JP2017093380A - Novel lactic acid bacterium - Google Patents
Novel lactic acid bacterium Download PDFInfo
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- JP2017093380A JP2017093380A JP2015230538A JP2015230538A JP2017093380A JP 2017093380 A JP2017093380 A JP 2017093380A JP 2015230538 A JP2015230538 A JP 2015230538A JP 2015230538 A JP2015230538 A JP 2015230538A JP 2017093380 A JP2017093380 A JP 2017093380A
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- 241000894006 Bacteria Species 0.000 title claims abstract description 33
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 title abstract description 62
- 235000014655 lactic acid Nutrition 0.000 title abstract description 31
- 239000004310 lactic acid Substances 0.000 title abstract description 31
- 241000194035 Lactococcus lactis Species 0.000 claims abstract description 24
- 235000014897 Streptococcus lactis Nutrition 0.000 claims abstract description 24
- 235000013305 food Nutrition 0.000 claims abstract description 16
- 240000001717 Vaccinium macrocarpon Species 0.000 claims abstract description 8
- 230000002519 immonomodulatory effect Effects 0.000 claims description 6
- 235000021019 cranberries Nutrition 0.000 claims description 4
- 241000194036 Lactococcus Species 0.000 claims description 3
- 235000012545 Vaccinium macrocarpon Nutrition 0.000 abstract description 4
- 235000002118 Vaccinium oxycoccus Nutrition 0.000 abstract description 4
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- 230000004957 immunoregulator effect Effects 0.000 abstract description 4
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- 230000019734 interleukin-12 production Effects 0.000 description 9
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- 229960003130 interferon gamma Drugs 0.000 description 1
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
- A23C9/00—Milk preparations; Milk powder or milk powder preparations
- A23C9/12—Fermented milk preparations; Treatment using microorganisms or enzymes
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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
- A23L31/00—Edible extracts or preparations of fungi; Preparation or treatment thereof
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- 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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- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
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Abstract
Description
本発明は、高い免疫調節作用を有するクランベリー由来の乳酸菌の菌株及びその菌体を含有する飲料、食品に関するものである。特に、ラクトコッカス・ラクティスに関するものである。 The present invention relates to a strain of lactic acid bacteria derived from cranberries having a high immunomodulatory action, and beverages and foods containing the bacterial bodies. In particular, it relates to Lactococcus lactis.
乳酸菌は、ヨーグルトなどの発酵乳製品、各種漬物類など、多くの加工飲食品において、味や風味の付与、栄養の強化、食品の保存性改善など様々な目的で用いられてきた。また、乳酸菌のアレルギー抑制といった有効な生理活性について近年注目が集まっており、精力的に研究が進められている。 Lactic acid bacteria have been used in various processed foods and drinks such as fermented milk products such as yogurt and various pickles for various purposes such as imparting taste and flavor, enhancing nutrition, and improving food storage stability. In recent years, attention has been focused on effective physiological activities such as allergy suppression of lactic acid bacteria, and research is being conducted energetically.
免疫系において重要な役割を担っているTh細胞は、産生するサイトカインによりTh1細胞とTh2細胞に分類される。Th1細胞はインターフェロンγ(以下「IFN-γ」という)など主に細胞性免疫関わるサイトカインを、Th2細胞はインターロイキン4(以下「IL-4」という)など主に液性免疫に関わるサイトカインを産生する。Th2細胞の産生するIL-4は、B細胞からのIgE産生を促進するが、Th1細胞の産生するIFN-γは、IgE産生を抑制する。Th1細胞とTh2細胞はお互いに拮抗し、バランスを保つことにより免疫系の恒常性が維持されているが、Th1細胞が優位に傾くと自己免疫疾患、Th2細胞が優位に傾くとIgE産生が増えてアレルギーが発症される(非特許文献1)。 Th cells that play an important role in the immune system are classified into Th1 cells and Th2 cells according to the cytokines produced. Th1 cells produce cytokines mainly related to cellular immunity such as interferon γ (hereinafter referred to as “IFN-γ”), and Th2 cells mainly produce cytokines related to humoral immunity such as interleukin 4 (hereinafter referred to as “IL-4”). To do. IL-4 produced by Th2 cells promotes IgE production from B cells, whereas IFN-γ produced by Th1 cells suppresses IgE production. Th1 cells and Th2 cells antagonize each other and maintain balance to maintain homeostasis of the immune system, but when Th1 cells predominate, autoimmune disease, and when Th2 cells predominate, IgE production increases Allergy develops (Non-patent Document 1).
