic cells (pDC) and can induce at least interferon (IFN) production.
- Lactic acid bacteria having the property of inducing IFN- ⁇ production of 50 pg/mL or more, preferably 100 pg/mL or more when added to peripheral blood mononuclear cell-derived plasmacytoid dendritic cell (pDC) culture can be used. can.
- the lactic acid bacteria of the present invention can induce any of Type I IFN (type I interferon), Type II IFN (type II interferon), and Type III IFN (type III interferon).
- Type I IFN refers to cytokines that are effective against viral infections, including IFN- ⁇ (1, 2, 4, 5, 6, 7, 8, 10, 13, 14, 16, 17, 21), IFN- ⁇ , etc. is included.
- Type II IFN contains IFN- ⁇
- Type III IFN contains IFN- ⁇ .
- the lactic acid bacterium of the present invention preferably has a Type I IFN production-inducing activity.
- Type I IFN and Type III IFN When pDC is activated by the lactic acid bacterium of the present invention, cell projections characteristic of activated dendritic cells appear, the production of Type I IFN and Type III IFN is induced, and furthermore, NK cells and Th1 cells produce Production of Type II IFNs such as IFN- ⁇ can also be induced.
- the IFN that can be induced to be produced by the lactic acid bacterium, which is the active ingredient of the present invention is not particularly limited, but is preferably one or more selected from the group consisting of IFN- ⁇ , IFN- ⁇ and IFN- ⁇ . Two or more selected from the group consisting of ⁇ , IFN- ⁇ and IFN- ⁇ are more preferred, and two or more selected from the group consisting of IFN- ⁇ , IFN- ⁇ and IFN- ⁇ Furthermore, it is more preferable that at least one of the two or more IFNs is IFN- ⁇ , and particularly preferably at least two of the two or more IFNs are IFN- ⁇ and IFN- ⁇ .
- the lactic acid bacteria which are the active ingredients of the present invention, can activate pDC and induce at least interferon (IFN) production can be determined, for example, by culturing the candidate lactic acid bacteria in the presence of bone marrow cells of mammals such as mice. Alternatively, it may be determined whether the pDCs are activated and induced to produce IFN. For example, the IFN- ⁇ concentration in the culture medium can be measured by ELISA or the like. Suspended in RPMI medium (manufactured by SIGMA) to a concentration of 5 ⁇ 10 5 cells/mL, Flt-3L was added as a pDC-inducing cytokine to the resulting cell suspension at a final concentration of 100 ng/ml.
- IFN interferon
- the lactic acid strain was added at 10 ⁇ g/ml, the culture supernatant was collected after 48 hours, and the IFN- ⁇ concentration in the culture supernatant was measured. It can be measured by ELISA using an IFN- ⁇ measurement kit (PBL).
- Lactic acid bacteria which are the active ingredient of the present invention, are not particularly limited, but include lactic acid bacteria, such as Lactococcus genus, Leuconostoc genus, Pediococcus genus, Examples include lactic acid bacteria belonging to the genus Streptococcus and Enterococcus .
- the lactic acid bacterium that is the active ingredient of the present invention is preferably a lactic acid bacterium belonging to the genus Lactococcus or Pediococcus.
- Lactococcus bacteria examples include, for example, Lactococcus lactis , Lactococcus lactis subsp. lactis , Lactococcus garvieae , Lactococcus lactis subspecies Cremoris ( Lactococcus lactis subsp. cremoris ) , Lactococcus lactis subsp. to Lactococcus lactis subspecies lactis.
- Lactococcus bacteria include Lactococcus lactis subspecies lactis JCM 5805, Lactococcus lactis subspecies lactis NBRC 12007, Lactococcus lactis subspecies lactis NRIC 1150, Lactococcus ⁇ Lactococcus subspecies lactis JCM 20101, Lactococcus lactis subspecies lactis JCM 7638, Lactococcus lactis subspecies lactis ATCC 11454, Lactococcus garviae NBRC 100934, Lactococcus lactis subspecies cremoris JCM 16167, Lactococcus lactis subspecies cremoris NBRC 100676, Lactococcus lactis subspecies Holdoniae JCM 1180 and Lactococcus lactis subsp.
