JP6023218B2 - 血管新生及び血管発生を調節するための方法及び組成物 - Google Patents
血管新生及び血管発生を調節するための方法及び組成物 Download PDFInfo
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Description
本出願は、2012年1月27日に出願された米国仮特許出願第61/591,486号、2012年4月24日に出願された米国仮特許出願第61/637,740号、2012年10月4日に出願された米国仮特許出願第61/709,619号(当該明細書及び図面は、すべての目的のためにそれらの全体について参照により本明細書中に組み込まれる)の利益を主張する。
適用なし。
1.対象における血管新生を増大させるための方法であって、前記方法が、前記対象にSB623細胞の集団を投与することを含み;ここで、前記SB623細胞が、(a)間葉系幹細胞の培養物を準備し、(b)ステップ(a)の細胞培養物と、Notch細胞内ドメイン(NICD)をコードする配列を含むポリヌクレオチド、ここで前記ポリヌクレオチドがNotchタンパク質の全長をコードしない、を接触させ、(c)ステップ(b)のポリヌクレオチドを含む細胞を選択し、及び(d)ステップ(c)の選択した細胞を、選択なしでさらに培養することにより得られる、方法。
(1)SB623細胞の集団;ここで、前記SB623細胞が、(a)間葉系幹細胞の培養物を準備し、(b)ステップ(a)の細胞培養物と、Notch細胞内ドメイン(NICD)をコードする配列を含むポリヌクレオチド、ここで前記ポリヌクレオチドがNotchタンパク質の全長をコードしない、を接触させ、(c)ステップ(b)のポリヌクレオチドを含む細胞を選択し、及び(d)ステップ(c)の選択した細胞を、選択なしでさらに培養することにより得られ;及び
(2)血管新生促進剤
を投与することを含む、方法。
(1)SB623細胞の集団;ここで、前記SB623細胞が、(a)間葉系幹細胞の培養物を準備し、(b)ステップ(a)の細胞培養物と、Notch細胞内ドメイン(NICD)をコードする配列を含むポリヌクレオチド、ここで前記ポリヌクレオチドがNotchタンパク質の全長をコードしない、を接触させ、(c)ステップ(b)のポリヌクレオチドを含む細胞を選択し、及び(d)ステップ(c)の選択した細胞を、選択なしでさらに培養することにより得られ;及び
(2)血管新生促進剤
を投与することを含む、方法。
(1)SB623細胞の集団;ここで、前記SB623細胞が、(a)間葉系幹細胞の培養物を準備し、(b)ステップ(a)の細胞培養物と、Notch細胞内ドメイン(NICD)をコードする配列を含むポリヌクレオチド、ここで前記ポリヌクレオチドがNotchタンパク質の全長をコードしない、を接触させ、(c)ステップ(b)のポリヌクレオチドを含む細胞を選択し、及び(d)ステップ(c)の選択した細胞を、選択なしでさらに培養することにより得られ;及び
(2)血管新生促進剤
を投与することを含む、方法。
60.前記血管新生促進タンパク質が血管内皮細胞増殖因子(VEGF)である、実施態様59に記載の方法。
「脳卒中(stroke)」は、脳における血流の機能障害に起因する状態に与えられる名称である。そのような脳血管の機能障害は、例えば、頭蓋内出血、又は脳における血流の悪化若しくは閉塞(すなわち、脳虚血)に起因し得る。虚血性閉塞は、血栓症(すなわち、頭蓋血管又は脳に供給する血管におけるその位置での凝血塊の形成)又は脳塞栓(すなわち、脳中の部位への凝血塊の移動)に起因し得る。虚血又は出血性脳卒中に起因する損傷は、通常、神経機能の機能障害につながる。異なる種類の脳卒中、及びそれらの特徴に関するさらなる情報は、共有する米国特許第8,092,792号に見られ;その開示は、異なる種類の脳卒中及びそれらの特徴を記載する目的で本明細書にその全体が参照として組み込まれる。
本開示は、対象における虚血性障害の部位にSB623細胞を移植することにより血管新生を促進するための方法に関する。SB623細胞は、MSCにおいてNotchタンパク質の細胞内ドメインを発現することによって、骨髄付着間質細胞、また間葉系幹細胞(MSC)として知られる、から得られる。MSCは、骨髄から付着細胞(すなわち、組織培養プラスチックに付着する細胞)を選択することにより得られる。
Notchタンパク質は、すべての後生動物で見られる、細胞内シグナル伝達を通じて細胞分化に影響を及ぼす膜貫通受容体である。Notch細胞外ドメインのNotchリガンド(例えば、デルタ(Delta)、セレート(Serrate)、ジャグド(Jagged))との接触は、Notchタンパク質の2つのタンパク質分解切断をもたらし、その2番目は、γ‐セクレターゼにより触媒され、そして細胞質中にNotch細胞内ドメイン(NICD)を放出する。マウスNotchタンパク質において、この切断は、アミノ酸gly 1743及びval 1744の間で起こる。NICDは、核に移行し、そこで転写因子として働き、さらなる転写調節タンパク質(例えば、MAM、ヒストンアセチラーゼ)を動員して、様々な標的遺伝子(例えば、Hes1)の転写抑制を緩和する。
