MUSCLE ATROPHY PREVENTION AGENT
20230330165 · 2023-10-19
Assignee
Inventors
Cpc classification
A61K35/744
HUMAN NECESSITIES
C12R2001/46
CHEMISTRY; METALLURGY
A23L33/135
HUMAN NECESSITIES
International classification
A61K35/744
HUMAN NECESSITIES
Abstract
An object of the invention is to provide a novel technique for preventing muscle atrophy by directly promoting muscle synthesis or suppressing muscle degradation without through physical activity. An agent for preventing muscle atrophy containing a lactic acid bacterium having a muscle synthesis-promoting effect and/or a muscle degradation-suppressing effect, a treated product of the lactic acid bacterium or an extract thereof as an active ingredient in which the lactic acid bacterium having a muscle synthesis-promoting effect is Lactobacillus gasseri or the like and the lactic acid bacterium having a muscle degradation-suppressing effect is Lactobacillus reuteri or the like is provided.
Claims
1. An agent for preventing muscle atrophy comprising a lactic acid bacterium having a muscle synthesis-promoting effect and/or a muscle degradation-suppressing effect, a treated product of the lactic acid bacterium or an extract thereof as an active ingredient, wherein the lactic acid bacterium having a muscle synthesis-promoting effect is any one kind or more selected from the group consisting of Lactobacillus gasseri, Streptococcus thermophilus, Lactobacillus rhamnosus, Lactococcus lactis, Lactobacillus delbrueckii and Lactobacillus reuteri, and the lactic acid bacterium having a muscle degradation-suppressing effect is any one kind or more selected from the group consisting of Lactobacillus reuteri, Lactobacillus mucosae, Lactobacillus fermentum, Pediococcus acidilactici, Lactobacillus delbrueckii and Lactobacillus gasseri.
2. The agent for preventing muscle atrophy according to claim 1, wherein the lactic acid bacterium having a muscle synthesis-promoting effect is Lactococcus lactis subsp. cremoris or Lactococcus lactis subsp. lactis.
3. The agent for preventing muscle atrophy according to claim 1, wherein the lactic acid bacterium having a muscle synthesis-promoting effect is Lactobacillus gasseri strain SBT1848 (NITE BP-03075), Streptococcus thermophilus strain SBT1021A (FERM P-10658), Lactococcus lactis subsp. cremoris strain SBT1393 (NITE P-03278), Lactobacillus rhamnosus strain SBT2299 (NITE BP-02994), Lactococcus lactis subsp. lactis strain SBT2397 (NITE P-03080) or Lactobacillus reuteri strain SBT2970 (NITE BP-03282).
4. The agent for preventing muscle atrophy according to claim 1, wherein the lactic acid bacterium having a muscle degradation-suppressing effect is Lactobacillus reuteri strain SBT2970 (NITE BP-03282), Lactobacillus mucosae strain SBT2958 (NITE P-02803), Lactobacillus mucosae strain SBT10038 (NITE P-03283), Lactobacillus mucosae strain SBT10043 (NITE BP-03187), Lactobacillus fermentum strain SBT1846 (NITE P-03279), Lactobacillus fermentum strain SBT1859 (NITE P-02996), Pediococcus acidilactici strain SBT3331 (NITE BP-02991) or Lactobacillus gasseri strain SBT1848 (NITE BP-03075).
5. An agent for preventing muscle atrophy comprising a lactic acid bacterium having a muscle synthesis-promoting effect and a muscle degradation-suppressing effect, a treated product of the lactic acid bacterium or an extract thereof as an active ingredient.
6. The agent for preventing muscle atrophy according to claim 5, wherein the lactic acid bacterium having a muscle synthesis-promoting effect and a muscle degradation-suppressing effect is Lactobacillus delbrueckii, Lactobacillus gasseri or Lactobacillus reuteri.
7. The agent for preventing muscle atrophy according to claim 6, wherein the lactic acid bacterium having a muscle synthesis-promoting effect and a muscle degradation-suppressing effect is Lactobacillus delbrueckii subsp. lactis.
