JP5749915B2 - Autoinducer-2 inhibitor - Google Patents
Autoinducer-2 inhibitor Download PDFInfo
- Publication number
- JP5749915B2 JP5749915B2 JP2010246116A JP2010246116A JP5749915B2 JP 5749915 B2 JP5749915 B2 JP 5749915B2 JP 2010246116 A JP2010246116 A JP 2010246116A JP 2010246116 A JP2010246116 A JP 2010246116A JP 5749915 B2 JP5749915 B2 JP 5749915B2
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- Prior art keywords
- bacteria
- acid
- autoinducer
- inhibitor
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Cosmetics (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Description
本発明は、オートインデューサー−2阻害剤に関する。 The present invention relates to an autoinducer-2 inhibitor.
自然界において、微生物は様々な環境下で生存しなければならない。貧栄養、低温度、高温、pH変化はもちろんのこと、生体内においては貪食細胞又は抗菌性液性因子(補体、抗体、リゾチーム等)が存在する環境での生存を余儀なくされる。このような状況下で、細菌は自らの存在環境の変化を敏感に感知する機構を獲得してきた。そのような機構の1つとして、微生物は特異的な情報伝達物質を介して環境における自らの密度を感知し、その密度に応じて自らの様々な生物活性を巧妙に制御していることが明らかとなっている。このような細胞間の情報伝達機構は、クオラムセンシングシステムと称される。 In nature, microorganisms must survive in various environments. In addition to oligotrophic, low temperature, high temperature, and pH change, living organisms are forced to survive in an environment where phagocytic cells or antibacterial humoral factors (complements, antibodies, lysozyme, etc.) are present. Under these circumstances, bacteria have acquired a mechanism for sensitively sensing changes in their environment. As one of such mechanisms, it is clear that microorganisms sense their own density in the environment through specific signaling substances and skillfully control their various biological activities according to their density. It has become. Such an information transmission mechanism between cells is called a quorum sensing system.
クオラムセンシングは、発光性海洋細菌であるビブリオ・フィシェリ及びビブリオ・ハーベイにおいて最初に報告された。しかし、最近では、多くの細菌における一般的な遺伝子調節機構であると認識されている。この現象により、細菌は、生物発光、スウォーミング、バイオフィルム形成、タンパク質分解酵素の産生、抗生物質の合成、遺伝子受容能の発達、プラスミド接合伝達、病原因子産生及び胞子形成などといった活動を一斉に行うことができる。 Quorum sensing was first reported in the luminescent marine bacteria Vibrio Fischeri and Vibrio Harvey. Recently, however, it has been recognized as a general gene regulatory mechanism in many bacteria. This phenomenon allows bacteria to perform activities such as bioluminescence, warming, biofilm formation, proteolytic enzyme production, antibiotic synthesis, gene acceptability development, plasmid conjugation transfer, virulence factor production and sporulation. Can be done.
クオラムセンシングシステムを有する細菌は、オートインデューサーと呼ばれるシグナル伝達分子を合成し、放出し、そのシグナル伝達分子に応答して、遺伝子発現を細胞密度の関数として制御する。これまで、アシルホモセリンラクトンがオートインデューサー−1として、4,5−ジヒドロキシ−2,3−ペンタンジオンがオートインデューサー−2として同定されている。 Bacteria with a quorum sensing system synthesize and release a signaling molecule called an autoinducer and respond to the signaling molecule to control gene expression as a function of cell density. So far, acyl homoserine lactone has been identified as autoinducer-1, and 4,5-dihydroxy-2,3-pentanedione as autoinducer-2.
ビブリオ属細菌、緑膿菌、セラチア、エンテロバクターなど臨床上重要な細菌がクオラムセンシングにオートインデューサー−1を利用することが報告されている。また、ビブリオ・ハーベイが、種内連絡には種特異性の高いオートインデューサー−1を利用し、種間連絡には種特異性の低いオートインデューサー−2を利用することが知られている。さらに最近の研究では、ある種の病原性細菌がオートインデューサー−2による種間でのクオラムセンシングにより、病原因子の産生を調節していることも示されている。このような病原性細菌としては、齲蝕原性菌であるストレプトコッカス・ミュータンス(Streptococcus mutans)、胃潰瘍及び胃ガンを惹起すると言われているヘリコバクター・ピロリ(Helicobacter pylori)、食中毒、ガス壊疽、出血性腸炎などの原因菌であるウェルシュ菌(Clostridium perfringens)等が挙げられる。従って、オートインデューサー−2を阻害する活性を有する物質が求められていた。 It has been reported that clinically important bacteria such as Vibrio bacteria, Pseudomonas aeruginosa, Serratia and Enterobacter use autoinducer-1 for quorum sensing. In addition, it is known that Vibrio Harvey uses autoinducer-1 with high species specificity for intra-species communication and uses autoinducer-2 with low species specificity for interspecies communication. . More recent studies have also shown that certain pathogenic bacteria regulate the production of virulence factors by quorum sensing between species with autoinducer-2. Such pathogenic bacteria include Streptococcus mutans , a cariogenic bacterium, Helicobacter pylori , which is said to cause gastric ulcer and gastric cancer, food poisoning, gas gangrene, hemorrhagic Examples include Clostridium perfringens, which is a causative bacterium such as enteritis. Therefore, a substance having an activity of inhibiting autoinducer-2 has been demanded.
オートインデューサー−2を阻害する物質としては、これまで、フラノン化合物、シクロペンテン化合物などが報告されている(例えば、特許文献1〜3参照)。 As substances that inhibit autoinducer-2, furanone compounds, cyclopentene compounds, and the like have been reported so far (see, for example, Patent Documents 1 to 3).
本発明は、オートインデューサー−2を阻害する活性を有し、感染症の予防及び治療等に有効な、オートインデューサー−2阻害剤の提供を課題とする。 An object of the present invention is to provide an autoinducer-2 inhibitor which has an activity of inhibiting autoinducer-2 and is effective for prevention and treatment of infectious diseases.
本発明者等は、上記課題に鑑み鋭意検討を行った。その結果、デカン酸及びドデカン酸、並びにこれらの塩がオートインデューサー−2を阻害する活性を有するとともに、感染症に対して有効な化合物であることを見い出した。本発明はこの知見に基づいて完成するに至った。 The present inventors have conducted intensive studies in view of the above problems. As a result, it has been found that decanoic acid and dodecanoic acid, and salts thereof have an activity of inhibiting autoinducer-2 and are effective compounds against infectious diseases. The present invention has been completed based on this finding.
本発明は、デカン酸及びドデカン酸、並びにこれらの塩からなる群より選ばれる少なくとも1種を有効成分とするオートインデューサー−2阻害剤に関する。
さらに、本発明は、前記オートインデューサー−2阻害剤を含有してなる、医薬組成物、食品組成物、口腔用組成物又は化粧料組成物に関する。
The present invention relates to an autoinducer-2 inhibitor comprising as an active ingredient at least one selected from the group consisting of decanoic acid, dodecanoic acid, and salts thereof.
Furthermore, the present invention relates to a pharmaceutical composition, a food composition, an oral composition or a cosmetic composition comprising the autoinducer-2 inhibitor.
本発明によれば、オートインデューサー−2を阻害する活性を有し、感染症の予防及び治療等に有効な、オートインデューサー−2阻害剤が提供される。 ADVANTAGE OF THE INVENTION According to this invention, the autoinducer-2 inhibitor which has the activity which inhibits autoinducer-2 and is effective in prevention, treatment, etc. of infectious disease is provided.
本発明に用いるデカン酸(カプリン酸)は、炭素数10の直鎖状の脂肪酸であり、ドデカン酸(ラウリン酸)は、炭素数12の直鎖状の脂肪酸である。これらはいずれも広く一般に入手できる。例えば、通常の合成方法により化学的に合成してもよいし、天然物から抽出してもよい。また、本発明では市販のものを用いてもよい。 Decanoic acid (capric acid) used in the present invention is a linear fatty acid having 10 carbon atoms, and dodecanoic acid (lauric acid) is a linear fatty acid having 12 carbon atoms. Both of these are widely available to the public. For example, it may be chemically synthesized by a normal synthesis method or extracted from a natural product. In the present invention, a commercially available product may be used.
デカン酸及びドデカン酸の塩としては、薬学的に許容できる塩であれば特に制限されないが、例えば、塩基付加塩が挙げられる。塩基付加塩としては、ナトリウム及びカリウム等のアルカリ金属との塩、カルシウム及びマグネシウム等のアルカリ土類金属との塩、アンモニウム及びトリエチルアミン等のアミン類との塩が挙げられる。本発明において、デカン酸の塩としては、ナトリウム塩及びカリウム塩が好ましく、ナトリウム塩がより好ましい。また、ドデカン酸の塩としては、ナトリウム塩及びカリウム塩が好ましく、ナトリウム塩がより好ましい。 The decanoic acid and dodecanoic acid salt are not particularly limited as long as they are pharmaceutically acceptable salts, and examples thereof include base addition salts. Base addition salts include salts with alkali metals such as sodium and potassium, salts with alkaline earth metals such as calcium and magnesium, and salts with amines such as ammonium and triethylamine. In the present invention, the salt of decanoic acid is preferably a sodium salt or a potassium salt, more preferably a sodium salt. Moreover, as a salt of dodecanoic acid, a sodium salt and potassium salt are preferable, and a sodium salt is more preferable.
本発明において、前記有効成分を溶媒に溶解/分散させ、オートインデューサー−2阻害剤としてもよい。本発明で用いることができる溶媒としては特に制限はないが、水、エタノール、プロピレングリコール、ジメチルスルホキサイド等が挙げられ、水及びエタノールが好ましい。 In the present invention, the active ingredient may be dissolved / dispersed in a solvent and used as an autoinducer-2 inhibitor. Although there is no restriction | limiting in particular as a solvent which can be used by this invention, Water, ethanol, propylene glycol, a dimethyl sulfoxide etc. are mentioned, Water and ethanol are preferable.
