JP4064515B2 - IL-12 production inducing composition - Google Patents
IL-12 production inducing composition Download PDFInfo
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- JP4064515B2 JP4064515B2 JP04876398A JP4876398A JP4064515B2 JP 4064515 B2 JP4064515 B2 JP 4064515B2 JP 04876398 A JP04876398 A JP 04876398A JP 4876398 A JP4876398 A JP 4876398A JP 4064515 B2 JP4064515 B2 JP 4064515B2
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- lactobacillus plantarum
- nigerose
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Description
【0001】
【発明の属する技術分野】
本発明は、ラクトバチルス(Lactobacillus)属に属する菌またはその処理物とたとえば、ニゲロースまたはニゲロオリゴ糖類などの3−O−α−D−グルコピラノシル−D−グルコースを構成単位として含有する糖類を有効成分として含むインターロイキン12(以下、IL−12と略記する。)産生誘導組成物に関する。
【0002】
【従来の技術】
IL−12は、ナチュラルキラー細胞刺激因子、細胞障害性リンパ球成熟因子などとも呼ばれ、B細胞、単球、マクロファージから産生される分子量約70,000の糖蛋白質である。その生物活性としては、静止期のT細胞およびナチュラルキラー(NK)細胞からのインターフェロンγ産生の誘導、NK細胞活性の亢進、リンホカイン活性化キラー(LAK)細胞活性の誘導、静止期T細胞のレクチン刺激による細胞増殖能の充進、ナイーブT細胞からTH−1細胞への分化の促進などが知られており、生体の免疫系に深く関与している物質である。
また、アレルギーや自己免疫疾患の発症機序の1つに、TH−1の活性がTH−2の活性に比して低下した場合が有ると考えられており、ナイーブT細胞からのTH−1細胞への分化促進、TH−1細胞の活性化を促進する作用を有するIL−12は、アレルギーや自己免疫疾患の発症を抑制する効果があると期待されている。
一方、従来から、3−O−α−D−グルコピラノシル−D−グルコースを構成単位として含む糖類がいくつか知られている。例えば、3−O−α−D−グルコピラノシル−D−グルコースを構成単位として含む多糖として、アスペルギルス・ニガー(Aspergillus niger)の菌糸中に含有されるニゲラン、そのニゲランの部分酸加水分解等によって得られるα−D−グルコピラノース(1→3)−α−D−グルコピラノース(1→4)−α−D−グルコピラノース(1→3)−D−グルコース(以下、ニゲランテトラサッカライドと称する)をはじめとする様々な3−O−α−D−グルコピラノシル−D−グルコースを構成単位として含有するオリゴ糖、さらには、上記のニゲランの加水分解によっても得ることが可能であり、また、蜂蜜、麹汁、ビール等にも含有される、ニゲロースと称される3−O−α−D−グルコピラノシル−D−グルコース(図解糖質便覧、70頁)などである。
【0003】
本発明者らは、これら3−O−α−D−グルコピラノシル−D−グルコースを構成単位として含有する糖類が、抗原受容体を介する刺激により活性化されたTリンパ球およびBリンパ球の活性をさらに上昇させ、また、菌体成分またはレクチンを認識する受容体を介する刺激により、抗原非特異的に活性化されたTリンパ球およびBリンパ球の活性をさらに上昇させることを見出し、3−O−α−D−グルコピラノシル−Dグルコースを構成単位として含む糖類を有効成分として含有する免疫賦活剤の発明を完成し、既に特許出願をした(特開平9−52834号)。
その後本発明者らは、乳酸菌の1種であるラクトバチルス・プランタラム(Lactobacillus plantarum)L−137株の菌体がTリンパ球共刺激作用を示すこと、また該菌体が抗原受容体を介する刺激により活性化されたTリンパ球の活性をさらに上昇させ、抗原受容体以外の経路により抗原非特異的に活性化されたTリンパ球の活性をも上昇させることを突き止めた。これらTリンパ球の活性化に伴い、Tリンパ球のインターフェロン−γの産生が増強される一方、Bリンパ球への抗原受容体を介する刺激および抗原受容体以外の経路による活性化は抑制される事実も判明した。これとは別に該菌体がマクロファージのIL−12の産生を選択的に促進する作用を有していることも判明した。
【0004】
