JP6506270B2 - アンチセンスオリゴヌクレオチド組成物 - Google Patents
アンチセンスオリゴヌクレオチド組成物 Download PDFInfo
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- JP6506270B2 JP6506270B2 JP2016520746A JP2016520746A JP6506270B2 JP 6506270 B2 JP6506270 B2 JP 6506270B2 JP 2016520746 A JP2016520746 A JP 2016520746A JP 2016520746 A JP2016520746 A JP 2016520746A JP 6506270 B2 JP6506270 B2 JP 6506270B2
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- 230000001225 therapeutic effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- RYYWUUFWQRZTIU-UHFFFAOYSA-K thiophosphate Chemical compound [O-]P([O-])([O-])=S RYYWUUFWQRZTIU-UHFFFAOYSA-K 0.000 description 1
- 238000001890 transfection Methods 0.000 description 1
- 239000012137 tryptone Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000017613 viral reproduction Effects 0.000 description 1
- 239000013603 viral vector Substances 0.000 description 1
- 239000012138 yeast extract Substances 0.000 description 1
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Description
LFn−GAL4を大腸菌培養物から約5mg/Lの収率で濃縮した。LFn−GAL4タンパク質をコードするDNA配列は、配列番号4(図9)である。この配列は、大腸菌発現カセットであるプラスミドpET151/D(Invitrogen社)内にある。
化学的にコンピテントな細菌(大腸菌BL21*DE3(Invitrogen社))を精製プラスミド(前述)で形質転換し、アンピシリン(200μg/mL)培地を含む2×yeast extract tryptone(2×YT)細菌培養液中で一晩培養(10mL)した後、同様な濃度のアンピシリンを含む大容積(1L)の2×YT中で継代培養した。次に、180rpm(37℃)に設定したオービタルシェーカー中で、細菌培養物を3時間インキュベートした。続いて、イソプロピルβ−D−1−チオガラクトピラノシド(IPTG)を500μMの最終濃度で加え、さらに3時間インキュベートした。細菌ペレットを遠心分離(6000×g、10分、4℃)により調製し、1500PSIに設定したフレンチプレスを用いて溶菌した。溶菌液をさらに遠心分離した(20000×g、20分)。得られた上清を6×His(Co2+ Tallon(登録商標)樹脂(Clontech社))アフィニティークロマトグラフィーカラムに通した。150mMイミダゾールを用いて1mLずつの画分にLFn−GAL4を溶出させた。画分をタンパク質の純度および濃度について分析し、プールし、リン酸緩衝食塩水で透析した。最終タンパク質調製物をSDS−PAGEで評価し、(タンパク質純度を決定するため)クーマシー染色および(V5および6×Hisに特異的な抗体を使用した)ウエスタンブロット解析を行った。
PA83を大腸菌BL21*DE3の培養物から約5mg/Lの収率で濃縮した。PA83をコードする既知のDNA配列を含むプラスミドはLes Baillie教授(University of Cardiff)からの寄贈として入手した。これは、N末端6×ヒスチジンアフィニティータグを付与する細菌発現ベクターpQE30中にサブクローニングされたPA83コード配列を含んでいた(Baillie et al., 2010)。化学的にコンピテントな細菌を精製プラスミドで形質転換し、上記と同様に一晩培養した。増殖相の間、1Lの細菌培養物を、180rpm(37℃)に設定したオービタルシェーカー中で3時間インキュベートした。続いて、IPTGを500μMの最終濃度で加え、さらに2時間インキュベートした。細菌ペレットを遠心分離(6000×g、10分)により調製し、上記と同様にフレンチプレスを用いて溶菌した。溶菌液をさらに遠心分離した(20000×g、20分)。得られた上清を6×ヒスチジンアフィニティークロマトグラフィーカラムに通した。150mMイミダゾールを用いて1mLずつの画分中にPAを溶出させた。タンパク質画分を純度および濃度について分析し、プールし、リン酸緩衝食塩水(PBS)で透析した。最終タンパク質調製物をSDS−PAGEで評価し、(純度を決定するため)クーマシー染色および(PAに特異的な抗体を使用した)ウエスタンブロット解析を行った。
