KR101573896B1 - 자성 나노입자와 고점성(高粘性) 용액을 이용한 피펫 기반 병원성 단백질 및 미생물 검출방법 - Google Patents
자성 나노입자와 고점성(高粘性) 용액을 이용한 피펫 기반 병원성 단백질 및 미생물 검출방법 Download PDFInfo
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Abstract
상기와 같은 과제를 해결하기 위해서, 본 발명에 따른 방법은 병원성 물질을 포함하는 시료에 병원성 물질에 결합가능한 자성 나노입자를 투입하여 결합시키는 단계; 자성 나노입자를 분리하는 단계; 분리된 자성 나노입자를 자력을 이용하여 고점성 액체에 투과시켜 병원성 물질이 결합된 자성나노입자를 분리하는 단계; 및 분리된 병원성 물질이 결합된 자성 나노입자를 분석하는 단계를 포함하는 병원성 물질의 측정 방법을 제공한다.
본 발명에서는 고점성 유체에서 분리상으로 존재하는 자성나노입자가 결합된 병원성 물질을 피펫을 이용해서 선택적으로 분리할 수 있는 방법이 제시되었으며, 이로 인해 자성나노입자가 결합된 병원성 물질을 고점성 유체로부터 분리하는 과정에서 발생하는 오차를 줄일 수 있게 된다. 또한, 본 발명에서는 고점성 유체로부터 병원성 물질이 결합된 자성나노입자를 이용하여 신호증폭을 통해서 정량 분석의 정확도를 향상시킬 수 있는 방법이 제시되었다.
Description
도 2는 종래 마이크로튜브와 고점성 용액을 이용한 분리법과 피펫을 이용한 검출법의 비교모식도이다.
도 3은 고점성 용액을 이용한 피펫 기반 식중독균 분리 검출 장치 사진이다.
도 4은 고점성 용액을 이용한 피펫 기반 식중독균 검출법 모식도이다.
도 5는 식중독균 농도별 실제 분리 사진이다.
도 6은 식중독균 농도별 분리된 식중독균-자성 나노입자의 흡광도 (A: 최하위 15L, B: 차하위 15L, C: 차상위 15L, D: 최상위 45L) (좌), A에 대한 식중독균 농도별 흡광도 이다.
도 7은 고점성 용액을 이용한 피펫 기반 AFP 검출법 모식도이다.
도 8은 AFP 농도별 실제 분리 사진이다.
도 9는 분리된 AFP-자성 나노입자를 TMB, H2O2 용액과 섞은 직후 (좌), 10분 동안 발색시킨 결과 (우)의 사진이다.
도 10은 10분 발색 후 AFP 농도별 흡광도(흑색: 100 ng/mL, 적색: 10 ng/mL, 녹색: 1 ng/mL, 청색: 0.1 ng/mL, 하늘색: 0 ng/mL, 보라색: reference) (좌) AFP 농도별 652 nm에서의 흡광도 (우)이다.
도 11은 비교실시에 따른 원심분리와 자석을 이용한 분리후 상태를 나타내는 사진이다.
Claims (16)
- 병원성 물질을 포함하는 시료에 병원성 물질에 결합가능한 자성 나노입자를 투입하여 결합시키는 단계;
자성 나노입자를 분리하는 단계;
분리된 자성 나노입자를 자력을 이용하여 고점성 액체에 투과시켜 병원성 물질이 결합된 자성나노입자를 분리하는 단계; 및
분리된 병원성 물질이 결합된 자성 나노입자를 분석하는 단계를 포함하고,
분리된 자성나노입자가 피펫팁에 충진된 고점성 액체를 투과하면서 피펫 팁의 하부에 병원성 물질이 결합된 자성나노입자들이 분리되어 모이는 것을 특징으로 하는 병원성 물질의 측정방법. - 제1항에 있어서, 상기 병원성 물질은 병원성 미생물 또는 병원성 단백질인 것을 특징으로 하는 병원성 물질의 측정방법.
- 삭제
- 제1항에 있어서, 상기 피펫팁의 하부에 모인 병원성 물질이 결합된 자성나노입자들을 피펫을 눌러 배출하는 것을 특징으로 하는 병원성 물질의 측정 방법.
- 제1항에 있어서, 상기 병원성 물질이 결합된 자성 나노입자들을 자외선-가시광선 흡광을 이용해서 정량하는 것을 특징으로 하는 병원성 물질의 측정 방법.
- 제1항에 있어서, 상기 병원성 물질이 결합된 자성 나노입자들을 이용하여 화합물을 발색시키고, 발색된 화합물을 분석하여 병원성 물질을 정량하는 것을 특징으로 하는 병원성 물질의 측정 방법.
- 제1항에 있어서, 상기 병원성 물질은 살모넬라균, 황색포도상구균, 장염비브리오, 리스테리아균, 병원대장균, 장관출혈성 대장균 O157, 캠필로벡터균, 바실러스세레우스균, 웰슈군, 보틀루리스균으로 이루어진 그룹에서 하나 이상 선택되는 미생물인 것을 특징으로 하는 병원성 물질의 측정 방법.
- 제1항에 있어서, 상기 병원성 물질은 alpha-fetoprotein(AFP), prostate-specific antigen (PSA), IL-5, IL-6, carcinoembryonic antigen (CEA) 로 이루어진 그룹에서 하나 이상 선택되는 병원성 단백질인 것을 특징으로 하는 병원성 물질의 측정 방법.
- 제1항에 있어서, 상기 자성나노입자에는 병원성 물질에 결합될 수 있는 항체가 결합된 것을 특징으로 하는 병원성 물질의 측정 방법.
- 제1항에 있어서, 상기 고점성 액체의 점도는 물의 20~100 배인 것을 특징으로 하는 병원성물질의 측정 방법.
- 제1항에 있어서, 상기 고점성 액체는 고분자 용액인 것을 특징으로 하는 병원성 물질의 측정세균측방법.
- 제6항에 있어서, 병원성 물질이 결합된 자성나노입자를 투입하여 과산화수소의 존재하에서 3,3',5,5'-Tetramethylbenzidine (TMB)을 변색시켜 흡광도 신호를 측정하여 정량하는 것을 특징으로 하는 병원성 물질의 측정 방법.
- 피분석 물질을 포함하는 시료에 상기 피분석물질에 결합가능한 자성나노입자를 투입하여 결합시키고, 상기 자성나노입자들을 분리하는 단계;
분리된 자성나노입자들을 자석을 이용하여 피펫팁에 충진된 고점성 액체를 투과시켜, 자성나노입자들이 결합된 시료들을 피펫팁의 하부로 선택적으로 분리하는 단계; 및
피펫을 눌러서 하부에 분리된 피분석 물질이 결합된 자성나노입자들을 배출하는 단계를 포함하는 자성나노입자를 이용한 시료분석 방법.
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