すなわち、ラクトバチルス・プランタラムL−137菌体は、抗原受容体を介するTリンパ球の活性化を上昇させることにより、生体内で常時起こっている微生物および腫瘍細胞に対する排除反応を高め、特にインターフェロン−γの産生を増強することから、ウイルスや腫瘍に対する防御能を高める。しかし、単独ではリンパ球はほとんど活性化しないことから、生体にとって好ましくない免疫応答を誘導せず、また、Bリンパ球の抗原受容体を介する活性化や抗原非特異的な活性化を抑制することにより、免疫賦活に伴い予測されるBリンパ球のポリクロナールな活性化により誘導される自己免疫疾患等は増悪させない。
またラクトバチルス・プランタラムL−137菌体は、腫瘍細胞障害性を有するナチュラルキラー細胞を活性化するサイトカインであるIL−12のマクロファージからの産生を高める結果、腫瘍に対する防御能を特に高めるとともに、後天性免疫不全症候群(AIDS)の発症予防にも有用である。しかし腫瘍壊死因子αの産生は軽度にしか上昇させないため、通常のマクロファージの活性化剤により上昇する腫瘍壊死因子αにより引き起こされる、発熱、体重減少などの副作用を誘導しない。
これらの知見を基に、本発明者らは、ラクトバチルス属に属する菌またはその処理物を含む免疫賦活剤の発明を成し遂げ、既に特願平8−289333号として特許出願した。
【0005】
【発明が解決しようとする課題】
前述のとおり、本発明者らはラクトバチルス属に属する菌体にIL−12産生誘導促進効果の存することを見出したが、その効果は該菌単独では必ずしも充分なものではなく、より早く、より強力にその効果を発揮させる手段が他にないものかと鋭意研究を重ねてきた。
【0006】
【課題を解決するための手段】
そして、本発明者らはラクトバチルス属に属する菌体と併用することにより相乗効果を発揮させるような物質がないか種々検討を行ったところ、3−O−α−D−グルコピラノシル−D−グルコースを構成単位とする糖類、特にニゲロースが顕著な相乗効果を示すことを知見し、その知見に基づいて更に研究を重ねて本発明を完成するに至った。すなわち、本発明は、ラクトバチルス・プランタラムL−137株(FERM P−15317)の菌体とニゲロースを有効成分として含むIL−12産生誘導組成物である。
【0007】
【発明の実施の形態】
本発明に用いられる菌は、ラクトバチルス属に属し、B細胞、単球、マクロファージのIL−12の産生を誘導、促進する作用を有するものであればどのような菌でもよい。
菌のマクロファージのIL−12産生促進作用は、たとえばマウス腹腔マクロファージを組織培養プレートで培養し、ラクトバチルス属に属する菌を添加し、一定期間培養して培地中のIL−12濃度をエンザイムイムノアッセイで測定することにより容易に判定することができる。
本発明に用いられるラクトバチルス属に属する菌の代表的なものとしてラクトバチルス・プランタラムL−137を挙げることができるが、この菌は工業技術院生命工学工業技術研究所に平成7年11月30日に受託番号FERM P−15317,微工研 菌寄第15317号として寄託されており、その菌学的性質は特開平9−163977号に詳しく記載されている。さらにこの菌については、Journal of Fermentation and Bioengineering, Vol. 73, No.3, 193-197(1992)及び Vol. 80, No.2, 124-130(1995)にも報告されている。
本発明に用いられるラクトバチルス属に属する菌は、天然培地、合成培地、半合成培地などの培地に培養することにより大量に得ることができる。
【0008】
培地としては、窒素源および炭素源を含有するものが用いられる。窒素源としては、たとえば、肉エキス、ペプトン、グルテン、カゼイン、酵母エキス、アミノ酸等であり、炭素源としては、たとえば、グルコース、キシロース、フラクトース、イノシトール、水アメ、麹汁、澱粉、バカス、フスマ、糖蜜、グリセリン等が用いられる。
このほか、無機質として、たとえば硫酸アンモニウム、リン酸カリウム、塩化マグネシウム、食塩、鉄、マンガン、モリブデン更に各種ビタミン類その他を添加することができる。
培養温度は25〜40℃、好ましくは27〜35℃であり、培養時間は12〜48時間程度であり、通気振盪してもよい。
培地のpHは3〜6、好ましくは4〜6である。培養終了後菌体を採取し蒸留水を加え、遠心分離などの手段により上清を除き、必要によりその操作を繰り返し、遠心分離や濾過等により菌体を採取する。
採取された菌体は生菌のまま、またはたとえば加熱、紫外線照射、ホルマリン処理などにより不活性化して投与に適した剤型にすることもできる。分離された生菌体、死菌体はさらに摩砕や破砕処理をし、得られた処理物を必要により加熱滅菌、無菌濾過し、濾液を凍結乾燥して製品とすることもできる。
菌体の処理物にはたとえば、上記摩砕物、破砕物、それらからの抽出液、凍結乾燥品が含まれる。
また、本発明に用いられる乳酸菌の一種、ラクトバチルス・プランタラム L−137株は、元々発酵食品であるブロングイスダから分離されたものであり、食品、たとえば果菜類、穀類から選択された少なくとも1種または、果菜類や穀類を発酵可能な形態に処理したもの、たとえば切断物、粉砕物、摩砕物、搾汁、搾汁濃縮物を本発明において用いられる菌により発酵させた菌を含む発酵物をそのまま用いることができる。
