JP6069533B2 - 新規のバクテリオファージ及びこれを含む抗菌組成物 - Google Patents
新規のバクテリオファージ及びこれを含む抗菌組成物 Download PDFInfo
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- JP6069533B2 JP6069533B2 JP2015560093A JP2015560093A JP6069533B2 JP 6069533 B2 JP6069533 B2 JP 6069533B2 JP 2015560093 A JP2015560093 A JP 2015560093A JP 2015560093 A JP2015560093 A JP 2015560093A JP 6069533 B2 JP6069533 B2 JP 6069533B2
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- bacteriophage
- φcj23
- avian
- bacteriophage φcj23
- escherichia coli
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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のスクリーニング及び単一バクテリオファージの分離
韓国忠清南道保寧市所在のカモ農場の農場地域の糞便及び環境サンプルから取得した試料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準備し、これを用い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とは、トップアガー(top agar、0.7%の寒天を用いて固体培地上に付着させること)で成長する宿主細胞を用い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意味する。
バクテリオファージの大量培養及び精製
前記実施例1−1で取得したバクテリオファージを鳥類病原性大腸菌(E10−4)を用いて大量培養し、これによりバクテリオファージを精製した。
ΦCJ23の鳥類病原性大腸菌感染性の比較
前記実施例1で精製したバクテリオファージΦCJ23が鳥類病原性大腸菌(E10−4)以外の他の大腸菌に対しても溶菌活性を示すかを確認するために交差感染を行った。
ΦCJ23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ΦCJ23を0.01%のゼラチン溶液に希釈し、2.5%の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された雲母板(carbon−coated mica plate(およそ2.5mm×2.5mm))に滴下して10分間適応させた後、滅菌蒸留水で洗浄した。
ΦCJ23の全体ゲノム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ΦCJ23からゲノムDNAを抽出した。
ΦCJ23のタンパク質パターンの分析
1010pfu/mlタイター(titer)の精製されたバクテリオファージΦCJ23溶液15μlと5×SDS試料溶液3μlを混合して5分間沸騰した後、15%SDS−PAGEを行った(図3)。
ΦCJ23の遺伝子的特性の分析
前記実施例1で精製したバクテリオファージΦCJ23の遺伝子的特性を分析するために、バクテリオファージΦCJ23のDNAを遺伝子分析機器FLXチタンシーケンサー(titanium sequencer)(Roche)を使用して分析した。(株)マクロジェン(Macrogen Inc.)でGSとデ・ノボアセンブリーソフトウェア(de novo assembler software)(Roche)を使用して遺伝子を組み合わせた。転写解読枠(open reading frame)は、GeneMArk.hmm、Glimmer v3.02及びFGENESBソフトウェアを使用して行われた。BLASTPとインタープロスキャン(InterProScan)プログラムを使用して転写解読枠の名称を注釈付け(annotation)した。
pHによるΦCJ23の安定性の調査
バクテリオファージΦCJ23が胃内の低いpHで安定性を有することができるかを確認するために、様々なpH範囲(pH2.1、2.5、3.0、3.5、4.0、5.5、6.4、7.5、8.3、9.2及び11.0)で安定性調査の実験を実施した。
温度によるΦCJ23の安定性の調査
バクテリオファージの製品剤形のうち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の製剤過程で発生する熱に対する安定性を確認するための実験を行った。具体的には、6.5×109pfu/ml濃度のバクテリオファージΦCJ23の溶液100μlを60℃で30分間静置した後、前記実験培養液を段階希釈してソフトアガーオーバーレイ方法で各段階の希釈液10μlずつ滴下した後、37℃で18時間培養して溶菌されるか否かに応じてタイターを測定した(図5)。
野生分離株鳥類病原性大腸菌に対するΦCJ23の感染範囲の調査
実験に使用された鳥類病原性大腸菌(E10−4)以外に韓国の建国大学の獣医科大学で分離した野生分離株鳥類病原性大腸菌の6株に対してバクテリオファージΦCJ23が溶菌活性を有するか否かを確認した。具体的には、各菌株の振とう培養液(OD600=2)150μlを混合してソフトアガーオーバーレイ方法を行い、108pfu/mlタイターのバクテリオファージΦCJ23の溶液10μlずつ滴下した後、37℃で18時間培養して溶菌斑が形成されるか否かを観察した(表3)。
Claims (8)
- 鳥類病原性大腸菌(Avian Pathogenic Escherichia coli)に特異的な死滅効果を奏する、受託番号がKCCM11365Pである新規のバクテリオファージΦCJ23。
- 請求項1に記載の受託番号がKCCM11365PであるバクテリオファージΦCJ23を有効成分として含む、鳥類病原性大腸菌による感染性疾病の予防又は治療用組成物。
- 前記感染性疾病は鳥類大腸菌症である、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組成物。
- 請求項1に記載の受託番号がKCCM11365PであるバクテリオファージΦCJ23を有効成分として含む、抗生剤。
- 請求項1に記載の受託番号がKCCM11365PであるバクテリオファージΦCJ23を有効成分として含む、鳥類用飼料添加剤又は飲用水添加剤。
- 請求項1に記載の受託番号がKCCM11365PであるバクテリオファージΦCJ23を有効成分として含む、消毒剤又は洗浄剤。
- 請求項1に記載の受託番号がKCCM11365PであるバクテリオファージΦCJ23又は請求項2に記載の組成物を鳥類に投与する段階を含む、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、請求項7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/KR2014/001535 WO2014133301A1 (en) | 2013-02-27 | 2014-02-25 | Novel bacteriophage and antibacterial composition comprising the same |
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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 |
WO2019051603A1 (en) | 2017-09-15 | 2019-03-21 | Syntbiolab Inc. | BACTERIOPHAGE COMPOSITION AND METHOD FOR PREVENTING BACTERIAL INFECTIONS IN LIVESTOCK |
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KR101023995B1 (ko) * | 2008-06-10 | 2011-03-28 | 씨제이제일제당 (주) | 대장균 특이적 박테리오파아지 및 이를 이용한 대장균오염의 예방 또는 통제 방법 |
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US20160083695A1 (en) | 2016-03-24 |
US9938506B2 (en) | 2018-04-10 |
JP2016510978A (ja) | 2016-04-14 |
EP2961836B1 (en) | 2017-11-29 |
US20180282703A1 (en) | 2018-10-04 |
US10704027B2 (en) | 2020-07-07 |
EP2961836A1 (en) | 2016-01-06 |
BR112015020699A2 (pt) | 2019-11-19 |
CN105308179B (zh) | 2018-10-19 |
WO2014133301A1 (en) | 2014-09-04 |
ES2654473T3 (es) | 2018-02-13 |
PH12015501889A1 (en) | 2015-12-07 |
KR101381793B1 (ko) | 2014-04-07 |
PH12015501889B1 (en) | 2015-12-07 |
CN105308179A (zh) | 2016-02-03 |
EP2961836A4 (en) | 2016-07-27 |
BR112015020699B1 (pt) | 2023-04-25 |
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