本発明のオートインデューサー−2阻害剤において、有効成分として、デカン酸及びドデカン酸、並びにこれらの塩のうちいずれか1種を用いてもよいし、2種以上を用いてもよい。 In the autoinducer-2 inhibitor of the present invention, as an active ingredient, any one of decanoic acid, dodecanoic acid, and salts thereof may be used, or two or more thereof may be used.
本発明におけるオートインデューサー−2(以下、「AI−2」ともいう)としては、細菌が産生するものでAI−2活性を有するものであれば特に制限はない。
本発明におけるAI−2の具体例としては、下記式で表される4,5−ジヒドロキシ−2,3−ペンタンジオン(本明細書において、DPDともいう)、及びDPDが有するAI−2活性と同等のAI−2活性を有する化合物が包含される。
The autoinducer-2 (hereinafter also referred to as “AI-2”) in the present invention is not particularly limited as long as it is produced by bacteria and has AI-2 activity.
Specific examples of AI-2 in the present invention include 4,5-dihydroxy-2,3-pentanedione (also referred to herein as DPD) represented by the following formula, and AI-2 activity possessed by DPD. Compounds having equivalent AI-2 activity are included.
前記DPDは、細菌のAI−2受容体と結合するときにボロンを取り込んで、フラノシルボレートジエステルに変換される。本発明におけるAI−2の別の具体例としては、前記フラノシルボレートジエステルが挙げられる。また、DPDはリン酸されてリン酸化DPD(Phospho-DPD)となり、AI−2活性を発現することが知られている(例えば、Taga M.et al.,Mol.Microbiol.,42,p.777-793,2001参照)。本発明におけるAI−2は、リン酸化DPDも包含する。
前記フラノシルボレートジエステル及びPhospho-DPDの具体例を以下に示す。しかし、本発明はこれらに制限するものではない。
When DPD binds to the bacterial AI-2 receptor, it incorporates boron and is converted to furanosyl borate diester. Another specific example of AI-2 in the present invention is the furanosyl borate diester. It is also known that DPD is phosphorylated to become phosphorylated DPD (Phospho-DPD) and expresses AI-2 activity (see, for example, Taga M. et al., Mol. Microbiol., 42, p. 777-793, 2001). AI-2 in the present invention includes phosphorylated DPD.
Specific examples of the furanosyl borate diester and Phospho-DPD are shown below. However, the present invention is not limited to these.
本発明においてAI−2を阻害することは、AI−2がクオラムセンシングを介して細菌に及ぼす影響を阻害することをさし、AI−2活性を阻害すること、AI−2分解すること、AI−2のAI−2受容体への結合を阻害することなどが包含される。 Inhibiting AI-2 in the present invention refers to inhibiting the effect of AI-2 on bacteria via quorum sensing, inhibiting AI-2 activity, decomposing AI-2, Inhibiting the binding of AI-2 to the AI-2 receptor is included.
本発明においてAI−2活性は、AI−2がクオラムセンシングシステムを有する細菌に影響を及ぼす活性、すなわち、AI−2を介するクオラムセンシングによりもたらされる細菌の機能を促進する活性をさす。細菌は、AI−2を介するクオラムセンシングにより、発光、スウォーミング、バイオフィルム形成、タンパク質分解酵素の産生、抗生物質の合成、遺伝子受容能の発達、プラスミド接合伝達、病原因子産生及び胞子形成等を行うことが知られている。したがって、AI−2活性は、換言すれば、AI−2を認識する細菌、すなわちAI−2受容体を有する細菌による生物発光、スウォーミング、バイオフィルム形成、タンパク質分解酵素の産生、抗生物質の合成、遺伝子受容能の発達、プラスミド接合伝達、病原因子産生及び/又は胞子形成の活性ということができる。本発明においてAI−2活性は、特に、細菌の病原因子産生活性をさす。 In the present invention, AI-2 activity refers to an activity in which AI-2 affects bacteria having a quorum sensing system, that is, an activity that promotes the function of bacteria brought about by quorum sensing via AI-2. Bacteria can luminescence, warming, biofilm formation, proteolytic enzyme production, antibiotic synthesis, gene acceptability development, plasmid conjugation transfer, pathogenic factor production and spore formation by quorum sensing via AI-2 Etc. are known to perform. Thus, AI-2 activity is, in other words, bioluminescence, warming, biofilm formation, proteolytic enzyme production, antibiotic production by bacteria that recognize AI-2, ie, bacteria having an AI-2 receptor. It can be referred to as activity of synthesis, development of gene acceptability, plasmid conjugation transfer, pathogenic factor production and / or sporulation. In the present invention, AI-2 activity particularly refers to bacterial pathogen production activity.
前記病原因子としては、例えば、エンテロトキシン、アデニル酸シクラーゼ毒素、アドヘシン、アルカリプロテアーゼ、溶血毒、炭疽毒素、APX毒素、α毒素、β毒素、δ毒素、C2毒素、C3毒素、ボツリヌス毒素、束状線毛構造サブユニット、C5Aペプチダーゼ、心臓毒、走化性、コレラ毒素、毛様体毒素、クロストリジウム細胞毒、クロストリジウム神経毒、コラーゲン接着遺伝子、細胞溶解素、嘔吐毒素、内毒素、表皮剥脱毒素、外毒素、細胞外エラスターゼ、フィブリノゲン、フィブロネクチン結合タンパク質、線維状赤血球凝集素、フィンブリア、ゼラチナーゼ、赤血球凝集素、ロイコトキシン、リポタンパク質シグナルペプチダーゼ、リステリオリシンO、Mタンパク質、神経毒、非フィンブリアアドヘシン類、浮腫因子、透過酵素、百日咳毒素、ホスホリパーゼ、線毛、孔形成毒素、プロリンパーミアーゼ、セリンプロテアーゼ、志賀毒素、破傷風毒素、チオール活性化細胞溶解素、気管細胞溶解素、ウレアーゼなどが挙げられるが、本発明はこれらに制限されない。 Examples of the pathogenic factor include enterotoxin, adenylate cyclase toxin, adhesin, alkaline protease, hemolytic toxin, anthrax toxin, APX toxin, α toxin, β toxin, δ toxin, C2 toxin, C3 toxin, botulinum toxin, bundled line Hair structure subunit, C5A peptidase, cardiotoxin, chemotaxis, cholera toxin, ciliary toxin, clostridial cytotoxin, clostridial neurotoxin, collagen adhesion gene, cytolysin, vomiting toxin, endotoxin, exfoliating toxin, external Toxin, extracellular elastase, fibrinogen, fibronectin binding protein, fibrillar hemagglutinin, fimbria, gelatinase, hemagglutinin, leukotoxin, lipoprotein signal peptidase, listeriolysin O, M protein, neurotoxin, non-fimbria adhesin Edema factor, Examples include hyperenzyme, pertussis toxin, phospholipase, pili, pore forming toxin, proline permease, serine protease, Shiga toxin, tetanus toxin, thiol activated cytolysin, tracheal cell lysin, urease, etc. It is not limited to these.
本発明のAI−2阻害剤の有効成分で影響を及ぼすことができる細菌、換言すれば、本発明のAI−2阻害剤の有効成分で増殖・生育を抑制できる細菌は、AI−2によりその機能、例えば、生物発光、スウォーミング、バイオフィルム形成、タンパク質分解酵素の産生、抗生物質の合成、遺伝子受容能の発達、プラスミド接合伝達、病原因子産生及び胞子形成などが促進される細菌である。例えば、AI−2受容体を有する細菌、好ましくはAI−2受容体を有し、AI−2を産生する細菌を対象とすることができる。 Bacteria that can be affected by the active ingredient of the AI-2 inhibitor of the present invention, in other words, bacteria that can suppress the growth and growth of the active ingredient of the AI-2 inhibitor of the present invention are expressed by AI-2. Bacteria whose functions are promoted such as bioluminescence, warming, biofilm formation, proteolytic enzyme production, antibiotic synthesis, gene acceptability development, plasmid conjugation transfer, pathogenic factor production and sporulation . For example, a bacterium having an AI-2 receptor, preferably a bacterium having an AI-2 receptor and producing AI-2 can be used.
AI−2活性は、AI−2を認識することにより発光するレポーター細菌、好ましくはAI−2受容体及びルシフェラーゼを有する細菌を用いるバイオアッセイにより測定することができる(例えば、Keersmaecker S.C.J.et al.,J.Biol.Chem.,280(20),p.19563-19568,2005参照)。具体的には、ビブリオ・ハーベイ(Vibrio harveyi)BB170株をレポーター細菌とし、被検化合物の存在下で培養し、培養後の発光強度をケミルミネッセンス計などで測定することにより、AI−2活性を測定することができる。 AI-2 activity can be measured by a bioassay using a reporter bacterium that emits light by recognizing AI-2, preferably a bacterium having an AI-2 receptor and luciferase (eg, Keersmaecker S.C.J. Et al., J. Biol. Chem., 280 (20), p. 19563-19568, 2005). Specifically, Vibrio harveyi BB170 strain is used as a reporter bacterium, cultured in the presence of a test compound, and the luminescence intensity after the culture is measured with a chemiluminescence meter, etc. Can be measured.