【0009】
本発明に用いられる他の有効成分は、3−O−α−D−グルコピラノシル−D−グルコースを構成単位として含有する糖類であり、その具体例としては、前記したニゲロース、ニゲランテトラサッカライド、ニゲロトリオースなどのニゲロオリゴ糖が挙げられ、これらは単独または2種以上を併用して用いてもよい。
本発明の組成物における菌体またはその処理物と糖類の使用比率は重量比で1:1〜400、好ましくは1:5〜100である。本発明の組成物は、必要に応じて、さらに種々の添加剤、例えば、医薬の担体、賦形剤、ビタミン、アミノ酸、ミネラル、食物繊維、他の糖類、甘味料、香料、牛乳、脱脂粉乳などの乳成分を加えてもよい。
このようにして得られた本発明の組成物は、免疫力を高めまたは調節する食品や医薬剤としても利用可能である。用いる食品あるいは、食品成分、医薬担体または賦形剤は特に限定するものではなく、当該組成物の具体的用途に応じて当業者が適宜選択できる。また本発明の組成物の形態も特に限定するものではなく、具体的用途に応じて種々の固体や液体の形態とすることができる。本発明の組成物は、医薬として用いる場合、錠剤、粉剤、顆粒剤、カプセル剤、液剤などの経口投与、あるいは注射剤などの非経口投与が考えられるが、経口投与の場合、本発明の菌体またはその処理物を1mg〜5g、好ましくは4mg〜4gおよび本発明の糖類を4mg〜40g、好ましくは10mg〜10g含む製剤を、また注射剤の場合は、菌体またはその処理物を0.1mg〜1g、好ましくは0.5mg〜500mg、糖類を2mg〜20g、好ましくは10mg〜10g含む注射液を、成人1日当たり1〜数回に分けて投与することにより、副作用を伴うことなく所期の目的を達することができる。
本発明の組成物を食品として用いる場合、調味料、畜肉加工品、水産加工品、農産加工品、ステープル、調味食品、調味済食品、デザート類、乳油製品、菓子、スナック菓子等の形態で提供することも可能である。
本発明のIL−12産生誘導組成物は、たとえば、ウイルス、バクテリヤ等の微生物による感染症や各種悪性腫瘍などの予防・治療や免疫力調整に有効である。
【0010】
【実施例】
以下に参考例、実施例および試験例をあげて本発明をさらに具体的に説明するが、本発明はそれらによって限定されるものではない。
参考例1
ラクトバチルス・プランタラムL−137乾燥菌体の製造方法
乳酸菌培養培地であるGYP培地のグルコースの代わりにスターチを加えた培地200mlにラクトバチルス・プランタラムL−137をスターターとして1重量%接種し、32℃で24時間前培養を行った。ついで、6LのGYP培地に前述の培養液をスターターとして1重量%接種し、32℃にて24時間静地培養した。培養後、5000rpmで35分間遠心分離し、上清を除き、菌体を集めた。さらに、集めた菌体ペーストを生理食塩水に良く分散し、5000rpmで35分遠心分離したのち、上清を除き菌体を集めた。これを3回繰り返したのち、蒸留水に分散し、70℃で10分間殺菌した。これを凍結乾燥し、乾燥菌体を7.07g得た。
【0011】
調製法
水を除く上記各成分に純水500gを加えて撹拌し、10分間超音波処理をして懸濁溶解させ、さらに水を加えて全量を1000gにした後、65℃で10分間殺菌して清涼飲料水を得た。
【0012】
調製法
上記各成分の粉末を各配合量均一に混合し、造粒破砕後乾燥して顆粒剤を得た。
【0013】
実施例3
錠剤の処方ならびに調製法
実施例2で得られた顆粒剤99gにステアリン酸カルシウム1gを混合し、打錠機で圧縮整形して900mgの錠剤を得た。得られた錠剤は1錠当たり、ニゲロースを約180mg、ラクトバチルス・プランタラムL−137菌体を約9mg含有する。
実施例4
注射剤の処方ならびに調製法
ニゲロース50g、ラクトバチルス・プランタラムL−137乾燥菌体0.2gを精製水1000mlに懸濁させ、超音波処理した後、凍結乾燥した。この凍結乾燥物を500本のバイアル瓶に分注して注射剤を得た。この注射剤1バイアルには凍結乾燥物100.4mgが含まれており、2mlの生理食塩水に容易に懸濁溶解した。
【0014】
調製法
上記各成分の配合量を均一に混合し、ゼラチンカプセルに充填した。カプセル1個当たり、ニゲロースを250mg、ラクトバチルス・プランタラムL−137菌体を30mg含有する。
【0015】
試験例1
マウス腹腔マクロファージのIL−12産生誘導に対するラクトバチルス・プランタラムL−137乾燥死菌体とニゲロースの相乗効果
マウス(C57BL/6、雌、16週齢)の腹腔内に無菌的にRPMI 1640培地を注入し、腹部をよく揉んだ後、注入したRPMI 1640培地を回収し腹腔細胞浮遊液を得た。腹腔細胞浮遊液の細胞数とそれに含まれるマクロファージの割合を自動血球計測装置で測定した後、マクロファージとして1×106/mlの細胞数にRPMI 1640培地で調製し、96穴組織培養プレートに1穴当たり100μlを播種した。37℃の5%炭酸ガス培養器内に2時間放置し、腹腔マクロファージを各穴に付着させ、2時間後にRPMI 1640培地で洗浄後、RPMI 1640培地を1穴当たり100μl加えた。