8. The agent for preventing muscle atrophy according to claim 6, wherein the lactic acid bacterium having a muscle synthesis-promoting effect and a muscle degradation-suppressing effect is Lactobacillus delbrueckii subsp. lactis strain SBT1371 (NITE BP-03277), Lactobacillus delbrueckii subsp. lactis strain SBT2002 (NITE BP-03280), Lactobacillus delbrueckii subsp. lactis strain SBT2080 (NITE BP-03281), Lactobacillus gasseri strain SBT1848 (NITE BP-03075) or Lactobacillus reuteri strain SBT2970 (NITE BP-03282).
9. A pharmaceutical product, a food or a drink, a food with a function claim, a food for a specified health use, a nutritional supplement, a supplement or feed for preventing muscle atrophy comprising the agent for preventing muscle atrophy according to claim 1.
10. Lactobacillus delbrueckii subsp. lactis strain SBT1371 (NITE BP-03277), Lactobacillus delbrueckii subsp. lactis strain SBT2002 (NITE BP-03280), Lactobacillus delbrueckii subsp. lactis strain SBT2080 (NITE BP-03281), Lactococcus lactis subsp. cremoris strain SBT1393 (NITE P-03278), Lactobacillus reuteri strain SBT2970 (NITE BP-03282), Lactobacillus mucosae strain SBT10038 (NITE P-03283) and Lactobacillus fermentum strain SBT1846 (NITE P-03279) which are novel lactic acid bacteria.
Description
BRIEF DESCRIPTION OF DRAWINGS
[0045]
[0046]
[0047]
DESCRIPTION OF EMBODIMENTS
[0048] The invention provides an agent for preventing muscle atrophy containing a lactic acid bacterium, a treated lactic acid bacterium product or an extract thereof (also simply referred to as a lactic acid bacterium or the like below) as an active ingredient.
[0049] The lactic acid bacterium or the like contained in the agent for preventing muscle atrophy of the invention is a specific lactic acid bacterium or the like having a muscle synthesis-promoting effect and is preferably obtained from any one kind or more selected from the group consisting of Lactobacillus gasseri, Streptococcus thermophilus, Lactobacillus rhamnosus, Lactococcus lactis, Lactobacillus delbrueckii and Lactobacillus reuteri.
[0050] Of these, Lactococcus lactis is further preferably Lactococcus lactis subsp. cremoris or Lactococcus lactis subsp. lactis.
[0051] Of the bacterial species, the lactic acid bacterium or the like is further preferably obtained from Lactobacillus gasseri strain SBT1848, Streptococcus thermophilus strain SBT1021A, Lactococcus lactis subsp. cremoris strain SBT1393, Lactobacillus rhamnosus strain SBT2299, Lactococcus lactis subsp. lactis strain SBT2397 or Lactobacillus reuteri strain SBT2970.
[0052] Moreover, the lactic acid bacterium or the like contained in the agent for preventing muscle atrophy of the invention is a specific lactic acid bacterium or the like having a muscle degradation-suppressing effect and is preferably obtained from any one kind or more selected from the group consisting of Lactobacillus reuteri, Lactobacillus mucosae, Lactobacillus fermentum, Pediococcus acidilactici, Lactobacillus delbrueckii and Lactobacillus gasseri.
[0053] Of the bacterial species, the lactic acid bacterium or the like is further preferably obtained from Lactobacillus reuteri strain SBT2970, Lactobacillus mucosae strain SBT2958, Lactobacillus mucosae strain SBT10038, Lactobacillus mucosae strain SBT10043, Lactobacillus fermentum strain SBT1846, Lactobacillus fermentum strain SBT1859, Pediococcus acidilactici strain SBT3331 or Lactobacillus gasseri strain SBT1848.
[0054] Furthermore, the lactic acid bacterium or the like contained in the agent for preventing muscle atrophy of the invention is a lactic acid bacterium or the like having a muscle synthesis-promoting effect and a muscle degradation-suppressing effect, and any lactic acid bacterium or the like having the effects can be used.