したがって、アレルギーを抑制するためには、Th1細胞の数あるいはTh1細胞由来のサイトカイン産生量を増やすことによりTh1細胞とTh2細胞のバランスを正常に戻す必要があり、Th1細胞とTh2細胞の共通の前駆細胞(Th0細胞)をTh1細胞に分化誘導することによりTh1細胞を優位にする働きのある、抗原提示細胞由来のインターロイキン12(以下「IL-12」という)産生を促進する乳酸菌株が求められている。 Therefore, in order to suppress allergies, it is necessary to restore the balance between Th1 cells and Th2 cells by increasing the number of Th1 cells or the production of cytokines derived from Th1 cells, and a common precursor for Th1 and Th2 cells. There is a need for a lactic acid strain that promotes the production of interleukin 12 (hereinafter referred to as “IL-12”) derived from antigen-presenting cells, which has the function of predominating Th1 cells by inducing differentiation of cells (Th0 cells) into Th1 cells. ing.
本発明は、高い免疫調節作用を有するクランベリー由来の乳酸菌及び当該乳酸菌を含有する飲食品を提供することを目的とする。 The object of the present invention is to provide a cranberry-derived lactic acid bacterium having a high immunomodulatory action and a food or drink containing the lactic acid bacterium.
本発明者らは、種々の果実、野菜等を分離源として、乳酸菌について検討を行った結果、クランベリー由来の乳酸菌に高い免疫調節作用を有する株があることを見出し、本発明を完成するに至った。 As a result of studies on lactic acid bacteria using various fruits, vegetables and the like as separation sources, the present inventors have found that cranberry-derived lactic acid bacteria have high immunoregulatory strains and have completed the present invention. It was.
すなわち、本願第一の発明は、クランベリー由来の免疫調節作用を有するラクトコッカス属菌であり、より詳細には、ラクトコッカス・ラクティスT21株(NITE AP-02164)である。 That is, the first invention of the present application is a Lactococcus genus having an immunomodulatory action derived from cranberries, and more specifically, Lactococcus lactis T21 strain (NITE AP-02164).
さらに、本願出願人は、当該乳酸菌を含む飲食品も意図している。すなわち、本願第二の発明は、ラクトコッカス・ラクティスT21株(NITE AP-02164)を含有する飲食品である。 Furthermore, the applicant of the present application also contemplates food and drink products containing the lactic acid bacteria. That is, the second invention of the present application is a food or drink containing Lactococcus lactis T21 strain (NITE AP-02164).
本発明の乳酸菌は、高い免疫調節作用を有する。摂取した場合に免疫機能を賦活化することによりアレルギーを抑制することが可能となる。 The lactic acid bacteria of the present invention have a high immunoregulatory effect. When ingested, allergy can be suppressed by activating immune function.
以下、本発明を詳細に説明する。
1.ラクトコッカス・ラクティスT21株(NITE AP-02164)
本発明の乳酸菌は、ラクトコッカス・ラクティス(lactococcus lactis)である。特にラクトコッカス・ラクティスに属する乳酸菌のうち、ラクトコッカス・ラクティスT21株である。本発明にいうT21の記号は日清食品ホールディングス株式会社で独自に菌株に付与した番号である。本ラクトコッカス・ラクティスT21株はクランベリーより本発明者の一人によって初めて分離されたものである。
Hereinafter, the present invention will be described in detail.
1. Lactococcus lactis T21 strain (NITE AP-02164)
The lactic acid bacterium of the present invention is lactococcus lactis. Among the lactic acid bacteria belonging to Lactococcus lactis, Lactococcus lactis strain T21. The symbol T21 referred to in the present invention is a number uniquely assigned to the strain by Nissin Foods Holdings. This Lactococcus lactis strain T21 was first isolated from cranberries by one of the inventors.
本発明のラクトコッカス・ラクティスT21株は、2015年11月20日に、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NITE AP-02164(受領番号)として寄託されている。本発明のラクトコッカス・ラクティスT21株の菌学的性質は、以下の表1及び2に示す通りである。本菌学的性質は、Bergey’s manual of systematic bacteriology Vol.2(1986)に記載の方法による。 The Lactococcus lactis T21 strain of the present invention was deposited as NITE AP-02164 (reception number) on November 20, 2015 at the National Institute for Product Evaluation Technology Patent Microorganism Depositary. The mycological properties of the Lactococcus lactis T21 strain of the present invention are as shown in Tables 1 and 2 below. This bacteriological property is based on the method described in Bergey ’s manual of systematic bacteriology Vol. 2 (1986).
