KR102080554B1 - 세포의 자성 비드 부착을 통한 자성 기반 바이오 패닝 방법 - Google Patents
세포의 자성 비드 부착을 통한 자성 기반 바이오 패닝 방법 Download PDFInfo
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- KR102080554B1 KR102080554B1 KR1020190049051A KR20190049051A KR102080554B1 KR 102080554 B1 KR102080554 B1 KR 102080554B1 KR 1020190049051 A KR1020190049051 A KR 1020190049051A KR 20190049051 A KR20190049051 A KR 20190049051A KR 102080554 B1 KR102080554 B1 KR 102080554B1
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Abstract
Description
도 2의 (A)는 본 발명의 일 실시예에서 이용한 DHPE-FITC의 화학식을 나타낸 것이고, (B)는 상기 물질의 개략도를 나타낸 것이며, (C)는 FACS로 본 발명의 일실시예에 따른 세포를 분리하는 과정을 나타낸 모사도이다.
도 3의 (A)는 본 발명의 일 실시예에 따른 세포막 유사물질이 포함된 세포에서 반응 시간(30min, 60min) 및 에 따른 형광 세기를 측정한 결과이며, (B)는 상기 (A)의 세포가 6시간이 지나도 세포막 유사물질을 포함하고 있음을 확인한 결과이다.
도 4의 (A)는 본 발명의 일 실시예에서 이용한 B-X-DHPE의 화학식을 나타낸 것이고, (B)는 상기 물질의 개략도를 나타낸 것이며, (C)는 FACS로 본 발명의 일실시예에 따른 세포를 분리하는 과정을 나타낸 모사도이다.
도 5의 (A)는 본 발명의 일 실시예에 따른 세포막 유사물질이 포함된 세포에서 유사물질의 농도에 따른 결합효율을 측정한 것이며, (B)는 상기 물질의 농도 및 반응온도에 따른 결합 효율을 측정한 결과이다.
도 6의 (A)는 세포막 유사물질의 융합 유무에 따른 세포막 표면 단백질의 발현량을 측정한 결과이며, (B)는 세포막에 세포막 유사물질이 결합한 경우를 나타낸 개략도이다.
도 7의 (A)는 본 발명의 일 실시예에 따른 인지질-바이오틴-스트렙타비딘-자성 비드 복합체와 세포의 융합 방식을 나타낸 개략도이며, (B)는 상기 두 방식의 융합 효율을 관찰한 결과이다.
도 8은 본 발명의 일 실시예에 따른 자성 비드의 부착률을 배양 배지 조건에 따라 측정한 결과이다.
도 9는 본 발명의 일 실시에 따른 세포의 인지질-바이오틴-스트렙타비딘-자성 비드 복합체 형성 효율을 측정한 결과이다.
도 10은 자성기반 자동화 세포 패닝 장치의 개략도 및 운전 단계를 나타낸 것이다.
도 11은 본 발명의 일 실시예에 따른 자성을 가지는 비드를 이용한 자동화 시스템에서의 세포 패닝 단계를 나타낸 것이다.
도 12는 본 발명의 일 실시예에 따른 세포의 인지질-바이오틴-스트렙타비딘-자성 비드 복합체 형성 후, 자성 기반기기에 적용하여 자동 패닝을 하였을 때 최종 단계 후 남은 세포 수를 수동 패닝방법과 비교한 결과이다.
도13의 (A)는 자성기반 기기를 이용한 자성 부착 비드 세포 패닝에 필요한 reagent를 정리한 것이고, (B)는 자성기반 기기를 이용한 자성 부착 비드 세포 패닝 프로토콜(BindIt Software 3.3.1 for KingFisher Instruments)을 정리한 것이다.
도14의 (A)는. 자성기반 기기를 이용한 특정 항원 과발현 환자유래세포 자동 패닝 결과로서, 항원 고정 방식을 통한 바이오 패닝 결과물을 이용하였으며 강력한 세척조건과 가벼운 세척조건에서의 결과를 의미하며, (B)는 자성기반 기기를 이용한 특정 항원 과발현 환자유래세포 자동 패닝 결과로서, 자성 비드 부착 항원을 통한 자동 바이오 패닝 결과물 이용하였으며, 가벼운 세척조건에서의 결과를 의미한다.
도15의 (A)는. 자동 패닝 결과물을 이용한 특정 항원 특이적 결합능을 지닌 ELISA 기반 항체 스크리닝 결과로서, 항원 고정 방식을 통한 바이오 패닝 결과물을 이용하였으며, 강력한 세척조건과 가벼운 세척조건에서의 결과를 의미하며, (B)는 자동 패닝 결과물을 이용한 특정 항원 특이적 결합능을 지닌 ELISA 기반 항체 스크리닝 결과로서, 자성 비드 부착 항원을 통한 자동 바이오 패닝 결과물을 이용하였으며, 가벼운 세척조건에서의 결과를 의미한다.
도16은 선별된 항체의 ELISA 수치 비교결과로서, Positive/Negative 재조합 단백질에 대한 상대값을 그래프로 나타낸 것이다.
