JP5328244B2 - 筋萎縮性側索硬化症治療剤 - Google Patents
筋萎縮性側索硬化症治療剤 Download PDFInfo
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- JP5328244B2 JP5328244B2 JP2008177279A JP2008177279A JP5328244B2 JP 5328244 B2 JP5328244 B2 JP 5328244B2 JP 2008177279 A JP2008177279 A JP 2008177279A JP 2008177279 A JP2008177279 A JP 2008177279A JP 5328244 B2 JP5328244 B2 JP 5328244B2
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- bromocriptine
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- bromocriptine mesylate
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Description
三本 博、「筋萎縮性側索硬化症(ALS)の治療戦略」、BRAIN and NERVE、2007年4月、第59巻、第4号、p.383−391 Traynor BJ, Bruijn L, Conwit R, Beal F, O’Neill G, et al、Neuroprotective agents for clinical trials in ALS : a systematic assessment、Neurology、67、20−27、2006
HeLa細胞(American Type Culture Collection,ATCC CCL2株)
ヒト神経芽細胞腫SH−SY5Y細胞(ATCC、CRL2266株)
培地:
HeLa細胞の培養;10% 牛胎児血清(FBS)、4mM グルタミン、100μg/ml ストレプトマイシン、100U/ml ペニシリンGを含むDMEM(SIGMA社)
ヒト神経芽細胞腫SH−SY5Y細胞の培地;10% 牛胎児血清(FBS)、100μg/ml ストレプトマイシン、100U/ml ペニシリンGを含むDMEM培地(SIGMA社)
試薬:
ジメチルスルホキシド(DMSO:SIGMA社)
メナジオン(SIGMA社)
アラマーブルー(AlamarBlue:Biosource international社)
全トランス型レチノイン酸(和光純薬工業株式会社)
カルボキシメチルセルロースナトリウム(カルメロースナトリウム、CMC−Na)(丸石製薬株式会社)
機器:
蛍光プレートリーダー(CYTOFLUOR(登録商標)Multi−Well Plate Reader Series 4000:PerSpective Biosystems社)
<細胞生存率試験1:非神経細胞での酸化ストレス性細胞死に対する解析>
(方法)
HeLa細胞を75cm2フラスコに1.0×106cells播種し、5% CO2存在下、37℃で16時間培養後、最終濃度が2.5、5、10μMになるようにメシル酸ブロモクリプチンと、10μM メシル酸ブロモクリプチン作製時添加量と同量のDMSOとを添加し、さらに24時間培養した(メシル酸ブロモクリプチン処理)。なお、DMSOのみを加えたものをコントロールとした。メシル酸ブロモクリプチン処理したHeLa細胞に、最終濃度が0、20、40、60、80μMになるようにメナジオンを添加し、5% CO2存在下、37℃で培養を継続した(酸化ストレス処理)。メナジオンの代わりに0.1% Triton X−100/DMEM/10% FBS溶液で処理したものをブランクとした。4時間の酸化ストレス処理後、10% アラマーブルーを含む培地に置換し、5% CO2存在下、37℃でさらに培養した。16時間の培養後、蛍光プレートリーダーを用い、励起波長530nm/検出波長580nmにおける蛍光量を測定することで、生細胞数を判定した。
図1に示すように、メシル酸ブロモクリプチンで前処理したHeLa細胞の生存率は、メナジオンによる酸化ストレス処理したコントロールの細胞生存率との比較から、メシル酸ブロモクリプチンの濃度に依存して増加を示した。このことから、メシル酸ブロモクリプチンが、酸化ストレスにより誘導される細胞死に対して抑制効果を有することがわかった。
<細胞生存率試験2:分化誘導した神経細胞での酸化ストレス性細胞死に対する解析>
(方法)
DMEM/10% FBS培地に懸濁したSH−SY5Y細胞を、1.0×104 cells/wellになるように96well マイクロプレートに播種し、5% CO2存在下、37℃で24時間培養した。その後、10μM 全トランス型レチノイン酸(RA)を含むDMEM/10% FBS(DMEM/FBS/RA)培地に置換し、5日目に最終濃度が5、10、20、40μMになるようにメシル酸ブロモクリプチンと、40μM メシル酸ブロモクリプチン作製時添加量と同量のDMSOとを添加し、さらに24時間培養した(メシル酸ブロモクリプチン処理)。なお、本実験ではDMSOのみを加えたものをコントロールとした。DMSO及びメシル酸ブロモクリプチン処理したSH−SY5Y細胞に、最終濃度が0、20、30、40、50μMになるようにメナジオンを添加し、5% CO2存在下、37℃で培養を継続した(酸化ストレス処理)。メナジオンの代わりに0.1% Triton X−100/DMEM/10% FBS溶液で処理したものをブランクとした。4時間の酸化ストレス処理後、10% アラマーブルーを含む培地に置換し、5% CO2存在下、37℃でさらに培養した。16時間の培養後、蛍光プレートリーダーを用い、励起波長530nm/検出波長580nmの蛍光量を測定することで、生細胞数を判定した。