2.IL-12産生能試験
本発明のラクトコッカス・ラクティスT21株は、後述する実験例に示すように、高い免疫調節作用、すなわちIL-12の高い産生誘導能力を有する。IL-12の産生誘導能力の確認については以下の試験方法によって行った。
2. IL-12 Production Ability Test The Lactococcus lactis T21 strain of the present invention has a high immunomodulating action, that is, a high production induction ability of IL-12, as shown in the experimental examples described later. Confirmation of IL-12 production-inducing ability was performed by the following test method.
<菌体の調製>
菌体を表3に示すMRS培地(Difco Lactobacilli MRS Broth)で30℃ ・48時間培養した。次いで、増殖した菌体を遠心分離して集菌し、分離した菌体を滅菌水にて3回洗浄し、凍結した。その後、凍結乾燥機を用いて凍結乾燥し、乾燥菌体粉末を得た。
<Preparation of bacterial cells>
The cells were cultured in MRS medium (Difco Lactobacilli MRS Broth) shown in Table 3 at 30 ° C. for 48 hours. Next, the grown cells were collected by centrifugation, and the separated cells were washed three times with sterilized water and frozen. Then, it lyophilized | freeze-dried using the freeze dryer and the dry microbial cell powder was obtained.
<IL-12産生誘導評価>
IL-12産生誘導評価では、細胞としてマウス由来マクロファージ様細胞株であるJ774.1細胞を使用した。はじめに、10%の非動化FBS(Invitrogen)とPenicillin-Streptomycin(Invitrogen)、NaHCO3(Sigma)、L- glutamine(Invitrogen)を加えたRPMI1640培地(日水製薬)を用いて、J774.1細胞を37℃ CO2 5%の条件下で培養した。そして、24穴の培養プレートの1穴ごとに2.5×105 cells/mlのJ774.1細胞を2mlずつ加え、そこに上記で得た乾燥菌体粉末をJ774.1細胞培養培地で0.1 mg/mlの濃度になるよう懸濁して100μl添加し37℃ 5%CO2条件下で24時間培養した。培養後培地を回収し3500 rpmで2分間遠心分離を行い、培養上清を得た。Mouse Total IL-12 ELISA kit(Thermo scientific)を用いて培養上清中のIL-12を測定した。
<IL-12 production induction evaluation>
In the evaluation of IL-12 production induction, J774.1 cells, a mouse-derived macrophage-like cell line, were used as cells. First, using 77% RPMI1640 medium (Nissui Pharmaceutical) with 10% immobilized FBS (Invitrogen), Penicillin-Streptomycin (Invitrogen), NaHCO 3 (Sigma), and L-glutamine (Invitrogen), J774.1 cells Was cultured under conditions of 37 ° C. and CO 2 5%. Then, 2 ml each of 2.5 × 10 5 cells / ml J774.1 cells was added to each well of the 24-well culture plate, and the dried cell powder obtained above was added to the 0.1 mg / ml J774.1 cell culture medium. The suspension was suspended to a concentration of ml, 100 μl was added, and the cells were cultured at 37 ° C. under 5% CO 2 for 24 hours. After the culture, the medium was collected and centrifuged at 3500 rpm for 2 minutes to obtain a culture supernatant. IL-12 in the culture supernatant was measured using Mouse Total IL-12 ELISA kit (Thermo scientific).
3.スキムミルク培地での増殖性試験
<スキムミルク培地増殖性試験>
前培養液を10%SM(スキムミルク)培地に植菌し、これを30℃ ・48時間培養し、乳酸菌数、pHによってミルク培地での増殖性を評価した。
3. Proliferation test on skim milk medium <Skim milk medium growth test>
The preculture was inoculated into 10% SM (skimmed milk) medium, which was cultured at 30 ° C. for 48 hours, and the growth on the milk medium was evaluated by the number of lactic acid bacteria and pH.