- Lactococcus lactis subspecies lactis JCM 5805 is preferable from the viewpoint of being able to induce at least interferon (
- Leuconostoc bacteria include, for example, Leuconostoc lactis. Specific examples of Leuconostoc bacteria include Leuconostoc lactis NBRC 12455 and the like.
- Pediococcus bacteria include, for example, Pediococcus acidilactici , Pediococcus pentosaceus , Pediococcus cellicola , Pediococcus claussenii ), Pediococcus damnosus , Pediococcus ethanolidurans, Pediococcus inopinatus , Pediococcus parvulus , Pediococcus sti Lessy ( Pediococcus stilesii ) and the like.
- Specific examples of Pediococcus bacteria include Pediococcus acidilactici JCM 8797, Pediococcus Damnosus JCM 5886, and the like.
- Streptococcus bacteria examples include Streptococcus thermophilus.
- lactic acid bacteria can be obtained from known depository institutions. From chome 1 1), the NBRC strain is from the National Institute of Technology and Evaluation Biological Resources Division (2-5-8 Kazusa Kamatari, Kisarazu City, Chiba Prefecture), and the NRIC strain is from the Tokyo University of Agriculture strain
- the ATCC strain can be obtained from the preservation room (1-1-1 Sakuragaoka, Setagaya-ku, Tokyo), respectively, from the American type culture collection (USA).
- the lactic acid bacteria used as active ingredients in the present invention include cultures of lactic acid bacteria.
- a culture is defined as a live cell, a dead cell, a crushed product of a live or dead cell, a lyophilized product of a live or killed cell, a crushed product of the freeze-dried product, a live cell or a dead cell.
- Killed cells can be obtained, for example, by heat treatment, treatment with drugs such as antibiotics, treatment with chemical substances such as formalin, treatment with ultraviolet rays, and treatment with radiation such as gamma rays.
- the DNA or RNA of the lactic acid bacterium is also included in the lactic acid bacterium culture. It is believed that the DNA or RNA of the lactic acid bacteria can activate pDC and induce IFN production.
- the processed material includes, for example, heated cells (dead cells), freeze-dried products thereof, and cultures containing these, and further includes a solution of bacteria disrupted by ultrasonic waves or the like, and an enzyme-treated solution of bacteria.
- the treated product includes a treated product obtained by removing the cell wall by enzymatic or mechanical means.
- nucleic acid-containing fractions obtained by lysing bacteria with a surfactant or the like and then precipitating them with ethanol or the like are also included.
- the bacterial cells may also contain dead cells.
- the culture of lactic acid bacteria can be performed by a known method using a known medium.
- a known medium MRS medium, GAM medium and LM17 medium can be used, and inorganic salts, vitamins, amino acids, antibiotics, serum and the like may be added as appropriate. Cultivation may be performed at 25 to 40° C. for several hours to several days.
- the lactic acid bacteria are collected by centrifugation or filtration. When used as dead bacteria, they may be sterilized and inactivated by an autoclave or the like.
- the lactic acid bacteria which are the active ingredients of the present invention, are preferably taken orally because it reduces the burden of ingestion for obtaining the SARS-CoV-2 growth inhibitory effect and the COVID-19 onset preventive effect on the living body.
- Such lactic acid bacteria are highly resistant to gastric juice and intestinal juice, and preferably have strong acid resistance, for example.
- Lactic acid bacteria are not particularly limited, and both live and dead bacteria can be used. Bacteria are preferred.
- the lactic acid bacteria which are the active ingredients of the present invention, can activate pDC and at least induce IFN production, and IFN is not directly administered to the living body.
- Direct administration of IFN to a living body can be oral administration or parenteral administration.
- IFN when IFN is directly orally administered to a living body, IFN has low resistance to gastric juice and intestinal juice, and is likely to be decomposed and absorbed into the living body as IFN.
- subcutaneous administration can be used, but it is reported that the intake burden is high and side effects (fever, headache, depression, etc.) may occur.
- the lactic acid bacteria which are the active ingredients of the present invention, can be taken orally with a reduced administration burden, can reduce the possibility of side effects, and have an inhibitory effect on the growth of SARS-CoV-2 and COVID-19. It can be said that it is superior to direct administration of IFN to the living body in terms of the onset prevention effect.
