JP6527149B2 - ベータ−サラセミアの処置のための方法及び医薬組成物 - Google Patents
ベータ−サラセミアの処置のための方法及び医薬組成物 Download PDFInfo
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- JP6527149B2 JP6527149B2 JP2016534904A JP2016534904A JP6527149B2 JP 6527149 B2 JP6527149 B2 JP 6527149B2 JP 2016534904 A JP2016534904 A JP 2016534904A JP 2016534904 A JP2016534904 A JP 2016534904A JP 6527149 B2 JP6527149 B2 JP 6527149B2
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Description
本発明は、ベータ−サラセミアの処置のための方法及び医薬組成物に関する。
成体哺乳動物のHgは、(α/β)2四量体ヘモグロビン(Hb)分子を一緒に形成する2本のαグロビン鎖と2本のβグロビン鎖を含む、多量体タンパク質である。ベータ−サラセミアは、ヘモグロビンのβ鎖の合成の定量的欠乏によって引き起こされる遺伝性血液障害の一群である。この障害を有する個体では、β−グロビン鎖の合成が減少しているか又は存在しない。この疾患の3つの主な形態が以下に記載される:β鎖が産生されない重症型β−サラセミア(β−TM又はβ0−TM)、並びにβ鎖が産生されるが正常な量よりも少ない中間型β−サラセミア及び軽症型β−サラセミア。これらの状態は、重症貧血〜臨床的に無症状の個体に及ぶ異なる表現型を引き起こす。β−TMを有する個体は、通常、人生の最初の2年以内に、重症貧血、成長不良及び幼年期の間の骨格異常を呈する。罹患した子供は、規則的な一生続く輸血を必要とするだろう。中間型β−サラセミアは、重症型β−サラセミアよりも重症度が低く、一時的な輸血を必要とし得る。輸血依存患者は、鉄過剰負荷を発症し、過剰な鉄を取り除くためにキレート療法を必要とするだろう。
本発明は、ベータ−サラセミアの処置のための方法及び医薬組成物に関する。特に、本発明は、特許請求の範囲によって定義される。
本発明は、この欠陥プロセスに介入するように、かつβ−TMに罹患している個体において赤血球成熟を促進又は回復するように設計された方法及び医薬組成物を提供する。β−TM赤血球ではβグロビンが形成されないので、本明細書に記載される方法及び組成物で処置された個体において産生される種類の赤血球は(α/γ)2Hbを含有すること、そして本発明がβ−TM細胞及びβ−TM個体において(α/γ)2Hb赤血球の産生を増大させるための方法及び組成物を提供することに注目されたい。本方法は、細胞質へのHSP70の核外輸送を防止することによってGATA−1の活性を維持することを包含する。したがって、本発明の目的は、GATA−1のタンパク質分解性不活性化を防止することによって重症型β−サラセミア(β−TM)に罹患している被験体における赤血球成熟を回復又は増大させる方法を提供することである。いくつかの実施態様において、防止することは、被験体にXPO1核内輸送体を阻害する化合物を投与することによって達成される。
及びその薬学的に許容し得る塩からなる群より選択される。
又はその薬学的に許容し得る塩からなる群より選択される。
からなる群より選択される。
背景
XPO1の化学阻害剤であるレプトマイシンB(LMB)が赤血球前駆体細胞中のHSP70の核内保持を誘導することを本発明者等の研究室が公表した(Ribeil et al., Nature 2007)。この観察は、XPO1が赤血球前駆体中のHSP70タンパク質の核外輸送に関与し得ることを示唆している。
材料
Obstetrics Unit of Hopital Necker-Enfants Maladesから、母親のインフォームドコンセントを得た後に正常満期産からの臍帯血単位を得た。臍帯血から単離された7日間のIL−6+IL3+SCFで培養したCD34前駆細胞から生成された、CD36+赤血球前駆細胞(Miltenyi CD34 Progenitor Cell Isolation Kit)を、15%BIT 9500(Stem Cell Technologies)を補充したIMDM(Gibco cell culture)中、IL3+SCF+Epoの存在下で培養した。
別個の細胞質フラクションと核タンパク質フラクションを、NE−PER核及び細胞質抽出試薬(Thermo Scientific)を使用して、製造業者のプロトコールに従って、赤血球前駆細胞から抽出した。
使用される抗体は、抗HDACマウスクローン3F3 #05−814(Millipore)、抗HSP70ウサギADI SPA 812(Enzo lifesciences)、及び抗CRM1(XPO1)ウサギ#ST1100(Calbiochem)である。
5.104個の細胞をスライド上にスピンオンし、アセトン固定し、冷1×PBS 1%BSAで30分間水和し、ホルムアルデヒド(Sigma)で15分間、次いで、メタノール(Prolabo)で10分間、室温で処理した。次いで、細胞を、4℃で、1×PBS 0,2%triton X100(Sigma)で10分間透過処理し、洗浄し、そして10%BSA中で30分間インキュベートした。次いで、これらを、1×PBS 1%BSA 0,1%tween(Sigma)で希釈した抗体で連続してインキュベートした。核をDAPIで染色し、スライドを共焦点レーザ顕微鏡(LSM 700 Carl Zeiss)で調べた。
