JP5666903B2 - 導入遺伝子の発現を増強するための方法および組成物 - Google Patents
導入遺伝子の発現を増強するための方法および組成物 Download PDFInfo
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Description
適用可能ではない。
本発明は一般に、細胞内において外因性核酸を発現させるための改良された方法および組成物に関し、より詳細には、アデノウイルスベクターを用いた、ヒト免疫細胞内における外因性遺伝物質の改良された発現に関する。
共刺激シグナル
発現ベクター
キット
遺伝子改変
ジンクフィンガーヌクレアーゼ
A.ジンクフィンガータンパク質
ヒトCCR5遺伝子を標的とするジンクフィンガーヌクレアーゼ
B.切断ドメイン
C.CCR5の標的化した切断への付加的方法
遺伝子解析
治療
免疫学的疾患
高増殖性疾患
感染症
再生
走化性
抗CD3/抗CD28抗体で活性化させたTリンパ球の形質導入
A.抗CD3抗体/抗CD28抗体で活性化させたT細胞
健常なドナーから初期Tリンパ球を得た。凍結試料の場合には、細胞を解凍して、10%FBS、1%L−グルタミン、および10ng/mLのIL−2(Sigma 12644)を加えたRPMI培養液中において、1×106細胞/mLの細胞密度で培養した。Dynabeads CD3/CD28(Invitrogen、カリフォルニア州カールスバッド市)を用いて、直ちにこれらのTリンパ球をCD3/CD28に対する経路によって活性化させた。Dynabeadsの調製や操作は、製造業者のプロトコルに従って行った。簡単に説明すると、細胞に再懸濁するビーズ(1×106細胞/mLあたり75uLのDynabeads)を、エッペンドルフチューブ中において培養液で3回洗浄した。各回の洗浄にあたっては磁石を用いてビーズを沈殿させた。Tリンパ球の培養物を37℃、5%CO2で15〜48時間インキュベートした。
B.ビーズで活性化させたT細胞とIL−7で活性化させたT細胞との形質導入効率の比較
C.ビーズで活性化させたT細胞とPHA/IL−2で活性化させたT細胞との形質導入効率の比較
抗CD3/抗CD28ビーズで活性化させたTリンパ球の形質導入
末梢血単核球(PBMC)およびCD4 T細胞に対しても、実施例1および2に記載のように、別々に調製した(ロットが異なる)2つのAd5/35 GFPベクターを用いて形質導入を行った。
導入遺伝子の発現
ビーズで活性化させたT細胞における導入遺伝子の発現レベルの評価も行った。PHAおよびIL−2、または抗CD3/抗CD28抗体被覆ビーズのいずれかを4日間添加することによってCD4 T細胞を活性化させた。次いで、Ad5/35 GFPベクターを10、30、または100のMOIで用いて、これらの活性化細胞に形質導入を行った。
内因性標的の切断
上記のように、PHA/IL−2または抗CD3/CD28ビーズでT細胞を活性化して、GFP、CCR5−ZFN、およびGR−ZFNをコードするAd5/F35ウイルスで形質導入を行う。形質導入後3日目および10日目に細胞を回収して、ゲノムDNAを抽出する。ZFNがCCR5またはGRにおけるそれぞれの標的部位を切断可能であるかどうかをCel1アッセイによって解析する。
Ad5/11を用いた形質導入
該方法の融通性を実証するために、実施例1に記載のように調製し活性化させたT細胞に、Ad5/F35ベクターの代わりにAd5/11ベクターを用いて形質導入を行う。T細胞の形質導入効率および導入遺伝子の活性を検証するために、同様の解析を行う。
Claims (15)
- 単離されたT細胞内でタンパク質をコードする導入遺伝子の発現を上昇させる方法であって、
a)第1および第2の共刺激剤を用いてT細胞集団を活性化させるステップ、ここで当該第1共刺激剤が、CD3抗体を含み、そして第2共刺激剤がCD28抗体を含み;と、
b)活性化させた前記T細胞集団を、タンパク質をコードする導入遺伝子、及び少なくとも1のジンクフィンガーヌクレアーゼをコードする配列を含むアデノウイルス発現ベクターと接触させるステップ
を含む、前記方法。 - 前記T細胞がCD4+細胞である、請求項1に記載の方法。
- 前記T細胞がCD8+細胞である、請求項1に記載の方法。
- 前記抗体がビーズ上に結合している、請求項1〜3のいずれか一項に記載の方法。
- 前記第2の共刺激剤がIL−15を含む、請求項1〜3のいずれか一項に記載の方法。
- 前記第2の共刺激剤が支持細胞を含む、請求項1〜3のいずれか一項に記載の方法。
- 前記アデノウイルス発現ベクターを偽型化した、請求項1〜6のいずれかに記載の方法。
- 偽型化した前記アデノウイルス発現ベクターがアデノウイルス5型(Ad5)およびアデノウイルス35型(Ad35)に由来する配列を含有する、請求項7に記載の方法。
- 前記Ad35配列がF35である、請求項8に記載の方法。
- 偽型化した前記アデノウイルス発現ベクターがアデノウイルス5型(Ad5)およびアデノウイルス11型(Ad11)に由来する配列を含有し、そして前記導入遺伝子、及び少なくとも1のジンクフィンガーヌクレアーゼを含む、請求項7に記載の方法。
- 前記ジンクフィンガーヌクレアーゼがCCR5における標的部位に結合する、請求項1〜10のいずれか1項に記載の方法。
- T細胞内でタンパク質をコードする導入遺伝子の発現を増加させるためのキットであって、第1及び第2共刺激剤、ここで当該第1共刺激剤がCD3抗体を含み、かつ第2共刺激剤がCD28抗体を含む;と、(i)当該タンパク質をコードする導入遺伝子及び(ii)少なくとも1のジンクフィンガーヌクレアーゼをコードする配列を含むアデノウイルスベクターとを含むキット。
- 内因性遺伝子を切断する方法であって、
請求項10又は11に記載の方法によって単離されたT細胞内で少なくとも1つのジンクフィンガーヌクレアーゼを発現させるステップを含み、それによって前記ジンクフィンガーヌクレアーゼが前記内因性遺伝子を切断することとなる方法。 - 前記内因性遺伝子がCCR5遺伝子である、請求項13に記載の方法。
- 前記内因性遺伝子がGR遺伝子である、請求項13に記載の方法。
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