KR20190141218A - 사용 준비된 냉동보존 세포 - Google Patents
사용 준비된 냉동보존 세포 Download PDFInfo
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Abstract
Description
도 2a 내지 2m은 냉동휴면 세포의 유도된 분화의 동력학 및 정도를 보여준다. (2a 및 2l) 신경 유도 동안 유세포분석에 의해 정량된 OCT4 및 PAX6 발현(n=5; 평균 ± SD로서 표시된 독립적인 생물학적 복제물에 대한 값). (2b 및 2c) 신경 유도 후 0일째 날, 3일째 날, 6일째 날 및 9일째 날 대표적인 유세포분석(2b) 및 면역형광(2c). (2d) 중내배엽 유도 동안 유세포분석에 의해 정량된 OCT4 및 Brachyury 발현(n=3; 평균 ± SD로서 표시된 독립적인 생물학적 복제물에 대한 값). 중내배엽 유도 후 0일째 날, 1일째 날, 2일째 날 및 4일째 날 대표적인 유세포분석(2e, 2k) 및 면역형광(2f). (2g) 1백만, 5백만, 1천만, 2천만 및 3천만 개 세포/㎖로 냉동될 때 해동 후 냉동휴면 세포의 생존율. 아크리딘 오랜지(생존) 및 요오드화프로피듐(사멸) 형광을 이용하여 자동화된 세포 카운터에서 생존 세포의 퍼센트를 측정하였다(n=3; 평균 ± SD로서 표시된 독립적인 생물학적 복제물에 대한 값). (2h, 2m) 셀 팩토리(Cell Factory)에서 증폭된 대조군 및 냉동휴면 세포에서 유세포분석에 의해 측정된 줄기 세포 마커 발현(또는 자연발생적 분화, SSEA-1)(n=3; 2h에서 평균 ± SD로서 표시된 독립적인 생물학적 복제물에 대한 값, 2m에서 대표적인 예). (2i) 냉동휴면 세포의 중뇌 도파민 뉴런 분화 후 21일째 날 FOXA2(적색) 및 TH(녹색) 발현. 축적 막대 = 100 ㎛. (2j) 대조군 및 냉동휴면 WA09 hESC의 유전자 발현 및 중뇌 도파민 뉴런. 샘플을 WA09 hES 대조군 세포로 표준화하였고, 발현의 배수 변화를 색채로 코딩하였다. 대조군 hES에 비해 더 높은 발현 수준은 적색으로 표시되어 있고, 더 낮은 수준은 청색으로 표시되어 있다. (2a), (2d), (2g) 및 (2h)에서, 적어도 3회의 독립적인 실험을 이용하여 윌콕신 부호 순위 검정을 수행하였고, 대조군과 냉동휴면 사이에 통계학적 차이는 발견되지 않았다(p>0.05).
도 3a 내지 3e. 냉동휴면 세포의 유전적 변형. (a 및 b) GFP 플라스미드로 핵감염시킨 지 24시간 후 대조군 및 냉동휴면 세포에서 GFP 발현의 대표적인 면역형광(a) 및 유세포분석(b). (c) GFP 플라스미드로 핵감염시킨 지 24시간 후 대조군 및 냉동휴면 세포에서 유세포분석에 의해 정량된 GFP 발현(n=3; 평균 ± SD로서 표시된 독립적인 생물학적 복제물에 대한 값). (d) EmGFP를 함유하는 센다이(Sendai) 바이러스 벡터를 사용한 형질도입 후 냉동휴면 세포에서 GFP 발현의 대표적인 면역형광. 초기 형질도입으로부터의 개별 서브클론은 적어도 10회 계대배양 동안 GFP+ 콜로니로서 유지될 수 있다. (e) 냉동휴면 WA01 iCRISPR 세포에서 HPRT 가이드 RNA와 함께 게놈 절단 검출 키트를 사용한 후 절단 생성물의 아가로스 겔 분석. + 또는 -는 (+) 검출 효소의 존재 및 부재(-)를 표시한다. (1) 양성 대조군; (2) 가이드 RNA 없이 냉동휴면 전에 유도된 Cas9를 가진 iCRISPR 세포; (3) Cas9 유도를 갖지 않되 HPRT 가이드 RNA를 가진 iCRISPR 세포; (4) Cas9 유도 및 HPRT 가이드 RNA를 가진 iCRISPR 세포; (5) Cas9 유도 및 HPRT 가이드 RNA를 가진 iCRISPR 세포(냉동휴면 없음). (c)에서, 3회의 독립적인 실험을 이용하여 윌콕신 부호 순위 검정을 수행하였고, 대조군과 냉동휴면 사이에 통계학적 차이는 발견되지 않았다(p>0.05).
