JP2005526482A - Vegfr−1を発現する幹細胞の単離および動員 - Google Patents
Vegfr−1を発現する幹細胞の単離および動員 Download PDFInfo
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Abstract
Description
抗VEGFR−1MAbクローン6.12
クローン6.12は、可溶性および細胞表面発現VEGFR−1と結合するマウスモノクローナル抗体(MAb)である。それを、標準技法を用いて、MAb6.12のVLおよびVHドメインを含むScFv6.12から産生した。クローン6.12を産生するハイブリドーマ細胞株は、ATCC番号PTA−3344として寄託されている。
抗VEGFR−1MAbMF−1
アデノウイルスベクター
本実施例は、幹細胞におけるVEGFR−1の発現を調べる。特に、標準技法を用いて、ヒトまたはマウスVEGFR−1を選択的に結合する中和および非中和MAbを生成した。ヒト胎児肝臓(FL)(妊娠15〜16週)および臍帯血(CB)を胎児から得た。標準免疫磁気技法(MACS;Miltenyi Biotech)を用いて、FLおよびCBからCD34+細胞を単離した。フローサイトメトリー分析は、45〜55%の回収率を有する純度85〜95%のCD34+分画を示した。CD34+細胞(1 x 105FLまたはCB)を、蛍光イソチオシアネート(FITC)またはフィコエリトリン(PE)接合MAb;ヒトCD34−PE、CD38−PE(Beckton Dickinson)、CD15−PE(Immunotech)、AC133−PE(Miltenyi Biotech)、CD14−PE(PharMingen)、VEGFR−1−FITC(クローン6.12;ImClone Systems)を用いて、4℃で30分間インキュベートした。Coulter Eliteフローサイトメーターを用いて、二色フローサイトメトリーにより、細胞を分析した。
本実施例は、VEGFR−1+細胞の幹細胞能力を調べる。特に、VEGFR−1+細胞の幹細胞能力を、非肥満性糖尿病患者(NOD)−重症複合型免疫欠損(SCID)マウス再集団化細胞を含むin vivo再集団化検定で評価した。
本実施例は、ネズミ幹細胞中のVEGFR−1の発現を調べる。VEGFR−1がネズミ幹細胞中でも発現されるか否かを査定するために、マウスのコホートを5−フルオロウラシル(5FU)で処理して、非循環造血幹細胞(HSC)を濃化させた。要するに、マウスを亜致死用量の5FU(300 mg/kg)で処置して、迅速循環始原細胞および前駆体のアポトーシスを生じさせたが、しかし幹細胞能力を大部分は有する非循環静止細胞は生き長らえる。この後、G0幹細胞の迅速再活性化およびリンパ造血細胞の再構成を実施した。次に、Coulter Eliteフローサイトメーターを用いて、二色フローサイトメトリーにより、細胞を分析した。
本実施例は、幹細胞の低減に、特に骨髄の破壊に関連した症状の治療を調べる。VEGFR−1+BALB/cマウスBMMCのBM−再集団化能力を確定するために、5FU前処理BALB/cBMMC(前記)から得られた種々の細胞用量のVEGFR−1+細胞の精製集団を、致死的照射(9 Gy)同系マウスに移植した。
本実施例は、幹細胞に、特に骨髄の破壊に関連した症状の治療を調べる。VEGFR−1+細胞の長期BM−再集団化能力を査定するために、5FU前処理C57BL/6−Ly5.2.BMMCから得られたBMMC VEGFR−1+Sca−1+細胞を、致死的照射C57BL/6−Ly5.1マウス(N=6)中に移植した。
本発明は、幹細胞の産生におけるVEGFR−1およびVEGFR−2の役割を調べる。造血の再構築におけるVEGFR−1およびVEGFR−2発現の機能的役割を検査するために、BMが亜致死用量の5FU(300 mg/kg)により抑制されたモデルを利用した。このモデルでは、5FUによるマウスの処置は、迅速循環始原細胞および前駆体のアポトーシスを生じるが、一方、幹細胞能力を大部分は有する非循環静止細胞は生き長らえる。この後、G0幹細胞の迅速再活性化を実施して、リンパ造血細胞の再構築を4週間以内に生じた。
本実施例は、化学療法誘導性BM幹細胞抑制を改善するに際してのPlGF増大の役割を調べる。BM抑制作因、例えば5FUおよびカルボプラチン/放射線で処置したマウスのコホートを、PlGFを発現するアデノウイルスベクター(AdPlGF、前記)を用いておよび用いずに、平行して処置した。BALB/cマウスに、5FU(300 mg/kg)またはカルボプラチン(1.2 mg)の1回静注プラス全身照射(TBI;5 Gy)を施した。
本発明は、幹細胞、特にHSCの運動原性motogenic能力に及ぼすVEGFR−1の作用を調べる。VEGFR−1+CD34+細胞の移動を誘導するPlGFおよびVEGFの能力を、移行Boyden Chamber中で調べた。
本実施例は、幹細胞の移動を媒介するVEGFR−1リガンドPlGFの能力を調べる。
本実施例は、VEGFR−1がBM造血に影響を及ぼすメカニズムを調べる。
Claims (24)
- 哺乳類幹細胞の単離方法であって、以下の:
細胞の集団を提供し、
VEGFR−1に特異的に結合する分子と前記細胞の集団を接触させ、そして
VEGFR−1に特異的に結合する分子に結合した細胞を単離する
ことを包含する方法。 - 細胞の集団が、胎児肝臓、臍帯血、卵黄嚢、成熟脊髄、骨髄または成体末梢血試料から単離される請求項1または2記載の方法。
- 細胞の集団が中枢神経系から単離される請求項1または2記載の方法。
- VEGFR−1に特異的に結合する分子が抗体である請求項1〜3のいずれかに記載の方法。
- VEGFR−1に特異的に結合する分子がリガンドである請求項1〜3のいずれかに記載の方法。
- リガンドがPlGFである請求項5記載の方法。