- the agent of the present invention can be provided in the form of a composition containing lactic acid bacteria.
- the agent of the present invention can be provided by mixing lactic acid bacteria with other ingredients (eg, food ingredients, food additives, supplement ingredients, formulation additives).
- the content of lactic acid bacteria in the composition can be determined based on the mode of provision of the agent and the effective intake amount described later, but the lower limit (or more or more) is, for example, 0.01% by mass, 0 .1% by weight, 1% by weight, 10% by weight or 20% by weight, and the upper limit (or less or less) is, for example, 100% by weight, 90% by weight, 80% by weight, 70% by weight, 60% by weight, % or 50% by mass or less.
- the content of lactic acid bacteria in the composition can be, for example, 0.01 to 90% by mass or 0.1 to 50% by mass.
- compositions for suppressing the growth of SARS-CoV-2 a composition for preventing the onset of COVID-19, and a composition for alleviating symptoms of COVID-19, which contain lactic acid bacteria, are provided.
- the composition of the invention can be carried out according to the description of the agent of the invention.
- the culture supernatant of plasmacytoid dendritic cells (pDC) obtained by culturing with the addition of Lactococcus lactis subspecies lactis, which is a type of lactic acid bacterium, is SARS- It exerted a growth inhibitory effect against CoV-2. This effect was confirmed in SARS-CoV-2 susceptible cells pretreated with pDC culture supernatant. Therefore, in the present invention, lactic acid bacteria can be used as an active ingredient for suppressing the growth of SARS-CoV-2 and can be used as an active ingredient for preventing the onset of COVID-19.
- Lactococcus lactis subspecies lactis which is a kind of lactic acid bacteria, can exert an INF- ⁇ production-inducing effect on the body even when orally ingested (Japanese Patent Application Laid-Open No. 2017-201984). For this reason, oral intake of lactic acid bacteria exerts anti-SARS-CoV-2 effects including induction of INF- ⁇ production in vivo, suppressing the growth of SARS-CoV-2 and preventing the onset of COVID-19. .
- SARS-CoV-2 exists not only in the originally discovered virus strain, but also in variants thereof (eg, B.1.1.7 strain (alpha strain), B.1.351 strain (beta strain), P. 1 strain (Gamma strain), B.1.617.2 strain (Delta strain), B.1.1.529 strain (Omicron strain)).
- SARS-CoV-2 is synonymous with severe acute respiratory syndrome coronavirus-2
- SARS-CoV-2 infection (disease caused by infection with SARS-CoV-2 and symptoms) is called COVID-19.
- the agent of the present invention can be provided in the form of foods, pharmaceuticals, quasi-drugs, feed (including pet food), additives, etc., and can be implemented according to the following description.
- the active ingredient of the present invention can be orally ingested by humans and non-human animals, and a typical ingestion form is food (eg, food composition).
- food eg, food composition
- the active ingredient of the present invention can be provided as it is as food, or it can be provided by incorporating it into food.
- the food thus provided is a food containing an effective amount of the active ingredient of the present invention.
- the phrase "contains an effective amount" of the active ingredient of the present invention means that the active ingredient of the present invention is ingested within the range described below when the amount normally consumed in each food is ingested. content.
- food includes health food, functional food, nutritional supplement, food with health claims (e.g., food for specified health use, food with nutrient function claims, food with function claims), food for special dietary use (e.g., infant food, It is used in the sense of including food for pregnant women, food for sick people) and supplements.
- health food functional food, nutritional supplement
- food with health claims e.g., food for specified health use, food with nutrient function claims, food with function claims
- food for special dietary use e.g., infant food, It is used in the sense of including food for pregnant women, food for sick people
- the active ingredient of the present invention has the SARS-CoV-2 growth inhibitory effect and the COVID-19 onset preventive effect as described above, it can be provided by being contained in foods that are taken daily.
- the agent of the present invention can be provided in unit packaging form in which the amount to be ingested per meal is predetermined.
- the unit packaging form for one meal includes, for example, a form in which a fixed amount is defined by a pack, package, can, bottle, or the like.
