JP7237088B2 - 免疫療法用のt細胞活性化及び増殖のための三次元バイオリアクター - Google Patents
免疫療法用のt細胞活性化及び増殖のための三次元バイオリアクター Download PDFInfo
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Description
Miltenyi MACSiBeadシステムを模倣するために、アビジン(ストレプトアビジン)及びビオチン結合メカニズムを利用して、抗CD2、CD3及びCD28抗体をバイオリアクター表面に固定した。まず、さまざまな濃度の蛍光標識アビジン及びストレプトアビジンを試験し(図13)、100μg/mLのアビジン又は30μg/mLのストレプトアビジンがバイオリアクター表面への比較的高いアビジン又はストレプトアビジンコーティング密度を実現することがわかった。図13は、さまざまな濃度のアビジン及びストレプトアビジンコーティングの蛍光強度を示す。蛍光標識アビジン/ストレプトアビジンを使用して、ポリドーパミンプライマーコーティングに結合可能なアビジン又はストレプトアビジンの濃度を試験した。アビジン/ストレプトアビジンコーティングの好適な手順を、以下のとおり記載する。アビジン又はストレプトアビジンのコーティング濃度は、更に最適化することができる。
1)バイオリアクター表面を、まず本明細書のポリドーパミンによってコーティングする。
2)トリスバッファー(pH8.5)にアビジン又はストレプトアビジンを溶解させ、それぞれ100μg/mL又は30μg/mLのアビジン又はストレプトアビジン濃度でコーティング溶液を調製する。穏やかに振盪、及び光への曝露から保護した状態で、バイオリアクターをコーティング溶液に12時間浸す。
3)足場をリン酸緩衝生理的食塩水(PBS)で完全に洗浄する。その後、ビオチン化抗体によるコーティングの準備ができた足場をPBS中に置いておく。
1)バイオリアクター足場をBPSから取り出す
2)可能なかぎり足場からPBSを除去するが、足場を乾燥したままにはしない。
3)200μLの100μg/mL CD2-ビオチン、200μLの100μg/mL CD3-ビオチン、及び200μLの100μg/mL CD28-ビオチンを15mLチューブ中で組み合わせ、1.4mLの抗体標識バッファー(0.5%熱失活ウシ胎仔血清及び2mM EDTAを加えたCa2+及びMg2+を含まないPBS、pH=7.2)を添加し、十分に混合して、各抗体のそれぞれの濃度が10μg/mLである合計2mLのビオチン化抗体を生成する。
4)2mLの混合抗体を添加して、12ウェルプレート中のバイオリアクターマトリックス(入口及び出口を伴わない、図7e)を覆い、上下にピペッティングして、混合する。
5)冷蔵庫中の暗所でマトリックス中において、穏やかな振盪下で2時間インキュベートする。
6)PBSで、足場から結合していない抗体を完全に洗い流す。
抗体コーティングマトリックス(入口及び出口を伴わない)をMiltenyi MACSiBead(商標)システムと比較した。コーティング手順と同様である製造業者の手順に従って、磁気ビーズ(既にストレプトアビジン結合済み)をビオチン化抗CD2、CD3、及びCD28抗体でコーティングした。Table 1(表1)に列挙されている比較的小さい直径2.1cm×高さ0.7cmのバイオリアクター(図7e)を使用した。バイオリアクターマトリックスは、12ウェルプレートのウェルに合うため、ビーズ及びマトリックスの性能を容易に比較することができる。3つのバイオリアクターマトリックスを、上記の好適な手順を使用して、まずアビジン又はストレプトアビジンでコーティングした後、ビオチン化CD2、CD3、CD28抗体でコーティングした。同じ濃度の抗体でバイオリアクターマトリックス及びMACSiBeadをコーティングした。ストレプトアビジンコーティングを有する1つのバイオリアクターマトリックスは、陰性対照として使用した抗体で更にコーティングしなかった。
上記と同様の調査を、単離T細胞に代わりにPBMCを用いて実施した。典型的には、T細胞及びその他の単核細胞、例えば、B細胞、NK細胞、単球等を含むPBMCを、患者から採取し、T細胞の単離をせずに細胞増殖に直接に使用した。これは、非T細胞がCD2、CD3、及びCD28によって活性化されず、活性化なしでは、数日後に自然に排除されるためである。この実験の図15の実験との別の違いは、抗体コーティングマトリックスを使用した場合の活性化工程の組み込みである。簡単に言えば、2.5×106細胞/mLの密度でPBMCを含む2mLの培養培地を、12ウェルプレートの3つのウェルに添加した。この3つのウェルは、それぞれ、1)7.5×106の抗体コーティング磁気ビーズ、2)抗体コーティングストレプトアビジン・マトリックス、及び3)抗体コーティングなしのストレプトアビジン・マトリックスを含む。最後の2つの実験でストレプトアビジンは、アビジンよりも優れていることを示したため、この実験にはアビジンコーティングマトリックスは使用しなかった。活性化のために2日間各ウェル中でPBMCをインキュベートした。その後、増殖段階を開始させるために培地が20IU/mLのヒトIL2を有するよう、IL2サイトカインを含む追加の培地をウェルに添加した。5日間の培養の間の総細胞数の変化を図16に示す。これは、抗体コーティングマトリックスを用いて増殖させたT細胞が、抗体コーティング磁気ビーズを用いたものよりも多くのT細胞をもたらすことを裏付けている。これは、抗体コーティングマトリックスが同等又は更に良好なT細胞活性化及び増殖をもたらすことができることも裏付けている。