本発明者等は、臍帯血からのCD36+赤血球前駆細胞中のXPO1タンパク質の発現をイムノブロット(図1)及び蛍光顕微鏡法(図2)によって調査した。図1では、培養の3日目(D3)〜6日目(D6)で、XPO1タンパク質は、大部分がCD36+赤血球前駆細胞の細胞質(C)中に存在し、核(N)分画においてはより程度が少ない。図2では、イムノブロッティングによって観察されたXPO1タンパク質の発現が、Epo中の培養の6日目に、透過処理したCD36+赤血球前駆細胞上で共焦点顕微鏡によって確認される。ここで、本発明者等は、CD36+赤血球前駆細胞中のXPO1(ベータインポーチンファミリーの核外輸送タンパク質)の発現を初めて報告する。
図6及び図7のデータは、ベータ−サラセミア患者からのCD36+細胞での2種の異なる実験のものである。図8のデータは、図7の実験からの細胞で遂行された。ベータ−サラセミア赤芽球を、重症型ベータ−サラセミア(β0−TM)を有する成人患者からの末梢血循環CD34+細胞からインビトロで生成した。この研究は、本発明者等の機関の倫理委員会の承認を得て、ヘルシンキ宣言(Helsinky Declaration)に従って遂行した。
本出願を通して、様々な参考文献が、本発明が関わる分野の最先端を記載している。これらの参考文献の開示は、参照によって本開示に組み入れられる。
Claims (14)
- GATA−1のタンパク質分解性不活性化を防止することによって重症型β−サラセミア(β−TM)に罹患している被験体における赤血球成熟を回復又は増大させる方法に用いられる医薬組成物であって、防止することが被験体にXPO1核内輸送体を阻害する化合物を投与することによって達成される方法に用いられるための医薬組成物であって、
XPO1核内輸送体を阻害する化合物を有効成分として含み、
XPO1核内輸送体を阻害する化合物が、以下の化合物:
及びその薬学的に許容し得る塩からなる群より選択される、XPO1核内輸送体を阻害する化合物を有効成分として含む医薬組成物。 - GATA−1のタンパク質分解性不活性化を防止することによって重症型β−サラセミア(β−TM)に罹患している被験体における赤血球成熟を回復又は増大させる方法に用いられる医薬組成物であって、防止することが被験体にXPO1核内輸送体を阻害する化合物を投与することによって達成される方法に用いられるための医薬組成物であって、
XPO1核内輸送体を阻害する化合物を有効成分として含み、
XPO1核内輸送体を阻害する化合物が、(Z)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−アクリル酸エチルエステル;(E)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−アクリル酸エチルエステル;(Z)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−アクリル酸イソプロピルエステル;(E)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−アクリル酸イソプロピルエステル;(Z)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−アクリル酸tert−ブチルエステル;(Z)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−アクリル酸tert−ブチルエステル;(E)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−N−フェニル−アクリルアミド;(E)−N−(2−クロロ−フェニル)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−アクリルアミド;(4−{(E)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−アクリロイルアミノ}−フェニル)−カルバミン酸tert−ブチルエステル;(E)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−N−(4−メトキシ−フェニル)−アクリルアミド;(E)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−N−メチル−N−フェニル−アクリルアミド;(E)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−N−メチル−N−フェニル−アクリルアミド;(E)−N−(4−アミノ−フェニル)−3−[3−(3−クロロ−フェニル)−[1,2,4]−トリアゾール−1−イル]−アクリルアミド及びその薬学的に許容し得る塩からなる群より選択される、XPO1核内輸送体を阻害する化合物を有効成分として含む医薬組成物。 - GATA−1のタンパク質分解性不活性化を防止することによって重症型β−サラセミア(β−TM)に罹患している被験体における赤血球成熟を回復又は増大させる方法に用いられる医薬組成物であって、防止することが被験体にXPO1核内輸送体を阻害する化合物を投与することによって達成される方法に用いられるための医薬組成物であって、
XPO1核内輸送体を阻害する化合物を有効成分として含み、
XPO1核内輸送体を阻害する化合物が、以下の化合物:
及びその薬学的に許容し得る塩からなる群より選択される、XPO1核内輸送体を阻害する化合物を有効成分として含む医薬組成物。 - GATA−1のタンパク質分解性不活性化を防止することによって重症型β−サラセミア(β−TM)に罹患している被験体における赤血球成熟を回復又は増大させる方法に用いられる医薬組成物であって、防止することが被験体にXPO1核内輸送体を阻害する化合物を投与することによって達成される方法に用いられるための医薬組成物であって、
XPO1核内輸送体を阻害する化合物を有効成分として含み、
XPO1核内輸送体を阻害する化合物が、1−(4−メトキシフェニル)−1H−ピロール−2,5−ジオン;1−(4−ブロモ−2,5−ジフルオロフェニル)−1H−ピロール−2,5−ジオン;3−メチル−1−(1−メチル−1H−ピラゾール−3−イル)−1H−ピロール−2,5−ジオン;4−(2,5−ジオキソ−2,5−ジヒドロ−1H−ピロール−1−イル)−N−(5−メチルイソオキサゾール−3−イル)ベンゼンスルホンアミド;1−(3−ベンゾイル−4−メチルチオフェン−2−イル)−1H−ピロール−2,5−ジオン;1−(4−(3−(トリフルオロメチル)−1H−ピラゾール−1−イル)フェニル)−1H−ピロール−2,5−ジオン;1−(4−(4−クロロフェニル)チアゾール−2−イル)−3−メチル−1H−ピロール−2,5−ジオン;1−(ベンゾ[b]チオフェン−3−イルメチル)−1H−ピロール−2,5−ジオン;1−(3,4−ジメトキシフェネチル)−1H−ピロール−2,5−ジオン;1−(ナフタレン−1−イル)−1H−ピロール−2,5−ジオン;1−(4−シクロヘキシルフェニル)−1H−ピロール−2,5−ジオン;1−(2−ベンゾイルフェニル)−1H−ピロール−2,5−ジオン;1−(4−モルホリノフェニル)−1H−ピロール−2,5−ジオン;1−(4−クロロフェネチル)−1H−ピロール−2,5−ジオン;1−(2−(チオフェン−2−イル)エチル)−1H−ピロール−2,5−ジオン;1−([3,4]メチレンジオキシベンジル)−1H−ピロール−2,5−ジオンアミドからなる群より選択される化合物及びその薬学的に許容し得る塩からなる群より選択される、XPO1核内輸送体を阻害する化合物を有効成分として含む医薬組成物。 - GATA−1のタンパク質分解性不活性化を防止することによって重症型β−サラセミア(β−TM)に罹患している被験体における赤血球成熟を回復又は増大させる方法に用いられる医薬組成物であって、防止することが被験体にXPO1核内輸送体を阻害する化合物を投与することによって達成される方法に用いられるための医薬組成物であって、
XPO1核内輸送体を阻害する化合物を有効成分として含み、
XPO1核内輸送体を阻害する化合物が、以下の化合物:
からなる群より選択される、XPO1核内輸送体を阻害する化合物を有効成分として含む医薬組成物。 - GATA−1のタンパク質分解性不活性化を防止することによって重症型β−サラセミア(β−TM)に罹患している被験体における赤血球成熟を回復又は増大させる方法に用いられる医薬組成物であって、防止することが被験体にXPO1核内輸送体を阻害する化合物を投与することによって達成される方法に用いられるための医薬組成物であって、
XPO1核内輸送体を阻害する化合物を有効成分として含み、
XPO1核内輸送体を阻害する化合物が、以下の式:
を有するKPT−330である、XPO1核内輸送体を阻害する化合物を有効成分として含む医薬組成物。 - GATA−1のタンパク質分解性不活性化を防止することによって重症型β−サラセミア(β−TM)に罹患している被験体における赤血球成熟を回復又は増大させる方法に用いられる医薬組成物であって、防止することが被験体にXPO1核内輸送体を阻害する化合物を投与することによって達成される方法に用いられるための医薬組成物であって、
XPO1核内輸送体を阻害する化合物を有効成分として含み、
XPO1核内輸送体を阻害する化合物が、以下の式:
を有するKPT−276である、XPO1核内輸送体を阻害する化合物を有効成分として含む医薬組成物。 - XPO1核内輸送体を阻害する化合物がXPO1阻害剤である、請求項1〜7のいずれか1項に記載の医薬組成物。
- 必要とする被験体におけるベータ−サラセミアを処置する方法に用いられる医薬組成物であって、被験体に治療有効量のXPO1阻害剤を投与することを含む方法に用いられるための医薬組成物であって、請求項8に記載のXPO1阻害剤を有効成分として含む医薬組成物。
- ベータ−サラセミアに罹患している被験体における赤血球成熟を促進又は回復させるための方法に用いられる医薬組成物であって、被験体に治療有効量のXPO1阻害剤を投与することを含む方法に用いられるための医薬組成物であって、請求項8に記載のXPO1阻害剤を有効成分として含む医薬組成物。
- ベータ−サラセミアに罹患している被験体における(α/γ)2Hb赤血球の産生を増大させるための方法に用いられる医薬組成物であって、被験体に治療有効量のXPO1阻害剤を投与することを含む方法に用いられるための医薬組成物であって、請求項8に記載のXPO1阻害剤を有効成分として含む医薬組成物。
- XPO1核内輸送体を阻害する化合物又はXPO1阻害剤が、XPO1発現の阻害剤である、請求項1〜11のいずれか1項に記載の医薬組成物。
- 遺伝子発現の阻害剤が、siRNA、アンチセンスオリゴヌクレオチド又はリボザイムである、請求項12に記載の医薬組成物。
- ベータ−サラセミアの処置に好適な薬物をスクリーニングするためのインビトロの方法であって、i)候補化合物を準備する工程、ii)XPO1活性又は発現を阻害する能力について候補化合物を試験する工程、及びiii)XPO1活性又は発現を阻害することが可能な候補化合物を選択する工程からなる工程を含む方法。
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