図2に示すように、メシル酸ブロモクリプチンで前処理したSH−SY5Y細胞の生存率は、メナジオンによる酸化ストレス処理したコントロールの細胞生存率との比較から、メシル酸ブロモクリプチンの濃度に依存して増加を示した。このことから、メシル酸ブロモクリプチンは、分化誘導SH−SY5Y細胞においても、酸化ストレスにより誘導される細胞死に対して抑制効果を有することがわかった。
<in vivoでの薬効試験>
(方法)
本試験では、ALS1病変型SOD1遺伝子(SOD1H46R)を導入・発現するALS−SOD1H46Rトランスジェニックマウスを使用した。マウスは昼夜12時間サイクル、23℃の条件下で飼育した。メシル酸ブロモクリプチンは0.5% カルボキシメチルセルロースナトリウム(CMC−Na)に懸濁した。メシル酸ブロモクリプチンは、ALS−SOD1H46Rトランスジェニックマウスのバランスビームテストでの神経症候が確認された時点(発症)から投与を開始した。メシル酸ブロモクリプチンの各個体の体重当たり投与量は、10mg、1mg/kgとし、個体が死亡するまで1日1回腹腔内投与により行った(メシル酸ブロモクリプチン投与群)。0.5% CMC−Na(5ml/kg)のみを投与したマウスをコントロール群(メシル酸ブロモクリプチン非投与群)とした。神経症候の発現評価法には、バランスビームテスト(ステンレス製棒使用;50cm長、0.9cm幅)を用いた。評価基準として5段階のグレードを設定した。なお、グレード3を発症と定めた。以下に評価基準を示す。
グレード5:棒上を後肢の滑りがなく正常に渡る
グレード4:時々後肢を滑らせるが、棒上を渡る
グレード3:頻繁に後肢を滑らすが、棒上を何とか渡る
グレード2:棒上を歩こうとすると落下する
グレード1:棒上に乗れない
垂直昇降試験によるALS−SOD1H46Rトランスジェニックマウスの運動機能の保持能力は、投与開始時点(17週齢)ではメシル酸ブロモクリプチン投与群(10mg/kg)(n=5)及び非投与群(n=4)間で差は認められなかった(図3参照)。一方、21週齢時点には、メシル酸ブロモクリプチン投与群では運動機能が保持されていたが、非投与群では顕著な運動機能の低下が確認された(図3参照)。このことから、メシル酸ブロモクリプチン投与により生活の質(QOL)が向上されることが明らかとなった。
発症後(発症日:125.9±2.8日)の生存期間については、非投与群では27.8±2.1日(n=4)であったが、メシル酸ブロモクリプチン投与群では35.3±6.0日(n=4)(1mg/kg)、38.0±2.9日(n=5)(10mg/kg)であり、メシル酸ブロモクリプチン投与群で有意な投与量依存的な延命効果が認められた(図4参照)。
Claims (2)
- ブロモクリプチン又はその薬理上許容し得る塩を有効成分として含有する筋萎縮性側索硬化症治療剤。
- 前記ブロモクリプチンの塩が、メシル酸塩である請求項1に記載の筋萎縮性側索硬化症治療剤。
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JP2008177279A JP5328244B2 (ja) | 2008-07-07 | 2008-07-07 | 筋萎縮性側索硬化症治療剤 |
PCT/JP2009/060918 WO2010004837A1 (ja) | 2008-07-07 | 2009-06-16 | 筋萎縮性側索硬化症治療剤 |
US13/001,871 US20110105517A1 (en) | 2008-07-07 | 2009-06-16 | Therapeutic agent for amyotrophic lateral sclerosis |
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MX2017006216A (es) | 2014-11-14 | 2018-08-29 | Voyager Therapeutics Inc | Composiciones y métodos para tratar la esclerosis lateral amiotrófica (ela). |
CA3061652A1 (en) | 2017-05-05 | 2018-11-08 | Voyager Therapeutics, Inc. | Compositions and methods of treating amyotrophic lateral sclerosis (als) |
JP7502991B2 (ja) | 2017-10-16 | 2024-06-19 | ボイジャー セラピューティクス インコーポレイテッド | 筋萎縮性側索硬化症(als)の治療 |
WO2019079242A1 (en) | 2017-10-16 | 2019-04-25 | Voyager Therapeutics, Inc. | TREATMENT OF AMYOTROPHIC LATERAL SCLEROSIS (ALS) |
EP3818161A1 (en) | 2018-07-02 | 2021-05-12 | Voyager Therapeutics, Inc. | Treatment of amyotrophic lateral sclerosis and disorders associated with the spinal cord |
WO2020010035A1 (en) | 2018-07-02 | 2020-01-09 | Voyager Therapeutics, Inc. | Cannula system |
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