JP3726875B2 - Periodontal disease bacterial endotoxin neutralizer, periodontal disease causative agent inhibitor and oral composition - Google Patents
Periodontal disease bacterial endotoxin neutralizer, periodontal disease causative agent inhibitor and oral composition Download PDFInfo
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Description
【0001】
【発明の属する技術分野】
本発明は、歯周病細菌内毒素中和剤、歯周病原因菌付着抑制剤、更には、歯周病細菌内毒素を中和し、また歯周病原因菌の付着を抑制することにより歯周疾患の予防や治療用に有効な口腔組成物に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
歯周疾患の病原性因子として、付着因子(線毛、レクチン様リガンド)、内毒素、組織破壊性酵素(コラゲナーゼ、トリプシン様酵素)、白血球抵抗因子(莢膜、スーパーオキサイドデスムターゼ、ロイコトリエン)及び細胞毒性代謝物(硫化水素、脂肪酸)などがある。なかでも細菌内毒素は、直接あるいは間接的に歯周組織に対して炎症を惹起したり、歯槽骨吸収を促進したりすることが確認されている。
【0003】
そこで内毒素の関与する歯周疾患の予防、治療の従来技術として、マクロライド系抗生物質による歯周組織再生の前処置剤(特開平7−267867号公報)、オクタデシルプロピルジメチルアンモニウム固定の水不溶性固体による内毒素吸着除去剤(特開平8−26954号公報)が提案されている。
【0004】
しかしながら、これらの技術を歯周疾患の予防、治療に応用するには、耐性菌の出現、副作用および歯牙へのステイン付着等の問題があった。従って、細菌内毒素を中和し得るより有効な技術の開発が望まれていた。
【0005】
一方、歯周病原因菌の付着を抑制、防止する代表薬剤としてクロルヘキシジンがあるが、歯牙への着色問題や味覚への影響があった(縁下プラークの抑制法、クインテッセンス出版株式会社発行、1991年9月30日)。
【0006】
このように本発明は、上記事情に鑑みなされたもので、優れた細菌内毒素活性抑制作用を有し、また、細菌の歯牙、粘膜に対する付着抑制効果も期待でき、しかも長期間使用しても安全な歯周病細菌内毒素中和剤、歯周病原因菌付着抑制剤及び口腔用組成物を提供することを目的とする。
【0007】
【課題を解決するための手段および発明の実施の形態】
本発明者は上記目的を達成するため鋭意検討を重ねた結果、(I)ラクトフェリン、ラクトフェリン分解物およびラクトフェリン関連ペプチドから選ばれる1種以上と(II)構成アミノ酸数が1〜3個である成分とを組み合わせた場合、後述する実験例から認められるように、アクチノバシルス・アクチノマイセテムコミタンス(Actinobacillus actinomycetemcomitans)、ポルフィロモナス・ジンジバリス(Porphyromonas gingivalis)、フゾバクテリウム・ヌクレエータム(Fusobacterium nucleatum)等の歯周病細菌の内毒素を効果的に中和し得ること、また、アクチノマイセス・ナエスランデイ(Actinomyces naeslundii)等の歯周病原因菌の付着を抑制し得ることから、歯周疾患の予防及び治療に応用できる口腔用組成物が得られることを知見し、本発明をなすに至った。
【0008】
従って、本発明は、(I)ラクトフェリン、ラクトフェリン分解物およびラクトフェリン関連ペプチドから選ばれる1種以上と、(II)グルタミン酸、アスパラギン酸、グリシン、アラニン、ロイシン、ヒスチジンおよびプロリンから選ばれる1種又は2種以上のアミノ酸からなり、構成アミノ酸数が1〜3個であるアミノ酸又はペプチド成分とからなる、アクチノバシルス・アクチノマイセテムコミタンス(Actinobacillus actinomycetemcomitans)、ポルフィロモナス・ジンジバリス(Porphyromonas gingivalis)、フゾバクテリウム・ヌクレエータム(Fusobacterium nucleatum)から選ばれる歯周病細菌内毒素中和剤およびアクチノマイセス・ナエスランデイ(Actinomyces naeslundii)の歯周病原因菌付着抑制剤、上記(I)成分を組成物全体に対して固形分重量で0.001〜3%と(II)成分を組成物全体に対して固形分重量で0.001〜5%とを、前記(I)/(II)の配合比率(モル比)が0.0001〜10の範囲で、上記特定菌の歯周病細菌内毒素中和および/または歯周病原因菌付着抑制有効成分として含有してなることを特徴とする口腔用組成物を提供する。