AI−2を阻害することにより影響を及ぼす、又は増殖・生育を抑制することができる細菌としては、例えば、ビブリオ(Vibrio)属細菌、シュードモナス(Pseudomonas)属細菌、ポルフィロモナス(Porphyromonas)属細菌、エルシニア(Yersinia)属細菌、エシェリキア(Escherichia)属細菌、サルモネラ(Salmonella)属細菌、ヘモフィルス(Haemophilus)属細菌、ヘリコバクター(Helicobacter)属細菌、バシルス(Bacillus)属細菌、ボレリア(Borrelia)属細菌、ナイセリア(Neisseria)属細菌、カンピロバクター(Campylobacter)属細菌、デイノコックス(Deinococcus)属細菌、ミコバクテリウム(Mycobacterium)属細菌、エンテロコッカス(Enterococcus)属細菌、ストレプトコッカス(Streptococcus)属細菌、シゲラ(Shigella)属細菌、エロモナス(Aeromonas)属細菌、エイケネラ(Eikenella)属細菌、クロストリジウム(Clostridium)属細菌、スタフィロコッカス(Staphylococcus)属細菌、ラクトバチルス(Lactobacillus)属細菌、アクチノバチルス(Actinobacillus)属細菌、アクチノマイセス(Actinomyces)属細菌、バクテロイデス(Bacteroides)属細菌、カプノサイトファガ(Capnocytophaga)属細菌、クレブシエラ(Klebsiella)属細菌、ハロバチルス(Halobacillus)属細菌、フゾバクテリウム(Fusobacterium)属細菌、エルウィニア(Erwinia)属細菌、エルベネラ(Elbenella)属細菌、ラクトバチルス(Lactobacillus)属細菌、リステリア(Listeria)属細菌、マンヘイミア(Mannheimia)属細菌、ペプトコッカス(Peptococcus)属細菌、プレボテラ(Prevotella)属細菌、プロテウス(Proteus)属細菌、セラチア(Serratia)属細菌及びベイロネラ(Veillonella)属細菌などが挙げられる。より具体的には、ビブリオ・ハーベイ(Vibrio harveyi)、ビブリオ・フィシェリ(Vibrio fischeri)、コレラ菌(Vibrio cholerae)、腸炎ビブリオ(Vibrio parahaemolyticus)、ビブリオ・アルギノリチカス(Vibrio alginolyticus)、シュードモナス・ホスホレウム(Pseudomonas phosphoreum)、ポリフィロモナス・ジンジバリス(Porphyromonas gingivalis)、エルシニア・エンテロコリチカ(Yersinia enterocolitica)、大腸菌(Escherichia coli)、ネズミチフス菌(Salmonella typhimurium)、インフルエンザ菌(Haemophilus influenzae)、ヘリコバクター・ピロリ(Helicobacter pylori)、枯草菌(Bacillus subtilis)、ボレリア・ブルグドルフェリ(Borrelia burgfdorferi)、髄膜炎菌(Neisseria meningitidis)、淋菌(Neisseria gonorrhoeae)、ペスト菌(Yersinia pestis)、カンピロバクター・ジェジュニ(Campylobacter jejuni)、デイノコックス・ラジオデュランス(Deinococcus radiodurans)、結核菌(Mycobacterium tuberculosis)、エンテロコッカス・フェカリス(Enterococcus faecalis)、肺炎レンサ球菌(Streptococcus pneumoniae)、化膿レンサ球菌(Streptococcus pyogenes)、ストレプトコッカス・ミュータンス(Streptococcus mutans)、黄色ブドウ球菌(Staphylococcus aureus)、箕田赤痢菌(Shigella flexneri)、シゲラ・ボイデイ(Shigella boydii)、セレウス菌(Bacillus cereus)、バチルス・クブチリス(Bacillus cubtilis)、エロモナス・ハイドロフィラ(Aeromonas hydrophila)、チフス菌(Salmonella enterica)、エイケネラ・コロデンス(Eikenella corrodens)、ヘリコバクター・ヘパティカス(Helicobacter hepaticus)、ウェルシュ菌(Clostridium perfringens)、スタフィロコッカス・ハエモリティカス(Staphylococcus haemolyticus)、ラクトバチルス・ガセリ(Lactobacillus gasseri)、ラクトバチルス アシドフィラス(Lactobacillus acidophilus)、ラクトバチルス・ロイテリ(Lactobacillus reuteri)、ラクトバチルス・サリバリウス(Lactobacillus salivarius)、ラクトバチルス・カゼイ(Lactobacillus casei)、ストレプトコッカス・サンギニス(Streptococcus sanguinis)、ストレプトコッカス・アンギノーサス(Streptococcus anginosus)、ストレプトコッカス・オラリス(Streptococcus oralis)、ストレプトコッカス・ボビス(Streptococcus bovis)、ストレプトコッカス・ゴルドニ(Streptococcus gordonii)、ストレプトコッカス・ミティス(Streptococcus mitis)、アクチノバチルス・アクチノマイセテムコミタンス(Actinobacillus actinomycetemcomitans)、ビブリオ・ブルニフィカス(Vivrio vulnificus)、ビブリオ・ミミクス(Vibrio mimicus)、ビブリオ・アングイラルム(Vibrio anguillarum)、ラクトバチルス・ラムノサス(Lactobacillus rhamnosus)、エルウィニア・アミロボラ(Erwinia amylovora)、エルウィニア・カロトバラ(Erwinia carotovara)、ハロバチルス・ハロフィラス(Halabacilus halophilus)、セラチア・ピムチカ(Serratia pymuthica)、セラチア・マルセセンス(Serratia marcescens)、バクテロイデス・フラジリス(Bacteroides fragilis)、バクテロイデス・ブルガタス(Bacteroides vulgatus)、バクテロイデス・ディスタソニス(Bacteroides distasonis)、リステリア・モノサイトジェネス(Listeria monocytogenes)、スタフィロコッカス・エピデルミディス(Staphylococcus epidermidis)、クロストリジウム・ディフィシル(Clostridium difficile)、アエロモナス・ハイドロフィリア(Aeromonas hydrophilia)、マンヘイミア・ハエモライティカ(Mannhemia haemolytica)、クレブシエラ・ニューモニアエ(Klebsiella pneumoniae)、バチルス・アンスラシス(Bacillus anthracis)、カンピロバクター・コリ(Campylobacter coli)、カンピロバクター・レクタス(Campylobacter rectus)、プロテウス・ミラビリス(Proteus mirabilis)、アクチノマイセス・ナエスランディ(Actinomyces naeslundii)、ペプトコッカス・アナエロビウス(Peptococcus anaerobius)、フゾバクテリウム・ヌクレアタム(Fusobacterium nucleatum)、ベイロネラ・パルラ(Veillonella parvula)、カプノサイトファガ・スプティゲナ(Capnocytophaga sputigena)及びプレボテラ・インタメディア(Prevotella intermedia)などが挙げられる。 Examples of bacteria that can be affected by inhibiting AI-2 or that can suppress proliferation and growth include bacteria belonging to the genus Vibrio, bacteria belonging to the genus Pseudomonas, bacteria belonging to the genus Porphyromonas. , Yersinia (Yersinia) bacteria, Escherichia (Escherichia) bacteria, Salmonella (Salmonella) bacteria, Haemophilus (Haemophilus) bacteria, Helicobacter (Helicobacter) bacteria, Bacillus (Bacillus) bacteria, Borrelia (Borrelia) bacteria, Neisseria (Neisseria) bacteria belonging to the genus Campylobacter (Campylobacter) bacteria belonging to the genus, Day Roh Cox (Deinococcus) bacteria belonging to the genus Mycobacterium (Mycobacterium) bacteria belonging to the genus Enterococcus (Enterococcus) bacteria belonging to the genus Streptococcus (Streptococcus) bacteria belonging to the genus Shigella (Shigella) genus Bacteria, Aeromonas ( Ae romonas) bacteria belonging to the genus, Eikenera (Eikenella) bacteria belonging to the genus Clostridium (Clostridium) bacteria, Staphylococcus (Staphylococcus) bacteria belonging to the genus Lactobacillus (Lactobacillus) bacteria belonging to the genus Actinobacillus (Actinobacillus) bacteria belonging to the genus Actinomyces (Actinomyces) bacteria belonging to the genus Bacteroides (Bacteroides) bacteria belonging to the genus, Cap Roh site file moth (Capnocytophaga) bacteria belonging to the genus Klebsiella (Klebsiella) bacteria belonging to the genus, Harobachirusu (Halobacillus) bacteria, Fusobacterium (Fusobacterium) bacteria belonging to the genus Erwinia (Erwinia) bacteria belonging to the genus, Erubenera (Elbenella) bacteria belonging to the genus Lactobacillus (Lactobacillus) bacteria belonging to the genus Listeria (Listeria) bacteria belonging to the genus Mannheimia (Mannheimia) bacteria belonging to the genus, Peputokokkasu (Peptococcus) bacteria belonging to the genus Prevotella (Prevotella) bacteria belonging to the genus, Proteus (Proteus) bacteria belonging to the genus, Serachi Examples include bacteria of the genus Serratia and bacteria of the genus Veillonella. More specifically, Vibrio harveyi (Vibrio harveyi), Vibrio fischeri (Vibrio fischeri), cholera (Vibrio cholerae), Vibrio parahaemolyticus (Vibrio parahaemolyticus), Vibrio Aruginorichikasu (Vibrio alginolyticus), Pseudomonas Hosuhoreumu (Pseudomonas phosphoreum ), poly Philo Sphingomonas gingivalis (Porphyromonas gingivalis), Yersinia enterocolitica (Yersinia enterocolitica), E. (Escherichia coli), Salmonella typhimurium (Salmonella typhimurium), Haemophilus influenzae (Haemophilus influenzae), Helicobacter pylori (Helicobacter pylori), Bacillus subtilis (Bacillus subtilis), Borrelia burgdorferi (Borrelia burgfdorferi), meningococcal (Neisseria meningitidis), Neisseria gonorrhoeae (Neisseria gonorrhoeae), Yersinia pestis (Yersinia pestis), Campylobacter Jeji Two (Campylobacter jejuni), Day Roh Cox radiodurans (Deinococcus radiodurans), Mycobacterium tuberculosis (Mycobacterium tuberculosis), Enterococcus faecalis (Enterococcus faecalis), Streptococcus pneumoniae (Streptococcus pneumoniae), Streptococcus pyogenes (Streptococcus pyogenes), Streptococcus mu chest (Streptococcus mutans), Staphylococcus aureus (Staphylococcus aureus), Mita Shigella (Shigella flexneri), Shigella Boidei (Shigella boydii), Bacillus cereus (Bacillus