- the intake per meal can be determined according to the daily intake of the active ingredient of the present invention, which will be described later.
- the food of the present invention may be provided with a package containing instructions on the intake amount, or may be provided with a document or the like describing the instructions.
- the unit packaging form of the agent of the present invention can contain the active ingredient of the present invention at the daily intake for humans described below, or from 1/2 of the daily intake for humans described below.
- the active ingredient of the present invention can be included in one-sixth the amount.
- the agent of the present invention is preferably provided in a unit packaging form per meal (i.e., a unit packaging form per day) in which the intake per meal is the effective daily intake.
- the form of the "food” is not particularly limited, and may be, for example, a beverage form, a semi-liquid or gel form, a solid form or a powder form.
- a “supplement” a tablet manufactured by adding excipients, binders, etc. to the active ingredient of the present invention and kneading and then tableting, and adding excipients, binders, etc. to the active ingredient of the present invention Examples include granules produced by granulation, orally disintegrating tablets, and capsules in which the active ingredient of the present invention is encapsulated.
- Foods provided by the present invention are not particularly limited as long as they contain the active ingredient of the present invention.
- Non-alcoholic beverages such as non-alcoholic beer-taste beverages
- Carbohydrate-containing foods and beverages such as rice, noodles, bread and pasta
- Dairy products such as cream
- Western confectionery such as cookies, cakes and chocolates
- Japanese confectionery such as manju and sweet bean jelly
- whiskey, bourbon, spirits, liqueurs, wine, fruit wine, Japanese sake, Chinese sake, shochu, beer, non-alcoholic beer with an alcohol content of 1% or less, low-malt beer, other miscellaneous liquor, chuhai Alcoholic beverages
- Tea beverages include fermented tea, semi-fermented tea, and unfermented tea, such as black tea, green tea, barley tea, brown rice tea, sencha, gyokuro tea, roasted tea, oolong tea, turmeric tea, pu-erh tea, and rooibos tea. , rose tea, chrysanthemum tea, ginkgo biloba tea, herbal tea (eg, mint tea, jasmine tea).
- fruits used in fruit juice-containing beverages and fruit and vegetable juice-containing beverages include apples, mandarin oranges, grapes, bananas, pears, peaches, mangoes, acai, blueberries, and plums.
- vegetables used in vegetable juice-containing beverages and fruit and vegetable juice-containing beverages include tomatoes, carrots, celery, pumpkins, cucumbers, and watermelons.
- Oral preparations include granules, powders, tablets (including sugar-coated tablets), pills, capsules, syrups, liquids, jellies, emulsions and suspensions.
- Parenteral agents include injections suitable for local administration (including intradermal, subcutaneous, intramuscular, and intravenous injections), inhalants (e.g., inhalation aerosols, inhalation powders, and inhalation liquids), and drops.
- Nasal agents eg, nasal powders, nasal solutions), ointments, creams, gels, suppositories, patches, poultices.
- compositions can be formulated using a pharmaceutically acceptable carrier by a method commonly practiced in the art.
- Pharmaceutically acceptable carriers include excipients, binders, diluents, additives, perfumes, buffers, thickeners, colorants, stabilizers, emulsifiers, dispersants, suspending agents, preservatives, etc. is mentioned.
- the virus binds and adsorbs to the ACE2 receptor (angiotensin converting enzyme 2) on the cell surface, and using this as a foothold, the virus enters the cell, leading to infection.
- ACE2 receptor angiotensin converting enzyme 2
- the pharmaceuticals and quasi-drugs of the present invention can be formulated into formulations intended for administration to tissues with high ACE2 receptor expression.
- Tissues with high ACE2 receptor expression include respiratory organs (e.g., nasal cavity, pharynx, larynx, trachea, bronchi, and lungs). It can be formulated into formulations (eg, inhalants, aerosols, nose drops).
- respiratory organs e.g., nasal cavity, pharynx, larynx, trachea, bronchi, and lungs. It can be formulated into formulations (eg, inhalants, aerosols, nose drops).