【0009】
以下、本発明を具体的に説明する。本発明で用いられるラクトフェリンは動物の体内に広く分布しているものであり、ラクトフェリンの生物学的機能としては、抗菌作用、抗ウイルス作用、生体防御作用および内毒素中和作用を有し、ムチン産生促進剤(特開平9−12473号公報)、新規医薬組成物(特開平8−217693号公報)等が特許出願されている。
【0010】
本発明に提供されるラクトフェリン関連成分の資源としては、哺乳動物の乳牛からの生産物、植物(トマト、イネ、タバコ)からの生産物、麹カビからの生産物、牛乳中で産生したヒト型ラクトフェリンおよび合成品のいずれであっても良い。本発明に提供するラクトフェリンは、特にウシ由来のものが好ましい。
【0011】
本発明に提供するラクトフェリン分解物とは、酸分解物、ペプシン分解物を指し、ラクトフェリンと同様の生物学的機能を有している。ラクトフェリン酸加水分解物を有効成分とする抗菌剤およびそれを配合した化粧料(特開平6−279310号公報)、抗菌剤とこの抗菌剤を用いて物品を処理する方法(特開平5−320067号公報)等が特許出願されている。本発明に用いるラクトフェリン分解物は、特に酸分解物が好ましい。
【0012】
本発明に提供されるラクトフェリン関連ペプチドとは、15個から50個のアミノ酸で構成されたラクトフェリンおよびその分解物由来のペプチドを指す。これらペプチドの生物学的機能としては、強い抗菌作用、生体防御作用および内毒素中和作用があげられ、抗菌剤とこの抗菌剤を用いて物品を処理する方法(特開平5−320067)が特許出願されている。ラクトフェリン関連ペプチドは、特に25個のアミノ酸からなるウシ・ラクトフェリンのN−末端から調製したラクトフェリシンBが良い。
【0013】
ラクトフェリン、ラクトフェリン分解物およびラクトフェリン関連ペプチド(I)の配合量は、口腔用組成物全体の0.001〜3%(固形分重量、以下同様)、特に0.01〜1.5%とすることが好ましい。0.001%未満であると、アミノ酸、又は2〜3個のアミノ酸からなるペプチドと組み合わせた場合、口腔唾液中および歯肉溝滲出液中の内毒素を十分に抑制できないし、又、歯周病原因菌の歯牙、粘膜への付着抑制も十分でない。3%を超えると、効果が定常に達し、又、製剤中での溶解性、安定性に問題が生ずる。
【0014】
本発明で提供される(II)構成アミノ酸数が1〜3個である成分はグルタミン酸、アスパラギン酸、グリシン、アラニン、ロイシン、ヒスチジンおよびプロリンから選ばれる1種又は2種以上のアミノ酸からなり、L−アスパラギン酸、L−グルタミン酸、グリシン、L−アラニン、L−ロイシン、L−ヒスチジン、L−プロリン、L−ロイシル−L−アラニン、DL−アラニル−DL−アラニン、グリシル−L−ロイシン、グリシル−L−プロリン、グリシル−グリシン、DL−アラニル−DL−ノルバリン、L−ロイシル−グリシル−グリシン、グリシル−グリシル−L−ヒスチジン、グリシル−グリシル−グリシン等があり、特にL−アスパラギン酸、L−グルタミン酸、L−ロイシル−L−アラニン、DL−アラニル−DL−アラニンおよびL−ロイシル−グリシル−グリシンが配合成分として好ましい。
【0015】
これらの成分の配合量(II)は、口腔用組成物全体の0.001〜5%、特に0.01〜3%とすることが好ましい。0.001%未満であると、ラクトフェリン類と組み合わせた場合、口腔唾液中および歯肉溝滲出液中の内毒素を十分に抑制できず、又、歯周病原因菌の歯牙、粘膜への付着抑制も期待できない。5%を超えると、効果が定常に達し、又、製剤中での溶解性、安定性に問題が生ずる。
【0016】
(I)/(II)の配合比率(モル比)は0.0001〜10とすることが好ましい。10-5未満であると、期待以上の相乗効果が出にくく、1000を超えると相乗効果が定常に達する。
【0017】
本発明の口腔用組成物には、上記以外の成分とし通常の口腔用組成物に使用されている成分を用いることができ、これらの成分の添加量は、本発明の効果を妨げない範囲で通常量とすることができる。