[0055] The lactic acid bacterium or the like having a muscle synthesis-promoting effect and a muscle degradation-suppressing effect is preferably obtained from Lactobacillus delbrueckii, Lactobacillus reuteri or Lactobacillus gasseri. Lactobacillus delbrueckii is further preferably obtained from Lactobacillus delbrueckii subsp. lactis.
[0056] Of the bacterial species, the lactic acid bacterium or the like is still further preferably obtained from Lactobacillus delbrueckii subsp. lactis strain SBT1371, Lactobacillus delbrueckii subsp. lactis strain SBT2002, Lactobacillus delbrueckii subsp. lactis strain SBT2080, Lactobacillus reuteri strain SBT2970 or Lactobacillus gasseri strain SBT1848.
[0057] The lactic acid bacterium or the like is preferably obtained from at least any of Lactobacillus delbrueckii subsp. lactis, Lactobacillus gasseri, Streptococcus thermophilus, Lactococcus lactis subsp. cremoris, Lactobacillus rhamnosus, Lactococcus lactis subsp. lactis, Lactobacillus reuteri, Lactobacillus mucosae, Lactobacillus fermentum and Pediococcus acidilactici, and one kind of the lactic acid bacteria or a mixture of more than one kind thereof can be used.
[0058] The lactic acid bacterium strains described above have been all deposited at NITE Patent Microorganisms Depositary (NPMD), National Institute of Technology and Evaluation. The information on deposit is described later in the specification.
[0059] The agent for preventing muscle atrophy in the invention has an action of preventing atrophy of muscles, and the presence or absence of an action of preventing muscle atrophy can be determined by the presence or absence of a muscle synthesis-promoting effect and/or a muscle degradation-suppressing effect.
[0060] The presence or absence of a muscle synthesis-promoting action can be determined, for example, by whether the subject lactic acid bacterium or the like increases the amount of phosphorylated p70S6K compared to that without the addition, as shown in the Examples described below.
[0061] The presence or absence of a muscle degradation-suppressing action can be determined, for example, by whether the subject lactic acid bacterium or the like decreases the gene expression levels of Atrogin-1 and MuRF1 compared to those without the addition, as shown in the Examples.
[0062] The medium for culturing the lactic acid bacterium according to the invention is not particularly limited as long as the lactic acid bacterium can be cultured in the medium, and any medium can be used.
[0063] The lactic acid bacterium according to the embodiment may be cultured in accordance with a general method for culturing a lactic acid bacterium, and a desired amount may be prepared. For example, lactic acid bacterium cells can be obtained by culturing the lactic acid bacterium using a synthetic medium such as MRS medium and centrifuging the obtained culture. The obtained bacterial cells may be used directly, or the bacterial cells may be used after subjecting to concentration, drying, lyophilization or fracturing. Dead bacterial cells obtained by heat drying the bacterial cells or the like can be used.
[0064] Because bacterial cells which have been subjected to concentration, drying, lyophilization or fracturing or dead bacterial cells obtained by heat drying or the like can be used as described above, the agent for preventing muscle atrophy of the embodiment can be widely used as a composition contained in a pharmaceutical product, a quasi-drug, a food or a drink, feed or the like.
[0065] For formulation, a generally used additive such as an excipient, a binder, a disintegrant and a flavoring agent may be appropriately mixed.
[0066] The food or the drink for preventing muscle atrophy of the invention may be a food or a drink containing the lactic acid bacterium or the like serving as an active ingredient and may be a food with a function claim, a food for a specified health use, a nutritional supplement, a supplement or the like. The food or the drink of the invention may be a milk beverage, yogurt, cheese, ice cream, a soft drink, butter, condensed milk, a cracker, infant formula, powdered formula, liquid formula, a condiment or the like. Moreover, the active ingredient of the invention may be added to an existing food or drink at the stage of raw materials, during the production or after the production. Furthermore, because the active ingredient of the invention is a lactic acid bacterium or the like, for example, the active ingredient itself of a fermented food obtained by fermentation with the lactic acid bacterium of the invention, such as yogurt, cheese and a milk beverage, is an example of the food or the drink for preventing muscle atrophy.