- the active ingredient of the present invention when the active ingredient of the present invention is provided as food, pharmaceuticals, or quasi-drugs, it can also be used as a COVID-19 symptom-alleviating agent. That is, by taking the active ingredient of the present invention before or after infection with SARS-CoV-2 (preferably early after infection, more preferably within 5 days after infection), the infection (COVID-19) Alleviation of symptoms (in particular, alleviation of aggravation of the infection) is expected.
- the active ingredient of the present invention When providing the active ingredient of the present invention as an additive, it can be carried out in accordance with the above descriptions regarding foods, pharmaceuticals, quasi-drugs, and feed.
- the active ingredient of the present invention When the active ingredient of the present invention is provided as a food additive, the active ingredient of the present invention has a SARS-CoV-2 growth inhibitory effect or a COVID-19 onset preventive effect and can be used as a functional ingredient. .
- the intake amount of the active ingredient of the present invention can be determined depending on the recipient's sex, age and weight, symptoms, intake time, dosage form, intake route, drugs to be combined, and the like.
- the daily intake of the active ingredient of the present invention for adults can be specified, for example, by the number of bacteria, and the lower limit (or more or more) is 1 x 10 8 , 1 x 10 9 or 1 x 10 10 and the upper limit (below or less than) can be 1 ⁇ 10 14 , 1 ⁇ 10 13 , and 1 ⁇ 10 12 .
- These upper and lower limits can be combined arbitrarily, and the intake range is, for example, 1 ⁇ 10 8 to 1 ⁇ 10 14 pieces, 1 ⁇ 10 9 to 1 ⁇ 10 13 pieces or 1 ⁇ 10 It can be 10 to 1 ⁇ 10 12 .
- the number of lactic acid bacteria can be measured by, for example, fluorescence staining, flow cytometry, and culture.
- the daily intake of the active ingredient of the present invention for adults can also be specified by the dry cell mass, the lower limit (or more or more) can be 1 mg, 10 mg, 25 mg, and the upper limit ( less or less) can be 1000 mg, 500 mg, 100 mg. These upper and lower limits can be combined arbitrarily, and the intake ranges can be, for example, 1 to 1000 mg, 10 to 500 mg, and 25 to 100 mg.
- the above intake amount of the active ingredient of the present invention and the following intake timing and intake period are applicable when the active ingredient of the present invention is used for both non-therapeutic and therapeutic purposes. can be read as administration.
- the active ingredient of the present invention can also be ingested by mammals other than humans (e.g., cows, horses, sheep, pigs, dogs, cats, etc.). It can be determined with reference to the description about.
- the intake period of the active ingredient of the present invention is, for example, one week or more, two weeks or more, at the above daily dose. , 3 weeks or longer, preferably 1 month or longer (4 weeks or longer).
- the intake interval of the active ingredient of the present invention can be once every three days, once every two days, or once a day, preferably once a day.
- the active ingredient of the present invention may also be taken before the event or time when SARS-CoV-2 growth inhibitory effect or COVID-19 onset preventive effect is expected.
- Examples of events that are expected to have the effect of suppressing SARS-CoV-2 growth or preventing the onset of COVID-19 include actions that may infect SARS-CoV-2 (e.g., participation in events with a high risk of infection,
- An example of the period when the SARS-CoV-2 growth inhibitory effect or COVID-19 prevention effect is expected is the SARS-CoV-2 epidemic season.
- the timing of ingestion before the event where the SARS-CoV-2 growth inhibitory effect or the COVID-19 onset preventive effect is expected, for example, 1 day or more, 3 days or more, 1 week or more, 2 weeks or more , 3 weeks or more, 1 month or more (4 weeks or more), or 2 months or more (8 weeks or more). Also, although not particularly limited, from the start of ingestion until the event where SARS-CoV-2 growth inhibitory effect or COVID-19 onset preventive effect is expected, depending on the case, while keeping an ingestion interval It can be taken continuously.
- the active ingredient of the present invention may also be taken after the event or time when SARS-CoV-2 growth inhibitory effect or COVID-19 onset preventive effect is expected.
- the timing of ingestion after the event in which the SARS-CoV-2 growth inhibitory effect or the COVID-19 onset preventive effect is expected for example, 1 day or more, 3 days or more, 1 week or more, 2 weeks or more is mentioned.
