KR102356510B1 - 수지상 세포 효능 분석 - Google Patents
수지상 세포 효능 분석 Download PDFInfo
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Abstract
Description
도 1a: 3 가지 신호가 최적의 DC 자극에 필요하다.
DC는 T 세포의 강력한 활성제이며 DC 및 T 세포 사이의 상호 작용을 통해 이펙터 T 세포의 특성에 영향을 미친다. 최적의 활성화를 위해 3 가지 신호가 DC에 의해 전달되어야 한다
신호 1: MHC/펩티드 및 대응 TCR을 통한 항원 제시
신호 2: CD28이 관여하는 공자극 신호 CD80/CD86의 활성화
신호 3: 활성화 사이토카인 예를 들어 IL-12의 분비 및 억제 사이토카인 예를 들어 IL-10의 부재; De Koker, 2011로부터 조정.
도 1b:
통상적인 신호 3 분석에서 DC는 인간 CD40L을 발현하는 뮤린 섬유 아세포 세포주 L929와 24 시간 동안 공배양된다. 배양 상청액으로 분비된 사이토카인 IL-12p70 및 IL-10을 상업적 샌드위치 ELISA(예를 들어 R&Dsystems)로 결정한다.
상기 분석은 방사선 유닛을 필요로 하고, 힘든 세포 배양이 수반되며, 상기 분석을 GMP 설비에서 이용하기 어렵게 만들기 때문에 불리하다. 또한, 상기 분석은 단일 세포 수준에 특이적이다.
도 2 내지 도 5: IL-10/IL-12 ELISA에서 수지상 세포의 통상적인 자극 대 CD40L 자극의 비교
도 2는 통상적인 신호 3 분석과 비교한 MDG 칵테일로 성숙되고 R848, IFN-γ 및 LPS의 상이한 조합으로 CD40L로 자극된 DC에서 IL-10/IL-12의 분비를 도시한다(IL-10/IL-12 ELISA).
도 3은 Jonuleit 성숙 DC로 수행된 같은 실험을 도시한다. 두 가지 분석 모두에서 CD40L 자극만이 이용된 경우 CD40L 자극은 IL-10에 대해서는 아니나 IL-12 분비와 관련하여 통상적인 신호 2 분석과 비교할 만한 결과를 나타낸다(IL-10/IL-12 ELISA).
도 4 및 도 5는 R848이 미성숙 DC(iDC) 및 Jonuleit 성숙 DC에서 특히 최적의 IL-10 분비를 위해 공자극 시약으로서 필요함을 나타낸다. 도 4는 IL-10/IL-12 ELISA 데이터를 도시한다. 도 5는 본 발명의 방법에 의해 수행된 데이터를 도시한다(ELISPOT Sig.3 CD40L)
도 6 내지 도 8: 유동 세포 분석이 아닌 이중 색상 IL-10/IL-12 ELISPOT은 ELISA와 비교할 만한 수지상 세포의 효능을 나타낸다
도 6은 IL-12 및 IL-10에 대한 2 개의 상이한 도너의 ELISPOT 데이터를 도시한다. 자극은 R848과 함께 20000 개의 세포 및 1 μl CD40L/100 μl([v/v]) 배지로 수행되었다. 도너 1은 IL-10을 많이 생산한 반면, 도너 2는 주로 IL-12를 생산한다.
도 7은 통상적인 신호 3 분석에서 같은 도너를 도시한다. 두 가지 분석 모두는 매우 비교할 만한 결과를 나타낸다. dc IL-10/IL-12 ELISPOT과는 대조적으로, 세포 내 IL-12 및 IL-10의 유동 세포 분석은 IL-10에 대해서는 아니나 IL-12 분비 데이터에 대해서만 비교할 만한 데이터를 보여줄 수 있다. 이는 세포 내 IL-10 저장에 기인할 것이다.
도 8은 같은 도너 세포의 IL-12 및 IL-10의 ELISA 또는 상응하는 세포 내 유동 세포 분석(FACS) 염색으로 검출된 통상적인 신호 3 분석 후에 IL-12 및 IL-10 분비 비교를 도시한다. FACS로 검출된 바와 같은 세포 내 염색 결과는 특히 IL-10과 관련하여, ELISA로 검출된 바와 같은 분비에 필적하지 못한다. 이는 FACS는 세포 내에 저장된 총 IL-10을 측정하는 반면 ELISA는 분비된 IL-10을 검출한다는 사실로 설명될 수 있다.