cereus), Bacillus Kubuchirisu (Bacillus cubtilis), Aeromonas hydrophila ( Aeromonas hydrophila), Salmonella typhi (Salmonella enterica), Eikenera-Korodensu (Eikenella corrodens), Helicobacter Hepatikasu (Helicobacter hepaticus), Clostridium perfringens (Clostridium perfringens), staphylococcal · Haemoritikasu (Staphylococcus haemolyticus), Lactobacillus gasseri (Lactobacillus gasseri), Lactobacillus acidophilus (Lactobacillus acidophilus), Lactobacillus reuteri (Lactobacillus reuteri), Lactobacillus salivarius (Lactobacillus salivarius), Lactobacillus casei (Lactobacillus casei) , Streptococcus Sanginisu (Streptococcus sanguinis), Streptococcus anginosus (Streptococcus anginosus), Streptococcus oralis (Streptococcus oralis), Streptococcus bovis (Streptococcus bovis), Streptococcus Gorudoni (Streptococcus gordonii), Streptococcus mitis (Streptococcus mitis), actinolite Bacillus actinomycetemcomitans (Actinobacillus actinomycetemcomitans), Vibrio Vulnificus (Vivrio vulnificus), Vibrio Mimikusu (Vibrio mimicus), Vibrio Anguirarumu (Vibrio anguillarum), Lactobacillus rhamnosus (Lactobacillus rhamnosus), Erwinia Amirobora (Erwinia amylovora), Erwinia Karotobara (Erwinia carotovara), Harobachirusu-halophilus (Halabacilus halophilus), Serratia Pimuchika (Serratia pymuthica), Serratia marcescens (Serratia marcescens), Bacteroides fragilis (Bacteroides fragilis), Bacteroides vulgatus (Bacteroides vulgatus), Bacteroides Disutasonisu (Bacteroides distasonis), Listeria monocytogenes ( Listeria monocytogenes ), Staphylococcus epidermidis , Clostridium difficile ( Clo stridium difficile), Aeromonas hydrophila Philia (Aeromonas hydrophilia), Mannheimia Haemoraitika (Mannhemia haemolytica), Klebsiella pneumoniae (Klebsiella pneumoniae), Bacillus anthracis (Bacillus anthracis), Campylobacter coli (Campylobacter coli), Campylobacter rectus (Campylobacter rectus), Proteus mirabilis (Proteus mirabilis), Actinomyces Naesurandi (Actinomyces naeslundii), Peputokokkasu-Anaerobiusu (Peptococcus anaerobius), Fusobacterium nucleatum (Fusobacterium nucleatum), Beironera-Parla (Veillonella parvula), Cap Roh site file like moth-Suputigena (Capnocytophaga sputigena) and Prevotella inter media (Prevotella intermedia).
本発明のAI−2阻害剤の有効成分は、ストレプトコッカス・ミュータンス、ポリフィロモナス・ジンジバリス、ストレプトコッカス・オラリス、ストレプトコッカス・ゴルドニ、ストレプトコッカス・サングイニス、ストレプトコッカス・ミティス、アクチノマイセス・ナエスランディ、ペプトコッカス・アナエロビウス、アクチノバチルス・アクチノマイセテムコミタンス、フゾバクテリウム・ヌクレアタム、ベイロネラ・パルラ、カプノサイトファガ・スプティゲナ、プレボテラ・インタメディア及びラクトバチルス・サリバリウスなどに対するAI−2の阻害に対し、特に好ましく用いられる。 The active ingredients of the AI-2 inhibitor of the present invention include Streptococcus mutans, Polyphyromonas gingivalis, Streptococcus oralis, Streptococcus gordonii, Streptococcus sanguinis, Streptococcus mitis, Actinomyces naeslandi, Peptococcus anaerodia In particular, it is preferably used for the inhibition of AI-2 against Actinobacillus actinomycetemcomitans, Fusobacterium nucleatum, Beironella parla, Capnocytofaga sputigena, Prevotella intermedia, Lactobacillus salivaius and the like.
生体内において、AI−2量とある種の感染症の症状とが相関関係を有し、本発明のAI−2阻害剤の有効成分を投与することによりAI−2と関連する感染症の症状を低減できる。したがって、本発明のAI−2阻害剤は、AI−2と関連する感染症の予防及び/又は治療剤として用いることができる。さらには、本発明のAI−2阻害剤は、AI−2と関連する感染症の予防及び/又は治療剤などに含有させることができる。 In vivo, the amount of AI-2 is correlated with the symptoms of certain infectious diseases, and the symptoms of infectious diseases associated with AI-2 by administering the active ingredient of the AI-2 inhibitor of the present invention Can be reduced. Therefore, the AI-2 inhibitor of the present invention can be used as a preventive and / or therapeutic agent for infectious diseases associated with AI-2. Furthermore, the AI-2 inhibitor of the present invention can be contained in an agent for preventing and / or treating infectious diseases associated with AI-2.
本発明のAI−2阻害剤の有効成分を投与することにより予防及び/又は治療することができる感染症は、AI−2を阻害することにより予防及び/又は治療することができる感染症であり、換言すれば、AI−2を利用するクオラムセンシングシステムを有する細菌、具体的にはAI−2を阻害することにより影響を及ぼすことができる上記のような細菌に関連する感染症である。 The infectious disease that can be prevented and / or treated by administering the active ingredient of the AI-2 inhibitor of the present invention is an infectious disease that can be prevented and / or treated by inhibiting AI-2. In other words, it is a bacterium having a quorum sensing system utilizing AI-2, specifically an infectious disease related to the above-mentioned bacterium that can be affected by inhibiting AI-2.
前記有効成分を投与することにより予防及び/又は治療することができる感染症の具体例として、口腔、皮膚、膣、消化(GI)管、食道及び気道等における感染症が挙げられる。より具体的には、ストレプトコッカス・ミュータンス等により引き起こされる齲蝕病;ポルフィロモナス・ジンジバリス等により引き起こされる歯肉炎、歯骨炎等の歯周病;日和見生物により引き起こされる日和見感染症;肺炎レンサ球菌及びインフルエンザ菌等により引き起こされる急性中耳炎(AOM)及び滲出性中耳炎(OME);インフルエンザ菌により引き起こされるインフルエンザ;ヘリコバクター・ピロリにより引き起こされる十二指腸潰瘍、胃ガン及び胃潰瘍;コレラ菌により引き起こされるコレラ;ペスト菌により引き起こされるペスト;髄膜炎菌により引き起こされる髄膜炎;ネズミチフス菌などのサルモネラ属細菌により引き起こされるサルモネラ中毒;ウェルシュ菌により引き起こされる食中毒、ガス壊疽及び出血性腸炎;及び大腸菌等により引き起こされる下痢症などが挙げられる(後述の実施例、並びにYoshida A.et al.,Appl.Environ.Microbiol.,71(5),p.2372-2380,2005;Wen Z.T.et al.,J.Bacteriol.,189(9),p.2682-2691,2004;Osaki T. et al.,J.Med.Microbiol.,55(Pt11),p.1477-1485,2006;及びOhtani K.et al.,Mol.Microbiol.,44(1),p.171-179,2002等参照)。 Specific examples of infectious diseases that can be prevented and / or treated by administering the active ingredient include infectious diseases in the oral cavity, skin, vagina, digestive (GI) tract, esophagus and respiratory tract. More specifically, caries caused by Streptococcus mutans, etc .; periodontal diseases such as gingivitis and gingivitis caused by Porphyromonas gingivalis, etc .; opportunistic infections caused by opportunistic organisms; Streptococcus pneumoniae Acute otitis media (AOM) and exudative otitis media (OME) caused by Haemophilus influenzae, etc .; influenza caused by Haemophilus influenzae; duodenal ulcer, gastric cancer and gastric ulcer caused by Helicobacter pylori; cholera caused by Vibrio cholerae; Plague caused by Neisseria meningitidis; Salmonella poisoning caused by Salmonella bacteria such as Salmonella typhimurium; Food poisoning, gas gangrene and bleeding caused by Clostridium perfringens Enteritis; and diarrhea caused by Escherichia coli and the like (Examples described later and Yoshida A. et al., Appl. Environ. Microbiol., 71 (5), p. 2372-2380, 2005; Wen Z T. et al., J. Bacteriol., 189 (9), p.2682-2691, 2004; Osaki T. et al., J. Med.Microbiol., 55 (Pt11), p.1477-1485, 2006; and Ohtani K. et al., Mol. Microbiol., 44 (1), p. 171-179, 2002, etc.).
本明細書において感染症の予防には、感染症の発症を抑えること及び遅延させることが含まれ、感染症になる前の予防だけではなく、治療後の感染症の再発に対する予防も含まれる。本明細書において感染症の治療には、感染症を治癒すること、症状を改善すること及び症状の進行を抑えることが包含される。 In the present specification, prevention of infectious diseases includes suppressing and delaying the onset of infectious diseases, and includes not only prevention before infectious diseases but also prevention of recurrence of infectious diseases after treatment. In the present specification, treatment of an infectious disease includes curing an infectious disease, ameliorating symptoms, and suppressing progression of symptoms.
