JP2016028595A - 腸内腐敗物質の低減作用を有するビフィズス菌 - Google Patents
腸内腐敗物質の低減作用を有するビフィズス菌 Download PDFInfo
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- JP2016028595A JP2016028595A JP2015197460A JP2015197460A JP2016028595A JP 2016028595 A JP2016028595 A JP 2016028595A JP 2015197460 A JP2015197460 A JP 2015197460A JP 2015197460 A JP2015197460 A JP 2015197460A JP 2016028595 A JP2016028595 A JP 2016028595A
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- microorganisms
- intestinal
- concentration
- breve
- bifidobacteria
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Abstract
Description
ヒトの生体内(腸内)で生成される腐敗物質は発ガンや老化を促進することが知られており、生体内の腐敗物質を積極的に低減できれば、ヒトの健康に寄与できると考えられる。主として大腸内で生成される腐敗物質として、フェノール、p-クレゾール、インドール、スカトール、アンモニアなどを列挙できる。これらの腐敗物質のうち特に、インドールやスカトールなどが悪臭成分であり、また、健康に悪影響を及ぼす可能性のある成分であることから、インドールやスカトールの低減が望まれている。
2−1.腸内腐敗物質を低減させる微生物の in vitro でのスクリーニング又は予備的なスクリーニング
微生物を使用して、腸内腐敗物質(腸内で生成され、悪臭成分などを発生する物質)を腸内環境で低減させるためには、その特定の微生物が腸内で優先的に存在することが重要である。つまり、そのような微生物が備えるべき性質として、腸内環境に適応した条件への耐性が必要となる。
当初には、動物実験を実施してin vivoにより、血清中のインドキシル硫酸の低減効果を十分に確認できなかった。血清中のインドキシル硫酸の低減効果は、腸内で発揮されることが期待されるが、生体内に微生物(菌体)が投与されても、腸内に到達する前に、その大部分が死滅している可能性や、腸内に到達した後に、それが安定して維持(保持)されていない可能性が考えられた。そこで、本願発明では、生体内に微生物が投与された後に、その生残性や安定性などの向上に寄与することを期待して、フラクトオリゴ糖(FOS)を食餌へ添加してみたところ、血清中のインドキシル硫酸の低減効果を確認できた。
本願発明者は、腸内腐敗物質を低減させる微生物として、腐敗物質を効果的に低減できる微生物(菌株)を選抜する目的から、一般的にヒトの生体内(腸内)で優勢とされる乳酸菌やビフィズス菌、特にビフィズス菌を対象として検討した。そして、ビフィズス菌として、B. breveの32菌株、B. longumの92菌株、B. adolescentisの72菌株の合計で196菌株について、スクリーニングを実施して、in vitroで評価した。その結果として、B. breveの6菌株と、B. longumの3菌株の合計で9菌株を選抜した。
4−1.腸内腐敗物質を低減させる微生物を含有する食品
本願発明の腸内腐敗物質を低減させる微生物(乳酸菌やビフィズス菌など、好ましくは、B. breve OLB6129)は、食品に添加することができる。つまり、本願発明の食品として、腸内腐敗物質を低減させる微生物を添加した任意の食品を挙げることができ、好適には、腸内腐敗物質を低減させる微生物を添加した発酵乳製品又は発酵乳飲料を挙げることができ、さらに好適には、腸内腐敗物質を低減させる微生物(B. breve OLB6129)、並びにフラクトオリゴ糖(FOS)及び/又はガラクトオリゴ糖(GOS)を添加した発酵乳製品又は発酵乳飲料を挙げることができる。なおGOSは、FOSと同様に利用できることが知られている(http://www.nyusankin.or.jp/scientific/hosono_3.html)。また、フラクトオリゴ糖(FOS)及び/又はガラクトオリゴ糖(GOS)の添加量は、総量の濃度として、0.5〜20(w/v)%、好適には、0.5〜15(w/v)%、より好適には、0.5〜10(w/v)%に設定することができる。
