JP2020510447A - 筋ジストロフィーを治療するためのマイクロジストロフィン断片のアデノ随伴ウイルスベクター送達 - Google Patents
筋ジストロフィーを治療するためのマイクロジストロフィン断片のアデノ随伴ウイルスベクター送達 Download PDFInfo
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Abstract
Description
複数の研究により、筋肉内での長期(1.5年超)の組換えAAV媒介タンパク質発現が実証されている。Clark et al.,Hum Gene Ther,8:659−669(1997)、Kessler et al., Proc Nat. Acad Sc.USA,93:14082−14087(1996)、およびXiao et al.,J Virol,70:8098−8108(1996)を参照されたい。Chao et al.,Mol Ther,2:619−623(2000)およびChao et al.,Mol Ther,4:217−222(2001)も参照されたい。さらに、筋肉は高度に血管が新生されるため、Herzog et al.,Proc Natl Acad Sci USA,94:5804−5809(1997)およびMurphy et al.,Proc Natl Acad Sci USA,94:13921−13926(1997)に記載されているように、筋肉内注射後に組換えAAV形質導入は、トランス遺伝子産物の全身循環をもたらす。さらに、Lewis et al.,J Virol,76:8769−8775(2002)は、骨格筋繊維が正しい抗体のグリコシル化、折り畳み、および分泌に必要な細胞因子を有することを実証し、筋肉が分泌タンパク質治療薬を安定して発現できることを示している。
これらの方法は、マイクロジストロフィンを発現するrAAVを投与するステップをさらに含んでもよい。
AAV
[実施例]
pAAV.MHCK7.マイクロジストロフィン.C末端プラスミドは、AAV2逆方向末端反復配列(ITR)が隣接するヒトマイクロジストロフィンcDNA発現カセットを含んだ。マイクロジストロフィンカセットは、細胞シグナル伝達イベントに重要な内因性結合パートナー(シントロフィン、α−ジストロブレビン、nNOS)への結合を可能にするジストロフィンのC末端ドメインを含んだ。このカセットを使った最初の作業は、心臓送達に焦点を合わせ、M260プロモーターとAAV9を利用した。心臓において非常に良好な発現および機能が達成されたが、骨格筋においてはほとんど発現しなかった(Straub&Campbell、Curr Opin Neurol 10、168−175(1997))。
発現研究は、C末端カセット(rAAVrh.74.MHCK7.マイクロジストロフィン.C末端)を含むこのヒトマイクロジストロフィンを用いて筋肉内注射より行われた。mdxマウスの前脛骨筋に1x1011vgまたは3x1011vgで注射した(n=5/群)。6週間後、筋肉を採取し、C末端ポリクローナル抗体で染色することによりジストロフィンの発現を調べた。用量研究の結果を図2に示す。1e11および3e11vgでの比較投与において、低用量と高用量の両方で良好な遺伝子発現が達成されたとしている。C末端ポリクローナル抗体によるジストロフィンの免疫組織染色は、用量依存的な発現を示した(図3)。
mdxマウスのコホートに、rAAVrh.74.MHCK7.マイクロジストロフィン.C末端を6e12vg(2e14vg/kg)で注射した。全身注射(尾静脈)されたmdxマウス(n=5)は、すべての筋肉において高いレベルの染色を示した。図4は、6e12vgでの全身投与後の心筋線維の広範な形質導入を表す。6週間の治療後、すべての筋肉を採取し、ジストロフィン陽性線維の数を定量化した(表1)。
Claims (25)
- 配列番号1のヌクレオチド配列を含む組換えAAVベクター。
- 筋特異的制御エレメントをさらに含む、請求項1に記載の組換えAAVベクター。
- 前記筋特異的制御エレメントが、ヒト骨格アクチン遺伝子エレメント、心臓アクチン遺伝子エレメント、筋細胞特異的エンハンサー結合因子mef、筋肉クレアチンキナーゼ(MCK)、切断型MCK(tMCK)、ミオシン重鎖(MHC)、ハイブリッドα−ミオシン重鎖エンハンサー/MCKエンハンサープロモーター(MHCK7)、C5−12、マウスクレアチンキナーゼエンハンサーエレメント、急収縮性骨格トロポニンC遺伝子エレメント、遅収縮性心筋トロポニンC遺伝子エレメント、遅収縮性トロポニンI遺伝子エレメント、低酸素誘導性核因子、ステロイド誘導性エレメントまたは糖質コルチコイド応答エレメント(GRE)である、請求項2に記載の組換えAAVベクター。
- 配列番号2のヌクレオチド配列を含む、請求項1〜3のいずれか一項に記載の組換えAAVベクター。