細胞培養のための標準的な方法は、当該技術分野において公知である。例えば、R.I.Freshney “Culture of Animal Cells: A Manual of Basic Technique,”Fifth Edition, Wiley,New York,2005を参照のこと。
SB623細胞の調製のための1つの実施態様において、MSCの培養物は、Notch細胞内ドメイン(NICD)をコードする配列を含むポリヌクレオチドと接触させ(例えば、トランスフェクションにより);続いて薬剤選択によりトランスフェクトした細胞を濃縮し、そしてさらに培養する。例えば、米国特許第7,682,825号(2010年3月23日);米国特許出願公開第2010/0266554号(2010年10月21日);及び国際公開第2009/023251号(2009年2月19日)を参照し;それらすべての開示は、間葉系幹細胞の単離及び間葉系幹細胞のSB623細胞(それらの文書において「神経前駆細胞(neural precursor cell)」及び「神経再生細胞(neural regenerating cell)」を意味する)への変換を記載する目的のために、それらの全体について、参照により組み込まれる。
本明細書で開示されるように、本発明者等は、Notch細胞内ドメインが一時的に発現した間葉系幹細胞の子孫(すなわち、SB623細胞)が血管新生活性を有し;及び前記細胞が血管新生因子を合成しそして分泌することを見出した。従って、SB623細胞の移植は、治療的有用性が、対象において血管新生を増加することにより達成され得る障害の処置のために有用である。そのような障害は、限定されないが、脳虚血(例えば、脳卒中)、心虚血(例えば、虚血性心疾患)、腸の虚血(例えば、虚血性大腸炎、腸間膜虚血)、四肢の虚血、皮膚の虚血、虚血性眼症候群(例えば、網膜虚血)及び脳性まひが挙げられる。
本明細書に開示されるように、SB623細胞を含む治療用組成物が、また、提供される。そのような組成物は、典型的にSB623細胞及び医薬的に許容される担体を含む。追加の活性化合物が、また、SB623細胞組成物中に組み込み得る(下記参照)。
特定の実施態様において、SB623細胞組成物は、例えば、脳卒中を処置するための、血管新生を刺激する物質(「血管新生促進剤(pro‐angiogenic agents)」を含む他の組成物と組み合わせて使用し得る。組成物は、任意の順序で連続して又は同時に投与し得る。従って、本明細書で開示される通り、治療用組成物は、SB623細胞及び血管新生促進剤の両方を含み得る。さらなる実施態様において、1つがSB623細胞を含みそしてもう1つが血管新生促進剤を含む、個別の治療用組成物は、個別に又は一緒に、対象に投与し得る。
MSC及びSB623細胞を、記載のように得て及び/又は調製した。例えば、米国特許第7,682,825号(2010年3月23日)及び米国特許出願公開第2010/0266554号(2010年10月21日)、2010/0310529号(2010年12月9日)、2011/0229442号(2011年9月22日)、及び2011/0306137号(2011年12月15日)を参照し;これらの開示は、SB623細胞(これらの文献において、「神経前駆細胞(neural precursor cell)」及び「神経再生細胞(neural regenerating cell)」として様々に称される)の調製を記載する目的のために、それらの全体について、参照により組み込まれる。細胞を、10%のウシ胎仔血清(FBS,Hyclone,Logan,UT)、2mMのL‐グルタミン及び1%のペニシリン/ストレプトマイシン(Invitrogen,Carlsbad,CA(両方))を補った、α‐MEM(Mediatech,Herndon,VA)を含む成長培地で培養した。MSC及びSB623細胞は、フローサイトメトリーで測定した通り、典型的に、CD29、CD90及びCD105を発現し、そしてCD31、CD34、又はCD45を発現していなかった。
脳虚血は、患部への栄養供給の損失をもたらし得る。SB623細胞及びMSC由来の可溶性因子が、栄養欠乏内皮細胞に対する回復効果を有するかどうかを決定するために、ヒト臍帯静脈内皮細胞(HUVEC)を、血清及び増殖因子欠乏培地において、24時間培養し、次に、MSC又はSB623細胞由来の馴化培地(CM)に供した。対照培地は、CMを添加しない、血清及び増殖因子欠乏培地のままである。HUVECの生存率及び増殖能力を、その後、評価した。
Ki67は、細胞周期のG0(静止)期から出た細胞において存在するタンパク質であり;従って、Ki67のレベルは、細胞増殖の尺度として使用し得る。Ki67タンパク質を発現する細胞画分を、血清及び増殖因子を欠乏させたHUVECにおいて測定し、その後、MSC又はSB623細胞のいずれか由来の馴化培地で培養した。