本発明のAI−2阻害剤の投与対象は、好ましくは哺乳動物である。本明細書において哺乳動物は、温血脊椎動物をさし、例えば、ヒト及びサルなどの霊長類、マウス、ラット及びウサギなどの齧歯類、イヌ及びネコなどの愛玩動物、並びにウシ、ウマ及びブタなどの家畜が挙げられる。本発明のAI−2阻害剤は、霊長類、特にヒトへの投与に好適である。感染症に罹患しているヒト、感染症と診断されているヒト、感染症に罹患する可能性があるヒト、感染症を予防する必要があるヒトに投与することが特に好ましい。 The subject of administration of the AI-2 inhibitor of the present invention is preferably a mammal. As used herein, mammals refer to warm-blooded vertebrates, such as primates such as humans and monkeys, rodents such as mice, rats and rabbits, companion animals such as dogs and cats, and cattle, horses and Examples include livestock such as pigs. The AI-2 inhibitors of the present invention are suitable for administration to primates, particularly humans. It is particularly preferred to administer to a human suffering from an infectious disease, a human being diagnosed with an infectious disease, a human being likely to suffer from an infectious disease, or a human in need of preventing the infectious disease.
本発明のAI−2阻害剤、並びに前記感染症の予防及び/又は治療剤の形態は特に制限されないが、例えば、医薬組成物、食品組成物、口腔用組成物若しくは化粧料組成物とするか、又はこれらに含有させることができる。 The form of the AI-2 inhibitor of the present invention and the preventive and / or therapeutic agent for the infectious disease is not particularly limited. For example, is it a pharmaceutical composition, a food composition, an oral composition, or a cosmetic composition? Or can be contained in these.
医薬組成物を調製する場合は、通常、前記有効成分と好ましくは薬学的に許容される担体を含む製剤として調製する。薬学的に許容される担体とは、一般的に、前記有効成分とは反応しない、不活性の、無毒の、固体又は液体の、増量剤、希釈剤又はカプセル化材料等をいい、例えば、水、エタノール、ポリオール(例えば、グリセロール、プロピレングリコール、液体ポリエチレングリコールなど)、適切なそれらの混合物、植物性油などの溶媒又は分散媒体などが挙げられる。 When preparing a pharmaceutical composition, it is usually prepared as a preparation containing the active ingredient and preferably a pharmaceutically acceptable carrier. A pharmaceutically acceptable carrier generally refers to an inert, non-toxic, solid or liquid, bulking agent, diluent or encapsulating material that does not react with the active ingredient, eg, water. , Ethanol, polyol (eg, glycerol, propylene glycol, liquid polyethylene glycol, etc.), suitable mixtures thereof, solvents or dispersion media such as vegetable oils, and the like.
医薬組成物は、経口により、非経口により、例えば、皮膚に、皮下に、粘膜に、静脈内に、動脈内に、筋肉内に、腹腔内に、膣内に、肺に、脳内に、眼に、及び鼻腔内に投与される。経口投与製剤としては、錠剤、顆粒剤、細粒剤、散剤、カプセル剤、チュアブル剤、ペレット剤、シロップ剤、液剤、懸濁剤及び吸入剤などが挙げられる。非経口投与製剤としては、坐剤、保持型浣腸剤、点滴剤、点眼剤、点鼻剤、ペッサリー剤、注射剤、口腔洗浄剤並びに軟膏、クリーム剤、ゲル剤、制御放出パッチ剤及び貼付剤などの皮膚外用剤などが挙げられる。本発明の医薬組成物は、徐放性皮下インプラントの形態で、又は標的送達系(例えば、モノクローナル抗体、ベクター送達、イオン注入、ポリマーマトリックス、リポソーム及びミクロスフェア)の形態で、非経口で投与してもよい。 The pharmaceutical composition can be administered orally, parenterally, e.g., into the skin, subcutaneously, mucosal, intravenously, intraarterially, intramuscularly, intraperitoneally, intravaginally, into the lungs, into the brain, Administered to the eye and intranasally. Examples of the preparation for oral administration include tablets, granules, fine granules, powders, capsules, chewables, pellets, syrups, solutions, suspensions and inhalants. As parenteral preparations, suppositories, retention enemas, drops, eye drops, nasal drops, pessaries, injections, mouth washes, ointments, creams, gels, controlled release patches and patches Skin external preparations, and the like. The pharmaceutical compositions of the invention are administered parenterally in the form of sustained-release subcutaneous implants or in the form of targeted delivery systems (eg, monoclonal antibodies, vector delivery, ion implantation, polymer matrices, liposomes and microspheres). May be.
医薬組成物はさらに医薬分野において慣用の添加剤を含んでいてもよい。そのような添加剤には、例えば、賦形剤、結合剤、崩壊剤、滑沢剤、抗酸化剤、着色剤、矯味剤などがあり、必要に応じて使用できる。長時間作用できるように徐放化するためには、既知の遅延剤等でコーティングすることもできる。賦形剤としては、例えば、カルボキシメチルセルロースナトリウム、寒天、軽質無水ケイ酸、ゼラチン、結晶セルロース、ソルビトール、タルク、デキストリン、デンプン、乳糖、白糖、ブドウ糖、マンニトール、メタ珪酸アルミン酸マグネシウム、リン酸水素カルシウム等が使用できる。結合剤としては、例えば、アラビアゴム、アルギン酸ナトリウム、エタノール、エチルセルロース、カゼインナトリウム、カルボキシメチルセルロースナトリウム、寒天、精製水、ゼラチン、デンプン、トラガント、乳糖、ヒドロキシセルロース、ヒドロキシメチルセルロース、ヒドロキシプロピルセルロース、ポリビニルピロリドン等が挙げられる。崩壊剤としては、例えば、カルボキシメチルセルロース、カルボキシメチルセルロースナトリウム、カルボキシメチルセルロースカルシウム、結晶セルロース、デンプン、ヒドロキシプロピルスターチ等が挙げられる。滑沢剤としては、例えば、ステアリン酸、ステアリン酸カルシウム、ステアリン酸マグネシウム、タルク、硬化油、ショ糖脂肪酸エステル、ロウ類等が挙げられる。抗酸化剤としては、トコフェロール、没食子酸エステル、ジブチルヒドロキシトルエン(BHT)、ブチルヒドロキシアニソール(BHA)、アスコルビン酸等が挙げられる。必要に応じてその他の添加剤や薬剤、例えば制酸剤(炭酸水素ナトリウム、炭酸マグネシウム、沈降炭酸カルシウム、合成ヒドロタルサイト等)、胃粘膜保護剤(合成ケイ酸アルミニウム、スクラルファート、銅クロロフィリンナトリウム等)を加えてもよい。 The pharmaceutical composition may further contain additives conventionally used in the pharmaceutical field. Such additives include, for example, excipients, binders, disintegrants, lubricants, antioxidants, colorants, flavoring agents, and the like, and can be used as necessary. In order to achieve sustained release so that it can act for a long time, it can also be coated with a known retarder or the like. Examples of excipients include sodium carboxymethylcellulose, agar, light anhydrous silicic acid, gelatin, crystalline cellulose, sorbitol, talc, dextrin, starch, lactose, sucrose, glucose, mannitol, magnesium aluminate metasilicate, calcium hydrogen phosphate Etc. can be used. Examples of the binder include gum arabic, sodium alginate, ethanol, ethyl cellulose, sodium caseinate, sodium carboxymethyl cellulose, agar, purified water, gelatin, starch, tragacanth, lactose, hydroxycellulose, hydroxymethylcellulose, hydroxypropylcellulose, polyvinylpyrrolidone, etc. Is mentioned. Examples of the disintegrant include carboxymethyl cellulose, carboxymethyl cellulose sodium, carboxymethyl cellulose calcium, crystalline cellulose, starch, hydroxypropyl starch and the like. Examples of the lubricant include stearic acid, calcium stearate, magnesium stearate, talc, hydrogenated oil, sucrose fatty acid ester, waxes and the like. Examples of the antioxidant include tocopherol, gallic acid ester, dibutylhydroxytoluene (BHT), butylhydroxyanisole (BHA), ascorbic acid and the like. Other additives and drugs as required, such as antacids (sodium bicarbonate, magnesium carbonate, precipitated calcium carbonate, synthetic hydrotalcite, etc.), gastric mucosa protective agents (synthetic aluminum silicate, sucralfate, copper chlorophyllin sodium, etc.) ) May be added.
口腔用組成物には、前記有効成分のほか、その形態に応じて種々の成分を配合することができる。配合可能な成分として、例えば研磨剤、湿潤剤、粘結剤、歯質強化剤、殺菌剤、pH調整剤、酵素類、抗炎症剤・血行促進剤、甘味剤、防腐剤、着色剤・色素類、香料等を適宜使用することができる。
口腔用組成物に配合することができる成分としては、具体的に、第2リン酸カルシウム、第3リン酸カルシウム、ピロリン酸カルシウム、リン酸マグネシウム、不溶性メタリン酸ナトリウム、無水ケイ酸、水酸化アルミニウム、アルミナ、ハイドロキシアパタイト、炭酸カルシウム、炭酸マグネシウム、硫酸カルシウム、ゼオライト、合成アルミノケイ酸塩、ベンガラ等の研磨剤;前記の研磨剤を結合剤を用いて造粒した顆粒状研磨剤;グリセリン、プロピレングリコール、1,3−ブチレングリコール、エチレングリコール、ポリエチレングリコール、ポリプロピレングリコール、エリスリトール、キシリトール、ソルビトール、マルチトール等の湿潤剤;カルボキシメチルセルロース及びその塩類、メチルセルロース、ヒドロキシエチルセルロース、カラギーナン、ポリアクリル酸ナトリウム、ヒドロキシプロピルセルロース、カルボキシメチルヒドロキシエチルセルロースナトリウム、アルギン酸ナトリウム、アルギン酸プロピレングリコールエステル、キサンタンガム、トラガカントガム、カラヤガム、アラビヤガム、ポリビニルアルコール、ポリビニルピロリドン、ビーガム、ラポナイト等の粘結剤;モノフルオルリン酸ナトリウム、フッ化スズ、フッ化ナトリウム等の歯質強化剤;クロルヘキシジン及びその塩類、トリクロサン、塩化セチルピリジニウム、チモール類、塩化ベンザルコニウム等の殺菌剤;リン酸ナトリウム等のpH調整剤;デキストラナーゼ、アミラーゼ、プロテアーゼ、リゾチーム、ムタナーゼ等の酵素類;塩化ナトリウム、ヒノキチオール、ε−アミノカプロン酸、トラネキサム酸、アラントイン類、トコフェロール類、オクチルフタリド、ニコチン酸エステル類、ジヒドロコレステロール、グリチルレチン酸、グリチルリチン酸及びその塩類、グリセロホスフェート、クロロフィル、水溶性無機リン酸化合物、アズレン類、カミツレ、センブリ、当帰、センキュウ、生薬類等の抗炎症剤・血行促進剤;サッカリンナトリウム、ステビオサイド、タウマチン、アスパラチルフェニルアラニンメチルエステル等の甘味剤;p−ヒドロキシ安息香酸、p−ヒドロキシ安息香酸エチル、p−ヒドロキシ安息香酸プロピル、p−ヒドロキシ安息香酸ブチル、安息香酸ナトリウム等の防腐剤;二酸化チタン等の着色剤・色素類;ペパーミント油、スペアミント油、メントール、カルボン、アネトール、オイゲノール、サリチル酸メチル、リモネン、オシメン、n−デシルアルコール、シトロネロール、α−テルピネオール、メチルアセテート、シトロネリルアセテート、メチルオイゲノール、シネオール、リナロール、エチルリナロール、ワニリン、チモール、アニス油、レモン油、オレンジ油、セージ油、ローズマリー油、桂皮油、ピメント油、桂葉油、冬緑油、丁子油、ユーカリ油等の香料等が挙げられる。
In addition to the active ingredient, various components can be blended in the oral composition depending on the form. Ingredients that can be incorporated include, for example, abrasives, wetting agents, binders, dentin enhancers, bactericides, pH adjusters, enzymes, anti-inflammatory agents / blood circulation promoters, sweeteners, preservatives, colorants / pigments , Fragrances and the like can be used as appropriate.
