JP2022113802A - 心不全の治療方法 - Google Patents
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Abstract
Description
本出願は、2015年12月23日に出願された豪国特許出願第2014905243号に対する優先権を主張し、その内容全体を参照により本明細書に援用する。
i)70mLを超える大きいLVESVを有する被検者を選択するステップ、ならびに
ii)被検者に間葉系幹細胞もしくは前駆細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子を投与するステップ
を含む。
i)心不全の被検者(複数可)を診断するステップ;
ii)70mLを超える大きいLVESVを有する診断した被検者のコホートを選択するステップ;ならびに
iii)被検者(複数可)に間葉系幹細胞もしくは前駆細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子を投与するステップ
を含む。
用語「and/or(及び/または)」、例えば「X and/or Y(X及び/またはY)」は、「X and Y(X及びY)」または「X or Y(XまたはY)」のいずれかを意味すると解釈するものとし、両方の意味またはいずれかの意味に対する明示的な支持を与えるとみなすものとする。
本明細書で用いる場合、用語「間葉系前駆細胞または幹細胞」は、多分化能を維持しながら自己複製する能力ならびに間葉起源、例えば、骨芽細胞、軟骨細胞、脂肪細胞、間質細胞、線維芽細胞、及び腱、または非間葉起源、例えば、肝細胞、神経細胞及び上皮細胞の複数の細胞型いずれにも分化する能力を有する未分化複能性細胞のことをいう。誤解を避けるために記すと、「間葉系前駆細胞」は、間葉細胞、例えば骨、軟骨、筋及び脂肪細胞、ならびに線維性結合組織などに分化することができる細胞のことをいう。
間葉系前駆細胞または幹細胞はオートロガス、ゼノジェニック、シンジェニックまたはアイソジェニックとすることができる。オートロガス細胞は、再移植する同一個体から単離される。アロジェニック細胞は、同種のドナーから単離される。ゼノジェニック細胞は、異種のドナーから単離される。シンジェニックまたはアイソジェニック細胞は、遺伝的に同一な生物、例えば双生児、クローン、または高度近交系研究動物モデルなどから単離される。
一例において、本開示の間葉系前駆細胞または幹細胞は、遺伝子改変してもよく、遺伝子改変しなくてもよく、Ang1を少なくとも0.1μg/106細胞の量で発現し得る。しかし、様々な例において、本開示の間葉系幹細胞または前駆細胞は、Ang1を少なくとも0.2μg/106細胞、0.3μg/106細胞、0.4μg/106細胞、0.5μg/106細胞、0.6μg/106細胞、0.7μg/106細胞、0.8μg/106細胞、0.9μg/106細胞、1μg/106細胞、1.1μg/106細胞、1.2μg/106細胞、1.3μg/106細胞、1.4μg/106細胞、1.5μg/106細胞の量で発現し得ることが想定される。
心不全は、心臓が体の要求を満足する血流を維持するために十分にポンプすることができない場合に生じる。心不全の原因の1つは心筋梗塞(MI)である。MIは、血液が心臓のある部分へ適切に流れなくなる場合に生じる。血液供給不足の結果、梗塞または梗塞形成と呼ばれる局部的な心筋壊死が生じる。梗塞した心臓は、体の要求を満足する血流を維持するために十分にポンプすることができず、心不全に至る。MI後、一連の代償機序が開始され、心拍出量の低下を緩衝するように働き、重要器官に灌流するために十分な血圧を維持するのを補助する。その結果、心不全を有する患者は長期間進行が見られない場合がある。しかし、代償機序は最終的には損傷した心臓を補償できなくなり、結果として心拍出量の進行性低下が生じるが、これは「進行性心不全」と称される。
患者予後及び心機能は梗塞した左室(LV)の量と関係があることが一般に知られている。
被検者の心筋または心臓組織損傷の領域付近の部位への、間葉系前駆細胞もしくは幹細胞及び/またはその子孫細胞及び/またはそれに由来する可溶性因子、またはそれを含む組成物の注入を可能とする任意のカテーテルベース送達システムを、本開示の方法の実施に用いることができる。特定の例において、カテーテルは、経皮的に(例えば大腿動脈または別の血管内に)導入され、血管系を通して被検者の心筋まで到達させ、そこでカテーテルの先端から突出したニードルを介して、間葉系前駆細胞もしくは幹細胞及び/またはその子孫細胞及び/またはそれに由来する可溶性因子、またはそれを含む組成物を送達するために用いられる。他の例では、外科的小切開(例えば肋骨の間の切開を伴う限局的開胸術)を通して心臓にカテーテルを到達させる。
本開示の一例において、間葉系前駆細胞もしくは幹細胞及び/またはその子孫細胞及び/またはそれに由来する可溶性因子を組成物の形態で投与する。一例において、そのような組成物は医薬品として許容可能な担体及び/または賦形剤を含む。
6分間歩行試験(6MWT)は、慢性呼吸器疾患及び心不全における運動耐容能を評価するために1963年に開発された(Balke B et al (1963) Rep Civ Aeromed Res Inst US 53:1-8)。この試験では、被検者が合計6分間に堅い平面上を歩くことができる距離を測定する。目的は被検者が6分間で可能な限り長く歩くことである。被検者は、印をつけた歩行路に沿って往復する間、自分のペースで歩き、必要に応じて休息することができる。
虚血性または非虚血性病因のいずれかによる左室収縮機能障害に起因する心不全の被検者において、投与量を3段階で増加させた場合(2,500万、7,500万または1億5,000万細胞)の、間葉系前駆細胞(MPC)の安全性及び忍容性を評価するための研究を行った。副次目的は、複数のパラメータによって有効性を調べ、最適な有効投与量及びMPC治療の最適な対象集団を特定することであった。