[0067] The amount of the agent for preventing muscle atrophy blended in such a food or a drink varies with the form, the dosage form, the symptom of the subject of administration, the body weight, the application or the like and thus is not particularly limited, but, for example, the agent can be blended at 0.001 to 100 (w/w)% if an example is to be given.
[0068] As the feed for preventing muscle atrophy, the active ingredient may be mixed in normal feed.
[0069] The subject of administration and the daily intake of the agent for preventing muscle atrophy according to the embodiment are not particularly limited, and the agent can be administered to a minor under the age of 20, an adult, an elderly person at the age of 65 or higher or the like, for example, when the subject of administration is a human. The daily intake varies with the age, the symptom, the body weight or the purpose and thus is not particularly limited, but, for example, the intake as the weight of the bacterial cells or the treated bacterial cells is 0.001 to 10 g, preferably 0.01 to 5 g if examples are to be given.
[0070] According to the embodiment, a novel agent for preventing muscle atrophy can be provided. The agent for preventing muscle atrophy contains a lactic acid bacterium or the like as an active ingredient, can be produced at a low price in a large volume and is highly safe. In particular, a lactic acid bacterium or the like which can promote muscle synthesis and suppress muscle degradation at the same time has a high effect of preventing muscle atrophy.
EXAMPLES
[0071] As Examples of the invention, the results of evaluation of the muscle synthesis-promoting effect and the muscle degradation-suppressing effect using mouse myoblast C2C12 cells are briefly explained below. However, the invention is not limited to the embodiments of the Examples.
[Preparation of Lactic Acid Bacterium Homogenates]
[0072] Glycerol stocks of bacterial strains were streaked on MRS medium plates and cultured at 37° C. for three nights (64 hours). Next, one colony obtained from each medium plate was inoculated in 10 mL of MRS medium and cultured at 37° C. or 30° C. one night (16 hours). The bacterial cell cultures in a volume of 300 μL were subcultured in 10 mL of fresh MRS medium and cultured again at 37° C. or 30° C. one night (16 hours). Next, 3 mL of the bacterial cell cultures were inoculated in 100 mL of MRS medium and cultured at 37° C. or 30° C. one night (16 hours). The obtained bacterial cell cultures were centrifuged, and the precipitated bacterial cells were washed with PBS and ultrapure water. The bacterial cells were re-suspended in 4 mL of ultrapure water and frozen at −80° C. Through lyophilization using a lyophilizer (Tokyo Rikakikai Co., Ltd.), lyophilized bacterial cells were obtained. The obtained lyophilized bacterial cells were dissolved in PBS or DMEM medium (gibco) and fractured using a multi-beads shocker (Yasui Kikai Corporation), and thus lactic acid bacterium homogenates were prepared.
[Test Example 1] Evaluation of P70S6K Phosphorylation-Enhancing Effect
[0073] Mouse myoblasts, C2C12 cells, were seeded on a 48-well culture plate (IWAKI) containing 10% FBS- and 1% penicillin-streptomycin-containing DMEM medium at 1.8×10.sup.4 cell/well. The cells were cultured under the conditions of 37° C. and 5% CO.sub.2 for two days to 80% to 90% confluency.
[0074] Next, the medium was replaced with FBS-free 1% penicillin-streptomycin-containing DMEM medium, and the cells were cultured for four hours. After the culture, the homogenates of the lactic acid bacteria shown in
[0075] ELISA was conducted using p70S6K (pT389) SimpleStep ELISA, which can detect phosphorylated p70S6K concentrations, and Pre-coated 384 well Microplate SimpleStep ELISA (abcam). The total protein concentrations of the cell solutions were determined by the BCA method, and the samples were diluted with the Cell Extraction Buffer PTR to a certain concentration. Together with a control sample for creating a calibration curve, 25 μL/well thereof were added to Pre-coated 384 well Microplate SimpleStep ELISA, and the colors were developed by the method described in the manual of p70S6K (pT389) SimpleStep ELISA. Using VARIOSKAN (Thermo Scientific), the absorbances at the major wavelength of 450 nm and a sub-wavelength of 620 nm were measured, and the differences in the absorbances between the wavelengths were determined. A calibration curve was created using the control sample, and the relative concentrations of phosphorylated p70S6K in the samples were calculated based on the differences.