本願発明の腸内腐敗物質を低減させる微生物(乳酸菌やビフィズス菌など、好ましくは、B. breve OLB6129)を含む医薬品は、腸内腐敗物質の低減剤、又は腎臓透析患者用の透析合併症の予防剤又は改善剤として適用することができる。さらに、本願発明の医薬品は、お腹の張りの改善剤としても適用することができる。
まず、反応溶液の組成では、ビフィズス菌が殆ど増殖せず、インドール(腸内腐敗物質の指標)の低減効果を発揮し、その効果を明確に評価できるように、反応溶液の組成を決定した。
B. breveの34菌株、B. longumの93菌株、B. adolescentisの72菌株の合計で199菌株について、静置培養したところ、B. breveの2菌株、B. longumの1菌株で生育が極端に遅かった。そこで、これら3菌株を実験の対象外とし、最終的には、B. breveの32菌株、B. longumの92菌株、B. adolescentisの72菌株の合計で196菌株について、スクリーニング(評価・選抜)した。
上記の実施例1で選抜した9菌株を動物実験(in vivo試験)により、スクリーニング(評価・選抜)した。
[実験手順]
Balb/cマウス(SLC, ♀, 6-week-old)を一週間で馴化した後に、表4のように、体重に基づいて 4群に分け、それぞれの群について、生理食塩水と生理食塩水の B. breve OLB6129(生菌)の懸濁液を、2週間で連続して午前中に経口投与した。馴化期間には全群に飼料(粉末CRF-1/FOS(和光純薬工業(株)):10(w/v)%、L-Tryptophan:2.5(w/v)%)を自由摂取させた。
B. breve OLB6129の投与期間の終了時に、血清中インドキシル硫酸の濃度を確認したところ、インドキシル硫酸の濃度の低減効果について、2 x 108 cfu/body/dayの投与群(III)と、2 x 109 cfu/body/dayの投与群(IV)では、生理食塩水の投与群(コントロール)(I)と比べて有意差があったが、2 x 107 cfu/body/dayの投与群(II)cfu/bodyでは、生理食塩水の投与群(コントロール)(I)と比べて有意差はなかった(図3)。
[実験手順]
Balb/cマウス(SLC, ♀, 6-week-old)を一週間で馴化した後に、表5のように、体重に基づいて 4群に分け、それぞれの群について、FOSを無添加の生理食塩水と生理食塩水の B. breve OLB6129(生菌)の懸濁液、FOSを添加した生理食塩水と生理食塩水の B. breve OLB6129(生菌)の懸濁液を、2週間で連続して午前中に経口投与した。馴化期間には全群に飼料(粉末CRF-1/L-Tryptophan:2.5(w/v)%)を自由摂取させた。なお、B. breve OLB6129(生菌)の濃度は、実施例3において、腐敗物質の低減効果に関して必要性が示された最低限の用量である、2 x 108 cfu/body/day に設定した。
FOSの投与期間の終了時に、血清中インドキシル硫酸の濃度を確認したところ、B. breve OLB6129のみの投与群では、インドキシル硫酸の濃度の低減効果は小さかった(図5)。また、インドキシル硫酸の濃度の低減効果について、FOSのみの投与群では、生理食塩水の投与群(I)と比べて有意差はなかった(図5)。一方、インドキシル硫酸の濃度の低減効果について、B. breve OLB6129とFOSの投与群では、生理食塩水の投与群(I)などと比べて有意差があった(図5)。なお、B. breve OLB6129のみの投与群と、B. breve OLB6129とFOSの投与群の2群(OLB6129 +)について、便中の B. breve OLB6129(投与菌)の菌数を測定したところ、FOSの投与群において生菌数が有意に高く観察された(図6)。
本明細書で引用した全ての刊行物、特許および特許出願をそのまま参考として本明細書にとり入れるものとする。
Claims (7)
- 腸内腐敗物質を低減させる微生物の in vitro のスクリーニング方法において、グルコースの濃度が0.3〜0.7(w/v)%となるように反応液へ添加することを特徴とする、前記方法。