Claims (10)
- 다음 단계를 포함하는, 항원 단백질에 결합하는 항체 또는 그의 항원 결합 단편을 스크리닝하는 방법:
(i) 세포막에 바이오티닐화된 인지질이 삽입되고, 상기 바이오티닐화된 인지질과 스트렙타비딘-자성 비드 복합체가 결합되어 있는 항원 단백질 과발현 세포를 준비하는 단계;
(ii) 상기 세포에 항체 또는 그의 항원 결합 단편을 포함하는 라이브러리를 처리하고, 자성기반 시스템으로 항원 단백질에 결합하는 항체 또는 그의 항원 결합 단편을 스크리닝하는 단계;
(iii) 상기 스크리닝된 항체 또는 그의 항원 결합 단편 라이브러리를 항원 단백질이 발현되지 않은 세포와 반응시켜 항원 단백질에 특이적으로 결합하는 항체 또는 그의 항원 결합 단편만을 선별하는 단계; 및
(iv) 상기 선별된 항체 또는 그의 항원 결합 단편 중에서 항원 단백질 이외의 항원에 결합하는 항체 또는 그의 항원 결합 단편을 분리제거하는 단계.
- 제1항에 있어서, 상기 인지질은 PE(PHospHoethanolamine) 계열의 인지질, PA(PHospHatidic acid) 계열의 인지질, PG(PHospHatidylglycerol) 계열의 인지질, PS(PHospHatidylserine) 계열의 인지질, PI(PHospHatidylinositol) 계열의 인지질, 스핑고 지질(spHingolipid) 계열의 인지질 및 스테롤(sterol) 계열의 인지질로 구성된 군으로부터 선택되는 어느 하나인 것을 특징으로 하는 방법.
- 제2항에 있어서, 상기 인지질은 DHPE(1,2-dihexadecanoyl-sn-glycero-3-pHospHoethanolamine), Fluorescein DHPE (N-(Fluoresceine-5-Thiocarbamoyl)-1-2-dihexadecanoyl-sn-glycero-3-pHospHoethanolamine), B-X DHPE(N-((6-(Biotinoyl)amino)hexanoyl)-1-2--dihexadecanoyl-sn-glycero-3-pHospHoethanolamine) Biotin PE(1-oleoyl-2-(12-biotinyl(aminododecanoyl))-sn-glycero-3-phosphoethanolamine), Biotin PS(1-oleoyl-2-(12-biotinyl(aminododecanoyl))-sn-glycero-3-phospho-L-serine (ammonium salt)) 및 Biotin PC(1-oleoyl-2-[12-biotinyl(aminododecanoyl)]-sn-glycero-3-phosphocholine) 로 구성된 군으로부터 선택되는 어느 하나인 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 세포막에 바이오티닐화된 인지질이 삽입되고, 상기 바이오티닐화된 인지질과 스트렙타비딘-자성 비드 복합체가 결합되어 있는 항원 단백질 과발현 세포는,
(a) 바이오티닐화된 인지질 존재 하에 항원 단백질 과발현 세포를 배양하여 세포막에 바이오티닐화된 인지질이 삽입된 세포를 수득하는 단계; 및
(b) 상기 수득된 세포의 바이오티닐화된 인지질에 스트렙타비딘-자성 비드 복합체를 처리하여 세포막에 바이오티닐화된 인지질이 삽입되고, 상기 바이오티닐화된 인지질과 스트렙타비딘-자성 비드 복합체가 결합되어 있는 항원 단백질 과발현 세포를 수득하는 단계를 통해 제조된 것임을 특징으로 하는 방법.
- 제1항에 있어서, 상기 세포막에 바이오티닐화된 인지질이 삽입되고, 상기 바이오티닐화된 인지질과 스트렙타비딘-자성 비드 복합체가 결합되어 있는 항원 단백질 과발현 세포는,
(a) 바이오티닐화된 인지질과 스트렙타비딘-자성 비드를 반응시켜, 인지질-바이오틴-스트렙타비딘-자성 비드 복합체를 준비하는 단계; 및
(b) 상기 인지질-바이오틴-스트렙타비딘-자성비드 복합체를 항원 단백질이 과발현된 세포에 융합시켜, 세포막에 바이오티닐화된 인지질이 삽입되고, 상기 바이오티닐화된 인지질과 스트렙타비딘-자성 비드 복합체가 결합되어 있는 항원 단백질 과발현 세포를 수득하는 단계를 통해 제조된 것임을 특징으로 하는 방법.
- 제1항에 있어서, 상기 세포는 계면활성제를 포함하는 배지에서 스트렙타비딘-자성 비드 복합체를 융합시키는 것을 특징으로 하는 방법
- 제6항에 있어서, 상기 계면활성제는 알킬 폴리글리코사이드(alkyl polyglycoside), 세틸 알코올(cetyl alcohol), 데실 글루코사이드(Decyl glucoside), 데실 폴리글루코사이드(Decyl polyglucoside), 말토사이드(Maltosides), NP-40, 올레일 알코올(Oleyl alcohol), 폴록사머(Poloxamer), 폴리소르베이트(Polysorbate), 소비탄(Sorbitan), 트리톤 X-100(Triton X-100) 및 트윈 80(Tween 80)로 구성된 군에서 선택되는 어느 하나인 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 자성기반 시스템은 자성을 이용하여 세포를 분리하는 장치인 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 항체 또는 그의 항원 결합 단편은 세포 내로 내재화되는 항체 또는 그의 항원 결합 단편인 것을 특징으로 하는 방법.
- 제1항에 있어서, 상기 방법에 의해 선별된 항체 또는 그의 항원 결합 단편으로부터 IgG를 제작하는 단계를 추가로 포함하는 것을 특징으로 하는 방법.
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