KR20140071968A - Pcr에 의한 미생물 dna 검출 방법, 이를 위한 시스템 및 조성물 - Google Patents
Pcr에 의한 미생물 dna 검출 방법, 이를 위한 시스템 및 조성물 Download PDFInfo
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- KR20140071968A KR20140071968A KR1020137033578A KR20137033578A KR20140071968A KR 20140071968 A KR20140071968 A KR 20140071968A KR 1020137033578 A KR1020137033578 A KR 1020137033578A KR 20137033578 A KR20137033578 A KR 20137033578A KR 20140071968 A KR20140071968 A KR 20140071968A
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Abstract
Description
도 2는 시판중인 중합 효소들이 박테리아 DNA의 감수성 및 특이적 광범위 증폭에 사용되기에 충분히 순수하지 못함을 나타내는 겔 전기 영동 이미지를 나타낸다.
도 3은 본 발명의 구체예들에 따른 PE-PCR 방법이 오염 박테리아 DNA를 함께 증폭시키지 않으면서 표적 박테리아 DNA를 특이적으로 증폭시킬 수 있음을 보여주는 겔 전기 영동 이미지를 나타낸다. (A) 소정량의 에스.아우레우스(S. aureus) 게놈 DNA를 대상으로 하여 PE-PCR을 수행한 결과(이 경우, 융합 프로브 M13-TstaG422 및 프라이머 세트 M13 및 TstaG765 사용). (B) 에스. 아우레우스 게놈 DNA(100fg)를 대상으로 PE-PCR을 수행한 결과(상부 패널)[패널 A와 같은 조건(레인 1), M13 프라이머 부재시(레인 2), 그리고 100fg 에스. 아우레우스 게놈 DNA를 EK 혼합물에 첨가하거나(레인 3) PCR 혼합물에 첨가하여(레인 4) 조성한 인공 오염 조건]. PE-PCR은 또한 주형 DNA의 부재 하에서도 수행되었다(레인 5). 에스. 아우레우스 게놈 DNA의 존재는 종 특이적 PCR(에스.아우레우스에 특이적인 염색체 DNA 단편을 증폭함(하부 패널))에 의해 확인되었다. (C) 소정량의 에스. 아우레우스 게놈 DNA를 광범위 PE-PCR용 주형으로서 사용하였을 때의 결과(융합 프로브 M13-16S-p201F 및 프라이머 세트 M13 및 p1370 사용). (D) 에스. 아우레우스 게놈 DNA(100fg)를 대상으로 광범위 PE-PCR을 수행한 결과(상부 패널)(패널 C와 같은 조건(레인 1), 100fg 에스. 아우레우스 게놈 DNA를 EK 혼합물에 첨가하거나(레인 2) PCR 혼합물에 첨가하여(레인 3) 조성한 인공 오염 조건). 광범위 PE-PCR은 또한 주형 DNA의 부재 하에서도 수행되었다(레인 4). 에스. 아우레우스 게놈 DNA의 존재는 종 특이적 PCR(에스.아우레우스의 염색체 DNA 단편을 증폭함(하부 패널))에 의해 확인되었다. NTC는 주형 대조군이 존재하지 않음을 나타낸다.
도 4는 PCR 시약들을 DNase I로 전처리한 후 주형 박테리아 DNA를 대상으로 수행된 광범위 실시간 PE-PCR 증폭법 및 광범위 실시간 PCR 증폭법을 비교한 결과를 나타낸다. (A) 소정량의 에스. 아우레우스 게놈 DNA를 대상으로 광범위 실시간 PE-PCR을 수행한 결과(LC그린 I 플러스 HRM 염료의 존재하에 융합 프로브 M13-16S-p201F 및 프라이머 세트 M13 및 p1370 사용). (C) 대안적으로, DNase I(1U 및 2.5U)으로 전처리하였거나 전처리 하지 않은 PCR 반응 혼합물을 실시간 PCR용으로 사용하여, 소정량의 에스. 아우레우스 게놈 DNA를 증폭하였다. PCR 생성물들을 대상으로 HRMA를 수행하였다(HR-1 기기 사용). 증폭 결과(좌측 컬럼의 그래프 전부) 및 미분 플롯(우측 컬럼의 그래프 전부)를 보였다. NTC는 주형 대조군이 존재하지 않음을 나타낸다.