これにRPMI 1640培地(対照)あるいはラクトバチルス・プランタラムL−137乾燥死菌体を0.4あるいは4μg/mlの濃度でRPMI 1640培地に溶解した液をそれぞれ1穴当たり50μl加えた。さらに、RPMI1640培地(対照)あるいはニゲロースを128、640あるいは3200μg/mlの濃度でRPMI 1640培地に溶解した液を1穴当たり50μl加え、37℃の5%炭酸ガス培養器内で15時間培養し、培養後の培養上清のIL−12をエンザイムイムノアッセイで測定した。
【0016】
エンザイムイムノアッセイは、ラット抗マウスIL−12 IgG2a 抗体(Genzyme 社製)をホウ酸緩衝液で6μg/mlに調製した溶液を、96穴組織培養プレート1穴当たり100μl加え37℃で1日間放置しラット抗マウスIL−12 IgG2a 抗体を各穴に付着させたプレートを用いて行った。培養上清を1穴当たり50μl加え室温で90分間放置し、培養上清のIL−12をプレートに付着したラット抗マウスIL−12 IgG2a 抗体と結合させた。洗浄後ラット抗マウスIL−12 IgG2a 抗体(Genzyme 社製)を加え、プレートに結合させたIL−12に結合させた。洗浄後ペルオキシダーゼで標識した抗ラットIgG1抗体を加え、プレートに結合させたラット抗マウスIL−12 IgG1 抗体に結合させた。洗浄後、過酸化水素0.006%とオルトフェニレンジアミン0.1%を含有するリン酸緩衝液を1穴当たり100μl加え、室温で20分間反応させ、反応を1.5N硫酸で停止し、マイクロプレートリーダーで吸光度492nmを測定し、リコンビナントマウスIL−12で作成した標準曲線から、培養上清中のIL−12の濃度を求めた。〔表1〕にその結果を示す。
【0017】
【表1】
〔表1〕から明らかなごとくラクトバチルス・プランタラムL−137乾燥死菌体は単独でもマクロファージからのIL−12の産生を誘導したが、ニゲロース単独ではその作用はなかった。しかし、ラクトバチルス・プランタラムL−137乾燥死菌体にニゲロースを添加すると、IL−12の産生がラクトバチルス・プランタラムL−137乾燥死菌体単独にくらべ大幅に上昇し、IL−12産生誘導におけるラクトバチルス・プランタラムL−137乾燥死菌体とニゲロースの相乗効果が検証された。
【0018】
試験例2
血中IL−12の上昇に対するラクトバチルス・プランタラムL−137乾燥死菌体とニゲロースの相乗効果
21週齢、雌性のDBA/2マウス(1群5匹)に連続して4日間毎日、(1)生理食塩水0.45ml、(2)ニゲロースを100mg/mlの濃度に生理食塩水で調製した溶液0.3ml、(3)ラクトバチルス・プランタラムL−137乾燥死菌体を1mg/mlの濃度に生理食塩水で調製した溶液0.15ml、および(4)ニゲロースを100mg/mlの濃度に生理食塩水で調製した溶液0.3mlとラクトバチルス・プランタラムL−137乾燥死菌体を1mg/mlの濃度に生理食塩水で調製した溶液0.15mlをそれぞ腹腔内投与した。4日目の投与の4時間後にマウスの眼底静脈から採血し、血漿を分離し、IL−12をエンザイムイムノアッセイで測定した。結果を〔表2〕に示す。
【0019】
【表2】
〔表2〕から明らかなごとく、ニゲロース単独使用では有意な血漿IL−12の上昇は認められなかったが、ラクトバチルス・プランタラムL−137乾燥死菌体単独使用では有意な血漿IL−12の上昇がみられ、ラクトバチルス・プランタラムL−137乾燥死菌体とニゲロースを併用すると、血漿IL−12が顕著に上昇し、血中IL−12上昇におけるラクトバチルス・プランタラムL−137乾燥死菌体とニゲロースの相乗効果が検証された。
【0020】
【発明の効果】
本発明においては、単独投与では有意なIL−12産生誘導活性を示さない3−O−α−D−グルコピラノシル−D−グルコースを構成単位として含有する糖類を、ラクトバチルス属に属する菌体またはその処理物と併用して投与することにより、IL−12産生誘導活性に対する顕著な相乗効果が奏される。[0001]
BACKGROUND OF THE INVENTION
The present invention comprises a bacterium containing Lactobacillus genus or a processed product thereof and a saccharide containing 3-O-α-D-glucopyranosyl-D-glucose as a structural unit, such as nigerose or nigerooligosaccharide, as an active ingredient. The present invention relates to a composition for inducing interleukin 12 production (hereinafter abbreviated as IL-12).