Specific components that can be blended in the oral composition include dicalcium phosphate, tricalcium phosphate, calcium pyrophosphate, magnesium phosphate, insoluble sodium metaphosphate, anhydrous silicic acid, aluminum hydroxide, alumina, hydroxyapatite Abrasives such as calcium carbonate, magnesium carbonate, calcium sulfate, zeolite, synthetic aluminosilicate, bengara, etc .; granular abrasives granulated from the above abrasives using a binder; glycerin, propylene glycol, 1,3- Wetting agents such as butylene glycol, ethylene glycol, polyethylene glycol, polypropylene glycol, erythritol, xylitol, sorbitol, maltitol; carboxymethylcellulose and its salts, methylcellulose, hydroxyethyl Binders such as roulose, carrageenan, sodium polyacrylate, hydroxypropylcellulose, sodium carboxymethylhydroxyethylcellulose, sodium alginate, propylene glycol alginate, xanthan gum, tragacanth gum, karaya gum, arabic gum, polyvinyl alcohol, polyvinyl pyrrolidone, bee gum, laponite; Dental strengthening agents such as sodium monofluorophosphate, tin fluoride, sodium fluoride; bactericides such as chlorhexidine and its salts, triclosan, cetylpyridinium chloride, thymols, benzalkonium chloride; pH of sodium phosphate, etc. Modifier: Enzymes such as dextranase, amylase, protease, lysozyme, mutanase; sodium chloride, hinokitiol, ε-a Minocaproic acid, tranexamic acid, allantoins, tocopherols, octylphthalide, nicotinic acid esters, dihydrocholesterol, glycyrrhetinic acid, glycyrrhizic acid and its salts, glycerophosphate, chlorophyll, water-soluble inorganic phosphate compounds, azulenes, camomile, Anti-inflammatory agents / blood circulation promoters such as assembly, Toki, Senkyu, herbal medicines; sweeteners such as saccharin sodium, stevioside, thaumatin, aspartylphenylalanine methyl ester; p-hydroxybenzoic acid, ethyl p-hydroxybenzoate, p- Preservatives such as propyl hydroxybenzoate, butyl p-hydroxybenzoate and sodium benzoate; colorants and pigments such as titanium dioxide; peppermint oil, spearmint oil, menthol, carvone, anethole Eugenol, methyl salicylate, limonene, ocimene, n-decyl alcohol, citronellol, α-terpineol, methyl acetate, citronellyl acetate, methyl eugenol, cineol, linalool, ethyl linalool, crocodile, thymol, anise oil, lemon oil, orange oil, Examples include sage oil, rosemary oil, cinnamon oil, pimento oil, cinnamon oil, winter green oil, clove oil, eucalyptus oil, and the like.
口腔用組成物には、本発明の効果を損なわない限り、界面活性剤を配合することもできる。界面活性剤としては特に制限はないが、アニオン系界面活性剤及びノニオン系界面活性剤を好ましく用いることができる。アニオン系界面活性剤としては、ラウリル硫酸ナトリウム、ミリスチル硫酸ナトリウム等のアルキル硫酸エステル塩;ラウロイルサルコシンナトリウム等のN−アシルアミノ酸塩;ラウロイルメチルタウリンナトリウム等のアシルタウリン塩;ヤシ油脂肪酸エチルエステルスルホン酸ナトリウム塩等の脂肪酸エステルスルホン酸塩等が挙げられる。ノニオン系界面活性剤としては、ポリオキシエチレン硬化ヒマシ油、ショ糖脂肪酸エステル、ソルビタン脂肪酸エステル、グリセリン脂肪酸エステル、ポリグリセリン脂肪酸エステル、ポリオキシエチレンソルビタン脂肪酸エステル、ポリオキシエチレンソルビット脂肪酸エステル、ポリオキシエチレングリセリン脂肪酸エステル、ポリエチレングリコール脂肪酸エステル等の脂肪酸エステル類、ポリオキシエチレンフィトステロール、ポリオキシエチレンフィトスタノール、ポリオキシエチレンラノリン、ポリオキシエチレンラノリンアルコール、ポリオキシエチレンアルキルアミン、ポリオキシエチレン脂肪酸アミド、ポリオキシエチレンアルキルフェニルホルムアルデヒド縮合物、ポリオキシエチレンアルキルエーテル、ポリオキシエチレンポリオキシプロピレンアルキルエーテル、ポリオキシエチレンポリオキシプロピレン共重合体、ポリオキシエチレンアルキルフェニルエーテル、ポリオキシエチレン脂肪酸エタノールアミドなどが挙げられる。 As long as the effects of the present invention are not impaired, a surfactant may be added to the oral composition. Although there is no restriction | limiting in particular as surfactant, Anionic surfactant and a nonionic surfactant can be used preferably. Examples of anionic surfactants include alkyl sulfate salts such as sodium lauryl sulfate and sodium myristyl sulfate; N-acyl amino acid salts such as sodium lauroyl sarcosine; acyl taurine salts such as sodium lauroyl methyl taurine; coconut oil fatty acid ethyl ester sulfonic acid Examples include fatty acid ester sulfonates such as sodium salts. Nonionic surfactants include polyoxyethylene hydrogenated castor oil, sucrose fatty acid ester, sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbite fatty acid ester, polyoxyethylene Fatty acid esters such as glycerin fatty acid ester and polyethylene glycol fatty acid ester, polyoxyethylene phytosterol, polyoxyethylene phytostanol, polyoxyethylene lanolin, polyoxyethylene lanolin alcohol, polyoxyethylene alkylamine, polyoxyethylene fatty acid amide, polyoxy Ethylene alkyl phenyl formaldehyde condensate, polyoxyethylene alkyl ether, polyoxye Ren polyoxypropylene alkyl ethers, polyoxyethylene polyoxypropylene copolymers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene fatty acid ethanol amides.
口腔用組成物は、前記有効成分を配合し、常法により製造することができる。口腔用組成物の形態は特に制限されず、粉歯磨、液状歯磨、練歯磨、潤製歯磨、口腔パスタ等のペースト状洗浄剤、洗口液、マウスウォッシュ等の液状洗浄剤、うがい用錠剤、歯肉マッサージクリーム、チューインガム、トローチ、キャンディ等の食品等の形態とすることができる。 The composition for oral cavity can be manufactured by a conventional method by blending the active ingredients. The form of the composition for oral cavity is not particularly limited, and is a powdery toothpaste, a liquid toothpaste, a toothpaste, a toothpaste, a paste-like cleaning agent such as oral pasta, a mouthwash, a liquid cleaning agent such as mouthwash, a gargle tablet, It can be in the form of food such as gingival massage cream, chewing gum, troche and candy.
食品組成物を調製する場合、その形態は特に制限されず、飲料も包含される。一般食品の他に、感染症(具体的には歯骨炎などの歯周病等)の予防・改善等をコンセプトとしてその旨を表示した飲食品、すなわち、健康食品、機能性食品、病者用食品及び特定保健用食品なども包含される。健康食品、機能性食品、病者用食品及び特定保健用食品は、具体的には、細粒剤、錠剤、顆粒剤、散剤、カプセル剤、シロップ剤、液剤、流動食等の各種製剤形態として使用することができ、これら製剤のために使用することができる。製剤形態の食品組成物は、医薬製剤と同様に製造することができ、前記有効成分と、食品として許容できる担体、例えば適当な賦形剤(例えば、でん粉、加工でん粉、乳糖、ブドウ糖、水等)等とを混合した後、慣用の手段を用いて製造することができる。さらに、食品組成物は、スープ類、ジュース類、乳飲料、茶飲料、コーヒー飲料、ココア飲料、ゼリー状飲料などの液状食品組成物、プリン、ヨーグルトなどの半固形食品組成物、パン類、うどんなどの麺類、クッキー、チョコレート、キャンディ、ガム、せんべいなどの菓子類、ふりかけ、バター、ジャムなどのスプレッド類等の形態もとりうる。また、食品には、飼料も含まれる。 When preparing a food composition, the form in particular is not restrict | limited, A drink is also included. In addition to general foods, foods and drinks that indicate the concept of prevention / improvement of infectious diseases (specifically periodontal diseases such as gingivitis), that is, health foods, functional foods, sick people Foods for specified use and foods for specified health use are also included. Health foods, functional foods, foods for patients and foods for specified health use are specifically formulated in various forms such as fine granules, tablets, granules, powders, capsules, syrups, liquids, and liquid foods. Can be used for these formulations. A food composition in the form of a preparation can be produced in the same manner as a pharmaceutical preparation. The active ingredient and a carrier acceptable as a food, for example, an appropriate excipient (eg, starch, processed starch, lactose, glucose, water, etc.) ) And the like, and then can be produced using conventional means. In addition, food compositions include soups, juices, milk beverages, tea beverages, coffee beverages, cocoa beverages, jelly-like beverages and other liquid food compositions, pudding, yogurt and other semi-solid food compositions, breads, udon Such as noodles such as cookies, chocolate, candy, gum, rice crackers and the like, spreads such as sprinkles, butter, jam and the like. The food also includes feed.