도 4a 내지 4c는 냉동휴면 세포의 유전적 변형을 보여준다. 대조군 및 냉동휴면 세포에서 GFP 플라스미드로 핵감염시킨 지 24시간 및 48시간 후 유세포분석(4a) 또는 형광 현미경관찰(4b)에 의한 GFP 발현. (4c) 효소의 존재(레인 1) 및 부재(레인 2) 하에서 진아트(GeneArt) 게놈 절단 검출 키트 양성 대조군. 효소의 존재(레인 3) 및 부재(레인 4) 하에서 핵감염 동안 가이드 RNA 없이 Dox를 냉동휴면 전 세포에 첨가하였다. 효소의 존재(레인 5) 및 부재(레인 6) 하에서 핵감염 동안 Dox를 냉동휴면 전 세포에 첨가하지 않았으나, HPRT 가이드 RNA를 제공하였다. 세포는 효소의 존재(레인 7) 및 부재(레인 8) 하에서 냉동휴면 전에 Dox를 제공받았고 해동 후 HPRT 가이드 RNA를 제공받았다. 효소의 존재(레인 9) 및 부재(레인 10) 하에서 Dox 및 HPRT 가이드 RNA를 제공받은(그러나, 결코 냉동되지 않은) 신선한 대조군 세포.
도 5a 내지 5f는 냉동보존 조건이 변경된 냉동휴면 세포의 생존율을 보여준다. 도 1과 관련된다. 아크리딘 오랜지(생존) 및 요오드화프로피듐(사멸) 형광을 이용하여 자동화된 세포 카운터에서 생존율을 측정하였다. (5a) WA09, 960.1B, 153.3A 및 WA01 iCRISPR 세포주에서 냉동휴면 세포 및 대조군 세포의 퍼센트 생존율. (5b) FreSR-S 또는 PSC 냉동보존 키트에서 제어된 속도 냉동기 또는 보편적인 냉동을 이용할 때 냉동휴면 WA09 세포의 해동 후 생존율. (5c) 제어된 속도 냉동기 또는 보편적인 냉동을 이용할 때 냉동휴면 WA09 세포의 해동 후 생존율(방법 참조). (5d) 피더 부재(Geltrex™) 또는 피더 기반 조건에서 생장된 냉동휴면 WA09 세포의 해동 후 생존율. "CRF"는 제어된 속도 냉동기의 이용을 표시하는 반면, "-80"은 액체 질소 탱크로 옮기기 전에 24시간 동안 -80℃에서 세포 냉동 용기에서 바이알을 저장하였다는 것을 표시한다. DMSO는 냉동매질로서 10% DMSO를 사용하였다는 것을 표시한다. 세포는 제어된 속도 냉동기 또는 보편적인 냉동을 이용함으로써 냉동휴면된다. (5e) 대조군 또는 1년에 걸쳐 냉동된 냉동휴면 세포에서 유세포분석에 의한 줄기 세포 마커 발현(또는 자연발생적 분화, SSEA-1). (5f) 대조군 및 냉동휴면 WA09 hESC를 사용하였을 때 기형종 성장률.
도 6은 냉동보존 세포를 제조하고 사용하는 데 있어서 전통적인 방법 및 냉동휴면 방법의 계략적 예시이다.
도 7은 보편적인 PSC 배양에 비해 냉동휴면 방법의 상이한 계략적 예시이다. (위) 보편적인 (대조군) 워크플로우(workflow)는 냉동보존으로부터 콜로니를 회수하고, 특정 적용, 예컨대, 관심 있는 유형의 세포로의 유도된 분화를 위해 배양물의 일부를 주기적으로 사용하여 상기 콜로니를 장시간에 걸쳐 증폭한다. 시간의 경과에 따라, PSC는 유전적 변화, 오염, 또는 자연발생적 분화의 양의 변화를 획득할 것이고, 이들 모두가 결과에 영향을 미칠 수 있다. (아래) 냉동휴면은 가능한 최소한의 수의 계대배양에 걸쳐 PSC의 큰 풀을 증폭한다. 그 다음, 냉동보존 전에 큰 회분을 단일 세포 현탁액으로 해리시킨다. 냉동 과정은 PSC의 생성을 그의 사용으로부터 분리함으로써, 각각의 보존물의 적절한 품질 관리 및 특징규명을 수행할 시간을 허용한다. 상기 과정은 다수의 실험들에서 동일한 세포의 사용도 허용하고, 다른 실험실이 PSC의 정확히 동일한 출발 집단으로 독립적인 실험을 시작할 수 있도록 전 세계 어디로든 운반될 수 있게 한다.