[0002]
[Prior art]
IL-12 is also called natural killer cell stimulating factor, cytotoxic lymphocyte maturation factor, and the like, and is a glycoprotein having a molecular weight of about 70,000 produced from B cells, monocytes, and macrophages. As the biological activity, induction of interferon γ production from T cells and natural killer (NK) cells in the stationary phase, enhanced NK cell activity, induction of lymphokine-activated killer (LAK) cell activity, quiescent T cells Enhancement of cell proliferation ability by lectin stimulation, promotion of differentiation from naive T cells to T H -1 cells, etc. are known and are deeply involved in the immune system of the living body.
In addition, it is considered that one of the pathogenesis of allergies and autoimmune diseases is that the activity of T H -1 is decreased compared to the activity of T H -2, and T IL-12, which has an action of promoting differentiation into H- 1 cells and promoting activation of TH- 1 cells, is expected to have an effect of suppressing the development of allergies and autoimmune diseases.
On the other hand, some saccharides containing 3-O-α-D-glucopyranosyl-D-glucose as a constituent unit are conventionally known. For example, as a polysaccharide containing 3-O-α-D-glucopyranosyl-D-glucose as a structural unit, it is obtained by nigeran contained in the mycelium of Aspergillus niger, partial acid hydrolysis of the nigeran, etc. α-D-glucopyranose (1 → 3) -α-D-glucopyranose (1 → 4) -α-D-glucopyranose (1 → 3) -D-glucose (hereinafter referred to as “nigeran tetrasaccharide”) Various oligosaccharides containing various 3-O-α-D-glucopyranosyl-D-glucose as a constituent unit, and further, can be obtained by hydrolysis of the above-mentioned nigeran. 3-O-α-D-glucopyranosyl-D-glucose called nigerose contained in juice, beer, etc. Glycolytic handbook, page 70).
[0003]
The inventors of the present invention have demonstrated that the saccharide containing 3-O-α-D-glucopyranosyl-D-glucose as a constituent unit exhibits the activity of T lymphocytes and B lymphocytes activated by stimulation via an antigen receptor. Further, it has been found that stimulation of a cell component or a receptor that recognizes a lectin further increases the activity of antigen-non-specifically activated T lymphocytes and B lymphocytes. The invention of an immunostimulant containing a saccharide containing -α-D-glucopyranosyl-D glucose as a structural unit as an active ingredient has been completed, and a patent application has already been filed (Japanese Patent Laid-Open No. 9-52834).
Thereafter, the inventors of the present invention show that the bacterial body of Lactobacillus plantarum L-137 strain, which is a kind of lactic acid bacteria, exhibits T lymphocyte costimulatory action, and that the bacterial body mediates an antigen receptor. It was found that the activity of T lymphocytes activated by stimulation was further increased, and the activity of T lymphocytes activated nonspecifically by a pathway other than the antigen receptor was also increased. With the activation of these T lymphocytes, the production of interferon-γ by T lymphocytes is enhanced, while the stimulation by B via the antigen receptor and the activation by pathways other than the antigen receptor are suppressed. The fact was also found. Apart from this, it was also found that the cells have an action of selectively promoting the production of IL-12 by macrophages.
[0004]
In other words, Lactobacillus plantarum L-137 cells increase the activation of T lymphocytes via antigen receptors, thereby enhancing the elimination reaction against microorganisms and tumor cells that are constantly occurring in the living body. -Enhance production against viruses and tumors by enhancing γ production. However, since lymphocytes are hardly activated by themselves, they do not induce an immune response unfavorable to the living body, and also suppress activation of B lymphocytes through antigen receptors and non-specific activation of antigens. Thus, autoimmune diseases induced by polyclonal activation of B lymphocytes predicted with immune activation are not exacerbated.
