KR20070078107A - Lactic acid bacteria preventing and treating allergic diseases - Google Patents

Abstract

Provided is a novel Lactobacillus plantarum K8 which induces the expression of Th1 cytokine IL-12 and IL-23 and induces the immuno-reaction for inhibiting Th2 cytokine IL-4 and IL-10 so as to prevent and treat allergic diseases such as anaphylaxis, allergic rhinitis, asthma, atopic dermatitis, and urticaria. The Lactobacillus plantarum K8 which is isolated from kimchi and includes Th1 immunoreaction is deposited with a deposition number KCTC10887BP. The food is fermented by using the Lactobacillus plantarum K8. The health functional food comprises the Lactobacillus plantarum K8.

Description

Lactic acid bacteria preventing and treating allergic diseases

1 is a diagram showing a chain polymerization result using a specific primer of the genus Lactobacillus.

Figure 2 shows the effect of the components of Lactobacillus plantarum K8 on the cytokine expression of splenocytes.

IgE-mediated allergic disorders such as anaphylaxis, allergic rhinitis, asthma atopic dermatitis, and urticaria play an important role in mast cells and acidic leukocytes (eosinophil) .

The IgE-producing immune response is very important for signals that differentiate Th0 cells into Th2 cells and cytokines produced from Th2 cells that cause B immune cells to produce IgE. IL-4. Cytokines such as -5, -9, -10 and -13 allow B immune cells to produce IgE as described above and induce Th0 cells to differentiate into Th2 cells.

Attempts have been made to treat allergies by balancing Th1 and Th2 immune responses. The first is a method of producing IgG instead of IgE by inducing an allergen-induced immune response from Th2 to Th1 through hypoxitization, in which allergens are gradually administered from low concentrations. Second, IFN- [gamma], IL-10, IL-12, TGF- [beta], etc., or Th1 stimulating adjuvant are administered to differentiate Th0 cells into Th1 cells.

There is an inverse relationship between infection and allergic disease in the neonatal period (hygiene hypothesis, Strachan, D. P., 1989, Hay fever, hygiene and household size.BMJ 299: 1259-1260). Reduction of infection by pathogenic microorganisms, which are important for neonatal immune system completion, is not known to resolve immune system imbalances. Indeed fetal and neonatal periods are known to be biased towards the Th2 immune response.

Lactobacillus helps to regulate human immune response and maintain intestinal homeostasis, and recently stimulates dendritic cells, a kind of antigen presenting cells, to induce Th1 immune response to prevent allergic diseases and It is known to contribute to treatment (Mohamadzadeh, M. et al., 2005, Lactobacilli activate human dendritic cells that skew T cells toward T helper 1 polarization. PNAS. 102: 2880-2885.). Indeed, there have been reports of atopic dermatitis alleviated through the ingestion of Lactobacillus and Bifidobacterium strains in pregnant women and newborns (Rosenfeldt, V. et al., 2003. Effect of probiotic Lactobacillus strains in children with atopic dermatitis. J. Allergy Clin. Immunol. 111: 389-395).

The health-promoting effects of lactic acid bacteria are strain-specific rather than general features of genus and species (Report of a joint FAO / WHO working group on drafting guidelines for the evaluation of probiotics in food, London Ontario , Canada, 2002). Therefore, the present invention lowers the level of Th2 cytokine and raises the level of Th1 cytokine to balance and prevent IgE-mediated allergic diseases such as atopic dermatitis through the equilibrium of Th1 / Th2 immune responses, Lactobacillus plantarum K8 And to provide a crush.

Still another object of the present invention is to provide a health functional food containing Lactobacillus plantarum K8.

Still another object of the present invention is to provide a food fermented using Lactobacillus plantarum K8.

Kimchi Lactobacillus of Lactobacillus, which forms a polymerization product in a chain polymerization reaction using genus-specific primers, was selected by lowering the pH of the medium from Kimchi collected from various places.

Lactobacillus expressing Th1 cytokine-12 and inhibiting Th1 cytokine-4 were selected from splenocytes of mice with ovalbumin immunity biased by Th2 immune response.

It was confirmed that the components of lactic acid bacteria were isolated to adjust the expression patterns of cytokines as described above to induce Th1 immune response so that lipoteichoic acid, one of the components of lactic acid bacteria, could achieve the cytokine equilibrium.

The morphological and physiological characteristics of the Kimchi Lactobacillus were investigated and named as Lactobacillus plantarum K8. On January 20, 2006, it was deposited with the Korea Institute of Bioscience and Biotechnology (KCTC) to complete the present invention (Accession No. KCTC 10887BP). .