【0018】
歯磨類の場合は、例えば、研磨剤、粘結剤、粘稠剤、界面活性剤、甘味剤、防腐剤、香料、着色剤、上記以外の各種有効成分などを常用量配合し得、これら成分を水と混合して製造することができる。
【0019】
本発明の口腔用組成物は、(I)ラクトフェリン、ラクトフェリン分解物およびラクトフェリン関連ペプチドから選ばれる1種以上と(II)構成アミノ酸数が1〜3個である成分とを組み合わせたものを有効成分として含有するもので、練歯磨、液状歯磨などの歯磨剤、口腔用軟膏、洗口剤、うがい用錠剤、トローチ、チュウインガムなどとして調製される。
【0020】
【発明の効果】
本発明によれば、優れた細菌内毒素活性抑制、細菌付着抑制効果を有し、しかも長期間使用しても安全であり、歯周疾患の予防や治療に好適に利用することができる。
【0021】
【実験例】
以下、調製例、実験例、実施例を挙げて本発明を具体的に説明するが、本発明は下記の例に制限されるものではない。
【0022】
[調製例1] ウシ・ラクトフェリンの調製
新鮮なウシ・ホエーの硫安沈殿物を水に溶解して、セファデックスG−25のカラムを通し脱塩を行った。脱塩蛋白をpH7.3のリン酸緩衝生理食塩水に溶解し、抗ウシ・ラクトフェリンモノクローナル抗体アフィニテイカラムに通し、さらにリン酸緩衝生理食塩水で洗浄した。その後、0.15Mの食塩を含むpH3.7の0.25M酢酸ナトリウム緩衝液でカラムよりウシ・ラクトフェリンを溶出し、凍結乾燥により目的物を得た。
【0023】
[調製例2] ウシ・ラクトフェリン酸分解物の調製
ラクトフェリン酸分解物は、凍結乾燥前のカラム溶出物を50%クエン酸にてpHを3以下に調製後、加水分解処理を行った(95℃まで加熱後、1時間放置)。分解物を冷却後、2N水酸化ナトリウム溶液にてpHを中性付近に調整し、精製水で3日間透析し、透析物を凍結乾燥してラクトフェリン酸加水分解物を得た。
【0024】
[調製例3] ラクトフェリンペプチドの調製
目的のラクトフェリンペプチドは、上記の調製例1、2で得られたラクトフェリン加水分解物を通常の液体クロマトグラフィー法を用いて単離することができる。例えば、TSKゲルODS120T(東ソー社製)を用いた高速液体クロマトグラフィー法で、アセトニトリルのグラジエントで分画溶出させて単離することができる(特開平5−320067号公報参考)。
その他の方法としては、上記のようにして得たペプチドのアミノ酸配列を公知の方法(気相シークエンサーを用いる方法など)によって決定し、それらのアミノ酸配列を有するペプチドを公知の方法(ペプチド自動合成装置など)で合成して目的のペプチドを調製することができる(例:配列番号1、2)。
【0025】
〔実験例1〕 インビトロ内毒素活性抑制試験
エンドスペーシー法(生化学工業(株)製)を変法して、下記方法でインビトロ内毒素活性抑制試験を行った。
歯周病の原因菌であるアクチノバシルス・アクチノマイセテムコミタンス Y4、ポルフィロモナス・ジンジバリス 381及びフゾバクテリウム・ヌクレエータムの内毒素(以下、それぞれAa LPS、Pg LPS、Fn LPSと略す)各1μg/mlと表1〜4に示すような各種薬剤(1×10−4M)1mlとを37℃、30分インキュベーション後、各LPSが100pg/mlになるように希釈して、エンドスペシー法による内毒素活性抑制率を測定した。結果を表1〜4に示す。なお、表中の内毒素活性抑制率は下記式により算出した。
内毒素活性抑制率(%)=(A−B)/A× 100
A=(内毒素単独のABS)−(注射用蒸留水のABS)
B=((薬剤+内毒素)のABS)−(注射用蒸留水のABS)
ABS:545nmの吸光度
【0026】
表1〜表4の結果より、(I)ラクトフェリン、ラクトフェリン分解物およびラクトフェリン関連ペプチドから選ばれる1種以上と(II)構成アミノ酸数が1〜3個である成分とを組み合わせたものが、インビトロ内毒素活性抑制効果に優れていることが確認された。
【0027】
【表1】
【0028】
【表2】
【0029】
【表3】
【0030】
【表4】
【0031】
〔実験例2〕家兎皮内毒性試験による細菌内毒素活性抑制試験
内毒素活性抑制(Primary skin reaction)試験
家兎腹部をバリカンで除毛後、皮内に表5に示すように内毒素又は内毒素と薬剤の混合液(注射前に37℃、30分間反応)をそれぞれ家兎腹部に0.1ml注射した。48時間後に注射部位の発赤、腫脹の大きさ(縦×横)を測定して内毒素活性抑制を評価した。なお、抑制率は下記式により算出した。