In addition, Lactobacillus plantarum L-137 cells increase the production of IL-12, which is a cytokine that activates natural killer cells having tumor cytotoxicity, from macrophages, and as a result, particularly enhance the protective ability against tumors. It is also useful for preventing the development of acquired immune deficiency syndrome (AIDS). However, since the production of tumor necrosis factor α is only slightly increased, it does not induce side effects such as fever and weight loss caused by tumor necrosis factor α that is increased by normal macrophage activators.
Based on these findings, the present inventors have accomplished the invention of an immunostimulant containing a bacterium belonging to the genus Lactobacillus or a processed product thereof, and have already filed a patent application as Japanese Patent Application No. 8-289333.
[0005]
[Problems to be solved by the invention]
As described above, the present inventors have found that cells belonging to the genus Lactobacillus have an IL-12 production induction promoting effect. However, the effect is not always sufficient by itself, and more quickly, more We have been eagerly researching whether there is any other means to exert its effect strongly.
[0006]
[Means for Solving the Problems]
And when the present inventors variously examined whether there exists a substance which exhibits a synergistic effect by using together with the microbial cell which belongs to the Lactobacillus genus, 3-O- (alpha) -D-glucopyranosyl-D-glucose was examined. As a structural unit, saccharides, especially nigerose, have been found to show a remarkable synergistic effect, and further studies have been made based on the findings to complete the present invention. That is, the present invention is a Lactobacillus plantarum L-137 strain IL-12 production inducing composition comprising the bacterial cells and nigerose of (FERM P-15317) as an active ingredient.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The bacterium used in the present invention may be any bacterium that belongs to the genus Lactobacillus and has an action of inducing and promoting IL-12 production of B cells, monocytes, and macrophages.
The IL-12 production-promoting action of macrophages of fungi can be determined by, for example, culturing mouse peritoneal macrophages on a tissue culture plate, adding bacteria belonging to the genus Lactobacillus, culturing them for a certain period, and determining the concentration of IL-12 in the medium by enzyme immunoassay. It can be easily determined by measuring.
Lactobacillus plantarum L-137 may be mentioned as a representative of the bacteria belonging to the genus Lactobacillus used in the present invention. It has been deposited on the 30th under the accession number FERM P-15317, Microtechnical Laboratories No. 15317, and its bacteriological properties are described in detail in JP-A-9-163977. Furthermore, this bacterium has also been reported in Journal of Fermentation and Bioengineering, Vol. 73, No. 3, 193-197 (1992) and Vol. 80, No. 2, 124-130 (1995).
Bacteria belonging to the genus Lactobacillus used in the present invention can be obtained in large quantities by culturing them in a medium such as a natural medium, a synthetic medium, or a semi-synthetic medium.
[0008]
A medium containing a nitrogen source and a carbon source is used as the medium. Examples of the nitrogen source include meat extract, peptone, gluten, casein, yeast extract, amino acid, and the like. Examples of the carbon source include glucose, xylose, fructose, inositol, water candy, broth, starch, bacus, bran Molasses, glycerin and the like are used.
In addition, for example, ammonium sulfate, potassium phosphate, magnesium chloride, sodium chloride, iron, manganese, molybdenum, and various vitamins can be added as inorganic substances.
The culture temperature is 25 to 40 ° C., preferably 27 to 35 ° C., the culture time is about 12 to 48 hours, and aeration shaking may be performed.
The pH of the medium is 3-6, preferably 4-6. After completion of the culture, the cells are collected, distilled water is added, the supernatant is removed by means such as centrifugation, the operation is repeated as necessary, and the cells are collected by centrifugation or filtration.
The collected microbial cells can be made into live dosage forms or inactivated by, for example, heating , ultraviolet irradiation, formalin treatment, or the like to form a dosage form suitable for administration. The separated live cells and dead cells can be further ground or crushed, and the obtained processed product can be heat-sterilized and aseptically filtered if necessary, and the filtrate can be freeze-dried to obtain a product.
Examples of the processed product of the microbial cell include the above-mentioned ground product, crushed product, extract from them, and lyophilized product.
In addition, Lactobacillus plantarum L-137 strain, a kind of lactic acid bacteria used in the present invention, was originally isolated from Bron Isda, which is a fermented food, and is at least one selected from foods such as fruit vegetables and cereals. Alternatively, a fermented product containing bacteria obtained by fermenting fruit vegetables and cereals into a form that can be fermented, such as a cut product, a pulverized product, a milled product, a squeezed juice, and a squeezed concentrate by the bacterium used in the present invention. It can be used as it is.
[0009]
Another active ingredient used in the present invention is a saccharide containing 3-O-α-D-glucopyranosyl-D-glucose as a structural unit. Specific examples thereof include the above-described nigerose, nigeran tetrasaccharide, and nigero. Examples include nigerooligosaccharides such as triose, and these may be used alone or in combination of two or more.
