JP2022514695A - レシニフェラトキシンを投与することによってパーキンソン病を処置するための方法 - Google Patents
レシニフェラトキシンを投与することによってパーキンソン病を処置するための方法 Download PDFInfo
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Abstract
Description
本開示は、パーキンソン病(PD)を処置するための方法であって、有効量のレシニフェラトキシン(RTX)を髄腔内または大槽内投与によって投与することを含む方法を提供する。
RTXは、トウガラシの主要な辛味成分であるカプサイシンの超強力類似体として作用する。RTXは、Euphorbiaのある特定の種から単離される三環式ジテルペンである。ホモバニリル基がカプサイシンの重要な構造的特色であり、また、レシニフェラトキシンと典型的なホルボール関連化合物を区別する最も顕著な特色である。天然のRTXは以下の構造を有する:
機能亢進性淡蒼球および視床下核を標的とする進行した薬剤抵抗性パーキンソン病の管理には定位的外科手術(神経画像処理および電気生理学的記録により補助される)が使用されている。コンピュータ断層撮影法または磁気共鳴画像法による脳イメージングの補助を用い、脳地図を参照として使用して電極またはプローブを脳内に設置する。パーキンソン病の運動障害(motor disorder)を処置するために淡蒼球の異なる部分(すなわち、後腹側淡蒼球)、大脳基底核、視床および視床下核の破壊が行われている。残念ながら、外科的脳破壊では、発語、視覚および認知脳領域の機能障害のリスクが生じる。薬物抵抗性パーキンソン病振戦を処置するためには、外科的アブレーションまたは刺激に加えて、外部放射線療法(Gamma Knife Radiosurgery)も限られた程度に使用されている。この手順の欠点は、振戦の減少が放射線外科療法後1週間後から8カ月後の間に遅延すること、および長期的利益ならびに放射線副作用が現在のところ分かっていないことである。
したがって、当技術分野において、パーキンソン病に対する改善された処置が必要とされている。
定義
本明細書で使用される場合、「髄腔内に」または「髄腔内投与」とは、薬物または医薬製剤をくも膜下腔としても公知の髄腔内空間の脳脊髄液中に送達することを指す。
典型的な方法および使用のための組成物
パーキンソン病様(PD)病態のAAV-A53Tマウスモデルに対するRTXの単回髄腔内投与の効果
パーキンソン病(PD)についてのin vivoマウス試験を使用し、まず、8週齢のC57Bl/6J雄マウスにおいて、脳の右半球の黒質(SN)への片側性アデノウイルスベクター(AAV)注入によって疾患状態を誘導した。ベクターは、黒質のドーパミン作動性ニューロンの変性および線条体におけるドーパミンレベルの低下を導く突然変異型ヒトA53T-アルファ-シヌクレインを過剰発現するように構成された構築物を含有していた。これにより、運動障害(motor deficit)を含めたPD様症状が導かれることが示されている。
群1:雄マウス10匹に、AAV-ヌルを用いてニセ注入を行い、D7にビヒクルを投与した。
群2:雄マウス15匹に、AAV-A53Tを注入し、D7にビヒクルを投与した。
群3:雄マウス15匹に、AAV-A53Tを注入し、D7に0.04μgのRTXを投与した。
群4:雄マウス15匹に、AAV-A53Tを注入し、D7に0.125μgのRTXを投与した。
群5:雄マウス10匹に、AAV-ヌルを用いてニセ注入を行い、D14にビヒクルを投与した。
群6:雄マウス15匹に、AAV-A53Tを注入し、D14にビヒクルを投与した。
群7:雄マウス15匹に、AAV-A53Tを注入し、D14に0.04μgのRTXを投与した。
群8:雄マウス15匹に、AAV-A53Tを注入し、D14に0.125μgのRTXを投与した。
(実施例2)
左右非対称を説明する歩行の分析
Claims (13)
- パーキンソン病(PD)を処置するための方法であって、PDの処置を必要とする対象に有効量のレシニフェラトキシン(RTX)を髄腔内または大槽内投与することを含む方法。
- パーキンソン病(PD)の処置を必要とする対象を処置する方法における使用のための、レシニフェラトキシン(RTX)を含む組成物。
- 前記方法が、前記組成物を前記対象に髄腔内または大槽内投与することを含む、請求項2に記載の使用のための組成物。
- 前記対象がヒト成体である、請求項1に記載の方法または請求項2または3に記載の使用のための組成物。
- 前記RTXが、約0.1μgから約100μgの用量で投与される、前記請求項のいずれか一項に記載の方法または使用のための組成物。
- 前記用量が、約0.1μgから約1μg、約1μgから約5μg、約5μgから約10μg、約10μgから約20μg、約20μgから約50μg、または約50から約100μgである、請求項5に記載の方法または使用のための組成物。
- 前記方法が、髄腔内投与を含む、前記請求項のいずれか一項に記載の方法または使用のための組成物。
- 前記方法が、大槽内投与を含む、請求項1から6のいずれか一項に記載の方法または使用のための組成物。
- 前記RTXが、前記RTXおよび薬学的に許容される担体を含む医薬製剤で投与される、前記請求項のいずれか一項に記載の方法または使用のための組成物。
- 前記薬学的に許容される担体が、水を含む、請求項9に記載の方法または使用のための組成物。
- 前記薬学的に許容される担体が、生理食塩水を含む、請求項9に記載の方法または使用のための組成物。
- 前記RTXが、前記医薬製剤中に1μg/mlから100μg/mlの範囲の濃度で存在する、請求項9から11のいずれか一項に記載の方法または使用のための組成物。
- 前記RTXが、前記医薬製剤中に1μg/mlから5μg/ml、5μg/mlから10μg/ml、10μg/mlから20μg/ml、20μg/mlから50μg/ml、または50μg/mlから100μg/mlの範囲の濃度で存在する、請求項12に記載の方法または使用のための組成物。
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