灌流ベースの3Dバイオリアクターを、本明細書に記載されるとおりに作製した。ポリドーパミンによる12時間のコーティングによって3Dバイオリアクターの内面を準備した。その後、バイオリアクター内面を、ストレプトアビジンで12時間コーティングした。次に、バイオリアクターを滅菌のために70%エタノールとともにインキュベートした。滅菌後、内面をPBSで洗浄し、CD2、CD3、及びCD28-ビオチンコンジュゲートの等量の混合物(各抗体に関して10μg/mLの濃度)でコーティングして、上記の手順を使用して抗体をバイオリアクターの内面に固定した。
12 3D 表面領域
14 非ランダム空間
16 孔開口部
18 ハウジング
20 入口及び出口コンパートメント
22 流体分配器
24 デッドボリューム
Claims (22)
- 細胞増殖のための表面領域を有する複数の空間を備える3Dバイオリアクターを供給する工程であって、前記複数の空間は、直径Dを有し、前記空間間の複数の孔開口部は、D>dであるような直径dを有し、(a)前記空間の90%以上は、+/-10.0%を超えて変動しない選択された空間体積(V)を有し、(b)前記空間間の前記孔開口部の90%以上は、+/-10.0%を超えて変動しないdの値を有する、工程と、
細胞増殖のための前記バイオリアクター表面領域にポリドーパミンコーティングを施す工程と、
前記ポリドーパミンコーティングと結合した四量体タンパク質を準備する工程と、
前記四量体タンパク質に固定された1つ以上のビオチン化抗体を準備する工程と、
T細胞レセプターを有する前記バイオリアクターを通してT細胞を流す工程であって、前記T細胞レセプターは、前記1つ以上のビオチン化抗体と結合し、活性化される、工程と、
活性化されたT細胞を、シグナル伝達分子を含む灌流培地に曝露して、T細胞増殖を促進する工程と
を含む、T細胞増殖のための方法。 - 前記四量体タンパク質は、アビジン又はストレプトアビジンを含む、請求項1に記載の方法。
- 前記ビオチン化抗体は、抗CD3抗体を含む、請求項1に記載の方法。
- 前記ビオチン化抗体は、抗CD3抗体及び抗CD28抗体を含む、請求項1に記載の方法。
- 前記ビオチン化抗体は、抗CD3抗体、抗CD28抗体及び抗CD2抗体を含む、請求項1に記載の方法。
- 前記シグナル伝達分子は、サイトカインシグナル伝達分子を含む、請求項1に記載の方法。
- 前記空間は、0.4mm超の直径(D)を有し、前記孔は、0.20mm超の直径(d)を有する、請求項1に記載の方法。
- 前記空間は、0.4mm超から100.0mmの範囲の直径(D)を有する、請求項1に記載の方法。
- 前記孔は、0.2mmから10.0mmの範囲の直径(d)を有する、請求項1に記載の方法。
- 前記空間の95.0%以上は、+/-10.0%を超えて変動しない空間体積(V)を示す、請求項1に記載の方法。
- 前記空間の99.0%から100%は、+/-10.0%を超えて変動しない空間体積(V)を示す、請求項1に記載の方法。
- 前記空間間の前記孔開口部の95.0%以上は、+/-10.0%を超えて変動しないdの値を有する、請求項1に記載の方法。
- 前記空間間の前記孔開口部の99.0から100%は、+/-10.0%を超えて変動しないdの値を有する、請求項1に記載の方法。
- 存在する空間の少なくとも90.0%は、1つの空間当たり2個の孔開口部を有する、請求項1に記載の方法。
- 存在する空間の少なくとも90.0%は、1つの空間当たり8から12個の孔開口部を有する、請求項1に記載の方法。
- 前記空間は、凹状の内面を有する、請求項1に記載の方法。
- 前記空間は、球状空間を含む、請求項1に記載の方法。
- 前記球状空間は、3D円筒型スペース中に64.0%を超える充填効率を有する、請求項17に記載の方法。
- 前記3Dバイオリアクターは、少なくとも0.01GPaの引張弾性率を有する材料から形成される、請求項1に記載の方法。
- 前記3Dバイオリアクターは、生体適合性の材料から形成される、請求項1に記載の方法。
- 前記3Dバイオリアクターは、加水分解の量が、存在する材料の5.0質量%を上回らないよう、細胞培養中に加水分解感受性ではない材料から形成される、請求項1に記載の方法。
- 前記バイオリアクターは、直径Φ及び高さHを有し、比Φ:Hは、1:1超から100:1の範囲にある、請求項1に記載の方法。
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AU2018417950B2 (en) | 2024-09-19 |
CN112135900A (zh) | 2020-12-25 |
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KR102552344B1 (ko) | 2023-07-05 |
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