The use ratio of the microbial cells or the processed product thereof and the saccharide in the composition of the present invention is 1: 1 to 400, preferably 1: 5 to 100 by weight. The composition of the present invention may further comprise various additives as necessary, for example, pharmaceutical carriers, excipients, vitamins, amino acids, minerals, dietary fiber, other sugars, sweeteners, flavors, milk, skim milk powder. Milk components such as may be added.
The composition of the present invention thus obtained can also be used as a food or pharmaceutical agent that enhances or regulates immunity. The food to be used, the food ingredient, the pharmaceutical carrier or the excipient is not particularly limited, and can be appropriately selected by those skilled in the art depending on the specific use of the composition. Further, the form of the composition of the present invention is not particularly limited, and various solid and liquid forms can be used according to specific applications. When the composition of the present invention is used as a medicament, oral administration of tablets, powders, granules, capsules, liquids, etc., or parenteral administration such as injections can be considered. A preparation containing 1 mg to 5 g, preferably 4 mg to 4 g of the body or a processed product thereof and 4 mg to 40 g, preferably 10 mg to 10 g of the saccharide of the present invention. By administering an injection solution containing 1 mg to 1 g, preferably 0.5 mg to 500 mg, and saccharides 2 mg to 20 g, preferably 10 mg to 10 g in 1 to several times per day for an adult, it is expected without any side effects. Can reach the goal.
When the composition of the present invention is used as a food, it is provided in the form of seasonings, processed meat products, processed fishery products, processed agricultural products, staples, seasoned foods, seasoned foods, desserts, milk oil products, confectionery, snack confectionery, etc. It is also possible.
The IL-12 production-inducing composition of the present invention is effective for the prevention / treatment and immunity adjustment of infectious diseases and various malignant tumors caused by microorganisms such as viruses and bacteria.
[0010]
【Example】
Hereinafter, the present invention will be described more specifically with reference to reference examples, examples and test examples, but the present invention is not limited thereto.
Reference example 1
Method for producing Lactobacillus plantarum L-137 dry cells Inoculate 1% by weight of Lactobacillus plantarum L-137 as a starter in 200 ml of a medium in which starch is added instead of glucose in the GYP medium which is a lactic acid bacteria culture medium. Pre-culture was performed at 32 ° C. for 24 hours. Next, 6% of GYP medium was inoculated with 1% by weight of the above culture medium as a starter, and cultured at 32 ° C. for 24 hours. After incubation, the mixture was centrifuged at 5000 rpm for 35 minutes, the supernatant was removed, and the cells were collected. Further, the collected cell paste was well dispersed in physiological saline and centrifuged at 5000 rpm for 35 minutes, and then the supernatant was removed to collect the cells. This was repeated three times, then dispersed in distilled water and sterilized at 70 ° C. for 10 minutes. This was freeze-dried to obtain 7.07 g of dried cells.
[0011]
Preparation method 500 g of pure water is added to each of the above components except water, and the mixture is sonicated for 10 minutes to be suspended and dissolved. Further, water is added to bring the total amount to 1000 g, and then sterilized at 65 ° C. for 10 minutes. To get a soft drink.
[0012]
Preparation Method The powders of the above components were mixed uniformly in the respective blending amounts, granulated and crushed and dried to obtain granules.
[0013]
Example 3
Tablet formulation and preparation method 1 g of calcium stearate was mixed with 99 g of the granule obtained in Example 2 and compression-molded with a tableting machine to obtain a 900 mg tablet. The obtained tablet contains about 180 mg of nigerose and about 9 mg of Lactobacillus plantarum L-137 cells per tablet.
Example 4
Formulation and Preparation of Injections Nigerose 50 g and Lactobacillus plantarum L-137 dry cells 0.2 g were suspended in 1000 ml of purified water, sonicated and then lyophilized. This lyophilized product was dispensed into 500 vials to obtain an injection. One vial of this injection contained 100.4 mg of lyophilized product and was easily suspended and dissolved in 2 ml of physiological saline.
[0014]
Preparation method The above components were mixed uniformly and filled into gelatin capsules. Each capsule contains 250 mg of nigerose and 30 mg of Lactobacillus plantarum L-137.
[0015]
Test example 1
Synergistic effect of Lactobacillus plantarum L-137 dry dead cells and nigerose on IL-12 production induction of mouse peritoneal macrophages RPMI 1640 medium was aseptically injected into the peritoneal cavity of mice (C57BL / 6, female, 16 weeks old). After the injection and the abdomen were thoroughly massaged, the injected RPMI 1640 medium was recovered to obtain a peritoneal cell suspension. The number of cells in the peritoneal cell suspension and the ratio of macrophages contained therein were measured with an automatic hemocytometer, and then prepared as macrophages in 1 × 10 6 / ml cells in RPMI 1640 medium. 100 μl was seeded per well. The peritoneal macrophages were allowed to adhere to each well for 2 hours in a 37 ° C. 5% carbon dioxide incubator, and after 2 hours, washed with RPMI 1640 medium, 100 μl of RPMI 1640 medium was added per well.