食品組成物には、種々の食品添加物、例えば、酸化防止剤、香料、各種エステル類、有機酸類、有機酸塩類、無機酸類、無機酸塩類、無機塩類、色素類、乳化剤、保存料、調味料、甘味料、酸味料、果汁エキス類、野菜エキス類、花蜜エキス類、pH調整剤、品質安定剤などの添加剤を単独、あるいは併用して配合してもよい。 Food compositions include various food additives such as antioxidants, fragrances, various esters, organic acids, organic acid salts, inorganic acids, inorganic acid salts, inorganic salts, pigments, emulsifiers, preservatives, seasonings Additives such as additives, sweeteners, acidulants, fruit juice extracts, vegetable extracts, nectar extracts, pH adjusters, and quality stabilizers may be used alone or in combination.
化粧料組成物を調製する場合、その形態は特に制限されず、溶液、乳液、粉末、水−油二層系、水−油−粉末三層系、ゲル、エアゾール、ミスト及びカプセル等任意の形態とすることができる。また、化粧料組成物の製品形態も任意であり、例えば、マッサージ剤及びフットスプレー等のボディー化粧料、化粧水、乳液、クリーム及びパック等のフェーシャル化粧料、ファンデーション、おしろい、頬紅、口紅、アイシャドー、アイライナー、マスカラ及びサンスクリーン等のメーキャップ化粧料、メーク落とし、洗顔料及びボディーシャンプー等の皮膚洗浄料、ヘアーリンス及びシャンプー等の毛髪化粧料、浴用剤、軟膏、医薬部外品、あぶら取り紙、芳香化粧料等が挙げられる。 When preparing a cosmetic composition, the form is not particularly limited, and any form such as a solution, emulsion, powder, water-oil two-layer system, water-oil-powder three-layer system, gel, aerosol, mist, capsule, etc. It can be. The product form of the cosmetic composition is also arbitrary, for example, body cosmetics such as massage agents and foot sprays, facial cosmetics such as lotions, emulsions, creams and packs, foundations, funny, blushers, lipsticks, eye Makeup cosmetics such as shadows, eyeliners, mascaras and sunscreens, makeup removers, skin cleansers such as face wash and body shampoo, hair cosmetics such as hair rinses and shampoos, bath preparations, ointments, quasi drugs, oil Examples include papers and aromatic cosmetics.
化粧料組成物は、化粧品、医薬部外品及び医薬品等に慣用される他の成分、例えば、粉末成分、液体油脂、固体油脂、ロウ、炭化水素、高級脂肪酸、高級アルコール、エステル、シリコーン、アニオン界面活性剤、カチオン界面活性剤、両性界面活性剤、非イオン界面活性剤、保湿剤、水溶性高分子、増粘剤、皮膜剤、紫外線吸収剤、金属イオン封鎖剤、低級アルコール、多価アルコール、糖、アミノ酸、有機アミン、高分子エマルジョン、pH調整剤、皮膚栄養剤、ビタミン、酸化防止剤、酸化防止助剤、香料、水等を必要に応じて配合し、常法により製造することができる。 The cosmetic composition includes other components commonly used in cosmetics, quasi drugs and pharmaceuticals, such as powder components, liquid fats and oils, solid fats and oils, waxes, hydrocarbons, higher fatty acids, higher alcohols, esters, silicones, anions. Surfactant, cationic surfactant, amphoteric surfactant, nonionic surfactant, humectant, water-soluble polymer, thickener, film agent, UV absorber, sequestering agent, lower alcohol, polyhydric alcohol , Sugar, amino acids, organic amines, polymer emulsions, pH adjusters, skin nutrients, vitamins, antioxidants, antioxidant auxiliaries, fragrances, water, etc. may be blended as necessary and manufactured by conventional methods. it can.
その他の化粧料組成物に配合可能な成分としては、例えば、防腐剤(エチルパラベン、ブチルパラベン等)、消炎剤(例えば、グリチルリチン酸誘導体、グリチルレチン酸誘導体、サリチル酸誘導体、ヒノキチオール、酸化亜鉛、アラントイン等)、美白剤(例えば、胎盤抽出物、ユキノシタ抽出物、アルブチン等)、各種抽出物(例えば、オウバク、オウレン、シコン、シャクヤク、センブリ、バーチ、セージ、ビワ、ニンジン、アロエ、ゼニアオイ、アイリス、ブドウ、ヨクイニン、ヘチマ、ユリ、サフラン、センキュウ、ショウキュウ、オトギリソウ、オノニス、ニンニク、トウガラシ、チンピ、トウキ、海藻等)、賦活剤(例えば、ローヤルゼリー、感光素、コレステロール誘導体等)、血行促進剤(例えば、ノニル酸ワレニルアミド、ニコチン酸ベンジルエステル、ニコチン酸β−ブトキシエチルエステル、カプサイシン、ジンゲロン、カンタリスチンキ、イクタモール、タンニン酸、α−ボルネオール、ニコチン酸トコフェロール、イノシトールヘキサニコチネート、シクランデレート、シンナリジン、トラゾリン、アセチルコリン、ベラパミル、セファランチン、γ−オリザノール等)、抗脂漏剤(例えば、硫黄、チアントール等)、抗炎症剤(例えば、トラネキサム酸、チオタウリン、ヒポタウリン等)等が挙げられる。 Examples of other components that can be incorporated into the cosmetic composition include preservatives (ethyl paraben, butyl paraben, etc.), anti-inflammatory agents (eg, glycyrrhizic acid derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc. ), Whitening agents (for example, placenta extract, saxifrage extract, arbutin, etc.), various extracts (for example, buckwheat, auren, shikon, peonies, assembly, birch, sage, loquat, carrot, aloe, mallow, iris, grape , Yokuinin, Loofah, Lily, Saffron, Senkyu, Pepper, Hypericum, Onionis, Garlic, Pepper, Chimpi, Toki, Seaweed, etc.), Activator (for example, Royal Jelly, Photosensitizer, Cholesterol Derivative, etc.), Blood circulation promoter (for example, , Wallenylami nonylate Nicotinic acid benzyl ester, nicotinic acid β-butoxyethyl ester, capsaicin, zingerone, cantalis tincture, ictamol, tannic acid, α-borneol, nicotinic tocopherol, inositol hexanicotinate, cyclandrate, cinnarizine, trazoline, acetylcholine, And verapamil, cephalanthin, γ-oryzanol, etc.), antiseborrheic agents (eg, sulfur, thianthol, etc.), anti-inflammatory agents (eg, tranexamic acid, thiotaurine, hypotaurine, etc.).
本発明のAI−2阻害剤における前記有効成分の投与量は、AI−2を阻害しうる量であればよく、投与方法、年齢、症状等により適宜決定することができる。例えば、前記有効成分の質量に基づき、1日あたり、体重1kgあたり、経口投与で通常0.001〜100mg、好ましくは0.01〜10mgである。 The dose of the active ingredient in the AI-2 inhibitor of the present invention may be an amount that can inhibit AI-2, and can be appropriately determined depending on the administration method, age, symptoms, and the like. For example, based on the mass of the active ingredient, the daily dose is usually 0.001 to 100 mg, preferably 0.01 to 10 mg per kg body weight per day.
本発明のAI−2阻害剤における前記有効成分の含有量は、上記投与量を達成するように適宜決定できる。例えば、本発明のAI−2阻害剤において、前記有効成分の含有量は0.0001〜1質量%が好ましく、0.001〜0.05質量%がより好ましい。 The content of the active ingredient in the AI-2 inhibitor of the present invention can be appropriately determined so as to achieve the above dose. For example, in the AI-2 inhibitor of the present invention, the content of the active ingredient is preferably 0.0001 to 1% by mass, and more preferably 0.001 to 0.05% by mass.
前記有効成分を投与することにより、AI−2を阻害することができ、ひいては、感染症を予防及び/又は治療することができる。 By administering the active ingredient, AI-2 can be inhibited, and thus infection can be prevented and / or treated.
従来、感染症の予防及び治療には抗生物質の投与が行われてきた。しかし細菌が薬剤耐性を獲得するため、抗生物質の効果が減弱してしまう。一方、AI−2を阻害すれば、細菌が本来持つクオラムセンシングシステムを制御し、その病原性を制御することが可能となる。従って、本発明のAI−2阻害剤は、薬剤耐性を持っている細菌にも効果が期待できる。 Conventionally, antibiotics have been administered for the prevention and treatment of infectious diseases. However, since bacteria acquire drug resistance, the effectiveness of antibiotics is diminished. On the other hand, if AI-2 is inhibited, it becomes possible to control the quorum sensing system inherent in bacteria and control its pathogenicity. Therefore, the AI-2 inhibitor of the present invention can be expected to have an effect on bacteria having drug resistance.