[0076] The results of comparison between eight strains showing the activity and one strain showing no activity are shown in
[Test Example 2] Evaluation of Effect of Suppressing Atrogin-1 and Murf1 Gene Expression
[0077] Mouse myoblasts, C2C12 cells, were seeded on a 48-well culture plate (IWAKI) containing 10% FBS- and 1% penicillin-streptomycin-containing DMEM medium at 1.8×10.sup.4 cell/well. The cells were cultured under the conditions of 37° C. and 5% CO.sub.2 for two days to 80% to 90% confluency.
[0078] Next, the medium was replaced with 2% horse serum-containing 1% penicillin-streptomycin-containing DMEM medium, and the cells were cultured for five days while changing the medium every two to three days to differentiate the C2C12 cells. Then, dexamethasone, which is known to increase the gene expression of Atrogin-1 and MuRF1, was added to the same medium at a concentration of 1 μM, and the lactic acid bacterium homogenates shown in
TABLE-US-00001 TABLE 1 Primer Sequences of Each Genes Atrogin1 F GGCGGACGGCTGGAA SEQ ID NO: 1 R CAGATTCTCCTTACTGTATA SEQ ID NO: 2 CCTCCTTGT MuRF1 F ACGAGAAGAAGAGCGAGCTG SEQ ID NO: 3 R CTTGGCACTTGAGAGGAAGG SEQ ID NO: 4 Gapdh F ACCCAGAAGACTGTGGATGG SEQ ID NO: 5 R TTCAGCTCTGGGATGACCTT SEQ ID NO: 6
[0079] The results of comparison between the strains showing the activity and the strain showing no activity are shown in
[0080] From the above results, it was found that the lactic acid bacteria described in the Test Examples have a muscle synthesis-promoting action or a muscle degradation-suppressing action. In particular, Lactobacillus delbrueckii subsp. lactis, Lactobacillus reuteri and Lactobacillus gasseri subjected to the tests all showed both activities of a muscle synthesis-promoting action and a muscle degradation-suppressing action.
[0081] The invention is not limited to the bacterial strains described in the Examples and is highly likely to be widely applied to the same bacterial species.
INDUSTRIAL APPLICABILITY
[0082] According to the invention, muscle atrophy can be prevented by promoting muscle synthesis or suppressing muscle degradation through intake of a specific lactic acid bacterium, and muscle atrophy can be prevented effectively through intake of a lactic acid bacterium which promotes muscle synthesis and suppresses muscle degradation at the same time. The agent for preventing muscle atrophy of the invention can improve the QOL of not only the elderly but also young people.
Accession Number
[Reference to Deposited Biological Material]
[0083] (1) Strain SBT1371 [0084] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0085] NITE Patent Microorganisms Depositary, National Institute of Technology and Evaluation (2-5-8 Kazusakamatari, Kisarazu-shi, Chiba (postal code 292-0818)) [0086] (ii) Date of Deposit of Biological Material to Depositary of (i) [0087] Sep. 15, 2020 (transferred to international deposit on Sep. 10, 2021) [0088] (iii) Accession Number Given to Deposit by Depositary of (i) [0089] NITE BP-03277 [0090] (2) Strain SBT2002 [0091] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0092] Same as in (1) above. [0093] (ii) Date of Deposit of Biological Material to Depositary of (i) [0094] Sep. 15, 2020 (transferred to international deposit on Sep. 10, 2021) [0095] (iii) Accession Number Given to Deposit by Depositary of (i) [0096] NITE BP-03280 [0097] (3) Strain SBT2080 [0098] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0099] Same as in (1) above. [0100] (ii) Date of Deposit of Biological Material to Depositary of (i) [0101] Sep. 15, 2020 (transferred to international deposit on Sep. 10, 2021) [0102] (iii) Accession Number Given to Deposit by Depositary of (i) [0103] NITE BP-03281 [0104] (4) Strain SBT1393 [0105] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0106] Same as in (1) above. [0107] (ii) Date of Deposit