JP7101751B2 - 細胞の増殖 - Google Patents
細胞の増殖 Download PDFInfo
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- JP7101751B2 JP7101751B2 JP2020213055A JP2020213055A JP7101751B2 JP 7101751 B2 JP7101751 B2 JP 7101751B2 JP 2020213055 A JP2020213055 A JP 2020213055A JP 2020213055 A JP2020213055 A JP 2020213055A JP 7101751 B2 JP7101751 B2 JP 7101751B2
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- cell proliferation
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Description
実施形態を実施する方法/プロセス/プロトコルのいくつかの例が以下で記載される。特定の特徴(細胞型、サイトカイン、抗原提示等)がこれら実施例において記載されるが、それらはあくまでも例示の目的で行われる。本発明は以下の実施例に制限されない。
QUANTUM(登録商標)細胞増殖システム(CES)の比較のためのベースライン(baseline)を生成するため、白血球アフェレーシス生成物から純化した単球を樹状細胞に成熟させ、Wolfl(Wolfl中のoの上には実際にはウムラルトがつくが、電子出願では使用できない文字なので省略してある。)とGreenbergのプロトコル(Nature Protocols 9巻、4号、2014年)に従って(白血球アフェレーシス生成物から凍結保存された)ドナー適合したT細胞と結びつける(combined)。該プロトコルの全体は、ここでの開示により明確に本出願に組み込まれる。
T細胞は、以下の2つの方策でQUANTUM(登録商標)CESにおいて良好に増殖される。すなわち、抗体機能化された常磁性ビーズ(DynaBeads T cell Activator)(Q1070)によるCD3及びCD28の共刺激による方策、及び、オリジナルの白血球アフェレーシス生成物に存在する単球から成熟されたプロフェッショナルな抗原提示細胞(APCs)である単球由来樹状細胞(DCs)(Q1069)による抗原提示による方策である。これら2つの方策は、T細胞培養の増殖に対して、QUANTUM(登録商標)CESにおいて初期の効果を発揮する(図14参照)。
多くのサイトカインは、T細胞増殖を促進する。そのようなサイトカインとしては、IL-2や、IL-7とIL-15との組み合わせ等がある。これらサイトカインを投与する方法として、適切なサイトカイン濃度含有の予め構成された培地のボーラス注入法(bolus injection)と連続かん流法(continual perfusion)の2つの候補がある。これは、7群の研究によって調べられた。この研究では、IL-2のみ、IL-7とIL-15との組み合わせ、及びそれら3つのサイトカイン全ての組み合わせを上記2つの方法で、QUANTUM(登録商標)CESに供給して、直接比較した。この研究の対照群(control)は、サイトカインを投入しない一群である。この調査から、IL-7とIL-15との組み合わせの連続かん流法において、より高い倍率の増殖が得られることが分かった(図15参照)。図15は、サイトカインの種々の組み合わせ及び2つの投与方法での比較のために行われたQUANTUM(登録商標)CESの増殖における収穫数を示す。
次のステップでは、細胞増殖中におけるIC循環レートの増加及びバイオリアクターに対する6度揺動の付加を調べる。培養環境へのこれら新しい条件の適用は、T細胞増殖に対してネガティブな影響を与えることが分かった(図16参照)。図16は、対照群(バイオリアクター静止、循環レート5ml/min)と揺動させながらIC循環レートを増やす群(±6度の揺動、循環レート20ml/min)との収穫数の比較を示すグラフである。