- 微生物を反応液に懸濁させ、37℃で24時間反応させた後に、微生物を除去し、反応液からジエチルエーテルを用いて腸内腐敗物質を抽出して測定することを特徴とする、請求項1記載のスクリーニング方法。
- 腸内腐敗物質が、少なくとも、インドール、フェノール、p-クレゾール、スカトールの中から選ばれる1つである、請求項2記載のスクリーニング方法。
- 腸内腐敗物質を低減させる微生物の in vivo のスクリーニング方法であって、フラクトオリゴ糖(FOS)及び/又はガラクトオリゴ糖(GOS)、並びにトリプトファン(L-Tryptophan)を食餌へ添加し、マウスを飼育して、血清中のインドキシル硫酸の濃度を評価することを特徴とする、前記方法。
- 請求項1〜3のいずれか1項に記載の、腸内腐敗物質を低減させる微生物のin vitro のスクリーニング方法を、あらかじめ実施することを特徴とする、請求項4に記載の腸内腐敗物質を低減させる微生物の in vivo のスクリーニング方法。
- フラクトオリゴ糖(FOS)の濃度及び/又はガラクトオリゴ糖(GOS)の濃度を0.5〜20(w/v)%、並びにトリプトファンの濃度を1〜4(w/v)%とする請求項4又は5に記載の方法。
- 微生物を乳酸菌及び/又はビフィズス菌とする請求項1〜6のいずれか1項に記載の方法。
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WO2022091736A1 (ja) | 2020-10-29 | 2022-05-05 | 旭松食品株式会社 | 腸内細菌叢改善用組成物及び腸内腐敗物質産生抑制用組成物 |
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CN104988104B (zh) * | 2015-08-13 | 2017-12-26 | 山东凤凰生物有限公司 | 一株具有吸附或降解肠毒素功能的乳酸菌及其应用 |
CN106819107A (zh) * | 2016-12-29 | 2017-06-13 | 石家庄君乐宝乳业有限公司 | 具有整肠作用的发酵乳饮料及其制备方法 |
JP2018177752A (ja) * | 2017-04-18 | 2018-11-15 | 国立大学法人東北大学 | アルカリ性化剤による血液浄化 |
JP7219898B2 (ja) * | 2017-04-18 | 2023-02-09 | 国立大学法人東北大学 | アルカリ性化剤による血液浄化 |
WO2018193648A1 (ja) * | 2017-04-18 | 2018-10-25 | 国立大学法人東北大学 | アルカリ性化剤による血液浄化 |
JP7309436B2 (ja) * | 2019-04-26 | 2023-07-18 | 森永乳業株式会社 | 腎機能障害予防又は改善用組成物、並びに、該腎機能障害予防又は改善用組成物を用いた医薬品組成物及び飲食品組成物 |
MX2022004635A (es) * | 2019-10-21 | 2022-05-10 | Biofermin Pharmaceutical Co Ltd | Agente reductor de toxina uremica. |
CN113005049B (zh) * | 2020-12-30 | 2022-11-01 | 江南大学 | 一株可缓解腹泻的短双歧杆菌及其应用 |
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CN102959075B (zh) | 2016-03-02 |
HK1183058A1 (zh) | 2013-12-13 |
CN105671120A (zh) | 2016-06-15 |
CN105671120B (zh) | 2019-02-19 |
CN102959075A (zh) | 2013-03-06 |
JP6096263B2 (ja) | 2017-03-15 |
HK1221748A1 (zh) | 2017-06-09 |
WO2012005240A1 (ja) | 2012-01-12 |
JPWO2012005240A1 (ja) | 2013-09-02 |
JP5837879B2 (ja) | 2015-12-24 |
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