抑制率(%)=(A−B)/A× 100
A=内毒素注射部位の面積
B=(内毒素+検体)注射部位の面積
【0032】
【表5】
【0033】
〔実験例3〕局所シュワルツマン反応(Local Schwarzman reaction)
Primary skin reaction判定後、家兎耳静脈に表6に示すように細菌内毒素を100μg/kg(体重)注射し、24時間後に皮内注射部位の紅斑、出血性壊死の大きさ(縦×横)や程度を測定して内毒素活性抑制を評価した。結果を表6に示す。なお、抑制率は下記式により算出した。
抑制率(%)=(A−B)/A×100
A=内毒素注射部位の面積
B=(内毒素+検体)注射部位の面積
【0034】
【表6】
【0035】
〔実験例4〕アクチノマイセス・ナエスランディ付着阻止実験
ハイドロオキシアパタイト粉末(BHDケミカル社製)(以下、HAと略す)5mgをポリスチレン製マルチプレート(住友ベークライト社製)の各ウエルに入れ、KCl緩衝液(50mM KCl、1mM KH2PO4、1mM CaCl2、0.1mM MgCl2、pH 6.0)で洗浄後、ヒト全唾液の遠心上清(12,000rpm、20分間)125μlを加えて、室温で60分間反応させた。次に、HAをKCl緩衝液で洗浄し、表7、8に示す0.1%の各薬剤125μlを加えて30分間反応させた。
【0036】
HAを緩衝液で洗浄した後、3H−チミジンを含む培地で培養して放射ラベルしたアクチノマイセス・ナエスランディT14V(1×108/ml)125μlを加えて、室温で60分間反応させた。HAをKCl緩衝液で洗浄し、HAに付着した細菌の放射活性を液体シンチュレーションカウンターで測定した。結果を表7、8に示す。なお、付着抑制率は下記式より算出した。
付着抑制率(%)=(A−B)/A×100
A:検体無添加時の細菌付着数
B:検体添加時の細菌付着数
【0037】
【表7】
【0038】
【表8】
【0039】
以下、実施例を示す。
【0040】
【0041】
【0042】
【0043】
【0044】
【0045】
【0046】
【0047】
【0048】
【0049】
【0050】
【配列表】
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a periodontal disease bacterial endotoxin neutralizing agent, a periodontal disease causative bacteria adhesion inhibitor, and further to neutralize periodontal disease bacterial endotoxin and to inhibit the adhesion of periodontal disease causative bacteria. yo Ri to an effective oral composition for the prevention and treatment of periodontal disease.
[0002]
[Prior art and problems to be solved by the invention]
As pathogenic factors for periodontal diseases, adhesion factors (pilus, lectin-like ligand), endotoxin, tissue destructive enzymes (collagenase, trypsin-like enzyme), leukocyte resistance factor (capsule, superoxide desmutase, leukotriene) and Examples include cytotoxic metabolites (hydrogen sulfide, fatty acids). Among them, bacterial endotoxins have been confirmed to cause inflammation or periodontal bone resorption directly or indirectly against periodontal tissue.