- ingesting after an event in which the SARS-CoV-2 growth inhibitory effect or COVID-19 onset preventive effect is expected in some cases, continue while keeping intervals between intakes It can also be ingested.
- SARS-CoV-2 proliferation comprising ingesting or administering to a subject in need thereof an effective amount of lactic acid bacteria or a composition comprising the same.
- SARS-CoV-2 growth inhibitors COVID- Provided is the use of lactic acid bacteria as an agent for preventing the onset of COVID-19 or for alleviating symptoms of COVID-19, or in a method of inhibiting SARS-CoV-2 proliferation, preventing the onset of COVID-19, or alleviating COVID-19 symptoms.
- the use of the invention can be carried out according to the description of the agent of the invention and the method of the invention.
- lactic acid bacteria are provided for use in suppressing SARS-CoV-2 proliferation, preventing the onset of COVID-19, or alleviating COVID-19 symptoms.
- the above lactic acid bacteria can be used according to the description regarding the agent of the present invention.
- non-therapeutic means not including an act of surgery, treatment or diagnosis of a human (that is, a medical act on a human), specifically, a doctor or a doctor's instruction means that it does not include methods of performing surgery, therapy or diagnosis on humans.
- Example 1 Study of inhibitory effect on SARS-CoV-2 proliferation
- pDC plasmacytoid dendritic cells
- Method a Isolation of plasmacytoid dendritic cells (pDC) Human peripheral blood mononuclear cells (hPBMC) derived from donor 1 and donor 2 by the magnetic bead method using EasySep Human Plasmacytoid DC Isolation Kit (manufactured by STEMCELL) (manufactured by iQ Bioscience) to isolate plasmacytoid dendritic cells (pDC).
- pDC plasmacytoid dendritic cells
- hPBMC Human peripheral blood mononuclear cells derived from donor 1 and donor 2 by the magnetic bead method using EasySep Human Plasmacytoid DC Isolation Kit (manufactured by STEMCELL) (manufactured by iQ Bioscience) to isolate plasmacytoid dendritic cells (pDC).
- B. pDC culture conditions The culture conditions for the pDCs (7 ⁇ 10 4 cells) isolated in the above a are as follows. RPMI-1640 medium (manufactured by Sigma-Aldrich) containing 10% FCS and 1% penicillin-streptomycin was used as the medium and seeded in a 96-well round-bottom plate (manufactured by CORNING). Then, heat-killed cells of Lactococcus lactis subsp. lactis JCM5805 strain ( Lactococcus lactis subsp.
- lactis as a lactic acid bacterium were adjusted to a concentration of 1 mg/ml with PBS (manufactured by TAKARA BIO), and the final concentration was was added to the medium at a concentration of 10 ⁇ g/ml (no lactic acid bacteria were added to the control), and cultured at 37° C. for 48 hours in a CO 2 incubator.
- SARS-CoV-2 RNA quantification Vero cells African green monkey kidney cell line, see Non-Patent Document 2, JCRB1819 VeroE6 / TMPRSS2 (JCRB cell bank) can be used) or Calu in a 96-well flat-bottom plate (manufactured by CORNING) -3 cells (human lung epithelial cell line, see Non-Patent Document 3, HTB-55 TM (ATCC) can be used) were seeded at 1 ⁇ 10 4 cells, and after 6 hours, the pDC culture supernatant of the above b (no addition of lactic acid bacteria (Control)) or with lactic acid bacteria) was added to the medium and pretreated at 37° C. for 18 hours in a CO 2 incubator.
- Real-time PCR analysis was performed using the QuantiTect Probe RT-PCR Kit (QIAGEN) and gene-specific SARS-CoV-2 primers according to the general reaction composition at 50°C for 30 minutes, 95°C for 15 seconds followed by 45 cycles of reaction were carried out at 95°C for 15 seconds and 60°C for 60 seconds.