4.飲食品
本発明の乳酸菌は飲食品に含有せしめて使用することができる。本発明の乳酸菌は特に飲料に好適に用いることができるが、例えば、発酵乳及び乳酸菌飲料が考えられる。現行の乳及び乳製品の成分規格等に関する省令では、成分規格として発酵乳(無脂乳固形分8.0%以上のもの)や乳製品乳酸菌飲料(無脂乳固形分3.0%以上のもの)であれば1.0×107産生誘導能力/ml以上、乳酸菌飲料(無脂乳固形分3.0%未満のもの)であれば1.0×106cfn/ml以上必要とされるが、乳などのはっ酵液中で増殖させたり、最終製品の形態で増殖させたりすることによって上記の菌数を実現することができる。また、発酵乳及び乳酸菌飲料以外にも、バター等の乳製品、マヨネーズ等の卵加工品、バターケーキ等の菓子パン類等にも利用することができる。また、即席麺やクッキー等の加工食品にも好適に利用することができる。上記の他、本発明の食品は、前記乳酸菌と共に、必要に応じて適当な担体及び添加剤を添加して製剤化された形態(例えば、粉末、顆粒、カプセル、錠剤等)であってもよい。
4). Food / Beverage Products The lactic acid bacteria of the present invention can be used by containing them in food / beverage products. Although the lactic acid bacteria of this invention can be used especially suitably for a drink, fermented milk and a lactic acid bacteria drink are considered, for example. According to the current ministerial ordinance regarding milk and dairy product component specifications, the component standard should be fermented milk (non-fat milk solid content of 8.0% or more) or dairy lactic acid bacteria beverage (non-fat milk solid content of 3.0% or more) 1.0 × 10 7 production induction capacity / ml or more, and if it is a lactic acid bacteria beverage (non-fat milk solid content less than 3.0%), 1.0 × 10 6 cfn / ml or more is required. The above-mentioned number of bacteria can be realized by growing or growing in the form of a final product. In addition to fermented milk and lactic acid bacteria beverages, it can also be used for dairy products such as butter, processed egg products such as mayonnaise, and confectionery breads such as butter cake. Moreover, it can utilize suitably also for processed foods, such as instant noodles and a cookie. In addition to the above, the food of the present invention may be in the form of a formulation (for example, powder, granule, capsule, tablet, etc.) by adding an appropriate carrier and additives as necessary together with the lactic acid bacteria. .
本発明の乳酸菌は、一般の飲料や食品以外にも特定保健用食品、栄養補助食品等に含有させることも有用である。 The lactic acid bacteria of the present invention are also useful for inclusion in foods for specified health use, dietary supplements and the like in addition to general beverages and foods.
また、本発明の乳酸菌は、食品以外にも化粧水等の化粧品分野、整腸剤等の医薬品分野、歯磨き粉等の日用品分野、サイレージ、動物用餌、植物液体肥料等の動物飼料・植物肥料分野においても応用可能である。 In addition to food, the lactic acid bacteria of the present invention can also be used in cosmetics such as lotion, pharmaceuticals such as intestinal preparations, daily necessities such as toothpaste, silage, animal feed, and animal feed and plant fertilizers such as plant liquid fertilizer. Applicable.
本発明のクランベリー由来の乳酸菌(ラクトコッカス・ラクティスT21株)は、高い免疫調節作用を有する。摂取した場合に免疫機能を賦活化することによりアレルギーを抑制することが可能となる。 The cranberry-derived lactic acid bacteria (Lactococcus lactis T21 strain) of the present invention have a high immunomodulatory action. When ingested, allergy can be suppressed by activating immune function.
以下、本発明の実施例を示すが、本発明は以下の実施例に限定されるものではない。
<試験例1>IL-12産生誘導評価
本発明のラクトコッカス・ラクティスT21株と、自社保有の3つのラクトコッカス・ラクティス比較菌株(LL1、LL2、LL3)についてIL-12産生誘導評価を実施した。
Examples of the present invention will be described below, but the present invention is not limited to the following examples.
<Test Example 1> IL-12 Production Induction Evaluation IL-12 production induction evaluation was performed on the Lactococcus lactis T21 strain of the present invention and three Lactococcus lactis comparative strains (LL1, LL2, LL3) owned by the company. .