of Biological Material to Depositary of (i) [0108] Sep. 15, 2020 [0109] (iii) Accession Number Given to Deposit by Depositary of (i) [0110] NITE P-03278 [0111] (5) Strain SBT2970 [0112] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0113] Same as in (1) above. [0114] (ii) Date of Deposit of Biological Material to Depositary of (i) [0115] Sep. 15, 2020 (transferred to international deposit on Sep. 10, 2021) [0116] (iii) Accession Number Given to Deposit by Depositary of (i) [0117] NITE BP-03282 [0118] (6) Strain SBT10038 [0119] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0120] Same as in (1) above. [0121] (ii) Date of Deposit of Biological Material to Depositary of (i) [0122] Sep. 15, 2020 [0123] (iii) Accession Number Given to Deposit by Depositary of (i) [0124] NITE P-03283 [0125] (7) Strain SBT1846 [0126] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0127] Same as in (1) above. [0128] (ii) Date of Deposit of Biological Material to Depositary of (i) [0129] Sep. 15, 2020 [0130] (iii) Accession Number Given to Deposit by Depositary of (i) [0131] NITE P-03279 [0132] (8) Strain SBT10043 [0133] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0134] Same as in (1) above. [0135] (ii) Date of Deposit of Biological Material to Depositary of (i) [0136] Mar. 27, 2020 (transferred to international deposit on Mar. 23, 2021) [0137] (iii) Accession Number Given to Deposit by Depositary of (i) [0138] NITE BP-03187 [0139] (9) Strain SBT1848 [0140] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0141] Same as in (1) above. [0142] (ii) Date of Deposit of Biological Material to Depositary of (i) [0143] Nov. 25, 2019 (transferred to international deposit on Sep. 10, 2021) [0144] (iii) Accession Number Given to Deposit by Depositary of (i) [0145] NITE BP-03075 [0146] (10) Strain SBT1021A [0147] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0148] International Patent Organism Depositary, National Institute of Technology and Evaluation (2-5-8 Kazusakamatari, Kisarazu-shi, Chiba (postal code 292-0818)) [0149] (ii) Date of Deposit of Biological Material to Depositary of (i) [0150] Apr. 13, 1989 [0151] (iii) Accession Number Given to Deposit by Depositary of (i) [0152] FERM P-10658 [0153] (11) Strain SBT2299 [0154] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0155] Same as in (1) above. [0156] (ii) Date of Deposit of Biological Material to Depositary of (i) [0157] Jun. 26, 2019 (transferred to international deposit on Jul. 13, 2020) [0158] (iii) Accession Number Given to Deposit by Depositary of (i) [0159] NITE BP-02994 [0160] (12) Strain SBT2397 [0161] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0162] Same as in (1) above. [0163] (ii) Date of Deposit of Biological Material to Depositary of (i) [0164] Nov. 25, 2019 [0165] (iii) Accession Number Given to Deposit by Depositary of (i) [0166] NITE P-03080 [0167] (13) Strain SBT2958 [0168] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0169] Same as in (1) above. [0170] (ii) Date of Deposit of Biological Material to Depositary of (i) [0171] Oct. 31, 2018 [0172] (iii) Accession Number Given to Deposit by Depositary of (i) [0173] NITE P-02803 [0174] (14) Strain SBT1859 [0175] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0176] Same as in (1) above. [0177] (ii) Date of Deposit of Biological Material to Depositary of (i) [0178] Jun. 26, 2019 [0179] (iii) Accession Number Given to Deposit by Depositary of (i) [0180] NITE P-02996 [0181] (15) Strain SBT3331 [0182] (i) Name and Address of Depositary to Which the Biological Material was Deposited [0183] Same as in (1) above. [0184] (ii) Date of Deposit of Biological Material to Depositary of (i) [0185] Jun. 26, 2019 (transferred to international deposit on Jul. 13, 2020) [0186] (iii) Accession Number Given to Deposit by Depositary of (i) [0187] NITE BP-02991