도 8a 내지 8c는 신선한 비냉동 대조군 WA09 세포에 비해 유전적으로 변형된 냉동휴면 WA09 인간 배아 줄기 세포의 집단에 의해 발현된 구축물의 발현 수준 분포를 보여준다. (8a) 유세포분석에 의해 측정될 때, 냉동휴면되고 해동시 3.4 kb GFP 플라스미드로 핵감염된 WA09 줄기 세포(청색 그래프, a), GFP 벡터로 핵감염된 신선한 비냉동 대조군 WA09 세포(적색 그래프, b) 및 핵감염되지 않은 WA09 세포(녹색 그래프, c)의 집단에서 GFP 발현 수준의 분포. (8b) 유세포분석에 의해 측정될 때, 냉동휴면되고 해동시 mCherry를 발현하는 9.3 kb CRISPR/CAS9 플라스미드로 핵감염된 WA09 줄기 세포, 및 mCherry CRISPR/CAS9 플라스미드로 핵감염된 신선한 비냉동 대조군 WA09 세포의 집단에서 mCherry 발현 수준의 분포. 세포를 2.5 ㎍, 5 ㎍, 7.5 ㎍, 10 ㎍ 또는 12.5 ㎍의 플라스미드로 핵감염시켰다. (8c) 2.5 ㎍, 5 ㎍, 7.5 ㎍, 10 ㎍ 또는 12.5 ㎍의 플라스미드를 사용한 핵감염 후 mCherry를 발현하는 냉동휴면 세포 및 신선한 비냉동 대조군 세포의 퍼센트. 제2 핵감염 용액인 HSC2도 냉동휴면 조건 및 신선한 비냉동 조건 하에서 2.5 ㎍의 플라스미드로 시험하였고 mCherry 발현에 대해 분석하였다.
Claims (39)
- 해리된 세포의 냉동 집단 및 냉동보존 배지를 포함하는 조성물로서,
상기 냉동 집단 중의 세포의 농도는 적어도 약 1백만 개 세포/㎖인 조성물. - 해리된 세포의 냉동 집단 및 냉동보존 배지를 해동시킴으로써 수득된 세포를 형질감염시킴으로써 제조된, 이종 핵산으로 형질감염된 세포를 포함하는 조성물로서,
상기 냉동 집단 중의 세포의 농도는 적어도 약 1백만 개 세포/㎖인 조성물. - 청구항 1 또는 청구항 2에 있어서,
상기 냉동 집단 중의 세포의 농도는 적어도 약 5백만 개 세포/㎖인 조성물. - 청구항 1 내지 청구항 3 중 어느 한 항에 있어서,
상기 냉동 집단 중의 세포의 농도는 적어도 약 3천만 개 세포/㎖인 조성물. - 청구항 1 내지 청구항 4 중 어느 한 항에 있어서,
상기 냉동 집단 중의 세포의 농도는 적어도 약 5천만 개 세포/㎖인 조성물. - 청구항 1 내지 청구항 5 중 어느 한 항에 있어서,
상기 세포는 포유동물 세포인 조성물. - 청구항 6에 있어서,
상기 포유동물 세포는 분화다능 줄기 세포(PSC)인 조성물. - 청구항 7에 있어서,
상기 분화다능 줄기 세포는 유도된 분화다능 줄기 세포(iPSC) 또는 배아 줄기 세포(ESC)인 조성물. - 배양 배지에서 배양된 세포의 집단을 해리시키는 단계;
상기 해리된 세포를 냉동보존 배지에 현탁하여 세포 현탁액을 형성하는 단계; 및
상기 세포 현탁액을 냉동시켜 냉동된 세포의 조성물을 형성하는 단계;를 포함하는 냉동 세포를 포함하는 조성물의 제조 방법으로서,
상기 냉동 세포의 조성물은 적어도 약 1백만 개 세포/㎖의 농도를 갖는 것인 방법. - (i) 배양 배지에서 배양된 세포의 집단을 해리시키는 단계; 상기 해리된 세포를 냉동보존 배지에 현탁하여 세포 현탁액을 형성하는 단계; 및 상기 세포 현탁액을 냉동시켜 냉동 세포의 조성물을 형성하는 단계;를 포함하는 방법에 의해 냉동 세포를 포함하는 조성물을 제조하는 단계로서, 상기 냉동 세포의 조성물은 적어도 약 1백만 개 세포/㎖의 농도를 갖는 것인 단계; 및
(ii) (i)의 조성물로부터의 세포를 이종 핵산으로 형질감염시키는 단계;를 포함하는 형질감염된 세포의 제조 방법. - 청구항 9 또는 청구항 10에 있어서,
세포의 집단을 해리시키는 단계는 상기 세포의 집단을 유효량의 세포 해리 용액에 노출시키는 단계를 추가로 포함하는 방법. - 청구항 11에 있어서,
상기 세포 해리 용액은 효소 무함유 세포 해리 용액 및 효소 함유 용액으로 이루어진 군으로부터 선택되는 방법. - 청구항 12에 있어서,