1億5,000万MPCの投与量に対する最も適切な対象集団を特定するために、本発明者らは、心不全がある程度進行した群の中にMPC療法に対する最適な反応者がいるかどうかを評価した。著しい心筋収縮異常及び進行性心不全の代用として、ベースラインLVESVが100ml未満のもの、またはこれを超えるもののいずれかに対照または1億5,000万MPC治療患者を層別化して、さらなる事後解析を盲検化して行った。100mlのLVESV閾値を選択した理由は、正常LVESVより高い3標準偏差を超えたところにあるためである。
合計30人の被検者(心不全及び非心不全被検者を合わせた)のベースラインLVESVレベルを評価した。被検者の分布を表2に示す。被検者をプラセボ群またはMPC細胞群(1.5×108間葉系前駆細胞(MPC)を投与)に分類した。注入は、J&J Myostar注入カテーテル及び電圧に基づいて生存/冬眠心筋を特定するNOGASTARマッピングカテーテルシステムを用いて左室に行った(0.2ml/注入で約15~20回の注入)。左室収縮末期容積(LVESV)値≦100mLまたは>100mLいずれかに基づいて被検者を層別化した。
表3は、心不全MACE発生率(HF-MACE)を数値及びパーセンテージ値で示す。
100mL以下(≦)または>100mlのLVESV値に従って層別化した被検者において、左室拡張末期容積(LVEDV)も評価した。
70ml~120mlのベースラインLVESVの10ごとの感受性解析によって、100mlを超えるLVESVを用いた層別化に見られた知見が確証された。
対照及び1億5,000万MPCを与えた被検者において治療の36か月後にHF-MACEを調べた。36か月のフォローアップの間のHF-MACEイベントはすべて進行性心不全の対照に限って発生した(図12)。
本明細書に示したデータから、左室収縮機能障害に起因する慢性心不全の被検者におけるベースライン左室収縮異常の重症度が大きいほど、6か月のフォローアップ期間に観察されるMPC関連心臓保護効果がより有益となることが実証される。本データはさらに、進行性慢性心不全に関連する進行性有害事象の自然史をMPCでの治療によって有益な方向に変化させることができることを実証している。理論に縛られることを望むものではないが、本知見は、組織レベルの生化学的/生理学的障害が有益なパラクリン媒介物のMPC放出を促進する局所環境を形成するというパラクリンクロストーク仮説の裏付けとなる。したがって、心不全被検者におけるMPCの投与によって得られる最大限の効果は、疾患進行のリスクが最も高い被検者、すなわちベースラインLVESV>70mLの被検者で見られる。
Claims (32)
- 70mLを超える大きい左室収縮末期容積(LVESV)を有する被検者に、間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子を投与することを含む、必要とする被検者における心不全の治療または予防方法。
- 前記大きいLVESVが急性心筋梗塞に起因する、請求項1に記載の方法。
- 前記大きいLVESVが慢性うっ血性心不全に起因する、請求項1に記載の方法。
- i)70mLを超えるLVESVを有する被検者を選択するステップ、ならびに
ii)前記被検者に間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子を投与するステップ
を含む、請求項1~3のいずれか1項に記載の方法。 - 前記被検者が80mLを超えるLVESVを有する、先行請求項のいずれか1項に記載の方法。
- 前記被検者が90mLを超えるLVESVを有する、先行請求項のいずれか1項に記載の方法。
- 前記被検者が100mLを超えるLVESVを有する、先行請求項のいずれか1項に記載の方法。
- 前記被検者が110mLを超えるLVESVを有する、先行請求項のいずれか1項に記載の方法。
- カテーテルベースのシステムによって、前記被検者に前記細胞及び/またはその子孫細胞及び/または可溶性因子を投与する、先行請求項のいずれか1項に記載の方法。
- 経心内膜注入、冠動脈内点滴、静脈内点滴または経心外膜注入によって、前記被検者に前記細胞及び/またはその子孫細胞及び/または可溶性因子を投与する、請求項9に記載の方法。
- 前記被検者が約35%以下の左室駆出率(LVEF)を有するとして特徴づけられる、先行請求項のいずれか1項に記載の方法。
- 前記心不全が高血圧、心筋症(虚血性もしくは非虚血性)、心筋炎、肥満症、または糖尿病に起因する、請求項1に記載の方法。
- 心不全の診断の約1~7日後に、前記間葉系前駆細胞もしくは幹細胞及び/またはその子孫細胞及び/またはそれに由来する可溶性因子を前記被検者に投与する、先行請求項のいずれか1項に記載の方法。
- 前記被検者が左室の約5%~30%の梗塞サイズを有する、先行請求項のいずれか1項に記載の方法。
- 70mLを超えるLVESVを有する心臓における心不全の治療または予防方法であって、前記心臓に間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子を投与することを含む前記方法。
- 前記心臓が100mLを超えるLVESVを有する、請求項15に記載の方法。
- STRO-1+細胞が豊富な間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子を投与することを含む、先行請求項のいずれか1項に記載の方法。
- STRO-1bright細胞が豊富な間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子を投与することを含む、先行請求項のいずれか1項に記載の方法。
- 前記間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞を前記被検者または前記心臓に複数回にわたって投与する、先行請求項のいずれか1項に記載の方法。