[0003]
Therefore, as a conventional technique for the prevention and treatment of periodontal diseases involving endotoxin, a pretreatment agent for periodontal tissue regeneration with macrolide antibiotics (Japanese Patent Laid-Open No. 7-267867), water-insoluble with octadecylpropyldimethylammonium fixation A solid endotoxin adsorption / removal agent (JP-A-8-26954) has been proposed.
[0004]
However, when these techniques are applied to the prevention and treatment of periodontal diseases, there have been problems such as the appearance of resistant bacteria, side effects, and adhesion of stains to teeth. Therefore, development of a more effective technique capable of neutralizing bacterial endotoxin has been desired.
[0005]
On the other hand, chlorhexidine is a representative agent for suppressing and preventing periodontal disease-causing bacteria, but there was a coloring problem on the teeth and an effect on taste (publishing method of submarine plaque, published by Quintessence Publishing Co., Ltd., 1991). September 30th).
[0006]
Thus, the present invention has been made in view of the above circumstances, has an excellent inhibitory effect on bacterial endotoxin activity, can also be expected to have an inhibitory effect on bacterial teeth and mucous membranes, and can be used for a long time. It is an object to provide a safe periodontal disease bacterial endotoxin neutralizing agent, a periodontal disease causative agent inhibitor and an oral composition.
[0007]
Means for Solving the Problem and Embodiment of the Invention
As a result of intensive studies to achieve the above object, the present inventor has (I) one or more selected from lactoferrin, a lactoferrin degradation product and a lactoferrin-related peptide, and (II) a component having 1 to 3 constituent amino acids. As shown in the experimental examples to be described later, Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Fuzobacterium um The ability to effectively neutralize endotoxins of peri-bacterial bacteria; and Actinomyces naeslundii It was found that an oral composition that can be applied to the prevention and treatment of periodontal diseases can be obtained from the fact that the adhesion of periodontal disease-causing bacteria such as
[0008]
Accordingly, the present invention provides (I) one or more selected from lactoferrin, lactoferrin degradation products and lactoferrin-related peptides, and (II) one or two selected from glutamic acid, aspartic acid, glycine, alanine, leucine, histidine and proline. Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Porphyromonas gingivalis, consisting of more than one kind of amino acid and consisting of an amino acid or peptide component having 1 to 3 constituent amino acids Periodontal bacterial endotoxin neutralizer and actinomyces selected from nucleatum (Fusobacterium nucleatum) Esurandei periodontal disease-causing bacteria adhesion inhibitor (Actinomyces naeslundii), the (I) a solid component and from 0.001 to 3% by solids weight of the total composition of component (II) of the total composition 0.001 to 5% by weight, neutralization of periodontal disease bacterial endotoxin of the specific bacteria and (I) / (II) in the range of 0.0001 to 10 (molar ratio) Provided is an oral composition characterized in that it is contained as an active ingredient for inhibiting periodontal disease-causing adhesion.
[0009]
Hereinafter, the present invention will be specifically described. The lactoferrin used in the present invention is widely distributed in the body of an animal, and the biological functions of lactoferrin have antibacterial action, antiviral action, biological defense action and endotoxin neutralizing action, and mucin Patent applications have been filed for production promoters (JP-A-9-12473), novel pharmaceutical compositions (JP-A-8-217693), and the like.
[0010]
Examples of the resources of the lactoferrin-related components provided in the present invention include products from mammalian dairy cows, products from plants (tomatoes, rice, tobacco), products from bran mold, human forms produced in milk Either lactoferrin or a synthetic product may be used. The lactoferrin provided in the present invention is particularly preferably derived from bovine.
[0011]
The lactoferrin degradation product provided in the present invention refers to an acid degradation product and a pepsin degradation product, and has the same biological function as lactoferrin. Antibacterial agent containing lactoferric acid hydrolyzate as an active ingredient and cosmetics containing the same (Japanese Patent Laid-Open No. 6-279310), antibacterial agent and method for treating articles using this antibacterial agent (Japanese Patent Laid-Open No. 5-320067) (Patent Publication) etc. have been applied for patents. The lactoferrin degradation product used in the present invention is particularly preferably an acid degradation product.