IL-12産生誘導評価は次の手順により行った。本発明の菌株と比較菌株のそれぞれについて、表3に示すMRS培地(Difco Lactobacilli MRS Broth)で30℃ ・48時間培養し、増殖した菌体を遠心分離して集菌し、分離した菌体を滅菌水にて3回洗浄し、凍結した。その後、凍結乾燥機を用いて凍結乾燥し、乾燥菌体粉末を得た。 The evaluation of IL-12 production induction was performed according to the following procedure. For each of the strains of the present invention and the comparative strains, the cells were cultured in MRS medium (Difco Lactobacilli MRS Broth) shown in Table 3 at 30 ° C. for 48 hours, the grown cells were collected by centrifugation, and the separated cells were collected. Washed 3 times with sterilized water and frozen. Then, it lyophilized | freeze-dried using the freeze dryer and the dry microbial cell powder was obtained.
別途、10%の非動化FBS(Invitrogen)とPenicillin-Streptomycin(Invitrogen)、NaHCO3(Sigma)、L- glutamine(Invitrogen)を加えたRPMI1640培地(日水製薬)を用いて、J774.1細胞を37℃ CO2 5%の条件下で培養した。そして、24穴の培養プレートの1穴ごとに2.5×105 cells/mlのJ774.1細胞を2mlずつ加え、そこに上記で得た乾燥菌体粉末をJ774.1細胞培養培地で0.1 mg/mlの濃度になるよう懸濁してそれぞれ100 μl添加し、37℃ 5%CO2条件下で24時間培養した。培養後培地を回収し3500 rpmで2分間遠心分離を行い、培養上清を得た。Mouse Total IL-12 ELISA kit(Thermo scientific)を用いて培養上清中のIL-12を測定した。 Separately, using 77% RPMI1640 medium (Nissui Pharmaceutical) supplemented with 10% immobilized FBS (Invitrogen), Penicillin-Streptomycin (Invitrogen), NaHCO 3 (Sigma), and L-glutmine (Invitrogen), J774.1 cells Was cultured under conditions of 37 ° C. and CO 2 5%. Then, 2 ml each of 2.5 × 10 5 cells / ml J774.1 cells was added to each well of the 24-well culture plate, and the dried cell powder obtained above was added to the 0.1 mg / ml J774.1 cell culture medium. Each suspension was suspended to a concentration of ml, 100 μl was added, and the cells were cultured at 37 ° C. under 5% CO 2 for 24 hours. After the culture, the medium was collected and centrifuged at 3500 rpm for 2 minutes to obtain a culture supernatant. IL-12 in the culture supernatant was measured using Mouse Total IL-12 ELISA kit (Thermo scientific).
その結果を表4及び図1に示す。 The results are shown in Table 4 and FIG.
表4及び図1からも明らかなように、本発明の乳酸菌(ラクトコッカス・ラクティスT21株)のIL-12産生量は6056 pg/mlであり、他の自社保有のラクトコッカス・ラクティスと比べて高いIL-12産生誘導能力を有していることが確認された。 As is clear from Table 4 and FIG. 1, the amount of IL-12 produced by the lactic acid bacterium of the present invention (Lactococcus lactis T21 strain) is 6056 pg / ml, which is compared with other Lactococcus lactis owned by the company. It was confirmed to have a high ability to induce IL-12 production.
<試験例2>スキムミルク培地増殖性試験
本発明のラクトコッカス・ラクティスT21株と、自社保有の3つのラクトコッカス・ラクティス比較菌株(LL1、LL2、LL3)について、スキムミルク培地増殖性試験を実施した。
<Test Example 2> Skim Milk Medium Proliferation Test A skim milk medium proliferation test was performed on the Lactococcus lactis T21 strain of the present invention and three Lactococcus lactis comparative strains (LL1, LL2, LL3) owned by the company.
10%SM(スキムミルク)培地に植菌し、これを30℃ ・48時間培養し、乳酸菌数、pHによってスキムミルク培地での増殖性を評価した。 A 10% SM (skimmed milk) medium was inoculated, and this was cultured at 30 ° C. for 48 hours, and the growth on the skimmed milk medium was evaluated by the number of lactic acid bacteria and pH.
結果を表5及び図2に示す。 The results are shown in Table 5 and FIG.
本発明の菌株(ラクトコッカス・ラクティスT21株)の菌数は7.6×108cfu/mlであり、はっ酵乳、乳酸菌飲料を生産する上で問題のないレベルであった。 The number of strains of the strain of the present invention (Lactococcus lactis T21 strain) was 7.6 × 10 8 cfu / ml, which was a level with no problem in producing fermented milk and lactic acid bacteria beverages.
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