JP6314250B2 - 新たなバクテリオファージ及びこれを含む組成物 - Google Patents
新たなバクテリオファージ及びこれを含む組成物 Download PDFInfo
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- JP6314250B2 JP6314250B2 JP2016563041A JP2016563041A JP6314250B2 JP 6314250 B2 JP6314250 B2 JP 6314250B2 JP 2016563041 A JP2016563041 A JP 2016563041A JP 2016563041 A JP2016563041 A JP 2016563041A JP 6314250 B2 JP6314250 B2 JP 6314250B2
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- bacteriophage
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Description
鳥類病原性大腸菌に感染するバクテリオファージの分離
バクテリオファージスクリーニング及び単一バクテリオファージの分離
韓国忠清道清原郡にある養鶏農場で鶏の糞便から得た試料50mlを4000rpmで10分間遠心分離した後、その上澄み液を0.45μmのフィルターで濾過して、試料液を用意し、これを利用してソフトアガーオーバーレイ(soft agar overlay)方法を行った。前記ソフトアガーオーバーレイ方法は、トップアガー(top−agar、0.7%の寒天を利用して固体培地上に付着させたもの)で成長した宿主細胞を利用してバクテリオファージが溶菌することを観察する方法をいう。
バクテリオファージの大量培養及び精製
実施例1−1で得た前記バクテリオファージを、鳥類病原性大腸菌(E09−19)を利用して大量培養し、これからバクテリオファージを精製した。
ΦCJ25の形態観察
前記実施例1で精製したバクテリオファージΦCJ25を0.01%のゼラチン溶液に希釈し、2.5%グルタルアルデヒド(glutaraldehyde)溶液で固定した。これを炭素コーティングした雲母板(carbon−coated mica plate(約2.5mm×2.5mm))に滴下し、10分間適応させた後、滅菌蒸留水で洗浄した。
ΦCJ25の全ゲノムDNAのサイズ分析
前記実施例1で精製したバクテリオファージΦCJ25からゲノムDNAを抽出した。
ΦCJ25のタンパク質パターンの分析
1011pfu/mlタイター(titer)の精製されたバクテリオファージΦCJ25溶液15μlと、5×SDS試料溶液3μlとを混合し、5分間沸騰させた後、12%SDS−PAGEを行った(図3)。
ΦCJ25の遺伝的特性の分析
前記実施例1で精製されたバクテリオファージΦCJ25の遺伝的特性を調べるため、バクテリオファージΦCJ25のDNAを遺伝子分析機器であるFLXチタニウムシークエンサー(titanium sequencer)(ロシュ・ダイアグノスティックス株式会社製)を用いて分析した。株式会社マクロジェン(Macrogen Inc.)で、GSとデ・ノボアセンブリソフトウェア(de novo assembler software)(ロシュ・ダイアグノスティックス株式会社製)を用いて遺伝子の組換えを行った。オープンリーディングフレーム(open reading frame)はGeneMArk.hmm、Glimmer v3.02及びFGENESBソフトウェアを用いて行われた。BLASTPとインタープロスキャン(InterProScan)プログラムを用いてオープンリーディングフレームの名称を命名(annotation)した。
pHによるΦCJ25の安定性の調査
バクテリオファージΦCJ25が胃腸内の条件と同様に低いpHで安定性を保つことができるかを確認するため、様々なpH範囲(pH2.5、3.0、3.5、4.0、5.5、6.5、7.0、8.0、9.0、10.0、11.0)で安定性の調査実験を行った。
温度によるΦCJ25の安定性の調査
バクテリオファージの製品剤形の中で飼料添加剤として利用した場合、バクテリオファージの剤形過程において熱が発生する可能性があり、熱に対する安定性を確認するため下記の実験を行った。
乾燥に対する安定性の調査
バクテリオファージの製品剤形の中で飼料添加剤として利用する場合、バクテリオファージの剤形過程で乾燥過程があり、乾燥条件に対するΦCJ25の安定性を確認するため、下記の実験を行った。
野生分離株の鳥類病原性大腸菌に対するΦCJ25の感染範囲の調査
バクテリオファージΦCJ25が、実験で用いられた鳥類病原性大腸菌(E09−19)以外に、建国大学校獣医科大学で分離した野生分離鳥類病原性大腸菌46株、検疫院で分離した鳥類病原性大腸菌10株、全北大獣医科大学で分離した鳥類病原性大腸菌7株、コミファーム農場で分離した病性鑑定鳥類病原性大腸菌26株に対して溶菌活性の有無を確認した。
Claims (12)
- 鳥類病原性大腸菌(Avian Pathogenic Escherichia coli)に特異的な死滅能を有し、寄託番号がKCCM11463Pである、バクテリオファージΦCJ25。
- 請求項1の前記バクテリオファージΦCJ25を有効成分として含み、O−1、O78及びO−125の少なくとも何れか1つの血清型を有する鳥類病原性大腸菌による感染性疾病の予防又は治療用の組成物。
- 前記感染性疾病は、鳥類大腸菌症であることを特徴とする、請求項2に記載の鳥類病原性大腸菌による感染性疾病の予防又は治療用の組成物。
- 請求項1の前記バクテリオファージΦCJ25を有効成分として含む、抗生剤。
- 請求項1の前記バクテリオファージΦCJ25を有効成分として含む、鳥類用飼料添加剤。
- 請求項5の鳥類用飼料添加剤を含む、鳥類用飼料。
- 請求項1の前記バクテリオファージΦCJ25を有効成分として含む、鳥類用飲用水添加剤。
- 請求項7の鳥類用飲用水添加剤を含む、鳥類用飲用水。
- 請求項1の前記バクテリオファージΦCJ25を有効成分として含む、消毒剤。
- 請求項1の前記バクテリオファージΦCJ25を有効成分として含む、洗浄剤。
- 請求項1の前記バクテリオファージΦCJ25又は請求項2の前記組成物を鳥類に投与する段階を含み、O−1、O78及びO−125の少なくとも何れか1つの血清型を有する鳥類病原性大腸菌による感染性疾病を予防又は治療する方法。
- 前記感染性疾病は鳥類大腸菌症であることを特徴とする、請求項11に記載の鳥類病原性大腸菌による感染性疾病を予防又は治療する方法。
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PCT/KR2015/003705 WO2015160165A1 (ko) | 2014-04-15 | 2015-04-14 | 신규 박테리오파지 및 이를 포함하는 조성물 |
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KR101649851B1 (ko) | 2014-12-30 | 2016-08-30 | 주식회사 인트론바이오테크놀로지 | 신규한 시가독소생산 F18형 대장균 박테리오파지 Esc-COP-1 및 이의 시가독소생산 F18형 대장균 증식 억제 용도 |
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US11058131B2 (en) | 2015-04-16 | 2021-07-13 | Kennesaw State University Research And Service Foundation, Inc. | Escherichia coli O157:H7 bacteriophage Φ241 |
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