Characteristics of kimchi lactic acid bacteria according to the present invention are as follows.

1. Morphology

When incubated for 2 days at 37 ℃ in MRS agar plate medium,

① Type of bacteria: Bacillus

② Mobility: None

③ Spore Formation Capacity: None

④ Gram staining: positive

2. Physiological Features

① Growth at 15 ℃: +

② Grown at 45 ℃: +

③ Lactic acid production and form: DL-type lactic acid

④ Sugar fermentation test

Amigdalin: +

Arabinos: +

Cellobiose:-

Esculin: ＋

Gluconate:

Mannitol: +

Melegitos: +

Mellibiose: +

Rafinos: +

Ribose: +

Sorbitol: +

Sugar: +

Xylose:-

Based on the morphological, physiological and growth characteristics of such bacteria, the strain of the present invention was named Lactobacillus plantarum K8.

Through the following examples will be described the present invention in more detail.

Example 1

Kimchi Lactobacillus Collection

Agar plates for measurement of flattened debris from kimchi collected from all over the country, diluted with sterile saline solution and added with pH indicator (0.25% yeast extract, 0.5% by weight of proteose peptone No.3, 0.1% by weight of glucose, twin Colonies were cultured in 80% by weight, 0.01% by weight of L-cysteine, 1.5% by weight of agar, and 0.005% of bromocresol purple). The PCR-based method for identification of lactobacillus at the genus level.FEMS Microbiol.Letsts 214 by selecting yellow colonies by lowering the pH of the medium. : 271-275) Kimchi lactic acid bacteria of the genus Lactobacillus forming polymerized products (250 base-pairs) were selected in the chain polymerization reaction using (Table 1) (Fig. 1).

Specific primers of the genus Lactobacillus R16-1 (16S) CTTGTACACACCGCCCGTCA LbLMA1-rev (ITS) CTCAAAACTAAACAAAGTTTC

Example 2

Effect of Kimchi Lactobacillus on Cytokines in Th2-biased Spleen Cells

To investigate the effect of lactic acid bacteria on the expression of Th1 cytokine IL-12 (p70) and Th2 cytokine IL-4, ovalbumin was used (primed) and splenocytes deflected by Th2 immunity were used. O (Al) ₃ adsorbed ovalbumin to BALB / c mice was intraperitoneally injected on day 0 and day 6. On the 13th day, the spleen was removed and separated into single cells. The red blood cells were hemolyzed to obtain splenocytes and suspended in RPMI medium (HyClone) to which 10% FBS and antibiotics were added in a number of 2 × 10 ⁶ cells / ml. 2 × 10 ⁵ cells per well were planted and treated with ovalbumin 1mg / ml and lactic acid bacteria 10 ⁸ cfu / well for 3 days. Culture supernatants were recovered and measured for IL-12, IL-4 by ELISA method.

  Lactobacillus plantarum K8 induced IL-12 most strongly. IL-12 and IL-4 inducing ability of each strain was different from each other, and lactic acid bacteria with high IL-12 inducing ability showed a tendency to inhibit IL-4 expression.

Strains IL-12 IL-4 Strains IL-12 IL-4 pg / ml pg / ml pg / ml pg / ml Lactobacillus K1 3027.4 136.8 K44 3698.2 106.5 K2 2657.3 156.8 K45 2698.1 163.4 K3 3452.3 126.5 K46 2468.2 156.3 K4 1369.4 236.4 K47 1468.7 221.3 K5 2523.6 163.4 K48 934.5 243.0 K6 986.5 226.3 K49 4013.5 93.2 K7 3658.5 116.9 K50 2578.3 156.3 K8 5032.3 43.8 K51 875.4 248.3 K9 2987.4 136.5 K52 965.4 236.9 K10 1539.8 216.5 K53 1236.5 216.3 K11 782.6 246.7 K54 2465.8 163.5 K12 678.2 253.6 K55 1689.4 196.5 K13 1368.5 213.6 K56 968.5 236.8 K14 2361.2 168.7 K57 3578.6 121.5 K15 1786.5 201.3 K58 1352.6 215.6 K16 569.4 263.5 K59 2598.7 163.5 K17 697.8 254.6 K60 1326.8 216.4 K18 2635.5 163.5 K61 4021.3 93.6 K19 1698.7 206.5 K62 2983.4 132.4 K20 3462.3 125.3 K63 3694.5 113.6 K21 2569.3 143.6 K64 3457.8 119.4 K23 1698.2 216.3 K65 2698.4 143.5 K24 697.3 254.6 K66 3126.4 124.6 K25 4593.5 75.6 K67 2569.4 146.9 K26 3421.8 113.2 K68 1249.4 206.4 K27 1536.2 214.5 K69 986.5 239.4 K28 1987.2 191.3 K70 1578.8 203.6 K29 2569.4 145.3 K71 1453.7 211.4 K30 2365.6 165.4 K72 2685.6 143.5 K31 1982.4 187.6 K73 3269.9 126.3 K32 698.4 263.4 K74 1635.8 223.4 K33 879.5 245.6 K75 987.5 239.4 K34 1265.5 213.6 K76 1638.9 210.3 K35 1985.6 236.5 K77 2635.4 156.1 K36 2687.4 145.3 K78 973.6 241.3 K37 2953.4 136.2 K79 876.9 256.3 K38 1326.8 215.6 K80 1368.5 216.3 K39 2789.6 156.3 K81 2698.5 136.4 K40 3658.4 112.4 control 25.6 276.4 K41 1693.4 209.7 Lb. gasseri ATCC33323 3698.7 115.3 K42 963.4 236.1 Lb. acidophilus VPI11088 2987.5 135.4 K43 1527.7 216.2 Lb. casei ATCC12452 3987.6 93.2