HUVEC管形成アッセイを、血管形成を刺激する因子を詳しく述べるためにMSC及びSB623細胞の能力を試験するために用いた。例えば、EJ Smith & CA Station,“Tubule Formation Assays,”in Angiogenesis Assays‐A Critical Appraisal of Current Techniques,(Station,Lewis & Bicknell, eds.).John Wiley & Sons,Ltd.,West Sussex,UK,pp.65‐87,2006;及びGoodwin(2007)Microvasc.Res.74:172‐183を参照のこと。
虚血損傷後の血管系の回復は、残存している内皮細胞が、それらの移動及び浸潤を促進するシグナルを受け取る必要がある。そのようなシグナルは、とりわけ、血管平滑筋細胞、単球及び/又はマクロファージから生じ得る。血管発芽及び分岐に関わる因子の分泌を試験するために、大動脈輪アッセイを使用した。例えば、Nicosia & Ottinetti(1990)Lab.Invest.63:115‐122及びNicosia(2009)J.Cell.Mol.Med.13:4113‐4136を参照のこと。
各実験(3〜4ウェル/群)について、平均値を、(1)各細胞種の処理条件(MSC又はSB623細胞由来の馴化培地;試験したヒトドナーあたり1つの値)及び(2)非処理群(試験の各回に1つの値)について得た。統計比較(SigmaStat,SystatSoftware,Chicago,IL)について、これらの値のそれぞれを使用し、そして比較を、以下の群(1)対照(非馴化培地;n=3)、(2)MSC馴化培地(n=3〜5);及び(3)SB623細胞馴化培地(3〜5)の間で、一元配置分散分析法(one way ANOVA)を使用して行った。追加のペアワイズ比較を、Tukey法を使用して行った。0.05のα値を、平均が有意に異なるかどうかを決定するために使用した。
MSC及びSB623細胞における、特定のサイトカイン及び栄養因子のレベルを測定した。馴化培地を得るために、MSC及びSB623細胞を、増殖培地中で、90%コンフルエンスまで(〜15,000細胞/cm2)培養し、その時点で培地を除去し、細胞をPBS中で洗浄し、そしてOptiMEM(登録商標)培地(Invitrogen,Carlsbad,CA)を添加して、〜150,000細胞/mlの濃度を得た。馴化培地を、72時間後、回収し、そして取扱説明書に従って、Quantibody(登録商標)Human Angiogenesis Assay 1(RayBiotech,Norcross,GA)を使用してアッセイした。MSCの各ソースについて、細胞の一部を、MSCとして直接培養し、そして一部を、SB623細胞に変換した。従って、特定のドナー由来のMSCの培養物及びこれらのMSCから作成されたSB623細胞の培養物を、対応「ドナーペア(donor pair)」として称する。本実験において、4つのドナーペアをアッセイした。タンパク質の濃度として表した濃度を、馴化培地を採取した時、培養物中に存在する細胞の数を標準化した。図8は、ドナーによる、アンジオゲニン、ANG‐2、HB‐EGF及びPIGFについての結果を示す。図9は、またドナーによる、これらの4つの因子、及び他の6つについての結果を示し、そしてMSC及びSB623細胞によって産生された大量のVEGFを強調する。
MSC及びSB623細胞の両方によって分泌される大量のVEGFを考慮して、MSC及びSB623馴化培地の血管新生促進活性に対するVEGFの寄与を、VEGFシグナル伝達の阻害剤を使用して試験した。SU5416(VEGFR2キナーゼ阻害剤III,EMD Millipore,Billerica,MA)は、VEGF受容体2(Flk‐1)、より少ない程度に、VEGF受容体1(Flt‐1)及び他の受容体チロシンキナーゼによる下流シグナル伝達を阻止して、それによって、血管新生を阻害する。
MSC及びSB623細胞由来の馴化培地を伴うHUVEC管形成アッセイを、VEGF2受容体阻害剤SU5416の存在下及び不存在下で、実施例4に記載のように行った。馴化培地の不存在下で培養した細胞を、陰性対照として使用し;そしてVEGF(10ng/ml)の存在下で培養した細胞を、陽性対照として使用した。図12に示される結果は、VEGF、MSC馴化培地及びSB623細胞馴化培地のすべてが、管形成を促進したが、一方、VEGF2阻害剤SU5416は、これらの薬剤すべてによる管形成の刺激を低減したことを示す。
大動脈輪血管新生アッセイを、50nMのSU5416の存在下及び不存在下で、SB623細胞馴化培地の1つのバッチにおいて、実施例5に記載のように実施した。阻害剤を、CMの添加30分前に培養物に添加し、そして輪を、培養10日後にアッセイした。結果は、SB623細胞馴化培地における大動脈輪の培養物に由来する血管伸長及び分岐(図14、左及び中央パネルの比較)が、VEGF受容体阻害剤SU541の存在下(図14、中央及び右のパネルの比較)で低減したことを示す。これらの結果は、SB623細胞馴化培地の血管新生促進活性におけるVEGFの役割についてさらなる証拠を提供する。
Claims (11)