도 9 단일 세포 IL-10/IL-12 분석(ELISPOT) 상단 열에서 첫 번째 그림은 IL12를 생산하는 성숙 수지상 세포(발명자의 칵테일로 성숙)의 스팟 수, 두 번째 그림은 같은 웰에서 IL-10을 생산하는 세포의 스팟 수, 세 번째 그림은 이중 양성인 세포의 스팟 수를 나타낸다. 하단 두 번째 열에서, 미성숙 수지상 세포에 대한 각각의 데이터가 도시된다(인간 IL-10/IL-12 이중-색상 ELISPOT 키트(CTL); 세포 수: 20,000 개의 세포/웰, 1.1 μl/110 μl CD40L+R848). 상기 결과는 미성숙 DC(iDC)가 건강한 도너에서 IL-10의 주요 공급원임을 명백하게 보여준다.
Claims (28)
- 수지상 세포(dendritic cell; DC)의 효능을 결정하는 방법으로서,
(a) 가용성 CD40L 및 TLR7/8 작용제(agonist)와 인큐베이션하여 수지상 세포를 자극하는 단계;
(b) 단계 (a)의 상기 수지상 세포로부터 마커 단백질 IL-10 및 IL-12의 분비를 측정하는 단계 - 여기에서, 상기 측정은 단일 세포 수준에서 수행됨 - ; 및
(c) 상기 IL-12 및 IL-10의 분비 프로파일에 기초하여 상기 수지상 세포 효능을 분류하는 단계 - 여기에서 IL-12 대 IL-10 분비의 비율이 1 이상을 나타내는 수지상 세포는 T-세포 및 자연살해(Natural Killer, NK) 세포를 활성화시키는 능력이 큰 수지상 세포로 분류됨 - ;
를 포함하는 것을 특징으로 하는, 방법. - 제 1 항에 있어서,
상기 TLR7/8 작용제는 4-아미노-2-에톡시메틸-α,α-디메틸-1H-이미다졸[4,5-c]퀴놀린-1-에탄올(R848)인 것을 특징으로 하는, 방법. - 제 2 항에 있어서,
T-세포 및 NK 세포를 활성화시키는 능력이 큰 상기 수지상 세포는 CD80의 고 발현 수준, CD86의 고 발현 수준, CD14의 저 발현 수준 및 B7H1의 저 발현 수준 표현형을 갖는 것을 특징으로 하는, 방법. - 제 3 항에 있어서,
T-세포를 활성화시키는 능력이 큰 상기 수지상 세포는 T 세포를 Th1/Tc1 표현형으로 분극시키는 것을 특징으로 하는, 방법. - 제 4 항에 있어서,
상기 Th1/Tc1 표현형은 상기 T 세포에 의한 IFNγ의 분비 및 IL-4의 발현이 없거나 감소된 것을 특징으로 하는, 방법. - 제 5 항에 있어서,
NK 세포를 활성화시키는 능력이 큰 상기 수지상 세포는 NK 세포를 활성화시켜 CD69를 높은 수준으로 발현하고 IFNγ를 분비하게 하는 것을 특징으로 하는, 방법. - 제 1 항에 있어서,
상기 단계 (b)는
i) IL-10에 대한 1 차 결합 단백질 및 IL-12에 특이적인 1 차 결합 단백질과 상기 수지상 세포를 인큐베이션하는 단계;
ii) 2 차 결합 단백질에 의해 상기 1 차 결합 단백질에 대한 상기 마커 단백질의 결합을 검출하는 단계;
를 포함하는 것을 특징으로 하는, 방법. - 제 7 항에 있어서,
상기 자극은 상기 수지상 세포에 가용성 CD40L 및 TLR7/8 작용제의 결합에 의해서만 발생하는 것을 특징으로 하는, 방법. - 제 8 항에 있어서,
CD40L은 세포주에 의해 상기 수지상 세포에 제시되지 않는 것을 특징으로 하는, 방법. - 제 9 항에 있어서,
상기 수지상 세포는 상이한 세포주와 공배양되지 않는 것을 특징으로 하는, 방법. - 제 10 항에 있어서,
방사선 단계가 적용되지 않는 것을 특징으로 하는, 방법. - 제 11 항에 있어서,
상기 1 차 결합 단백질은 항체인 것을 특징으로 하는, 방법. - 제 12 항에 있어서,
상기 2 차 결합 단백질은 항체인 것을 특징으로 하는, 방법. - 제 13 항에 있어서,
상기 2 차 결합 단백질은 형광 표지된 것을 특징으로 하는, 방법. - 제 14 항에 있어서,
상기 수지상 세포는 성숙 수지상 세포인 것을 특징으로 하는, 방법. - 제 15 항에 있어서,
상기 수지상 세포의 성숙은 성숙 칵테일과 인큐베이션하여 발생하는 것을 특징으로 하는, 방법. - 삭제
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