[0012]
The lactoferrin-related peptide provided in the present invention refers to a peptide derived from lactoferrin composed of 15 to 50 amino acids and a degradation product thereof. Biological functions of these peptides include strong antibacterial action, bioprotective action and endotoxin neutralizing action. An antibacterial agent and a method for treating articles using this antibacterial agent (Japanese Patent Laid-Open No. 5-320067) are patented. An application has been filed. The lactoferrin-related peptide is particularly preferably lactoferricin B prepared from the N-terminus of bovine lactoferrin consisting of 25 amino acids.
[0013]
The blending amount of lactoferrin, lactoferrin degradation product and lactoferrin-related peptide (I) should be 0.001 to 3% of the whole oral composition (solid content weight, the same applies hereinafter), particularly 0.01 to 1.5%. Is preferred. When it is less than 0.001%, when combined with an amino acid or a peptide consisting of 2 to 3 amino acids, endotoxin in oral saliva and gingival crevicular fluid cannot be sufficiently suppressed, and periodontal disease Inhibition of causative bacteria on teeth and mucous membranes is not sufficient. If it exceeds 3%, the effect reaches a steady state, and there is a problem in solubility and stability in the preparation.
[0014]
The component (II) having 1 to 3 constituent amino acids provided in the present invention consists of one or more amino acids selected from glutamic acid, aspartic acid, glycine, alanine, leucine, histidine and proline, and L -Aspartic acid, L-glutamic acid, glycine, L-alanine, L-leucine, L-histidine, L-proline, L-leucyl-L-alanine, DL-alanyl-DL-alanine, glycyl-L-leucine, glycyl- L-proline, glycyl-glycine, DL-alanyl-DL-norvaline, L-leucyl-glycyl-glycine, glycyl-glycyl-L-histidine, glycyl-glycyl-glycine, etc., especially L-aspartic acid, L-glutamic acid , L-Leucyl-L-alanine, DL-alanyl-DL-ara Emissions and L- leucyl - glycyl - glycine is preferred as a blending component.
[0015]
The blending amount (II) of these components is preferably 0.001 to 5%, particularly 0.01 to 3% of the whole oral composition. If it is less than 0.001%, endotoxin in oral saliva and gingival crevicular fluid cannot be sufficiently suppressed when combined with lactoferrin, and adhesion of periodontal disease-causing bacteria to teeth and mucous membranes is suppressed. I can't expect. If it exceeds 5%, the effect reaches a steady state, and there is a problem in solubility and stability in the preparation.
[0016]
The blending ratio (molar ratio) of (I) / (II) is preferably 0.0001-10. If it is less than 10 −5, it is difficult to produce a synergistic effect more than expected, and if it exceeds 1000, the synergistic effect reaches a steady state.
[0017]
In the composition for oral cavity of the present invention, components other than those described above, which are used in ordinary oral compositions, can be used, and the amount of these components added is within a range that does not hinder the effects of the present invention. It can be a normal amount.
[0018]
In the case of dentifrice, for example, abrasives, binders, thickeners, surfactants, sweeteners, preservatives, fragrances, colorants, various active ingredients other than the above, etc. Can be mixed with water.
[0019]
The composition for oral cavity of the present invention comprises (I) one or more selected from lactoferrin, a lactoferrin degradation product and a lactoferrin-related peptide and (II) a combination of components having 1 to 3 constituent amino acids as an active ingredient It is prepared as toothpaste such as toothpaste and liquid toothpaste, oral ointment, mouthwash, gargle tablet, troche, chewing gum and the like.
[0020]
【The invention's effect】
According to the present invention, it has excellent bacterial endotoxin activity suppression and bacterial adhesion suppression effects, is safe even when used for a long time, and can be suitably used for the prevention and treatment of periodontal diseases.
[0021]
[Experimental example]
EXAMPLES Hereinafter, the present invention will be specifically described with reference to preparation examples, experimental examples, and examples, but the present invention is not limited to the following examples.