RPMI 1640 medium (control) or a solution of Lactobacillus plantarum L-137 dried dead cells dissolved in RPMI 1640 medium at a concentration of 0.4 or 4 μg / ml was added to each 50 μl per well. Further, 50 μl of RPMI 1640 medium (control) or nigerose dissolved in RPMI 1640 medium at a concentration of 128, 640 or 3200 μg / ml was added per well and cultured in a 5% carbon dioxide incubator at 37 ° C. for 15 hours. IL-12 of the culture supernatant after the culture was measured by enzyme immunoassay.
[0016]
In the enzyme immunoassay, a rat anti-mouse IL-12 IgG2a antibody (Genzyme) prepared at 6 μg / ml with borate buffer was added at 100 μl per well of a 96-well tissue culture plate and left at 37 ° C. for 1 day. Anti-mouse IL-12 IgG2a antibody was used in a plate attached to each hole. The culture supernatant was added in an amount of 50 μl per well and allowed to stand at room temperature for 90 minutes, and the culture supernatant IL-12 was bound to the rat anti-mouse IL-12 IgG2a antibody attached to the plate. After washing, rat anti-mouse IL-12 IgG2a antibody (Genzyme) was added and allowed to bind to IL-12 bound to the plate. After washing, an anti-rat IgG1 antibody labeled with peroxidase was added and allowed to bind to the rat anti-mouse IL-12 IgG1 antibody bound to the plate. After washing, 100 μl of phosphate buffer containing 0.006% hydrogen peroxide and 0.1% orthophenylenediamine was added per well, reacted at room temperature for 20 minutes, and the reaction was stopped with 1.5N sulfuric acid. Absorbance of 492 nm was measured with a plate reader, and the concentration of IL-12 in the culture supernatant was determined from a standard curve prepared with recombinant mouse IL-12. The results are shown in [Table 1].
[0017]
[Table 1]
As is clear from [Table 1], Lactobacillus plantarum L-137 dried dead cells alone induced IL-12 production from macrophages, but nigerose alone had no effect. However, when nigerose is added to Lactobacillus plantarum L-137 dried dead cells, the production of IL-12 is significantly increased compared to Lactobacillus plantarum L-137 dried dead cells alone, and IL-12 production The synergistic effect of Lactobacillus plantarum L-137 dried dead cells and nigerose in induction was verified.
[0018]
Test example 2
Synergistic effect of Lactobacillus plantarum L-137 dry dead cells and nigerose on elevation of blood IL-12 21 weeks old, female DBA / 2 mice (5 mice per group) for 4 consecutive days ( 1) 0.45 ml of physiological saline, (2) 0.3 ml of a solution of nigerose prepared in physiological saline to a concentration of 100 mg / ml, (3) 1 mg / ml of dried dead cells of Lactobacillus plantarum L-137 0.15 ml of a solution prepared with physiological saline at a concentration of 0.14 ml, and (4) 0.3 ml of a solution prepared with physiological saline at a concentration of 100 mg / ml nigerose and dried dead cells of Lactobacillus plantarum L-137 0.15 ml of a solution prepared with physiological saline to a concentration of 1 mg / ml was intraperitoneally administered. Four hours after administration on the fourth day, blood was collected from the fundus vein of the mouse, plasma was separated, and IL-12 was measured by enzyme immunoassay. The results are shown in [Table 2].
[0019]
[Table 2]
As is clear from Table 2, no significant increase in plasma IL-12 was observed when nigerose alone was used, but there was a significant increase in plasma IL-12 when Lactobacillus plantarum L-137 was used alone. When Lactobacillus plantarum L-137 dried dead cells and nigerose were used in combination, plasma IL-12 was significantly elevated, and Lactobacillus plantarum L-137 dried death in the increase in blood IL-12 The synergistic effect of the bacterial cells and nigerose was verified.
[0020]
【The invention's effect】
In the present invention, a saccharide containing 3-O-α-D-glucopyranosyl-D-glucose as a constituent unit, which does not show significant IL-12 production-inducing activity when administered alone, is a microbial cell belonging to the genus Lactobacillus or its When administered in combination with the treated product, a remarkable synergistic effect on IL-12 production-inducing activity is exhibited.
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JP2005247775A (en) * | 2004-03-05 | 2005-09-15 | Sankyo Seiyaku Kogyo Kk | Nutrient composition for prevention and treatment |
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