JP6595459B2 - 種々の細胞集団におけるナノ粒子媒介遺伝子送達、ゲノム編集およびリガンド標的化修飾 - Google Patents
種々の細胞集団におけるナノ粒子媒介遺伝子送達、ゲノム編集およびリガンド標的化修飾 Download PDFInfo
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Description
本発明は、国立衛生研究所によって拠出されたR01 AG030637の下で米国政府支援によりなされた。米国政府は本発明における一定の権利を有する。
本発明は、概して細胞をトランスフェクトするためのナノ粒子の使用に関する。より具体的には、本発明は、遺伝子発現を修飾するためのポリヌクレオチドの細胞内送達のためのポリプレックスコアでコーティングしたナノ粒子に関する。
ポリヌクレオチドを細胞に導入して遺伝子発現を変化させることは、ポリヌクレオチドを適当にパッケージングしてポリヌクレオチドを細胞移入前の分解から保護し、細胞への移入を可能にし、適当な細胞内区画への送達を指示することを要する。発現を変化させることにおける有効性はまた、細胞移入後にポリヌクレオチドをパッケージングから放出する時間枠にも依存する可能性がある。遺伝子発現を修飾するために利用可能なナノ粒子ベースの技術は、少なくとも一部は前記要件を満たすことの限界のために、低レベルの細胞トランスフェクションおよびトランスフェクションの限られた有効性に悩まされている。そのため、これらの要件の全てに対処して有効性を増強させるナノ粒子ベースのトランスフェクション剤およびその使用方法を得ることが望ましい。
図1Aを続けると、本発明の別の態様では、ナノ粒子のポリプレックスコア中のカチオン性ペプチドが、H1、H2、H3またはH4タンパク質などのヒストンペプチドの断片であることができる。断片は、その配列がヒストンタンパク質のN末端に相当するアミノ酸を含むことができる。例えば、断片は、ヒストンタンパク質の最大で最初の5個(配列番号9)、10個(配列番号10)、15個(配列番号11)、20個(配列番号12)、25個(配列番号13)またはそれ以上のN末端アミノ酸を含むことができる。断片がそのC末端上でアミド化されていてもよい。断片が、1個または複数のリジン残基がメチル化される、1個または複数のヒスチジン、リジン、アルギニンまたは他の相補的残基がヒストンアセチルトランスフェラーゼまたはアセチルCoA基質としてアセチル化されるまたはアセチル化を受けやすい、または前記の任意の組み合わせになるように修飾されていてもよい。例えば、本発明によると、ナノ粒子ポリプレックスコア中のカチオン性ペプチドは、そのC末端でアミド化され、リジン4でトリメチル化された、ヒトヒストン3タンパク質の最初の25個のアミノ酸を含む配列番号3によって表される配列を有することができる(HTP)。
Claims (23)
- コアポリプレックスと、その上のシリカコーティングとを含むナノ粒子であって;
前記コアポリプレックスが、1種以上のアニオン性ポリマー、1種以上のカチオン性ポリマー、カチオン性ポリペプチドおよびポリヌクレオチド
を含み、
前記の1種以上のアニオン性ポリマーが、ポリ(D−グルタミン酸)、グリコサミノグリカン、糖タンパク質、多糖、ポリ(マンヌロン酸)、ポリ(グルロン酸)、ヘパリン、ヘパリン硫酸、コンドロイチン、コンドロイチン硫酸、ケラタン、ケラタン硫酸、アグリカン、およびその2種以上の任意の組み合わせからなる群から選択され;そして、
前記の1種以上のカチオン性ポリマーが、ポリ(アルギニン)、ポリ(リジン)、ポリ(ヒスチジン)、ポリ(オルニチン)、ポリ(シトルリン)、ポリ(エチレンイミン)、ポリ(アスパルタミド)、カチオン性ポリペプトイド、電荷官能化ポリエステル、カチオン性多糖、アセチル化アミノ糖、キトサン、およびその2種以上の任意の組み合わせからなる群から選択される、前記ナノ粒子。 - 前記アニオン性ポリマーが、ポリ(D−グルタミン酸)である、請求項1に記載のナノ粒子。
- 前記カチオン性ポリマーが、ポリ(エチレンイミン)およびポリ(L−アルギニン)からなる群から選択される、請求項1に記載のナノ粒子。
- 前記カチオン性ポリペプチドが、ヒストンテールペプチドである、請求項1に記載のナノ粒子。
- 前記ヒストンテールペプチドが、ヒトH3ヒストンテールペプチドである、請求項4に記載のナノ粒子。
- 前記アニオン性ポリマーが、ポリ(D−グルタミン酸)であり、前記カチオン性ポリマーが、ポリ(エチレンイミン)およびポリ(L−アルギニン)からなる群から選択され、前記カチオン性ポリペプチドが、ヒストンテールペプチドである、請求項1に記載のナノ粒子。
- 前記ポリヌクレオチドが、ヌクレアーゼをコードするヌクレオチド配列を含む、請求項6に記載のナノ粒子。
- 前記ヌクレアーゼが、TALENである、請求項7に記載のナノ粒子。
- 前記TALENがDNAの部位特異的遺伝子座で破壊を誘導することができ、前記破壊が、遺伝子によってコードされるタンパク質の発現の変化をもたらす、請求項8に記載のナノ粒子。
- 前記変化が、低下であり、前記遺伝子が、スクレロスチンタンパク質をコードする、請求項9に記載のナノ粒子。
- 前記シリカコーティングの外表面と結合したポリマーをさらに含む、請求項6に記載のナノ粒子。
- 前記シリカコーティングの外表面と結合した前記ポリマーが、ポリ(L−アルギニン)または血管作動性内皮増殖因子ペプチドを含む、請求項11に記載のナノ粒子。
- 細胞内ポリヌクレオチドの修飾において使用するための、請求項1に記載のナノ粒子であって、
前記ポリヌクレオチドが、ヌクレアーゼをコードするヌクレオチド配列を含む、前記ナノ粒子。 - 前記アニオン性ポリマーが、ポリ(D−グルタミン酸)である、請求項13に記載のナノ粒子。
- 前記カチオン性ポリマーが、ポリ(エチレンイミン)およびポリ(L−アルギニン)からなる群から選択される、請求項13に記載のナノ粒子。
- 前記カチオン性ポリペプチドが、ヒストンテールペプチドである、請求項13に記載のナノ粒子。
- 前記ヒストンテールペプチドが、ヒトH3ヒストンテールペプチドである、請求項16に記載のナノ粒子。
- 前記アニオン性ポリマーが、ポリ(D−グルタミン酸)であり、前記カチオン性ポリマーがポリ(エチレンイミン)およびポリ(L−アルギニン)からなる群から選択され、前記カチオン性ポリペプチドがヒストンテールペプチドである、請求項13に記載のナノ粒子。
- 前記ヌクレアーゼが、TALENである、請求項13に記載のナノ粒子。
- 前記TALENが、DNAの部位特異的遺伝子座で破壊を誘導することができ、前記破壊が遺伝子によってコードされるタンパク質の発現の変化をもたらす、請求項19に記載のナノ粒子。
- 前記変化が、低下であり、前記遺伝子がスクレロスチンタンパク質をコードする、請求項20に記載のナノ粒子。
- 前記シリカコーティングが、前記シリカコーティングの外表面と結合したポリマーをさらに含む、請求項18に記載のナノ粒子。
- 前記シリカコーティングの外表面と結合した前記ポリマーが、ポリ(L−アルギニン)または血管作動性内皮増殖因子ペプチドを含む、請求項22に記載のナノ粒子。
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