[0022]
[Preparation Example 1] Preparation of bovine lactoferrin Fresh ammonium sulfate precipitate of bovine whey was dissolved in water, and desalted through a Sephadex G-25 column. The desalted protein was dissolved in phosphate buffered saline at pH 7.3, passed through an anti-bovine lactoferrin monoclonal antibody affinity column, and further washed with phosphate buffered saline. Thereafter, bovine lactoferrin was eluted from the column with a 0.25 M sodium acetate buffer solution having a pH of 3.7 containing 0.15 M sodium chloride, and the desired product was obtained by lyophilization.
[0023]
[Preparation Example 2] Preparation of Bovine Lactoferric Acid Decomposition Product The lactoferric acid decomposition product was hydrolyzed after adjusting the pH of the column eluate before lyophilization to 3 or less with 50% citric acid (95 ° C). Until heated for 1 hour). After the degradation product was cooled, the pH was adjusted to near neutral with 2N sodium hydroxide solution, dialyzed against purified water for 3 days, and the dialyzate was freeze-dried to obtain a lactoferric acid hydrolyzate.
[0024]
[Preparation Example 3] The lactoferrin peptide intended for preparation of the lactoferrin peptide can be isolated from the lactoferrin hydrolyzate obtained in Preparation Examples 1 and 2 using a conventional liquid chromatography method. For example, it can be isolated by fractionating and eluting with a gradient of acetonitrile by high performance liquid chromatography using TSK gel ODS120T (manufactured by Tosoh Corporation) (see JP-A-5-320067).
As other methods, the amino acid sequence of the peptide obtained as described above is determined by a known method (such as a method using a gas phase sequencer), and a peptide having those amino acid sequences is determined by a known method (peptide automatic synthesizer). Etc.) to prepare the target peptide (eg, SEQ ID NOs: 1 and 2).
[0025]
[Experimental Example 1] In vitro endotoxin activity inhibition test An in vitro endotoxin activity inhibition test was performed by the following method, using a modified endospace method (Seikagaku Corporation).
Actinobacillus actinomycetemcomitans Y4, Porphyromonas gingivalis 381 and Fusobacterium nucleatum endotoxin (hereinafter abbreviated as Aa LPS, Pg LPS, and Fn LPS, respectively) 1 μg / 1 ml of various drugs (1 × 10 −4 M) as shown in Tables 1 to 4 after incubation at 37 ° C. for 30 minutes, diluted so that each LPS becomes 100 pg / ml, and endotoxin by the end specie method The activity inhibition rate was measured. The results are shown in Tables 1-4. In addition, the endotoxin activity inhibition rate in the table was calculated by the following formula.
Endotoxin activity inhibition rate (%) = (A−B) / A × 100
A = (ABS of endotoxin alone) − (ABS of distilled water for injection)
B = ((Drug + Endotoxin ABS) − (ABS of distilled water for injection)
ABS: Absorbance at 545 nm
From the results of Tables 1 to 4, the combination of (I) one or more selected from lactoferrin, a lactoferrin degradation product and a lactoferrin-related peptide and (II) a component having 1 to 3 constituent amino acids is in vitro. It was confirmed that the effect of suppressing endotoxin activity is excellent.
[0027]
[Table 1]
[0028]
[Table 2]
[0029]
[Table 3]
[0030]
[Table 4]
[0031]
[Experimental Example 2] Bacterial Endotoxin Activity Inhibition Test by Rabbit Endodermal Toxicity Test Endotoxin Activity Inhibition Test (Primary skin reaction) 0.1 ml of a mixed solution of endotoxin and drug (reacted at 37 ° C. for 30 minutes before injection) was injected into the rabbit abdomen. 48 hours later, redness and swelling (length × width) at the injection site were measured to evaluate endotoxin activity inhibition. In addition, the suppression rate was computed by the following formula.
Inhibition rate (%) = (A−B) / A × 100
A = area of endotoxin injection site B = (endotoxin + specimen) area of injection site
[Table 5]
[0033]
[Experimental Example 3] Local Schwarzman reaction
After determining the primary skin reaction, 100 μg / kg (body weight) of bacterial endotoxin was injected into the rabbit ear vein as shown in Table 6. After 24 hours, the size of erythema and hemorrhagic necrosis at the site of intradermal injection (vertical x horizontal) ) And the degree were measured to evaluate the inhibition of endotoxin activity. The results are shown in Table 6. In addition, the suppression rate was computed by the following formula.
