JP2019503204A - アプタマーによるポリアデニル化の調節を通じての遺伝子発現制御 - Google Patents
アプタマーによるポリアデニル化の調節を通じての遺伝子発現制御 Download PDFInfo
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- JP2019503204A JP2019503204A JP2018559685A JP2018559685A JP2019503204A JP 2019503204 A JP2019503204 A JP 2019503204A JP 2018559685 A JP2018559685 A JP 2018559685A JP 2018559685 A JP2018559685 A JP 2018559685A JP 2019503204 A JP2019503204 A JP 2019503204A
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Abstract
Description
を含む。
本明細書では、「リボスイッチ」という用語は、RNAポリヌクレオチドの制御性セグメントを指す。本発明の文脈のリボスイッチは、センサー領域(たとえばアプタマー)とエフェクター領域とを含み、これらが一緒に、リガンド(たとえば小分子)の存在を検知し、エフェクター領域にあるU1 snRNP結合部位アクセス可能度を調節する役割を担っている。一実施形態では、リボスイッチは、2つ以上のソースからのポリヌクレオチドを用いた組換え体である。本明細書では、リボスイッチに関しての「合成」という用語は、自然発生しないリボスイッチを指す。一実施形態では、センサー領域とエフェクター領域は、ポリヌクレオチド・リンカーにより接合されている。一実施形態では、ポリヌクレオチド・リンカーは、RNAステムを形成する(すなわち二本鎖であるRNAポリヌクレオチドの領域)。
リボスイッチのエフェクター領域は、リガンドのセンサー領域(たとえばアプタマー)結合に応答して、U1 snRNP結合部位のU1 snRNPへのアクセス可能度を低下させるステム構造(二本鎖領域)を形成するRNA配列を含む。エフェクター領域は、U1 snRNP結合部位及びこのU1 snRNP結合部位の相補配列を含む。アプタマーがそのリガンドに結合すると、エフェクター領域はステムを形成し、したがってU1 snRNP結合部位はU1 snRNPと結合できなくなる。特定の条件下では(たとえば、アプタマーがそのリガンドと結合していない場合)、エフェクター領域はU1 snRNP結合部位へのアクセスを提供する状況にあり、U1 snRNPがmRNAに結合してポリアデニル化を阻害するのを許容し、その結果メッセージは劣化することになる。
一実施形態では、センサー領域はアプタマーを含む。本明細書では、「アプタマー」という用語は、リガンドに特異的に結合するRNAポリヌクレオチドを指す。「リガンド」という用語は、アプタマーが特異的に結合する分子を指す。一実施形態では、リガンドは低分子量(約1,000ダルトン未満)分子であり、たとえば、脂質、モノサッカライド、二次メッセンジャー、補助因子、金属イオン、他の天然産物及び代謝物、核酸、ならびにほとんどの治療薬が挙げられる。一実施形態では、リガンドは、2つ以上のヌクレオチド塩基を有するポリヌクレオチドである。
一実施形態では、アプタマーは、特定の小分子リガンドに結合するように設計される。特定のリガンドに結合するアプタマーを設計し選択する方法は、62/370,599(参照により本明細書に援用する)に開示されている。アプタマーをスクリーニングする他の方法としては、たとえばSELEXが挙げられる。SELEXを用いて、選択的に小分子に結合するアプタマーを設計する方法は、たとえば、米国特許第5,475,096号、同第5,270,163号、及びAbdullah Ozer, et al. Nuc. Aci. 2014で開示されており、これらを参照により本明細書に援用する。SELEX法の改造が米国特許第5,580,737号及び同第5,567,588号で開示されており、これらを参照により本明細書に援用する。
本発明の遺伝子制御カセットは、標的細胞、組織、または生物で発現し得るあらゆる標的遺伝子の発現を制御するのに用いることができるプラットフォームである。「標的遺伝子」という用語は、細胞に導入され、RNAに転写され翻訳され、かつ/または適切な条件下で発現できるポリヌクレオチドを指す。あるいは、標的遺伝子は標的細胞に内在し、本発明の遺伝子制御カセットは標的遺伝子内(たとえば内在性標的遺伝子の5’または3’UTR)に配置される。標的遺伝子の一例は、治療用ポリペプチドをコードするポリヌクレオチドである。別の実施形態では、標的遺伝子は、miRNA、rRNA、小型または長鎖ノンコーディングRNA、低分子ヘアピン型RNA(shRNA)、及びあらゆる他の制御性RNAなどのRNAをコードする。一実施形態では、標的遺伝子は、組換えDNAコンストラクトが内部で転写されることになる細胞にとって外来性である。別の実施形態では、標的遺伝子は、組換えDNAコンストラクトが内部で転写されることになる細胞に内在する。
