JP6995624B2 - 修正ガンマデルタt細胞およびその使用 - Google Patents
修正ガンマデルタt細胞およびその使用 Download PDFInfo
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Description
(i)1つもしくは複数の共刺激性シグナル伝達領域および非機能性CD3ゼータ活性化/シグナル伝達ドメイン(調整可能CAR)、または
(ii)CD3ゼータ活性化/シグナル伝達ドメイン、または
(iii)1つもしくは複数の共刺激性シグナル伝達領域および機能性CD3ゼータ活性化/シグナル伝達ドメインを含む。
(i)1つもしくは複数の共刺激性シグナル伝達領域および非機能性CD3ゼータ活性化ドメイン、または
(ii)CD3ゼータ活性化ドメイン、または
(iii)1つもしくは複数の共刺激性シグナル伝達領域およびCD3ゼータ活性化ドメインを含む。
本発明の第2態様の実施形態において、調整可能/共刺激性CARまたは伝統的なCARを発現したγδT細胞を、ウイルス感染症、細菌感染症、真菌感染症、原虫感染症、またはがんなどの疾病を処置するために患者に投与することが可能である。
-第1対象からガンマデルタT細胞のサンプルを提供するステップと:
-前記ガンマデルタT細胞を培養して、それを第2対象に投与するステップであって、前記ガンマデルタT細胞はCAR修正ガンマデルタT細胞を提供するように修正されている、ステップとを含む、第2対象にガンマデルタT細胞を同種的に提供するプロセスを提供する。
-第1の対象(ドナー)から、血液、例えば、臍帯血、または除去療法/白血球除去療法由来の細胞を提供するステップと、
-前記血液から末梢血単核細胞を分離するステップと、
-アミノビスフォスフォネートおよび標的抗原を前記末梢血単核細胞に加えるステップと、
-前記末梢血単核細胞を培養して標的抗原特異性細胞毒性T細胞(CTL)およびガンマデルタT細胞を増殖/誘発するステップと、
-前記ガンマデルタT細胞を修正して、本明細書で論じるCAR修正ガンマデルタT細胞を提供し、任意選択的に、PBMCまたはCBMCまたはT細胞を人工抗原提示細胞(aAPC)と共に共培養して標的抗原特異性細胞毒性T細胞(CTL)およびガンマデルタT細胞を増殖/誘発するステップのうち1つまたは複数を含み得る。
-対象由来のガンマデルタT細胞のサンプルを提供するステップと;
-前記ガンマデルタT細胞を培養してそれらを前記対象に再び投与するステップであって、前記培養ステップは前記ガンマデルタT細胞を修正してCAR修正ガンマデルタT細胞、好適には本明細書で論じる「共刺激性」または「TCR調整可能」CARを提供することを含む、ステップとを含む、プロセスを提供する。
PBMCを密度遠心分離法(lymphoprep)により白血球除去材から単離し、凍結保存した。PBMCを蘇生させ、ゾレドロン酸(5μM)で刺激したPBMCをIL-2(1000IU/mL)と5%ヒトAB血清の存在下で、増殖培地において培養した。培養物において48時間後(37℃、5%CO2、加湿雰囲気)、細胞に、伝統的CAR配列(抗CD19scFv-CD28-CD137-CD3ζ)または共刺激性CAR配列(抗CD19scFv-CD28-CD137)のいずれかと、MOI10の5μg/mLのポリブレンと共に、レンチ-CMV-MCS-EF1a-puro構成物を含有するレンチウイルスを形質導入した。形質導入を24時間後に繰り返した。CARmRNA発現を、5日目に両構成物の発現を検出するユニバーサルプライマーを用いて、QPCRにより検証した。各構成物の特異的な発現を、差別的プライマーおよびユニバーサルプライマーの組み合わせを用いて確かめた(図5、6のように)。
細胞に伝統的CAR配列を含有するレンチウイルスを形質導入し、例1に記載したように増殖させた。形質導入後7日目に、形質導入したまたは形質導入していないγδT細胞を、CD19陽性標的細胞株、DaudiまたはRamosと共に共培養することにより細胞毒性活性を評価した。標的細胞株を、フローサイトメトリーを用いて、CD19標的集団の特異的視覚化のために、非毒性膜染料PKH67(5μM)で染色した。ガンマデルタT細胞または伝統的なCARを発現するγδT細胞と共に4.5時間共培養した後、共培養物をannexin Vおよびヨウ化プロピジウム(PI)で染色してアポトーシス細胞を可視化した。特異性細胞死率を標的細胞集団においてのみ計算した。非形質導入γδT細胞と比較し、CAR形質導入γδT細胞の効能はCD19陽性標的細胞において増大した(図7)。