GAL4認識配列の1つの鎖をそれぞれコードする2つの相補的オリゴヌクレオチドをアニーリングさせて、一本鎖アンチセンス配列が隣接した二本鎖(GAL4)タンパク質結合配列を形成した。この例では、記載のASO組成物(配列番号8および配列番号9;実施例4参照)を用いた。得られた組成物を図1のaに示す。アンチセンスオリゴヌクレオチドのハイブリダイゼーションは、2つの部分的に重複するオリゴヌクレオチドを融解(94℃、1分)および再アニーリング(55℃、1分)する反復(×10)熱サイクルにより行い、配列特異的にmRNAと相互作用する一本鎖アンチセンスオリゴヌクレオチド配列は遊離したままであった。
隣接配列およびGAL4結合配列を有する、シンタキシン5特異的アンチセンスオリゴヌクレオチド配列:
フォワードオリゴヌクレオチド(配列番号8)
5′AATTTGTTTGTTGAGGCTAATGCATGCCGGCTGCTCTGATGCCGGCAT3′
リバースオリゴヌクレオチド(配列番号9)
5′AATTTGTTTGTTGAGGCTAATGCATGCCGGCATCAGAGCAGCCGGCAT3′
フォワードオリゴヌクレオチド(配列番号10)
5′GGTCGTCTGCTGAGCTTTCTATGCATGCCGGCTGCTCTGATGCCGGCAT3′
リバースオリゴヌクレオチド(配列番号11)
5′GGTCGTCTGCTGAGCTTTCTATGCATGCCGGCATCAGAGCAGCCGGCAT3′
フォワードオリゴヌクレオチド(配列番号12)
5′GGTGCTCTTCATCTTGTTGGTATGCATGCCGGCTGCTCTGATGCCGGCAT3′
リバースオリゴヌクレオチド(配列番号13)
5′GGTGCTCTTCATCTTGTTGGTATGCCGGCATCAGAGCAGCCGGCATGCAT3′
アニーリングしたASOハイブリッドを産生した(実施例4同様)。これらのASOハイブリッドを、リン酸緩衝食塩水(PBS)中のLFn−GAL4と共に、室温で30分間、適切な化学量論量(すなわち、タンパク質とオリゴヌクレオチドのモル比が約3:1)でインキュベートした。
実施例5で生成した複合体の1つを用いて、Hela細胞におけるシンタキシン5遺伝子の発現を標的化した。ポア形成タンパク質PA83を用いて、LFn−GAL4との相互作用を介したアンチセンスオリゴヌクレオチドの膜移行の媒介を促進した。複合体のASO部分は、2つのアニーリングした(実施例4同様)ASO配列(配列番号8および配列番号9)からなっていた。Hela細胞は、通常条件下で培養した場合にシンタキシン5を産生する。Hela細胞を、1リットルあたり、0pMol(対照)、1pMol、10pMol、50pMol、100pMol、および200pMolの種々のASO複合体濃度範囲で様々な方法で処理した。
Hela細胞におけるヒトパピローマウイルス(血清型18)Early 7の発現に対する抗HPV E7アンチセンスオリゴヌクレオチドの有効性を調べるための実験を、異なるオリゴヌクレオチド配列を用いたこと以外は前述の実施例6と同様に行った。本例では、実施例6の(配列番号8および配列番号9から形成された)シンタキシン5特異的ASOハイブリッドの代わりに、(配列番号10および配列番号11から形成された)ハイブリッドタンパク質結合領域および小さな隣接領域を含むHPV−E7特異的ASOハイブリッドを用いた。本実施例では、LFn−GAL4およびPA83と結合した200pMのオリゴヌクレオチドを用いた(これは図5のグラフの黒色のバーである)。結果は図5に示されており、遺伝子発現の割合がy軸に示されている。対照処理(PBS)を100%とし、これは図5のグラフで白色のバーである。データは各実験の3回の反復を表し、エラーバーは平均値の標準誤差を表す。2つの処理間には統計的な差があった(片側独立t検定による測定でp=0.0104)。
実施例5と同様に作製したASOハイブリッド−シャトル複合体を、ポリ(エチレンイミン)(PEI)との関連で毒性について調べた(表1)。これらのデータは、トランスフェクションを媒介可能であるとして文献中でよく特徴付けられている種々の濃度のカチオン性ポリマーPEI、および50μg/mLのPAの存在下でASOハイブリッドと72時間のハイブリダイゼーションした後のLFn−GAL4タンパク質のいずれかに曝露した細胞に関連する毒性の差を示す。細胞生存率を非処理細胞に対して標準化し、MTTを添加することにより測定した(Richardson et al., 1999)。
図2は、(膜移行が律速でない)無細胞アッセイにおいてASO成分と比較した本発明の組成物の効果を示す。