T細胞増殖は、組み換えヒトインターロイキン2(improved sequence)(IL-2 IS)(ミルテニーバイオテク社、ドイツ)と組み換えヒトインターロイキン7(IL-7)(ミルテニーバイオテク社、ドイツ)とが補充されたTexMACS GMPグレード培地(ミルテニーバイオテク社、ドイツ)で促進される。T細胞増殖は、結合された共刺激シグナルすなわちDynaBeads(登録商標)Human T-Activator CD3/CD28(ライフ・テクノロジーズ社、ニューヨーク州、グランドアイランド)又は可溶性(soluble)共刺激シグナルすなわちImmunoCult(商標)Human CD3/CD28 T Cell Activator(STEMCELL Technologies社、カナダ)を用いて、開始される。QUANTUM(登録商標)CES(テルモBCT社、コロラド州、レイクウッド)は、リン酸緩衝生理食塩水(PBS)(ロンザ社、スイス)でプライミングされ、システムから空気が除去される。プライミングシーケンスに従って、PBSは、TexMACS GMP培地に交換される。
Claims (7)
- 細胞を増殖するための細胞増殖システムであって、該システムは、
第1ポートと第2ポートとを有する中空糸型バイオリアクターと、
第1端部が前記中空糸型バイオリアクターの第1ポートと連通し、第2端部が前記中空糸型バイオリアクターの第2ポートと連通し、前記中空糸型バイオリアクターの毛細管内側部分を通る第1流体流路と、
前記第1流体流路に連通した流体入口路と、
前記第1流体流路に連通した細胞収穫路と、
前記第1流体流路において流体を循環させる第1ポンプと、
前記流体入口路に連通し、白血球を含み且つ一部の細胞がT細胞であり、白血球アフェレーシスを用いて集められて精製過程を経ていない第1の複数の細胞を有する第1の流体を収容した細胞投入バッグと、
前記流体入口路に連通し、前記第1の複数の細胞の増殖を活性化するための第1の活性化剤を収容したバッグと、
前記流体入口路に連通し、培地を含む第2の流体を収容した培地バッグと、
前記細胞収穫路に連通した細胞収穫バッグと、
プロセッサと、
メモリと、
前記細胞投入バッグと前記流体入口路とを繋ぐ流路上に設けられ、前記プロセッサにより操作される第1バルブと、
前記バッグと前記流体入口路とを繋ぐ流路上に設けられ、前記プロセッサにより操作される第2バルブと、
前記培地バッグと前記流体入口路とを繋ぐ流路上に設けられ、前記プロセッサにより操作される第3バルブと、
前記細胞収穫路に設けられ、前記プロセッサにより操作される第4バルブと、
を備え、
前記プロセッサは命令を実行可能であり、
前記メモリは前記命令を記憶し、
前記命令は、前記プロセッサによって実行されるとき、
前記第1バルブを開いて白血球を含む第1の複数の細胞を有する第1の流体を、前記中空糸型バイオリアクターの前記毛細管内側部分へ導入するステップと、
前記第2バルブを開いて前記毛細管内側部分において前記第1の複数の細胞を第1の活性化剤へ曝露し、前記中空糸型バイオリアクターにおける前記第1の複数の細胞の増殖を活性化させるステップと、
前記第3バルブを開いて前記培地を含む第2の流体を前記毛細管内側部分に導入し、前記第1の複数の細胞のうちの少なくとも一部の細胞を増殖させ、第2の複数の増殖細胞を生成するステップと、
前記第4バルブを開いて前記中空糸型バイオリアクターから前記第2の複数の増殖細胞を取り出すステップと、
を有する方法を実行することを特徴とする細胞増殖システム。 - 請求項1記載の細胞増殖システムにおいて、前記細胞増殖システムは、閉鎖系システムであることを特徴とする細胞増殖システム。
- 請求項1又は2記載の細胞増殖システムにおいて、前記第2の複数の増殖細胞はT細胞を含むことを特徴とする細胞増殖システム。
- 請求項1~3のいずれか1項に記載の細胞増殖システムにおいて、前記第1の流体は、前記第1の活性化剤を表面に有するビーズを含むことを特徴とする細胞増殖システム。
- 請求項1~4のいずれか1項に記載の細胞増殖システムにおいて、前記第1の活性化剤は、抗CD2抗体、抗CD3抗体、抗CD28抗体及びそれらの組み合わせからなる群のうちから選択された1又は複数の抗体を含むことを特徴とする細胞増殖システム。
- 請求項1~5のいずれか1項に記載の細胞増殖システムにおいて、前記培地は、インターロイキン2(IL-2)、インターロイキン4(IL-4)、インターロイキン5(IL-5)、インターロイキン7(IL-7)、インターロイキン15(IL-15)、及びそれらの組み合わせからなる群のうちから選択された1又は複数のサイトカインを含むことを特徴とする細胞増殖システム。
- 請求項1~6のいずれか1項に記載の細胞増殖システムであって、前記第1の活性化剤は、可溶性の活性剤を含むことを特徴とする細胞増殖システム。
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