도 5는 12개의 상이한 박테리아 종에 대한 광범위 실시간 PE-PCR 및 HRMA에 대한 변성 곡선 플롯을 나타낸다. 12개의 상이한 박테리아 종으로부터 유래하는 게놈 DNA 소정량을 대상으로 광범위 실시간 PE-PCR을 수행하였다(이 경우, LC그린 I 플러스의 존재 하에 융합 프로브 M13-16S-p201F 및 프라이머 세트 M13 및 p1370을 사용함). PCR 생성물을 대상으로 HRMA를 수행하였으며(HR-1 기기 사용), 미분 플롯을 보였다. NTC는 주형 대조군이 존재하지 않음을 나타낸다.
도 6은 본 발명의 구체예들에 따른 시스템의 개략도를 나타낸다.
Claims (20)
- 융합 프로브 다수개를 표적 미생물 DNA에 혼성화하는 단계(여기서, 상기 융합 프로브 각각은 비 박테리아 DNA 서열을 가지는 5' 말단부와, 상기 표적 미생물 DNA 일부에 상보성인 서열을 가지는 3' 말단부로 이루어짐);
표적 미생물 DNA의 임의의 미결합 3' 말단부 및 비혼성화 융합 프로브를 제거하는 단계;
표적 미생물 DNA와 융합 프로브의 3' 말단을 연장하여 이중 가닥의 프라이머 연장된 주형을 형성하는 단계; 및
융합 프로브의 비 박테리아 서열에 상보성인 비 박테리아 서열을 가지는 프라이머 1개 이상을 포함하는 프라이머 세트를 사용하여 프라이머 연장된 주형을 선택적으로 증폭하는 PCR 방법을 수행하는 단계
를 포함하는, 샘플 중 표적 미생물 DNA 1개 이상을 선택적으로 증폭하는 방법. - 제1항에 있어서, 제거 단계 및 연장 단계는 엑소뉴클레아제 I 및 클레나우 DNA 중합 효소의 혼합물을 첨가하는 단계를 포함하는 방법.
- 제1항에 있어서, 상기 융합 프로브의 5' 말단부의 비 박테리아 서열은 바이러스 DNA 서열 또는 인공적으로 디자인된 서열로부터 선택되는 방법.
- 제1항에 있어서, 상기 융합 프로브의 3' 말단부의 서열은 16S rRNA 유전자 서열의 보존된 부분에 상보성인 방법.
- 제1항에 있어서, 표적 미생물 DNA는 박테리아, 진균 또는 바이러스의 게놈 DNA로부터 선택되는 방법.
- 제1항에 있어서, 상기 PCR 방법은 표준적 PCR 또는 실시간 PCR로부터 선택되는 방법.
- 제1항에 있어서, 상기 샘플은 박테리아 DNA 오염에 대해 미처리된 방법.
- 피험체의 샘플에 다수개의 융합 프로브를 첨가하는 단계(여기서, 상기 융합 프로브 각각은 비 박테리아 DNA 서열을 가지는 5' 말단부와, 상기 표적 미생물 DNA 일부에 상보성인 서열을 가지는 3' 말단부로 이루어짐);
상기 융합 프로브를 샘플 중 미생물 DNA에 혼성화하는 단계;
미생물 DNA의 임의의 미결합 3' 말단부 및 비 혼성화 융합 프로브를 제거하는 단계;
미생물 DNA와 융합 프로브의 3' 말단을 연장하여 이중 가닥의 프라이머 연장된 주형을 형성하는 단계;
융합 프로브의 비 박테리아 서열에 상보성인 비 박테리아 서열을 가지는 정방향 프라이머 1개 이상을 포함하는 프라이머 세트를 사용하여 PCR 방법을 수행함으로써 프라이머 연장된 주형을 증폭하는 단계; 및
증폭된 PCR 생성물을 분석하여 미생물의 존재 또는 부재를 확인하는 단계
를 포함하는, 피험체 내 미생물 감염을 검출하는 방법. - 제9항에 있어서, 상기 샘플은 박테리아 DNA 오염에 대해 미처리된 방법.
- 제9항에 있어서, 상기 1개 이상의 미생물은 박테리아, 진균 또는 바이러스로부터 선택되는 방법.