- 約1.5×108細胞及び/またはその子孫細胞を投与することを含む、先行請求項のいずれか1項に記載の方法。
- 医薬品として許容可能な担体及び/または賦形剤とともに、組成物の形態で前記間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞を投与する、先行請求項のいずれか1項に記載の方法。
- 投与の前に及び/または前記可溶性因子を得る前に、前記間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞が培養で増殖している、先行請求項のいずれか1項に記載の方法。
- 70mLを超える大きいLVESVを有する被検者における心不全を治療するための、間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子またはその組成物の使用。
- 70mLを超える大きいLVESVを有する心臓を治療するための、間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子またはその組成物の使用。
- 前記大きいLVESVが急性心筋梗塞に起因する、請求項23または24に記載の使用。
- 前記大きいLVESVが慢性うっ血性心不全に起因する、請求項23または24に記載の使用。
- 前記間葉系前駆細胞もしくは幹細胞及び/またはその子孫細胞がオートロガスまたはアロジェニックである、先行請求項のいずれか1項に記載の方法または使用。
- 前記被検者がニューヨーク心臓協会(NYHA)II、IIIまたはIV度に分類される、先行請求項のいずれか1項に記載の方法または使用。
- 前記被検者に従来の心不全薬も併用投与する、先行請求項のいずれか1項に記載の方法または使用。
- 70mLを超える左室収縮末期容積(LVESV)を有する被検者における心不全を治療するための医薬品の製造における、間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子。
- 70mLを超える左室収縮末期容積(LVESV)を有する心臓を治療するための医薬品の製造における、間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子。
- 間葉系前駆細胞もしくは幹細胞の集団及び/またはその子孫細胞及び/またはそれに由来する可溶性因子またはその組成物、ならびに前記細胞、及び/またはその子孫細胞及び/または可溶性因子の投与のための送達デバイスを含むキット。
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EP3619294A1 (en) * | 2017-05-04 | 2020-03-11 | Mesoblast International Sàrl | Mesenchymal lineage precursor or stem cells with enhanced immunosuppression |
AU2022394471A1 (en) * | 2021-11-17 | 2024-06-20 | Mesoblast International Sarl | Method of treating progressive heart failure in subjects at high risk of poor outcomes |
CN117797243A (zh) * | 2022-09-30 | 2024-04-02 | 上海泽生科技开发股份有限公司 | 神经调节蛋白及其应用 |
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CN114224916A (zh) | 2022-03-25 |
JP7528149B2 (ja) | 2024-08-05 |
EP3236977B1 (en) | 2023-06-21 |
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US20170333482A1 (en) | 2017-11-23 |
CN107257687B (zh) | 2021-12-03 |
EP4249056A2 (en) | 2023-09-27 |
KR20240099504A (ko) | 2024-06-28 |
JP2021035995A (ja) | 2021-03-04 |
ES2956655T3 (es) | 2023-12-26 |
AU2015371007B2 (en) | 2021-07-08 |
EP4249056A3 (en) | 2023-10-18 |
EP3236977A1 (en) | 2017-11-01 |
AU2015371007A1 (en) | 2017-06-29 |
CA2971512A1 (en) | 2016-06-30 |
JP2024133372A (ja) | 2024-10-01 |
US11712452B2 (en) | 2023-08-01 |
KR20170095932A (ko) | 2017-08-23 |
BR112017012911B1 (pt) | 2021-10-05 |
SG10202008024VA (en) | 2020-10-29 |
SG11201704780UA (en) | 2017-07-28 |
CN107257687A (zh) | 2017-10-17 |
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JP7091427B2 (ja) | 2022-06-27 |
AU2021240102A1 (en) | 2021-10-28 |
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WO2016102597A1 (en) | 2016-06-30 |
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