KR101303699B1 - Pna 칩을 이용한 다종 식중독균 검출 방법 - Google Patents
Pna 칩을 이용한 다종 식중독균 검출 방법 Download PDFInfo
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- KR101303699B1 KR101303699B1 KR1020110071815A KR20110071815A KR101303699B1 KR 101303699 B1 KR101303699 B1 KR 101303699B1 KR 1020110071815 A KR1020110071815 A KR 1020110071815A KR 20110071815 A KR20110071815 A KR 20110071815A KR 101303699 B1 KR101303699 B1 KR 101303699B1
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- food poisoning
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- poisoning bacteria
- pna
- pna probe
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- C12R2001/445—Staphylococcus aureus
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Abstract
Description
도 2는 세균 특이적인 ITS 부분 정보를 찾기 위해 사용된 서열들의 예들이다.
도 3은 최적 프로브를 선별하기 위한 후보 프로브들의 평가 결과를 보여주는 사진 결과이다.
도 4는 본 발명의 실시예에서 제작하여 사용한 PNA 칩에 있어 프로브의 종류와 위치를 모식적으로 나타낸 도면이다.
도 5는 본 발명에 따른 PCR 조건으로 수행한 특정 병원균들의 증폭 결과의 전기 영동 사진 결과이다.
도 6은 증균 과정을 거치지 않는, 농산물에 오염되어 있는 유해세균 회수율을 측정하는 과정을 나타낸 도면이다.
도 7 및 8은 일반적인 PCR 검출법으로 검출 가능한 최저 농도를 파악하기 위한 실험의 전기영동 사진 결과이다.
도 9는 본 발명에 따른 세균 분리 후 증균 과정을 보여주는 개략도이다.
도 10은 증균 시간에 따른 샘플의 PCR 결과(1~3: 104, 4~6: 102, 7~9: 10)이다.
도 11은 본 발명에 따른 PNA 칩을 이용한, 증균 시간에 따른 샘플의 검출 한도 평가 결과이다.
도 12는 nested PCR를 수행하여 식중독균의 검출 한계를 측정한 전기영동 결과이다.
| Target | Primer | Primer sequence (5'→3') | PCR product size (bp) |
| ITS | 16S-1387F | GCCTTGTACACWCCGCCC (서열변호 8) |
500~900 |
| 23S-200R | ACTTAGATGTTTCAGTTC (서열번호 9) |
||
| eaeA (only for E. coli O157:H7) |
eaeA-F | CAATTTTTCAGGGAATAACATTG (서열번호 10) |
120 |
| eaeA-R | AAAGTTCAGATCTTGATGACATTG (서열번호 11) |
||
| per (only for E. coli O157:H7) |
per-F | CGATGCCAATGTACTCGGAAAAATA (서열번호 12) |
120 |
| per-R | TTCGATAGGCTGGGGAAACTAGGTA (서열번호 13) |
| Lane | Strain | Lane | Strain |
| M | 100 bp ladder | ||
| 1 | 7-1 B. cereus | 13 | V. parahaemolyticus |
| 2 | 7-2 B. cereus | 14 | Y. enterocolitica-1 (ATCC 9610) |
| 3 | 4-1 L. monocytogenes | 15 | Y. enterocolitica-2 (ATCC 55075) |
| 4 | 4-2 L. monocytogenes | 16 | 3-1 Salmonella enterica |
| 5 | 4-3 L. monocytogenes | 17 | 3-2 Salmonella enterica |
| 6 | L. monocytogense (LMC ScottA) | 18 | 3-3 Salmonella enterica |
| 7 | L. monocytogense (LO 28) | 19 | E. coli O157:H7 |
| 8 | 6-1 S. aureus | 20 | 2-1 Enterobactersakazakii |
| 9 | 6-3 S. aureus | 21 | 5-1 Shigellasonnei |
| 10 | 6-11 S. aureus | 22 | 5-2 Shigellafleneri |
| 11 | C. perfringens H3 | 23 | 5-3 Shigellafleneri |
| 12 | Clostridium perfringens | N | Negative control |
Claims (13)
- 바실러스 세레우스(Bacillus cereus)와 특이적으로 결합할 수 있는 서열번호 1의 염기서열로 이루어지는 PNA 프로브; 리스테리아 모노사이토제네스(Listeria monocytogenes)와 특이적으로 결합할 수 있는 서열번호 2의 염기서열로 이루어지는 PNA 프로브; 스타필로코커스 아우레우스(Staphylococcus aureus)와 특이적으로 결합할 수 있는 서열번호 3의 염기서열로 이루어지는 PNA 프로브; 여시니아 엔테로콜리티카(Yersinia enterocolitica)와 특이적으로 결합할 수 있는 서열번호 4의 염기서열로 이루어지는 PNA 프로브; 및 살모넬라 엔테리카(Salmonella enterica)와 특이적으로 결합 수 있는 서열번호 5의 염기서열로 이루어지는 PNA 프로브를 포함하는 식중독균 검출용 PNA 프로브 세트.