Example 3

3-1) Isolation of Lactic Acid Bacteria Components

Bacterial subcellular fractions were used by Roman Dziarski (Methods in enzymology, Academic Press, San Diego, 1994, pp255-260). In summary, Lactobacillus plantarum K8 was incubated at an optimal density (OD) of 620nm to mid logarithmic phase, and the cells were cooled to 4 ° C in an ice ethanol bath. Cells were harvested using a centrifuge (6,000xg, 4 ° C), re-suspensioned with saline and boiled at 100 ° C for 20 minutes. Heat-killed bacterial cells were collected by centrifugation again, washed twice with saline twice with distilled water (DW) and three times with acetone. After drying the heat-killed bacterial cells at 37 ℃ was used as 'heat-killed bacterial cells'.

The dried heat-killed bacterial cells were suspended in ice cold water and ground using 0.1 mm glass beads. Unbroken cells were removed using centrifugation (1,500 × g, 4 ° C., 10 min), and only the broken cells were used as 'crude extract'. The crude extract was precipitated by centrifugation (6,500xg, 4 ° C, 30 minutes) and the precipitate was washed three times with DW. Then ribonuclease (100ug / ml) and deoxyribonuclease (50ug / ml) were added and incubated at 37 ° C for 18 hours. The cell wall was separated by centrifugation at 6,500xg for 30 minutes and lyophilization of the precipitate.

1 g of the cell wall was incubated at 22 ° C. for 18 hours using 5% trichloroacetic acid (TCA) and then precipitated by centrifugation. The precipitate was isolated by 'peptidoglycan' by drying with acetone. On the other hand, supernatant prepared 'teichoic acid (TA)' by removing TCA through TCA extraction with ethyl ether and precipitating with 3 times acetone.

Genomic DNA from Lactobacillus plantarum K8 was isolated using genomic DNA prep kit (Promega). Lipoteichoic acid is also known as Hartung (Schroder, et al., 2003. Lipoteichoic acid (LTA) of Streptococcus pneumoniae and Staphylococcus aureus activates immune cells via Toll-like receptor (TLR) -2, Lipopolysaccharide-binding protein ( LBP), and CD14, whereas TLR4 and MD-2 are not involved.J. Biol. Chem. 278: 15587-15594).

3-2) Effect of Lactic Acid Bacteria on Cytokines

IL-23 has been reported to be more effective than IL-12 in the maintenance of cytotoxic T cells and differentiation into Th1 cells compared with IL-12 (8). Together, the expression levels of the important Th2 cytokine IL-10 were examined. As in Example 2, when the splenocytes were isolated and each component was separated and treated (10 ug / ml), the expression of cytokine was higher than that when treated with live bacteria or treated with heat-killed plantarum (10 ⁸ ). Induced. Among them, pure lipoiccoic acid and teichoic acid were treated with IL-23p19, and DNA and crude extract were higher than IL-23p19 and TNF-a. The expression level of IL-10 was increased (FIG. 2).

Allergic diseases such as atopic dermatitis, asthma, hives, hypersensitivity, and allergic rhinitis are induced by inducing a Th1 immune response when the culture or fermented food, lipoteichoic aicd or lysate containing the same of the present invention is cultured. Can be prevented and treated.

Claims (4)

Lactobacillus plant tarum K8, which induces Th1 immune response isolated from kimchi (KCTC 10887BP) Food fermented using the strain of claim 1 Health functional food containing the strain of claim 1 Food containing a strain lipoteic cocoic acid of claim 1 or a lysate comprising the same

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