以下、本発明を実施例に基づきさらに詳細に説明するが、本発明はこれに限定されるものではない。 EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited to this.
試験例1 AI−2活性の測定
AI−2バイオアッセイ系のためのレポーター菌株としてのビブリオ・ハーベイBB170株(ATCC BAA−1117)をMarine Agar 2216培地(商品名、Difco社製)で30℃、好気条件下で培養した。このように培養したビブリオ・ハーベイBB170株の一白金耳をMarine Broth 2216培地(商品名、Difco社製)に植菌し、好気条件下8時間、30℃、200rpmで振盪培養を行った。前記菌液200μLをAB(Autoinducer Bioassay)培地に植菌し、好気条件下16時間、30℃、200rpmで振盪培養を行った。この菌液をAB培地で5000倍に希釈し、レポーター菌液とした。
なお、AB培地は、Mol.Microbiol.,9(4),p.773-786,1993を参照して以下の通り調製した。0.2%Vitamin-free casamino acids(Difco社製)、0.3M NaCl(和光純薬社製)、0.05M MgSO4・7H2O(和光純薬社製)の溶液を任意の濃度のKOH溶液(和光純薬社製)でpH7.5に調整し、オートクレーブ後室温で保存した。この溶液1Lに対し、1Mリン酸カリウムバッファー(1M KH2PO4 21.1mL+1M K2HPO4 28.9mL)10mL、0.1M L−アルギニン(free-base、和光純薬社製)10mL、1mg/mL thiamine HCl(和光純薬社製)1mL、10μg/mL リボフラビン(和光純薬社製)1mL及びグリセロール(和光純薬社製)20mLをよく混和後、濾過滅菌したもの42mLを添加し、AB培地を調製した。
Test Example 1 Measurement of AI-2 Activity Vibrio Harvey BB170 strain (ATCC BAA-1117) as a reporter strain for the AI-2 bioassay system was obtained at 30 ° C. in a Marine Agar 2216 medium (trade name, manufactured by Difco). Cultured under aerobic conditions. One platinum loop of Vibrio Harvey BB170 strain cultured as described above was inoculated into Marine Broth 2216 medium (trade name, manufactured by Difco), and cultured with shaking at 30 ° C. and 200 rpm for 8 hours under aerobic conditions. 200 μL of the bacterial solution was inoculated on AB (Autoinducer Bioassay) medium, and cultured with shaking at 30 ° C. and 200 rpm for 16 hours under aerobic conditions. This bacterial solution was diluted 5000 times with AB medium to obtain a reporter bacterial solution.
Note that AB medium is obtained from Mol. Microbiol., 9 (4), p. Prepared as follows with reference to 773-786,1993. 0.2% Vitamin-free casamino acids (manufactured by Difco), 0.3M NaCl (manufactured by Wako Pure Chemical Industries, Ltd.), 0.05M MgSO 4 · 7H 2 O (manufactured by Wako Pure Chemical Industries, Ltd.) The pH was adjusted to 7.5 with Kojun Pure Chemicals, and the mixture was stored at room temperature after autoclaving. To 1 L of this solution, 1 M potassium phosphate buffer (1 M KH 2 PO 4 21.1 mL + 1 M K 2 HPO 4 28.9 mL) 10 mL, 0.1 M L-arginine (free-base, manufactured by Wako Pure Chemical Industries) 10 mL, 1 mg / ML thiamine HCl (manufactured by Wako Pure Chemical Industries) 1 mL, 10 μg / mL Riboflavin (manufactured by Wako Pure Chemical Industries) 1 mL and glycerol (manufactured by Wako Pure Chemical Industries, Ltd.) 20 mL are thoroughly mixed, and then 42 mL of sterile filtered material is added, A medium was prepared.
前記レポーター菌液に、終濃度が0.01%(w/v)又は0.001%(w/v)となるように炭素数4〜22の直鎖飽和脂肪酸(酪酸(SIGMA社より購入)、デカン酸(SIGMA社より購入)、ドデカン酸(SIGMA社より購入)、テトラデカン酸(ミリスチン酸、SIGMA社より購入)、ヘキサデカン酸(パルミチン酸、SIGMA社より購入)、オクタデカン酸(ステアリン酸、SIGMA社より購入)、ドコサン酸(ベヘン酸、SIGMA社より購入))のエタノール溶液(濃度:1%(w/v))を添加し、室温で10分プレインキュベートした。次いで、DPD(OMM Scientificに合成検討を依頼し、同社で合成したものを購入した)を終濃度が10μMとなるように添加し、30℃にて好気振盪培養を行った。4時間後の発光強度をケミルミネッセンス計(ベルトールド社製、Mitharas LB940(商品名))で測定し、AI−2阻害活性を測定した。なお、DPDが惹起する発光を完全に抑制するときのAI−2阻害活性を100とし、前記直鎖飽和脂肪酸を添加したときのAI−2阻害活性を相対値で示した。さらに、ポジティブコントロールとして、AI−2阻害化合物として既知化合物(4−ブロモ−5−(4−メトキシフェニル)−2(5H)−フラノン、Sigma社製)を用い、同様にAI−2阻害活性を測定した。
その結果を表1に示す。
In the reporter bacterial solution, linear saturated fatty acid having 4 to 22 carbon atoms (butyric acid (purchased from SIGMA) so that the final concentration is 0.01% (w / v) or 0.001% (w / v). , Decanoic acid (purchased from SIGMA), dodecanoic acid (purchased from SIGMA), tetradecanoic acid (myristic acid, purchased from SIGMA), hexadecanoic acid (palmitic acid, purchased from SIGMA), octadecanoic acid (stearic acid, SIGMA) And ethanol solution (concentration: 1% (w / v)) of docosanoic acid (behenic acid, purchased from SIGMA)) was added and preincubated for 10 minutes at room temperature. Next, DPD (OMM Scientific was asked to investigate synthesis and purchased by the company) was added so that the final concentration was 10 μM, and aerobic shaking culture was performed at 30 ° C. The luminescence intensity after 4 hours was measured with a chemiluminescence meter (Mitharas LB940 (trade name), manufactured by Bertolud), and the AI-2 inhibitory activity was measured. In addition, the AI-2 inhibitory activity when completely suppressing the light emission induced by DPD was defined as 100, and the AI-2 inhibitory activity when the linear saturated fatty acid was added was shown as a relative value. Further, as a positive control, a known compound (4-bromo-5- (4-methoxyphenyl) -2 (5H) -furanone, manufactured by Sigma) was used as an AI-2 inhibitory compound, and AI-2 inhibitory activity was similarly observed. It was measured.
The results are shown in Table 1.
表1の結果から明らかなように、本発明のAI−2阻害剤は、既知のAI−2阻害化合物に比して、同等もしくはそれ以上のAI−2阻害活性を有することが示された。 As is clear from the results in Table 1, the AI-2 inhibitor of the present invention was shown to have an AI-2 inhibitory activity equal to or higher than that of known AI-2 inhibitory compounds.
試験例2 抗菌試験
試験例1で調製したレポーター菌液を5000倍に希釈し、デカン酸又はドデカン酸のエタノール溶液を9:1の割合(体積比)で混和し、好気条件下で30℃、4時間インキュベートした。さらに、培養菌液をAB培地で100〜10000倍に任意に希釈しMarine Agar 2216培地(商品名、Difco社製)に播種し、30℃で1日培養後、コロニー数をカウントし生菌数を算出した。なお、対象試験として、デカン酸又はドデカン酸のエタノール溶液の代わりにAB培地を用いた以外は同様にして生菌数を算出した。その結果を表2に示す。
Test Example 2 Antibacterial Test The reporter bacterial solution prepared in Test Example 1 was diluted 5000 times, mixed with a decanoic acid or ethanol solution of dodecanoic acid at a ratio (volume ratio) of 9: 1, and 30 ° C. under aerobic conditions. Incubated for 4 hours. Further, the culture solution is arbitrarily diluted 100 to 10,000 times with AB medium and seeded on Marine Agar 2216 medium (trade name, manufactured by Difco). After culturing at 30 ° C. for 1 day, the number of colonies is counted and the number of viable bacteria is counted. Was calculated. In addition, as an object test, the viable cell count was calculated in the same manner except that AB medium was used instead of ethanol solution of decanoic acid or dodecanoic acid. The results are shown in Table 2.
表2に示すように、0.01%(w/v)又は0.001%濃度では、デカン酸及びドデカン酸のレポーター菌に対する抗菌作用は認められなかった。
なお、デカン酸及びドデカン酸は、黄色ブドウ球菌(Staphylococcus aureus)などに対し抗菌作用があることが報告されているが(例えば、Bergsson G.et al.,APMIS,109(10),p.670-678,2001参照)、これはデカン酸を10mM(0.17質量%)、ドデカン酸を5mM(0.10質量%)添加した際の結果である。これに対して、表2に示すように前記有効成分の濃度を0.001〜0.05質量%とした場合、本発明のAI−2阻害剤は病原性細菌に対する殺菌作用を示すものではなく、病原性細菌の種間連絡に利用されるAI−2の活性を阻害するものである。
As shown in Table 2, at 0.01% (w / v) or 0.001% concentration, antibacterial action of decanoic acid and dodecanoic acid on the reporter bacteria was not observed.
Although decanoic acid and dodecanoic acid have been reported to have antibacterial activity against Staphylococcus aureus and the like (for example, Bergsson G. et al., APMIS, 109 (10), p.670). -678, 2001), and this is the result when 10 mM (0.17% by mass) of decanoic acid and 5 mM (0.10% by mass) of dodecanoic acid were added. On the other hand, when the concentration of the active ingredient is 0.001 to 0.05% by mass as shown in Table 2, the AI-2 inhibitor of the present invention does not exhibit a bactericidal action against pathogenic bacteria, and pathogenic bacteria. It inhibits the activity of AI-2, which is used for interspecies communication.
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