JP7728028B2 - 比色型バイオセンサー、その作製方法およびそれを用いた抗生物質感受性検査方法 - Google Patents
比色型バイオセンサー、その作製方法およびそれを用いた抗生物質感受性検査方法Info
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Description
本発明は、ヒドロゲル高分子およびポリジアセチレン(PDA)からなる多孔性ヒドロゲル構造体;および微生物栄養源(nutrient source)を含む比色型バイオセンサーを提供する。
本発明は、本発明による比色型バイオセンサーおよび抗生物質の存在下で微生物を培養する段階を含む抗生物質感受性検査方法を提供する。
本発明は、(a)ポリジアセチレン(PDA)溶液、ヒドロゲル高分子および微生物栄養源を含むヒドロゲル前駆体溶液を得る段階; (b)塩化カルシウム溶液に前記ヒドロゲル前駆体溶液を滴下し、ヒドロゲル構造体を得る段階;および(c)前記ヒドロゲル構造体に200~300nm波長の紫外線を照射する段階、を含む比色型バイオセンサーの作製方法を提供する。
以下、実施例により本発明をさらに詳細に説明する。
実施例1.カプセル化形態の比色型バイオセンサー(Encapsulated form)の作製
3mMのPDA(Polydiacetylene)溶液、アルギネート(ヒドロゲル前駆体溶液に対して9%(w/v))およびLBブロス(broth)培地を混合し、ヒドロゲル前駆体溶液を準備した。前記ヒドロゲル前駆体溶液をシリンジニードルを通して1%(w/v)塩化カルシウム(CaCl2)溶液で満たされたビーカーに滴下(dripping)した。該滴下した液滴が塊にならないように、マグネティックバーを用いて塩化カルシウム溶液を持続的に掻きまわすことにより、ヒドロゲル前駆体溶液を塩化カルシウムと反応させ、ゲル(gel)状にゲル化(gelation)させた。ゲル化が完了したヒドロゲル構造体を塩化カルシウム溶液から取り出し、蒸留水で洗浄した後、254nm波長のUVを照射し、前記ヒドロゲル構造体の内部のPDAの色を青色に変換し、カプセル化形態の比色型バイオセンサーを作製した(図2bおよび3b参照)。
3mMのPDA(Polydiacetylene)溶液およびアルギネート(ヒドロゲル前駆体溶液に対して9%(w/v))を混合し、ヒドロゲル前駆体溶液を準備した。前記ヒドロゲル前駆体溶液をシリンジニードルを通して1%(w/v)塩化カルシウム(CaCl2)溶液で満たされたビーカーに滴下した。該滴下した液滴が塊にならないように、マグネティックバーを用いて、塩化カルシウム溶液を持続的に掻きまわすことにより、ヒドロゲル前駆体溶液を塩化カルシウムと反応させ、ゲル(gel)状にゲル化(gelation)させた。ゲル化が完了したヒドロゲル構造体を塩化カルシウム溶液から取り出して蒸留水で洗浄した後、254nm波長のUVを照射し、前記ヒドロゲル構造体内部のPDAの色を青色に変換した。その後、ゲル化が完了したヒドロゲル構造体を、疎水性液状のLB寒天(agar)培地にピペットを用いて落とし、薄い膜状で覆われるようにした。コーティングされたLB寒天(agar)培地は、低温により速やかに固まり、最終的にバクテリア成長源を層状(layered)形態で有する比色型バイオセンサーを作製した(図2aおよび図3a参照)。
LBブロス(Broth)培地がカプセル化形態の比色型バイオセンサー(a)外部および(b)内部に位置した場合、センサーの感受性感度比較実験を行って図4に示した。
前記実施例1により作製されたカプセル化形態の比色型バイオセンサーの抗生物質感受性検査実験を行い、その結果を図5に示した。
Claims (14)
- ヒドロゲル高分子およびポリジアセチレンからなる多孔性ヒドロゲル構造体;および
微生物栄養源(nutrient source)を含み、前記微生物栄養源は、Luria-Berani(LB)ブロス、LB寒天培地、トリプティックソイブロス(TSB)、Lactobacilli MRS培地、R2A培地(MB-R2230)、Mueller Hinton(MH)培地、およびカゼイン加水分解物(casamino acid)含有培地からなる群から選択される1種以上を含む、比色型バイオセンサー。 - 前記微生物栄養源は、前記多孔性ヒドロゲル構造体の内部にカプセル化されたものである、請求項1に記載の比色型バイオセンサー。
- 前記微生物栄養源は、前記多孔性ヒドロゲル構造体の表面を取り囲むシェル状に形成されたものである、請求項1に記載の比色型バイオセンサー。
- 前記ヒドロゲル高分子は、アルギネート、アガロース、キトサン、ポリ(エチレングリコール)ジアクリレート(PEG-DA)、ヒドロキシエチレンメタクリレート(HEMA)、ポリビニルアルコール(PVA)およびポリアクリルアミド(PAM)からなる群から選ばれる1種以上を含む、請求項1に記載の比色型バイオセンサー。
- 前記比色型バイオセンサーは、色変化を通じて微生物を検出するものである、請求項1に記載の比色型バイオセンサー。
- 前記微生物は、バクテリア(bacterium)、真菌(fungus)、海藻(alga)、原生動物(protozoan)、および後生動物(metazoan)の単離された細胞からなる群から選択される1種以上を含む、請求項1に記載の比色型バイオセンサー。
