JP2024505573A - ビフェニル誘導体化合物を有効成分として含有する抗菌補助剤及びこの用途 - Google Patents
ビフェニル誘導体化合物を有効成分として含有する抗菌補助剤及びこの用途 Download PDFInfo
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- JP2024505573A JP2024505573A JP2023546500A JP2023546500A JP2024505573A JP 2024505573 A JP2024505573 A JP 2024505573A JP 2023546500 A JP2023546500 A JP 2023546500A JP 2023546500 A JP2023546500 A JP 2023546500A JP 2024505573 A JP2024505573 A JP 2024505573A
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- acinetobacter
- antibiotics
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- 238000005502 peroxidation Methods 0.000 description 1
- 229960003424 phenylacetic acid Drugs 0.000 description 1
- 239000003279 phenylacetic acid Substances 0.000 description 1
- COLNVLDHVKWLRT-UHFFFAOYSA-N phenylalanine Natural products OC(=O)C(N)CC1=CC=CC=C1 COLNVLDHVKWLRT-UHFFFAOYSA-N 0.000 description 1
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- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 108010073734 polymyxin D Proteins 0.000 description 1
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- 239000003910 polypeptide antibiotic agent Substances 0.000 description 1
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- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
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- 229910052700 potassium Inorganic materials 0.000 description 1
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- MFDFERRIHVXMIY-UHFFFAOYSA-N procaine Chemical compound CCN(CC)CCOC(=O)C1=CC=C(N)C=C1 MFDFERRIHVXMIY-UHFFFAOYSA-N 0.000 description 1
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- 238000001243 protein synthesis Methods 0.000 description 1
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- 150000007660 quinolones Chemical class 0.000 description 1
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- 108091006091 regulatory enzymes Proteins 0.000 description 1
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- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
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- 239000000377 silicon dioxide Substances 0.000 description 1
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- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
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- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
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- 230000002194 synthesizing effect Effects 0.000 description 1
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- 208000008203 tachypnea Diseases 0.000 description 1
- 206010043089 tachypnoea Diseases 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 235000019364 tetracycline Nutrition 0.000 description 1
- 150000003522 tetracyclines Chemical class 0.000 description 1
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- 125000003396 thiol group Chemical class [H]S* 0.000 description 1
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- 108700012359 toxins Proteins 0.000 description 1
- 230000014616 translation Effects 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000002132 β-lactam antibiotic Substances 0.000 description 1
- 229940124586 β-lactam antibiotics Drugs 0.000 description 1
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Abstract
Description
(ここで、Xは、ハロゲン原子であり、R1及びR2は、それぞれ独立して水素原子又は炭素数1から6のアルキルである。)
1-1.PA108化合物の選別
本発明では、韓国化学研究院の化合物バンクで保有している多様な化合物のうちポリミキシンとともに作用してポリミキシン耐性細菌を死滅させることができる物質を細胞呼吸量測定方法を用いてスクリーニングした。細菌は、延世大学病院の敗血症感染患者から分離してポリミキシン抵抗性菌株であると同時に多剤耐性菌株であるアシネトバクター・バウマニ (Acinetobacter baumannii colistin resistance357、以下、R357菌株)に同定された細菌の提供を受けて実験に用いた。