本発明では、標的遺伝子をコードするポリヌクレオチドを標的細胞に導入するための、本明細書で説明する遺伝子制御カセットを含む、組換えベクターの使用が意図される。多くの実施形態では、本発明の組換えDNAコンストラクトは、宿主細胞内でDNAを複製させ、該細胞内で適切なレベルで標的遺伝子を発現させるDNAセグメントを含む追加のDNAエレメントを含む。当業者であれば、発現制御配列(プロモーター、エンハンサーなど)は、標的細胞における標的遺伝子の発現を促進する能力に基づき選択されることを理解しよう。「ベクター」は、インビトロまたはインビボで宿主細胞内に送達されるポリヌクレオチドを含む、組換えプラスミド、酵母人工染色体(YAC)、ミニ染色体、DNAミニサークル、またはウイルス(ウイルス由来の配列も含む)を意味する。一実施形態では、組換えベクターは、ウイルスベクター、または複数のウイルスベクターの組合せである。
一態様では、本発明は、(a)本発明の遺伝子制御カセットを標的遺伝子の3’UTRに挿入すること、(b)該遺伝子制御カセットを含む該標的遺伝子を細胞に導入すること、及び(c)該細胞を、該アプタマーに結合するリガンドに曝露することによって、該標的遺伝子(たとえば治療用遺伝子)の発現を調節する方法を提供する。一実施形態では、リガンドは小分子である。諸態様では、標的細胞における標的遺伝子の発現は、それが導入された細胞に所望の特性を与えるか、そうではなく所望の治療結果をもたらす。
本発明の一態様は、遺伝子治療により送達される治療用タンパク質のレベルを制御する方法を提供する。この実施形態では、「標的遺伝子」が治療用タンパク質をコードする場合がある。「標的遺伝子」は細胞に内在する、または外来性のタンパク質をコードする場合がある。
本明細書で説明する方法で使用されるキットまたは製品も提供される。諸態様では、キットは、好適な包装材に包まれた本明細書で説明する組成物(たとえば、遺伝子制御カセットを含む標的遺伝子を含むベクターの送達用組成物)を含む。本明細書で説明する組成物(眼内注入用の組成物など)用の好適な包装材は当業界で知られており、たとえば、バイアル(密封バイアルなど)、容器、アンプル、ボトル、瓶、柔らかい包装材(たとえば、密封Mylarまたはプラスチック袋)などが挙げられる。これらの製品はさらに滅菌され、かつ/または密封される場合がある。
3’UTR内のU1結合部位の位置及びコピー数が標的遺伝子発現に及ぼす効果
3’UTR内のU1結合配列の長さが標的遺伝子発現に及ぼす効果
3’UTR内のU1部位でのステム−ループ二次構造形成が遺伝子発現に及ぼす効果
U1のポリアデニル化干渉の調節により標的遺伝子発現を制御するためのテオフィリン・アプタマーの使用
アプタマー/リガンド結合によるU1アクセス可能度の制御性を高めるためのステム配列最適化
複数のU1_theoリボスイッチが標的遺伝子発現の制御に及ぼす影響
U1干渉の調節により標的遺伝子発現を制御するためのxpt−グアニン・アプタマーの使用
ポリA配列に特異的ではないアプタマーによるU1干渉の調節
Claims (25)
- リボスイッチを含む、標的遺伝子の発現を制御するポリヌクレオチド・カセットであって、前記リボスイッチは、エフェクター領域及びアプタマーを含み、前記エフェクター領域は、U1 snRNP結合部位及びこのU1 snRNP結合部位の相補配列を含む、前記ポリヌクレオチド・カセット。
- 前記アプタマーは、小分子リガンドに結合する、請求項1に記載のポリヌクレオチド・カセット。
- 前記エフェクター配列は、前記アプタマーがリガンドに結合するとステムを形成できる追加配列を含む、請求項1または2に記載のポリヌクレオチド・カセット。
- 前記エフェクター領域は、9〜11塩基対であるステム形成配列を含む、請求項3に記載のポリヌクレオチド・カセット。
- 前記エフェクター領域は、前記ステムに1つ以上のミスマッチ塩基を有するステム形成配列を含む、請求項4に記載のポリヌクレオチド・カセット。
- 前記U1 snRNP結合部位は8〜10ヌクレオチドである、請求項1〜5のいずれか1項に記載のポリヌクレオチド・カセット。
- 前記U1 snRNP結合部位は、配列CAGGTAAGを含む、請求項1〜5のいずれか1項に記載のポリヌクレオチド・カセット。