- 請求項1~6のいずれか一項に記載の比色型バイオセンサーおよび抗生物質の存在下で微生物を培養する段階を含む、抗生物質感受性検査方法。
- 前記比色型バイオセンサーの比色変化がない場合に、前記微生物が前記抗生物質に対する感受性を有するものと判断し、
前記比色型バイオセンサーの比色変化が存在する場合に、前記微生物が前記抗生物質に対する抵抗性を有するものと判断するものである、請求項7に記載の抗生物質感受性検査方法。 - 請求項1~6のいずれか一項に記載の比色型バイオセンサーおよび抗生物質を含む、抗生物質感受性検査用キット。
- (a)ポリジアセチレン溶液、ヒドロゲル高分子および微生物栄養源を含むヒドロゲル前駆体溶液を得る段階;
(b)塩化カルシウム溶液に前記ヒドロゲル前駆体溶液を滴下し、ヒドロゲル構造体を得る段階;および
(c)前記ヒドロゲル構造体に200~300nm波長の紫外線を照射する段階を含み、
前記微生物栄養源は、Luria-Berani(LB)ブロス、LB寒天培地、トリプティックソイブロス(TSB)、Lactobacilli MRS培地、R2A培地(MB-R2230)、Mueller Hinton(MH)培地、およびカゼイン加水分解物(casamino acid)含有培地からなる群から選択される1種以上を含む、比色型バイオセンサーの作製方法。 - 前記ヒドロゲル前駆体溶液中の前記ヒドロゲル高分子の濃度は、1.0~15.0%(w/v)である、請求項10に記載の比色型バイオセンサーの作製方法。
- 前記ポリジアセチレン溶液の濃度は、0.5~5mMである、請求項10に記載の比色型バイオセンサーの作製方法。
- 前記塩化カルシウム溶液の濃度は、0.5~20.0%(w/v)である、請求項10に記載の比色型バイオセンサーの作製方法。
- 前記比色型バイオセンサーは、ヒドロゲル高分子およびポリジアセチレンからなる多孔性ヒドロゲル構造体;および前記微生物栄養源を含み、
前記微生物栄養源が前記多孔性ヒドロゲル構造体の内部にカプセル化されるか、または前記微生物栄養源が前記多孔性ヒドロゲル構造体の表面を取り囲むシェル状で形成されるものである、請求項10に記載の比色型バイオセンサーの作製方法。
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| KR10-2022-0002636 | 2022-01-07 | ||
| KR1020220002636A KR102826375B1 (ko) | 2022-01-07 | 2022-01-07 | 비색형 바이오센서, 이의 제조방법 및 이를 이용한 항생제 감수성 검사방법 |
| PCT/KR2022/020936 WO2023132528A1 (ko) | 2022-01-07 | 2022-12-21 | 비색형 바이오센서, 이의 제조방법 및 이를 이용한 항생제 감수성 검사방법 |
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| KR102071507B1 (ko) | 2018-03-26 | 2020-01-30 | 국민대학교산학협력단 | 바이오센서용 하이드로겔 구조체, 이를 포함하는 바이오센서, 및 상기 바이오센서용 하이드로겔 구조체의 제조방법 |
| WO2020223202A1 (en) | 2019-05-01 | 2020-11-05 | The Trustees Of Princeton University | Bacteria in 3d porous media |
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|---|---|---|---|---|
| US20150259722A1 (en) | 2012-09-28 | 2015-09-17 | Cirle | Biosensor compositions and methods of their use |
| KR102071507B1 (ko) | 2018-03-26 | 2020-01-30 | 국민대학교산학협력단 | 바이오센서용 하이드로겔 구조체, 이를 포함하는 바이오센서, 및 상기 바이오센서용 하이드로겔 구조체의 제조방법 |
| WO2020223202A1 (en) | 2019-05-01 | 2020-11-05 | The Trustees Of Princeton University | Bacteria in 3d porous media |
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| CN117136297A (zh) | 2023-11-28 |
| WO2023132528A1 (ko) | 2023-07-13 |
| KR102826375B1 (ko) | 2025-06-26 |
| US20240117405A1 (en) | 2024-04-11 |
| KR20230106910A (ko) | 2023-07-14 |
| JP2024511404A (ja) | 2024-03-13 |
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