- 1つまたはそれ以上の陽性選択マーカーと細胞を接触させ、そして1つまたはそれ以上の陽性選択マーカーに結合した細胞を単離することをさらに包含する請求項1〜6のいずれかに記載の方法。
- 陽性選択マーカーがCD34またはAC133である請求項7記載の方法。
- 1つまたはそれ以上の陰性選択マーカーと細胞を接触させ、そして1つまたはそれ以上の陰性選択マーカーに結合しない細胞を単離することをさらに包含する請求項1〜8のいずれかに記載の方法。
- 陰性選択マーカーがCD38またはLinである請求項9記載の方法。
- 単離される細胞がヒト幹細胞である請求項1〜10のいずれかに記載の方法。
- ヒト幹細胞が造血幹細胞である請求項11記載の方法。
- ヒト幹細胞が内皮、筋肉または神経幹細胞である請求項11記載の方法。
- VEGFR−1に特異的に結合する分子を含む組成物。
- VEGFR−1に特異的に結合する分子が抗体である請求項14記載の組成物。
- VEGFR−1に特異的に結合する分子がリガンドである請求項15記載の組成物。
- リガンドがPlGFである請求項16記載の組成物。
- VEGFR−1を発現する細胞を含む組成物であって、VEGFR−1を発現する細胞が請求項1〜13のいずれかに記載の方法を用いて単離している組成物。
- 哺乳類の治療方法であって、請求項14〜18のいずれかに記載の組成物を哺乳類に投与することを包含する方法。
- 治療が、造血、血管形成、および/または血管新生、あるいは筋形成および/または神経形成の誘導を包含する請求項19記載の方法。
- 治療が、投与領域への幹細胞の動員を包含する請求項19または20記載の方法。
- 治療が、増殖し、または分化するための幹細胞の刺激を包含する請求項19〜21のいずれかに記載の方法。
- 治療が、膵島細胞を再構成し、または損傷ニューロンを再生するために有用である請求項19〜22のいずれかに記載の方法。
- 心臓または末梢性虚血を治療するために有用である請求項19〜23のいずれかに記載の方法。
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US20060104963A1 (en) * | 2002-07-25 | 2006-05-18 | The Scripps Research Institute | Treatment of cone cell degeneration with transfected lineage negative hematopoietic stem cells |
US20060104962A1 (en) * | 2002-07-25 | 2006-05-18 | The Scripps Research Institute | Transfected hematopoietic stem cells and methods of treatment of neovascular eye diseases therewith |
US7838290B2 (en) * | 2002-07-25 | 2010-11-23 | The Scripps Research Institute | Hematopoietic stem cells and methods of treatment of neovascular eye diseases therewith |
GB0329449D0 (en) * | 2003-12-19 | 2004-01-28 | Omnicyte Ltd | Stem cells |
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WO2006083355A2 (en) | 2004-11-19 | 2006-08-10 | Cornell Research Foundation, Inc. | Use of vascular endothelial growth factor receptor 1+ cells in treating and monitoring cancer and in screening for chemotherapeutics |
WO2007021210A1 (fr) * | 2005-08-15 | 2007-02-22 | Krasnozhenyuk Alexei Dmitrievi | Methode de traitement de maladies causees par une pathologie vasculaire |
US20090258442A1 (en) * | 2006-08-31 | 2009-10-15 | Cell Signaling Technology, Inc. | Reagents for the detection of protein phosphorylation in carcinoma signaling pathways |
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AU2002355580A1 (en) | 2003-02-24 |
ES2299590T3 (es) | 2008-06-01 |
CA2454251A1 (en) | 2003-02-20 |
DE60223556D1 (de) | 2007-12-27 |
EP1423012A4 (en) | 2005-01-05 |
WO2003014326A3 (en) | 2003-04-10 |
EP1423012A2 (en) | 2004-06-02 |
US20050026220A1 (en) | 2005-02-03 |
EP1423012B1 (en) | 2007-11-14 |
WO2003014326A2 (en) | 2003-02-20 |
ATE378056T1 (de) | 2007-11-15 |
DE60223556T2 (de) | 2008-09-18 |
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