Inhibition rate (%) = (A−B) / A × 100
A = area of endotoxin injection site B = (endotoxin + specimen) area of injection site
[Table 6]
[0035]
[Experimental Example 4 ] Actinomyces naeslandi adhesion inhibition experiment 5 mg of hydroxyapatite powder (BHD Chemical) (hereinafter abbreviated as HA) was placed in each well of a polystyrene multiplate (Sumitomo Bakelite) and KCl. After washing with a buffer (50 mM KCl, 1 mM KH 2 PO 4 , 1 mM CaCl 2 , 0.1 mM MgCl 2 , pH 6.0), 125 μl of human whole saliva centrifugal supernatant (12,000 rpm, 20 minutes) was added. And reacted at room temperature for 60 minutes. Next, HA was washed with KCl buffer, and 125 μl of each 0.1% drug shown in Tables 7 and 8 was added and allowed to react for 30 minutes.
[0036]
After washing HA with a buffer, 125 μl of Actinomyces naeslandi T14V (1 × 10 8 / ml) radiolabeled by culturing in a medium containing 3 H-thymidine was added and reacted at room temperature for 60 minutes. . HA was washed with KCl buffer, and the radioactivity of bacteria attached to HA was measured with a liquid scintillation counter. The results are shown in Tables 7 and 8 . In addition, the adhesion suppression rate was computed from the following formula.
Adhesion suppression rate (%) = (A−B) / A × 100
A: Number of bacteria attached when no sample is added B: Number of bacteria attached when the sample is added [0037]
[Table 7]
[0038]
[Table 8]
[0039]
Examples will be described below.
[0040]
[0041]
[0042]
[0043]
[0044]
[0045]
[0046]
[0047]
[0048]
[0049]
[0050]
[Sequence Listing]
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JP29867399A JP3726875B2 (en) | 1999-09-14 | 1999-09-14 | Periodontal disease bacterial endotoxin neutralizer, periodontal disease causative agent inhibitor and oral composition |
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JP4592260B2 (en) * | 2003-05-29 | 2010-12-01 | 雪印乳業株式会社 | Lactoferrin composition |
JP5024505B2 (en) * | 2005-03-25 | 2012-09-12 | ライオン株式会社 | Remedy for hyperlipidemia caused by periodontal disease, oral composition and oral medicine |
JP5024506B2 (en) * | 2005-03-25 | 2012-09-12 | ライオン株式会社 | Periodontal tissue destruction inhibitor / ameliorant and oral composition |
JP4858699B2 (en) * | 2006-09-27 | 2012-01-18 | ライオン株式会社 | Teeth whitening set |
JP5709639B2 (en) * | 2011-05-02 | 2015-04-30 | ライオン株式会社 | Oral composition |
IT201900008910A1 (en) * | 2019-06-13 | 2020-12-13 | L I Co Rice S R L | COMPLEX BETWEEN A LACTOPHERRIN HYDROLYZATE AND A SILICA, PRODUCTION PROCESS OF THE SAME, AND RELATED USES. |
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JP2673320B2 (en) * | 1990-01-25 | 1997-11-05 | 雪印乳業株式会社 | Anti-cariogenic agent attachment inhibitor |
JPH0768111B2 (en) * | 1990-03-09 | 1995-07-26 | サンスター株式会社 | Oral composition |
JP3261174B2 (en) * | 1992-01-23 | 2002-02-25 | 森永乳業株式会社 | Antimicrobial agent and method of treating articles using this antimicrobial agent |
JPH05255109A (en) * | 1992-09-03 | 1993-10-05 | Morinaga Milk Ind Co Ltd | Antibacterial agent and treating method for article using the same |
JPH06279310A (en) * | 1993-03-31 | 1994-10-04 | Ichimaru Pharcos Co Ltd | Antibacterial agent containing acid-hydrolyzed lactoferrin as active component and cosmetic compounded with the agent |
JPH10158131A (en) * | 1996-11-26 | 1998-06-16 | Lion Corp | Oral composition |
JPH10298048A (en) * | 1997-04-30 | 1998-11-10 | Lion Corp | Neutralizing agent for periodontopathic bacterial endotoxin, suppressant for adhesion of periodontopathic causative bacterium and composition for oral cavity |
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