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Claims (15)
- 部分的に相補的な一対の一本鎖オリゴヌクレオチド−ここで前記一対の一本鎖オリゴヌクレオチドはハイブリダイズすると少なくとも1つの一本鎖アンチセンス配列および少なくとも1つの二本鎖タンパク質結合配列を生じる;
細胞膜中のポアを通して遺伝子材料を運搬することができ、前記二本鎖タンパク質結合
配列を認識して前記二本鎖タンパク質結合配列に非共有結合的に結合する核酸結合ドメイ
ンを含むシャトルタンパク質−ここで、前記シャトルタンパク質は、炭疽菌致死因子(LF)ドメインI(LFn)を含む;および
炭疽菌の病原性因子である防御抗原PA83であるポア形成タンパク質
を含む、細胞の細胞質中へのアンチセンスオリゴヌクレオチドの送達に有用なアンチセンスオリゴヌクレオチド含有組成物。 - スルホン化により安定性が向上するように修飾されているオリゴヌクレオチドを含む、請求項1に記載のアンチセンスオリゴヌクレオチド含有組成物。
- 前記タンパク質結合配列が、CGG−N11−CCGであり、Nは、任意のプリン塩基
またはピリミジン塩基である、請求項1または請求項2に記載のアンチセンスオリゴヌクレオチド含有組成物。 - 前記タンパク質結合配列が、
5′−CGGCTGCTCTGATGCCG−3′、または
5′−CGGCATCAGAGCAGCCG−3′
である、請求項1〜請求項3のいずれか一項に記載のアンチセンスオリゴヌクレオチド含有組成物。 - 炭疽菌致死因子LFのドメイン(II〜IV)の少なくとも1つが、前記核酸結合ドメインによって置換されている、請求項1〜請求項4のいずれか一項に記載のアンチセンスオリゴヌクレオチド含有組成物。
- 前記シャトルタンパク質の前記核酸結合ドメインが、出芽酵母のGAL4である、請求項1〜請求項5のいずれか一項に記載のアンチセンスオリゴヌクレオチド含有組成物。
- 前記アンチセンス配列が、標的遺伝子由来のメッセンジャーRNAとハイブリダイズするようにデザインされた一本鎖DNAである、請求項1〜請求項6のいずれか一項に記載のアンチセンスオリゴヌクレオチド含有組成物。
- 前記標的遺伝子が、ウイルスによって発現される、請求項7に記載のアンチセンスオリゴヌクレオチド含有組成物。
- 前記標的遺伝子が、ヒトパピローマウイルス(HPV)によって発現される、請求項7または請求項8に記載のアンチセンスオリゴヌクレオチド含有組成物。
- 任意に薬学的に許容される賦形剤およびキャリアからなる群から選択される少なくとも1つの添加剤をさらに含む、治療において使用するための、請求項1〜請求項9のいずれか一項に記載のアンチセンスオリゴヌクレオチド含有組成物。
- ヒトパピローマウイルス(HPV)に感染した対象を治療するための、請求項10に記載のアンチセンスオリゴヌクレオチド含有組成物。
- 癌を治療するための、請求項10に記載のアンチセンスオリゴヌクレオチド含有組成物。
- 子宮頸癌(cervical cancer)または口腔癌を治療するための、請求項10に記載のアンチセンスオリゴヌクレオチド含有組成物。
- 請求項1〜請求項9のいずれか一項に記載のアンチセンスオリゴヌクレオチド含有組成物を用意すること、および
前記アンチセンスオリゴヌクレオチド含有組成物を前記細胞に適用すること
を含む、細胞の膜を通してアンチセンスオリゴヌクレオチドをインビトロで輸送する方法。 - (i)部分的に相補的な2つの一本鎖オリゴヌクレオチドを用意すること;
(ii)前記2つのオリゴヌクレオチドをハイブリダイズさせて、少なくとも1つの一本鎖アンチセンス配列および少なくとも1つの二本鎖タンパク質結合配列を含むオリゴヌクレオチドハイブリッドを形成すること;
(iii)細胞膜のポアを通して遺伝子材料を運搬することができ、前記二本鎖タンパク質結合配列を認識する核酸結合ドメインを有するシャトルタンパク質を用意し、さらにポア形成タンパク質を用意すること−ここで、前記シャトルタンパク質は炭疽菌致死因子(LF)ドメインI(LFn)を含み、前記ポア形成タンパク質は炭疽菌の病原性因子である防御抗原PA83である;ならびに
(iv)前記シャトルタンパク質の前記核酸結合ドメインおよび前記オリゴヌクレオチドハイブリッドの前記タンパク質結合配列により、前記シャトルタンパク質を前記オリゴヌクレオチドハイブリッドと非共有結合的に複合体化すること
を含む、アンチセンスオリゴヌクレオチドをシャトルタンパク質と非共有結合的に複合体化する方法。
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PCT/GB2014/051918 WO2014203008A1 (en) | 2013-06-21 | 2014-06-23 | Antisense oligonucleotide compositions |
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