- 제9항에 있어서, 상기 융합 프로브의 5' 말단부의 비 박테리아 서열은 바이러스 서열 또는 인공적으로 디자인된 서열로부터 선택되는 방법.
- 제9항에 있어서, 상기 융합 프로브의 3' 말단부의 서열은 16S rRNA 유전자 서열의 보존된 부분에 상보성인 방법.
- 비 박테리아 서열을 가지는 5' 말단부; 및
표적 미생물 샘플의 일부와 상보성인 서열을 가지는 3' 말단부
로 이루어진, PCR 방법에 의한 선택적 증폭을 위해서 샘플 중 표적 미생물 DNA로부터 프라이머 연장된 DNA 주형을 생성하기 위한 융합 프로브. - 제13항에 있어서, 상기 비 박테리아 서열은 바이러스 서열인 융합 프로브.
- 제13항에 있어서, 상기 비 박테리아 서열은 M13 정방향 프라이머 서열인 융합 프로브.
- 제13항에 있어서, 상기 융합 프로브의 3' 말단부의 서열은 16S rRNA 유전자의 보존된 서열에 상보성인 융합 프로브.
- 제13항에 의한 융합 프로브 다수개를 포함하는, 선택적인 PCR 증폭 및 검출을 위하여 표적 미생물 DNA로부터 프라이머 연장된 DNA 주형을 생성하기 위한 키트.
- 제17항에 있어서, 3' →5' 엑소뉴클레아제 및 클레나우 DNA 중합 효소의 혼합물을 추가로 포함하는 키트.
- 샘플을 수용하기 위한 샘플 수용 유닛(sample receiving unit);
샘플 처리 유닛(sample processing unit); 및
상기 샘플을 분석하기 위한 샘플 분석 유닛(sample analyzing unit)
을 포함하고,
상기 샘플 처리 유닛은,
제13항에 의한 융합 프로브들 다수개를 샘플에 첨가하고, 상기 융합 프로브들이 샘플 중 미생물 DNA와 혼성화하도록 만드는 반응 조건을 유지하는 단계;
분해/연장 시약을 첨가하여, 혼성화된 표적 미생물 DNA의 미결합 3' 말단부 및 비 혼성화 융합 프로브를 제거하고, 표적 미생물 DNA 및 혼성화된 융합 프로브들의 3' 말단을 3' →5' 방향으로 연장하여 이중 가닥의 프라이머 연장된 주형을 생성하는 단계;
PCR 시약을 첨가하고 반응 조건을 유지하여 프라이머 연장된 주형들을 PCR 증폭을 수행하는 단계(여기서, 상기 PCR 시약은 융합 프로브의 비 박테리아 서열에 상보성인 서열을 가지는 프라이머 1개 이상을 포함함); 및
처리된 샘플을 분석용 분석 유닛으로 보내는 단계
를 수행하도록 구성된 컴퓨터 제어 유닛인, 샘플 중 표적 미생물을 검출하기 위한 시스템. - 제19항에 있어서, 상기 분석 유닛은 고 해상도 변성 곡선 분석 유닛인 시스템.
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US11940446B2 (en) | 2018-04-03 | 2024-03-26 | Industry-University Cooperation Foundation Hanyang University Erica Campus | Structure for microbe detection, manufacturing method therefor, and microbe detection method using same structure for microbe detection |
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EP2710155A2 (en) | 2014-03-26 |
WO2012159060A3 (en) | 2013-01-17 |
US9388458B2 (en) | 2016-07-12 |
JP6112623B2 (ja) | 2017-04-12 |
EP2710155A4 (en) | 2014-10-29 |
TWI465572B (zh) | 2014-12-21 |
AU2012255042B2 (en) | 2017-10-12 |
TW201247878A (en) | 2012-12-01 |
WO2012159060A2 (en) | 2012-11-22 |
CN103917660B (zh) | 2018-03-23 |
AU2012255042A1 (en) | 2014-01-09 |
JP2014516529A (ja) | 2014-07-17 |
CN103917660A (zh) | 2014-07-09 |
CA2842659A1 (en) | 2012-11-22 |
US20120295806A1 (en) | 2012-11-22 |
BR112013029601A2 (pt) | 2017-06-13 |
RU2620953C2 (ru) | 2017-05-30 |
RU2013153505A (ru) | 2015-06-27 |
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