- 제1항에 있어서, 서열번호 6 또는 서열번호 7의 염기서열로 이루어지는 이 콜라이(E. coli) 0157:H7와 특이적으로 결합할 수 있는 것에 특징이 있는 PNA 프로브를 추가로 포함하는, 식중독균 검출용 PNA 프로브 세트.
- 제1항 또는 제2항의 식중독균 검출용 PNA 프로브 세트를 포함하는, 식중독균 검출용 PNA 마이크로어레이 칩.
- 삭제
- 시료를 제1항 또는 제2항의 식중독균 검출용 PNA 프로브 세트와 접촉시켜 상기 시료 중 표적 서열과 식중독균 검출용 PNA 프로브 세트를 혼성화하는 단계; 및
상기 혼성화를 통해 발생하는 신호를 검출하는 단계를 포함하는,
시료 내 식중독균을 검출하는 방법. - 제5항에 있어서, 상기 식중독균 검출용 PNA 프로브 세트는 마이크로어레이 기판상에 고정화된 것을 특징으로 하는 시료 내 식중독균을 검출하는 방법.
- 제5항에 있어서, 상기 시료는 하기 단계를 순차적으로 거쳐 준비되는 것에 특징이 있는 시료 내 식중독균을 검출하는 방법:
식중독균 포함 여부가 의심되는 농작물에서 초음파처리(sonication)를 통해 식중독균을 분리하는 단계, 분리된 식중독균을 증균하는 단계, 및 상기 증균된 식중독균의 표적 유전자를 증폭하는 단계. - 제7항에 있어서, 상기 증균은 4-8시간 동안 수행되는 것에 특징이 있는 시료 내 식중독균을 검출하는 방법.
- 제7항에 있어서, 상기 증폭을 위해 Nested PCR(Nested polymerase chain reaction)을 하는 것에 특징이 있는 시료 내 식중독균을 검출하는 방법.
- 제7항에 있어서, 상기 식중독균 중 바실러스 세레우스(Bacillus cereus), 리스테리아 모노사이토제네스(Listeria monocytogenes), 스타필로코커스 아우레우스(Staphylococcus aureus), 여시니아 엔테로콜리티카(Yersinia enterocolitica), 및 살모넬라 엔테리카(Salmonella enterica)의 ITS(Internal Transcribed Spacer) 영역 증폭을 위해 서열번호 8 및 서열번호 9로 표시되는 염기서열로 이루어지는 프라이머 쌍이 사용되는 것에 특징이 있는 시료 내 식중독균을 검출하는 방법.
- 제7항에 있어서, 상기 증폭시 사용되는 정방향 프라이머: 역방향 프라이머의 양이 1: 50인 것에 특징이 있는 시료 내 식중독균을 검출하는 방법.
- 제7항에 있어서, 상기 식중독균 중 이 콜라이(E. coli) 0157:H7 eae A 유전자 증폭을 위해 서열번호 10 및 서열번호 11로 표시되는 염기서열로 이루어지는 프라이머 쌍이 사용되는 것에 특징이 있는 시료 내 식중독균을 검출하는 방법.
- 제7항에 있어서, 상기 식중독균 중 이 콜라이(E. coli) 0157:H7 per 유전자 증폭을 위해 서열번호 12 및 서열번호 13으로 표시되는 염기서열로 이루어지는 프라이머 쌍이 사용되는 것에 특징이 있는 시료 내 식중독균을 검출하는 방법.
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