細胞に伝統的CAR配列または共刺激性CAR配列を含有するレンチウイルスを形質導入し、実施例1に記載したように増殖させた。CD19陽性標的細胞株、DaudiまたはRamosを24時間、+/-5μMゾレドロン酸で前処理した。細胞毒性活性を実施例2に記載するように評価した。PKH67染色標的細胞(+/-ゾメタ前処理)を形質導入したまたは形質導入していないγδT細胞とともに共培養した。共刺激性CAR発現γδT細胞は、CD3ζ活性化ドメインを欠くにも関わらず、IPP感知によるγδTCRを介した活性化により代わりにシグナル1が提供され、CD19陽性標的細胞に対して伝統的CAR発現γδT細胞と同様の細胞毒性を呈した。両CARは、非形質導入γδT細胞と比較した場合、γδT細胞に対し細胞毒性の増大を提供した(図8)。
Claims (14)
- (i)細胞表面標的と結合するときにT細胞受容体(TCR)シグナル(シグナル1)を提供するγδT細胞受容体と、
(ii)細胞膜を横断し、細胞内の共刺激性シグナル伝達ドメインに連結する膜貫通ドメインに結合し、共刺激性シグナル(シグナル2)を提供することができる、細胞表面標的を認識して標的とする合成受容体である少なくとも1つの共刺激性キメラ抗原受容体(CAR)と、
を含む、修正γδT細胞であって、
前記少なくとも1つの共刺激性キメラ抗原受容体(CAR)が、細胞表面標的と結合するときに共刺激性シグナル(シグナル2)を提供し、かつ、前記少なくとも1つの共刺激性CARがT細胞受容体(TCR)シグナル(シグナル1)を提供しない、修正γδT細胞。 - 前記γδT細胞受容体がVγ9Vδ2TCRである、請求項1に記載の修正γδT細胞。
- 阻害性キメラ抗原受容体(ICAR)をさらに含む請求項1に記載の修正γδT細胞であって、前記阻害性キメラ抗原受容体による抗原の結合は、共刺激性シグナル(シグナル2)を阻害する、修正γδT細胞。
- 前記キメラ抗原受容体は、細胞感染症、細菌感染症、真菌感染症、または原虫感染症に見られるまたは関連する、細胞表面標的または天然リガンド;活性または非活性のウイルス断片;ペプチド;タンパク質;ウイルス由来の抗原セグメント;腫瘍特異的抗原または腫瘍関連抗原に結合することが可能である、請求項1~3の何れか一項に記載の修正γδT細胞。
- 請求項1~4の何れか一項に記載のがんまたは感染症の処置で用いる修正γδT細胞であって、前記感染症はウイルス、細菌、真菌、または原虫の感染症から選択される、修正γδT細胞。
- 請求項5の何れか一項に記載のがんまたは感染症の処置で用いる修正γδT細胞であって、前記修正γδT細胞は、アミノビスフォスフォネートまたはその代替品と共に対象に同時投与され、前記代替品は、生理学的なメバロン酸経路の調節不全を介して、標的細胞に存在するリン酸化抗原のレベルを高めることが可能である、修正γδT細胞。
- キメラ抗原受容体(CAR)をコードする核酸配列を含む、核酸であって、前記CARは、細胞外抗原認識ドメイン、ヒンジ、膜貫通ドメイン、ならびに
CD3ゼータドメインが欠如している、シグナル2を提供するための1つもしくは複数の共刺激性シグナル伝達領域を含み、かつ、
ヌクレオチド配列SEQ ID NO:7を含み、アミノ酸配列SEQ ID NO:8~11をコードすることが可能な、核酸配列を含む、核酸。 - 請求項7に記載の核酸をγδT細胞に組み込んで、または形質導入して、前記γδT細胞を遺伝子改変するステップを含む、CAR修正γδT細胞を提供するプロセス。
- 自家的または同種的な移植により対象を処置するために組み合わせて用いる、請求項1~4の何れか一項に記載のγδT細胞とピロフォスファート/フォスフォネート薬物とを含む、キット。
- 請求項1~4の何れか一項に記載のγδT細胞を含む医薬組成物。
- がんの処置で用いる、サイトカイン、インターフェロンガンマ、IL-2、化学療法薬、生物製剤、またはその組み合わせをさらに含む、請求項10に記載の医薬組成物。
- ウイルスの処置で用いる療法薬をさらに含む、請求項10または11に記載の医薬組成物。
- ドナー対象から採取したドナー細胞を、レシピエント対象に治療的に有効な量のγδT細胞を同種的に投与できるように処理するステップであって、前記処理ステップは前記γδT細胞を修正してキメラ抗原受容体を組み込み、請求項1に記載の修正γδT細胞を提供するステップを含む、処置を準備する方法。
- ドナー対象から採取したドナー細胞を、前記ドナー対象に治療的に有効な量のγδT細胞を投与できるように処理するステップであって、前記処理ステップは前記γδT細胞を修正してキメラ抗原受容体を組み込み、請求項1に記載の修正γδT細胞を提供するステップを含み、前記キメラ抗原受容体は疾病抗原に対し結合特異性を有する細胞外抗原結合ドメイン、ヒンジ、膜貫通ドメイン、1つまたは複数の共刺激性シグナル伝達領域、および非機能性CD3ゼータドメインを含む、ステップを含み、前記非機能性CD3ゼータドメインは、前記キメラ抗原受容体におけるCD3ゼータドメインの欠如により提供される、処置を準備する方法。
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