- 配列番号2のヌクレオチド配列を含む、組換えAAVベクター。
- 前記ベクターが、血清型AAVrh.74、AAV1、AAV2、AAV4、AAV5、AAV6、AAV7、AAV8、AAV9、AAV10、AAV11、AAV12またはAAV13である、請求項1〜5のいずれか一項に記載の組換えAAVベクター。
- 請求項1〜6のいずれか一項に記載の組換えAAVベクターおよび担体を含む組成物。
- 請求項1〜6のいずれか一項に記載の組換えAAVベクターまたは請求項7に記載の組成物の治療有効量を投与することを含む、筋ジストロフィーに罹患している患者の筋力または筋肉量を増加させる方法。
- 請求項1〜6のいずれか一項に記載の組換えAAVベクターまたは請求項7に記載の組成物の治療有効量を投与することを含む、筋ジストロフィーを治療する方法。
- 前記筋ジストロフィーがデュシェンヌ型筋ジストロフィーである、請求項8または9に記載の方法。
- 前記組換えAAVベクターまたは前記組成物が、筋肉内注射または静脈内注射によって投与される、請求項8〜10のいずれか一項に記載の方法。
- 前記組換えAAVベクターまたは前記組成物が全身に投与される、請求項8〜10のいずれか一項に記載の方法。
- 前記組換えAAVベクターまたは前記組成物が、注射、注入または移植により非経口投与される、請求項12に記載の方法。
- 筋ジストロフィーに罹患している患者の筋力または筋肉量を増加させるための、請求項1〜6のいずれか一項に記載の組換えAAVベクターを含む組成物。
- 筋ジストロフィーを治療するための、請求項1〜6のいずれか一項に記載の組換えAAVベクターを含む組成物。
- 前記筋ジストロフィーがデュシェンヌ型筋ジストロフィーである、請求項14または15に記載の組成物。
- 筋肉内注射または静脈内注射用に製剤化される、請求項14〜16のいずれか一項に記載の組成物。
- 前記組換えAAVベクターまたは前記組成物は全身的に投与される、請求項14〜16のいずれか一項に記載の組成物。
- 前記組換えAAVベクターまたは前記組成物は、注射、注入または移植により非経口投与される、請求項18に記載の方法。
- 筋ジストロフィーに罹患している患者の筋力または筋肉量を増加させる薬剤の調製のための、請求項1〜6のいずれか一項に記載の組換えAAVベクターまたは請求項7に記載の組成物の使用。
- 筋ジストロフィー治療薬の調製のための、請求項1〜6のいずれか一項に記載の組換えAAVベクターまたは請求項7に記載の組成物の使用。
- 前記筋ジストロフィーがデュシェンヌ型筋ジストロフィーである、請求項20または21のいずれか一項に記載の使用。
- 前記薬剤が筋肉内または静脈内投与用に製剤化される、請求項20〜22のいずれか一項に記載の使用。
- 前記薬剤が全身送達用に製剤化される、請求項20〜22のいずれか一項に記載の使用。
- 前記薬剤が、注射、注入または移植による非経口投与用に製剤化される、請求項24に記載の使用。
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- 2018-03-16 EP EP18811911.9A patent/EP3596112A2/en active Pending
- 2018-03-16 US US16/494,645 patent/US11338045B2/en active Active
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- 2018-03-16 WO PCT/IB2018/001201 patent/WO2019012336A2/en active Application Filing
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2022
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JP7493566B2 (ja) | 2024-05-31 |
JP7162021B2 (ja) | 2022-10-27 |
WO2019012336A2 (en) | 2019-01-17 |
JP2022185154A (ja) | 2022-12-13 |
US20200078473A1 (en) | 2020-03-12 |
MA47800A (fr) | 2020-01-22 |
US20230049491A1 (en) | 2023-02-16 |
EP3596112A2 (en) | 2020-01-22 |
US11338045B2 (en) | 2022-05-24 |
WO2019012336A3 (en) | 2019-03-07 |
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