상기 효소 함유 세포 해리 용액은 하나 이상의 효소를 포함하는 방법. - 청구항 13에 있어서,
상기 효소는 콜라게나제, 프로테아제, 트립신, 파파인, 히알루로니다제 및 DNase로 이루어진 군으로부터 선택되는 방법. - 청구항 12에 있어서,
상기 효소 무함유 세포 해리 용액은 하나 이상의 킬레이팅제를 포함하는 방법. - 청구항 15에 있어서,
상기 킬레이팅제는 EDTA인 방법. - 청구항 9 내지 청구항 16 중 어느 한 항에 있어서,
상기 배양 배지는 피더(feeder) 무함유 배지인 방법. - 청구항 9 내지 청구항 17 중 어느 한 항에 있어서,
상기 조성물 중의 냉동 세포의 농도는 적어도 약 5백만 개 세포/㎖인 방법. - 청구항 9 내지 청구항 18 중 어느 한 항에 있어서,
상기 조성물 중의 냉동 세포의 농도는 적어도 약 3천만 개 세포/㎖인 방법. - 청구항 9 내지 청구항 19 중 어느 한 항에 있어서,
상기 세포는 포유동물 세포인 방법. - 청구항 20에 있어서,
상기 포유동물 세포는 PSC 또는 ESC인 방법. - 청구항 21에 있어서,
상기 PSC는 iPSC인 방법. - 해리된 세포의 집단 및 냉동보존 배지를 포함하는 냉동 세포의 조성물을 해동시키는 단계; 및
상기 세포를 다운스트림 처리로 처리하는 단계;를 포함하는 시험관내에서 세포를 배양하는 방법으로서,
상기 세포는 다운스트림 처리 전에 기하급수적으로 증폭되지 않는 것인 방법. - 청구항 23에 있어서,
상기 냉동 세포의 조성물은 적어도 약 1백만 개 세포/㎖의 농도를 갖는 방법. - 청구항 23 또는 청구항 24에 있어서,
상기 냉동 세포의 조성물은 적어도 약 5백만 개 세포/㎖의 농도를 갖는 방법. - 청구항 23 내지 청구항 25 중 어느 한 항에 있어서,
상기 냉동 세포의 조성물은 적어도 약 3천만 개 세포/㎖의 농도를 갖는 방법. - 청구항 23 내지 청구항 26 중 어느 한 항에 있어서,
상기 세포는 포유동물 세포인 방법. - 청구항 27에 있어서,
상기 포유동물 세포는 PSC 또는 ESC인 방법. - 청구항 28에 있어서,
상기 PSC는 iPSC인 방법. - 청구항 23 내지 청구항 29 중 어느 한 항에 있어서,
상기 다운스트림 처리는 상기 세포를 시험관내에서 분화시키는 방법을 포함하는 방법. - 청구항 30에 있어서,
상기 세포는 복수의 도파민 생성 전구체 세포로 분화되는 방법. - 청구항 31에 있어서,
상기 도파민 생성 전구체 세포는 검출가능한 수준의 포크헤드 박스 단백질 A2(FOXA2), LIM 호메오박스 전사 인자 1 알파(LMX1A), 티로신 하이드록실라제(TH) 또는 이들의 조합을 발현하는 방법. - 청구항 29 내지 청구항 32 중 어느 한 항에 있어서,
상기 iPSC는 신경퇴행성 질환으로 진단받은 대상체로부터 유래되는 방법. - 청구항 33에 있어서,
상기 신경퇴행성 질환은 파킨슨병인 방법. - 청구항 1 내지 청구항 8 중 어느 한 항에 있어서,
상기 해리된 세포의 집단은 외생성 핵산을 발현하고, 상기 발현의 수준은 냉동되지 않은 세포의 집단에 의한 외생성 핵산의 발현 수준보다 더 큰 것인 조성물. - 청구항 35에 있어서,
상기 해리된 세포의 집단의 발현 수준은 냉동되지 않은 세포의 집단의 발현 수준보다 적어도 약 2배 더 큰 것인 조성물. - 청구항 35 또는 청구항 36에 있어서,
상기 해리된 세포의 집단의 발현 수준은 냉동되지 않은 세포의 집단의 발현 수준보다 적어도 약 5% 더 큰 것인 조성물. - 청구항 9 내지 청구항 34 중 어느 한 항에 있어서,
핵산을 냉동된 세포의 집단 내로 도입하는 단계를 추가로 포함하는 방법. - 청구항 38에 있어서,
상기 핵산은 형질감염 또는 핵감염에 의해 도입되는 방법.
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