- QIAGEN QuantiTect Probe RT-PCR Kit
- rIFN- ⁇ human recombinant interferon alpha
- Vero cells were more pretreated with pDC culture supernatant from donor 1 or donor 2 (with lactobacilli added (lactobacilli+)) than pretreated with rIFN- ⁇ (500 U/ml) (positive control (PC)). It was confirmed that the amount of SARS-CoV-2 virus RNA decreased with treatment (Fig. 2A).
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Abstract
Description
[1]乳酸菌を有効成分とする、SARS-CoV-2増殖抑制剤。
[2]乳酸菌が、プラズマサイトイド樹状細胞(pDC)を活性化し、かつ、少なくともインターフェロン(IFN)産生を誘導し得るものである、上記[1]に記載の増殖抑制剤。
[3]乳酸菌が、ラクトコッカス・ラクティス・サブスピーシーズ・ラクティスである、上記[1]または[2]に記載の増殖抑制剤。
[4]乳酸菌が、ラクトコッカス・ラクティス・サブスピーシーズ・ラクティスJCM 5805である、上記[1]~[3]のいずれかに記載の増殖抑制剤。
[5]COVID-19発症予防剤である、上記[1]~[4]のいずれかに記載の増殖抑制剤。
[6]食品組成物の形態である、上記[1]~[5]のいずれかに記載の増殖抑制剤。
[7]食品組成物が飲料またはサプリメントである、上記[6]に記載の増殖抑制剤。
[8]医薬組成物の形態である、上記[1]~[5]のいずれかに記載の増殖抑制剤。
[9]SARS-CoV-2増殖抑制剤、COVID-19発症予防剤またはCOVID-19症状緩和剤の製造のための、SARS-CoV-2増殖抑制剤、COVID-19発症予防剤またはCOVID-19症状緩和剤としての、あるいはSARS-CoV-2増殖抑制方法、COVID-19発症予防方法またはCOVID-19症状の緩和方法における、乳酸菌の使用。
[10]SARS-CoV-2増殖抑制、COVID-19発症予防またはCOVID-19症状の緩和に用いるための、乳酸菌またはそれを含んでなる組成物。
[11]有効量の乳酸菌またはそれを含んでなる組成物を、それを必要としている対象に摂取させるか、あるいは投与することを含んでなる、SARS-CoV-2増殖抑制方法、COVID-19発症予防方法またはCOVID-19症状の緩和方法。
例1では、乳酸菌を添加したプラズマサイトイド樹状細胞(pDC)の培養上清によるSARS-CoV-2増殖抑制効果について検討した。
ア プラズマサイトイド樹状細胞(pDC)の分離
EasySep Human Plasmacytoid DC Isolation Kit(STEMCELL社製)を用いた磁気ビーズ法によりドナー1およびドナー2由来のヒト末梢血単核細胞(hPBMC)(iQ Bioscience社製)からプラズマサイトイド樹状細胞(pDC)を分離した。
上記アで分離したpDC(7×104細胞)の培養条件は次の通りである。培地には10%FCS、1%ペニシリン-ストレプトマイシンを含有するRPMI-1640培地(Sigma-Aldrich社製)を使用し、96ウェル丸底プレート(CORNING社製)に播種した。そして、乳酸菌としてラクトコッカス・ラクティス・サブスピーシーズ・ラクティス JCM5805菌株(Lactococcus lactis subsp. lactis)の加熱死菌体を1mg/mlの濃度となるようにPBS(TAKARA BIO社製)で調整し、終濃度が10μg/mlとなるように培地に添加し(対照には乳酸菌は添加せず)、CO2インキュベータで37℃、48時間にて培養した。
上記イのpDCを培養した培養上清中のインターフェロン-α(IFN-α)濃度をHuman IFN-α ELISA Kit(PBL BIOMEDICAL LABORATORIES社製)を用いて測定した。