PA108化合物の活性の構造的連関性を見出すため[表1]に記載された総14種のPA108誘導体(derivatives)を準備し、これらとPMBのシナジー効果を細菌呼吸量測定法を介して検証した。PA108誘導体は、韓国化学研究院の化合物バンクで提供を受けるか直接合成して用いた。
PA108の抗菌活性を確認するために、実施例1で用いた方法により細胞呼吸量を測定することにより細菌生長阻害効果を確認した。
抗生剤の効能には、大きく2つがある。細菌の死滅を起こさず生長を阻害する静菌剤(bacteriostatic)と細菌の死滅を起こす殺菌剤(bactericidal)が存在する。PA108がポリミキシンとともに処理されたとき実際に殺菌効果を増加させるか確認するために細菌の生存実験(viability test)を行った。
PA108をポリミキシン系抗生剤と併用処理したときシナジー(synergy)効果が示されることを確認するためにチェッカーボード分析(checkerboard assay)を行い、この結果を介してFICI (fractional inhibitory concentration index)を求めた。
PA108をポリミキシン系抗生剤と併用処理したとき細菌の形態学的変化を確認するために蛍光顕微鏡と走査電子顕微鏡(Scanning Electron Microscope)を用いて細菌の形態学的変化を観察した。
ポリミキシン系抗生剤の場合、腎毒性が存在するものと知られているためPMBとPA108に対する腎毒性を人体由来の腎細胞ACHN(ATCC(登録商標)CRL-1611TM)を用いて測定した。
ポリミキシン系抗生剤耐性菌株R357感染マウスモデルにおけるPA108とPMBの同時処理がR357感染により誘発された敗血症治療に効果を示すか否かを確認した。
R357菌株以外に他の種(species)のポリミキシン耐性菌においてもPA108をポリミキシン系抗生剤と同時処理したときシナジー(synergy)効果を示すか否かを確認するためにチェッカーボード分析(checkerboard assay)を行い、この結果を介してFICI(fractional inhibitory concentration index)を求めた。
PA108をポリミキシン系抗生剤であるPMBと併用処理したとき、耐性菌の死滅に関与する主要遺伝子の発現変化を転写体分析を介して確認した。
ポリミキシンE(コルスチン)は、グラム陰性菌の細胞外膜にあるLPS(Lipopolysaccharide)とリン脂質に特異的に結合して殺菌活性を示し、コルスチン耐性細菌は、外膜の変形したLPSによりコルスチンと細菌外膜の親和力が減少されコルスチンに対して耐性を示す。したがって、PA108の添加が細菌膜電位及び透過性に変化を起こすか否かを確認した。
Claims (14)
- 下記化学式1で表される化合物又はこの薬学的に許容可能な塩を有効成分として含有する抗菌補助剤:
ここで、
Xは、ハロゲン原子であり、
R1及びR2は、それぞれ独立して水素原子又は炭素数1から6のアルキルである。 - Xは、塩素原子であり、R1は水素原子であり、R2は、メチルである、請求項1に記載の抗菌補助剤。
- 前記抗菌補助剤は、細菌のポリミキシン系抗生剤に対する感受性を向上させるものである、請求項1又は2に記載の抗菌補助剤。
- 前記ポリミキシン系抗生剤は、ポリミキシンB又はポリミキシンEである、請求項3に記載の抗菌補助剤。
- 前記細菌は、グラム陰性細菌(gram-negative bacteria)である、抗菌補助剤。
- 前記グラム陰性細菌は、エシェリキア属(Escherichia sp.)細菌、アシネトバクター属(Acinetobacter sp.)細菌、シュードモナス属(Pseudomonas sp.)細菌又はクレブシエラ属(Klebsiella sp.)細菌である、請求項5に記載の抗菌補助剤。
- 前記エシェリキア属細菌は、エシェリキア・コリ(Escherichia coli)、エシェリキア・アルベルティ(Escherichia albertii)、エシェリキア・ブラタエ(Escherichia blattae)、エシェリキア・フェルグソニー(Escherichia fergusonii)、エシェリキア・ヘルマンニ(Escherichia hermannii)及びエシェリキア・ブルネリス(Escherichia vulneris)より構成される群から選択される少なくとも1つであり、
前記アシネトバクター属細菌は、アシネトバクター・バウマニ(Acinetobacter baumannii)、アシネトバクター・ジュニ(Acinetobacter junii)、アシネトバクター・ボイシエリ(Acinetobacter boissieri)、アシネトバクター・カルコアセティカス(Acinetobacter calcoaceticus)、アシネトバクター・ヘモリティクス(Acinetobacter haemolyticus)、アシネトバクター・ノソコミアリス(Acinetobacter nosocomialis)、アシネトバクター・シンドレリ(Acinetobacter schindleri)及びアシネトバクター・ウルシンギイ(Acinetobacter ursingii)より構成される群から選択される少なくとも1つであり、
前記シュードモナス属(Pseudomonas sp.)細菌は、シュードモナス・エルギノーザ(Pseudomonas aeruginosa); シュードモナス・フルオレッセンス(Pseudomonas fluorescens)、シュードモナス・プチダ(PseudomonasPutida)、シュードモナス・クロロラフィス(Pseudomonas chlororaphis)、シュードモナス・ペルツシノゲナ(PseudomanasPertucinogena)、シュードモナス・スタッツェリ(Pseudomanas stutzeri)及びシュードモナス・シリンガエ(Pseudomanas syringae)より構成される群から選択される少なくとも1つであり、
前記クレブシエラ属細菌は、クレブシエラ・ニューモニエ(Klebsiella Pneumonia)、クレブシエラ・グラニュロマティス(Klebsiella granulomatis)、クレブシエラ・オキシトカ(Klebsiella oxytoca)及びクレブシエラ・テリジェナ(Klebsiella terrigena)より構成される群から選択される少なくとも1つである、請求項6に記載の抗菌補助剤。 - 前記グラム陰性細菌は、ポリミキシン系抗生剤に耐性がある細菌であるか、多剤耐性(multi-drug resistance)細菌である、請求項5に記載の抗菌補助剤。
- 請求項1に記載の抗菌補助剤、及びポリミキシン系抗生剤を有効成分として含有する抗菌用組成物。
- 前記組成物は、グラム陰性細菌の細胞死滅を誘導するものである、請求項9に記載の抗菌用組成物。
- 前記組成物は、グラム陰性細菌の細胞の膜脱分極を誘導して細胞膜を損傷させるものである、請求項9に記載の抗菌用組成物。
- 請求項1に記載の抗菌補助剤及びポリミキシン系抗生剤を有効成分として含有する敗血症又は敗血症性ショックによる臓器損傷の予防又は治療用薬学的組成物。
- 前記敗血症又は敗血症性ショックは、エシェリキア属(Escherichia sp.)細菌又はアシネトバクター属(Acinetobacter sp.)細菌の感染により誘発されたものである、請求項12に記載の薬学的組成物。
- 前記臓器は、肝臓、腎臓及び肺より構成される群から選択される少なくとも1つである、請求項12に記載の薬学的組成物。
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