- 対象において、アンジオゲニン、アンジオポエチン‐2、上皮増殖因子、塩基性線維芽細胞増殖因子、レプチン、血小板由来増殖因子‐BB、及び胎盤増殖因子からなる群から選択される1つ以上の血管新生因子の送達による虚血性損傷の修復に使用するための組成物であって、前記組成物が、細胞の集団を含み;ここで、前記細胞が、前記血管新生因子を産生し;さらにここで、前記細胞が、以下:
(a)間葉系幹細胞の培養物を準備し、
(b)ステップ(a)の細胞培養物と、Notch細胞内ドメイン(NICD)をコードする配列を含むポリヌクレオチド、ここで前記ポリヌクレオチドがNotchタンパク質の全長をコードしない、を接触させ、
(c)ステップ(b)のポリヌクレオチドを含む細胞を選択し、及び
(d)ステップ(c)の選択した細胞を、選択なしでさらに培養すること
により得られる、組成物。 - 前記虚血性損傷の修復が、血管新生の促進、内皮細胞死の阻止、内皮細胞生存の向上、内皮細胞増殖の刺激、血管分岐の促進、及び1つ以上の血管新生因子の供給からなる群から選択される、請求項1に記載の組成物。
- 前記虚血性損傷が、中枢神経系で生じる、請求項1又は2に記載の組成物。
- 前記虚血性損傷が、脳で生じる、請求項1〜3のいずれか1項に記載の組成物。
- さらに血管新生促進剤を含む、請求項1〜4のいずれか1項に記載の組成物。
- 前記血管新生促進剤が、ポリペプチドである、請求項5に記載の組成物。
- 前記血管新生促進剤が、核酸である、請求項5に記載の組成物。
- 前記ポリペプチドが、血管新生促進タンパク質の発現を活性化する転写因子である、請求項6に記載の組成物。
- 前記血管新生促進タンパク質が、血管内皮細胞増殖因子(VEGF)である、請求項8に記載の組成物。
- 前記転写因子が、VEGF遺伝子の転写を活性化する非天然型ジンクフィンガータンパク質である、請求項8又は9に記載の組成物。
- さらに脳卒中の処置に使用するための、請求項5〜10のいずれか1項に記載の組成物。
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US20120263681A1 (en) | 2011-04-12 | 2012-10-18 | Fujifilm Corporation | Composition comprising cell and biocompatible polymer |
CA2844779A1 (en) | 2011-08-19 | 2013-02-28 | Sanbio, Inc. | Neurogenic and gliogenic factors and assays therefor |
WO2013112917A1 (en) | 2012-01-27 | 2013-08-01 | Sanbio, Inc. | Methods and compositions for modulating angiogenesis and vasculogenesis |
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AU2017272177A1 (en) | 2017-12-21 |
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AU2019204305A1 (en) | 2019-07-04 |
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AU2021203467A1 (en) | 2021-06-24 |
US20160263159A1 (en) | 2016-09-15 |
HK1199200A1 (en) | 2015-06-26 |
CN112386681A (zh) | 2021-02-23 |
AU2024200552A1 (en) | 2024-02-15 |
JP6280180B2 (ja) | 2018-02-14 |
US10245286B2 (en) | 2019-04-02 |
AU2021203467B2 (en) | 2024-06-06 |
CA2862309A1 (en) | 2013-08-01 |
AU2013211934B2 (en) | 2017-09-14 |
US20170258850A1 (en) | 2017-09-14 |
WO2013112917A1 (en) | 2013-08-01 |
CN104254337A (zh) | 2014-12-31 |
AU2019204305B2 (en) | 2021-03-04 |
US11304982B2 (en) | 2022-04-19 |
US20130195817A1 (en) | 2013-08-01 |
JP2015504922A (ja) | 2015-02-16 |
EP4218727A2 (en) | 2023-08-02 |
AU2013211934A1 (en) | 2014-07-31 |
US20190167730A1 (en) | 2019-06-06 |
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