96ウェル平底プレート(CORNING社製)にVero細胞(アフリカミドリザル腎細胞株、非特許文献2参照、JCRB1819 VeroE6/TMPRSS2(JCRB細胞バンク)を利用可能)またはCalu-3細胞(ヒト肺上皮細胞株、非特許文献3参照、HTB-55TM(ATCC)を利用可能)を1×104個播種し、6時間後に上記イのpDC培養上清(乳酸菌添加なし(対照))または乳酸菌添加あり)を培地に添加し、CO2インキュベータで37℃、18時間前処理をした。前処理した細胞をPBSで洗浄し、1×102TCID50(Vero、MOI=0.01)または1×104TCID50(Calu-3、MOI=1)のSARS-CoV-2(wk-521株(国立感染症研究所)、非特許文献2参照)を感染させた。1時間後に細胞をPBSで洗浄し、感染後1~3日における培養上清中のSARS-CoV-2ウイルスのRNAをQIAamp Viral RNA Mini Kit(QIAGEN社製)を用いて抽出した。そして、抽出したRNAをリアルタイムPCR法により定量した。リアルタイムPCR解析は、QuantiTect Probe RT-PCR Kit(QIAGEN社製)および遺伝子特異的SARS-CoV-2プライマーを用い、一般的な反応組成に従って、50℃で30分間、95℃で15秒間、続いて95℃で15秒間、60℃で60秒間を45サイクル反応させた。ポジティブコントロールとして、ヒトリコンビナントインターフェロンアルファ(rIFN-α)500U/ml(2ng/ml相当)を含む培地で同様に前処理をした細胞を用いた。
結果は図1および2に示す通りであった。図1では、ドナー1およびドナー2由来のpDCのいずれにおいても、乳酸菌添加なし(乳酸菌-)(対照)に対して、乳酸菌添加あり(乳酸菌+)の方が培養上清中のインターフェロン-α(IFN-α)の濃度が増加することが確認された。図2では、乳酸菌を添加せずに得られたpDC培養上清(乳酸菌-)で前処理をしたVero細胞(図2A)およびCalu-3細胞(図2B)では、いずれもメディウムのみを添加した場合(陰性対照(NC))と同等のSARS-CoV-2ウイルスのRNA量であった。一方、乳酸菌を添加して得られたpDC培養上清(乳酸菌+)で前処理をしたVero細胞およびCalu-3細胞では、陰性対照群および乳酸菌非添加群と比較してSARS-CoV-2ウイルスのRNA量が顕著に減少することが確認された。特にVero細胞では、rIFN-α(500U/ml)で前処理した場合(陽性対照(PC))よりも、ドナー1またはドナー2由来のpDC培養上清(乳酸菌添加あり(乳酸菌+))で前処理した方がSARS-CoV-2ウイルスのRNA量が減少することが確認された(図2A)。
Claims (11)
- 乳酸菌を有効成分とする、SARS-CoV-2増殖抑制剤。
- 乳酸菌が、プラズマサイトイド樹状細胞(pDC)を活性化し、かつ、少なくともインターフェロン(IFN)産生を誘導し得るものである、請求項1に記載の増殖抑制剤。
- 乳酸菌が、ラクトコッカス・ラクティス・サブスピーシーズ・ラクティスである、請求項1または2に記載の増殖抑制剤。
- 乳酸菌が、ラクトコッカス・ラクティス・サブスピーシーズ・ラクティスJCM 5805である、請求項1または2に記載の増殖抑制剤。
- COVID-19発症予防剤である、請求項1または2に記載の増殖抑制剤。
- 食品組成物の形態である、請求項1または2に記載の増殖抑制剤。
- 食品組成物が飲料またはサプリメントである、請求項6に記載の増殖抑制剤。
- 医薬組成物の形態である、請求項1または2に記載の増殖抑制剤。
- SARS-CoV-2増殖抑制剤、COVID-19発症予防剤またはCOVID-19症状緩和剤の製造のための、SARS-CoV-2増殖抑制剤、COVID-19発症予防剤またはCOVID-19症状緩和剤としての、あるいはSARS-CoV-2増殖抑制方法、COVID-19発症予防方法またはCOVID-19症状の緩和方法における、乳酸菌の使用。
- SARS-CoV-2増殖抑制、COVID-19発症予防またはCOVID-19症状の緩和に用いるための、乳酸菌またはそれを含んでなる組成物。
- 有効量の乳酸菌またはそれを含んでなる組成物を、それを必要としている対象に摂取させるか、あるいは投与することを含んでなる、SARS-CoV-2増殖抑制方法、COVID-19発症予防方法またはCOVID-19症状の緩和方法。
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