- 前記U1 snRNP結合部位は、CAGGTAAGTA、CAGGTAAGT、及びCAGGTAAGからなる群より選択される、請求項1〜5のいずれか1項に記載のポリヌクレオチド・カセット。
- 2つ以上のリボスイッチを含み、各リボスイッチはエフェクター領域及びアプタマーを含み、前記エフェクター領域はU1 snRNP結合部位及びこのU1 snRNP結合部位の相補配列を含む、請求項1に記載のポリヌクレオチド・カセット。
- 前記2つ以上のリボスイッチはそれぞれ、同じリガンドに結合するアプタマーを含む、請求項9に記載のポリヌクレオチド・カセット。
- 前記2つ以上のリボスイッチは、異なるリガンドに結合する異なるアプタマーを含む、請求項9に記載のポリヌクレオチド・カセット。
- 標的遺伝子の発現を調節する方法であって、
a.請求項1〜11に記載のポリヌクレオチド・カセット1つ以上を標的遺伝子の3’UTRに挿入すること、
b.前記ポリヌクレオチド・カセットを含む前記標的遺伝子を細胞に導入すること、及び
c.前記細胞を、前記アプタマーに特異的に結合する、前記標的遺伝子の発現を増加させるのに有効な量のリガンドに曝露すること、
を含む、前記方法。 - 前記リガンドは小分子である、請求項12に記載の方法。
- 前記ポリヌクレオチド・カセットは、ポリアデニル化シグナルの5’側約87または約140ヌクレオチドのところに挿入される、請求項12または13に記載の方法。
- 前記ポリヌクレオチド・カセットは、ポリアデニル化シグナルの5’側約74、約110、または約149ヌクレオチドのところに挿入される、請求項12または13に記載の方法。
- 2つ以上のポリヌクレオチド・カセットが、前記標的遺伝子の3’UTRに挿入される、請求項12または13に記載の方法。
- 前記2つ以上のポリヌクレオチド・カセットは、異なる小分子リガンドに特異的に結合する異なるアプタマーを含む、請求項14に記載の方法。
- 前記2つ以上のポリヌクレオチド・カセットは、同じアプタマーを含む、請求項14に記載の方法。
- 前記2つ以上のポリヌクレオチド・カセットは、前記標的遺伝子の3’UTRの異なる位置に挿入される、請求項12〜16のいずれか1項に記載の方法。
- 前記ポリヌクレオチド・カセットを含む前記標的遺伝子は、前記標的遺伝子の発現のためにベクターに組み込まれている、請求項12〜19のいずれか1項に記載の方法。
- 前記ベクターはウイルスベクターである、請求項20に記載の方法。
- 前記ウイルスベクターは、アデノウイルスベクター、アデノ随伴ウイルスベクター、及びレンチウイルスベクターからなる群より選択される、請求項21に記載の方法。
- 請求項1〜11のいずれか1項に記載のポリヌクレオチド・カセットを含む標的遺伝子を含む、ベクター。
- 前記ベクターはウイルスベクターである、請求項23に記載のベクター。
- 前記ウイルスベクターは、アデノウイルスベクター、アデノ随伴ウイルスベクター、及びレンチウイルスベクターからなる群より選択される、請求項24に記載のベクター。
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AU2017213835B2 (en) | 2024-02-01 |
CA3048620A1 (en) | 2017-08-10 |
AU2017213835C1 (en) | 2024-04-18 |
US20240191239A1 (en) | 2024-06-13 |
US20200017858A1 (en) | 2020-01-16 |
PH12018501650A1 (en) | 2019-06-03 |
EP3411081A4 (en) | 2019-12-11 |
MX2018009370A (es) | 2018-11-12 |
CN109511259A (zh) | 2019-03-22 |
KR20180117630A (ko) | 2018-10-29 |
US11697815B2 (en) | 2023-07-11 |
SG11201806605RA (en) | 2018-09-27 |
EP3411081A1 (en) | 2018-12-12 |
MY197192A (en) | 2023-05-31 |
BR112018015819A2 (pt) | 2019-01-02 |
JP7184649B2 (ja) | 2022-12-06 |
AU2017213835A1 (en) | 2018-09-06 |
EA201891721A1 (ru) | 2019-02-28 |
WO2017136591A1 (en) | 2017-08-10 |
CN109511259B (zh) | 2023-10-20 |
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